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  • Polymer and Materials Science  (5,570)
  • 1980-1984  (3,049)
  • 1975-1979  (2,521)
  • 1981  (3,049)
  • 1977  (2,521)
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  • 1980-1984  (3,049)
  • 1975-1979  (2,521)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Masthead (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977) 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280101
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  • 2
    Electronic Resource
    Electronic Resource
    An Evaluation of Polarization Resistance Measurements (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 6-11 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Auswertung von PolarisationswiderstandsmessungenMit Hilfe der linearen Polarisationsmethode, der Polarisationswiderstandsmessung, der Dreipunkt- und der Corfit-Methode wurde der Polarisationswiderstand von Stahl AISI 4130 in inhibierter Salzsäure bestimmt. Aus den Ergebnissen der Dreipunkt- und der Corfit-Methode kann man den Korrosionsstrom und die Tafelneigungen direkt erhalten. Ein Vergleich der nach den vier Methoden erhaltenen Ergebnisse wird durchgeführt und die Anwendung dieser Methoden zur on-line-Überwachung der Inhibitorkonzentration in Beizlösungen wird beschrieben.
    Notes: The linear polarization, polarization resistance, threepoint and CORFIT method have been used to determine polarization resistance values for 4130 Steel in inhibited HCl. From the three-point and the CORFIT method the corrosion current and the Tafel slopes are obtained directly. A comparison of the results obtained by the four methods and an application to on-line monitoring of inhibitor levels in pickling baths are given.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280103
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  • 3
    Electronic Resource
    Electronic Resource
    Aufkohlung von Schleudergußrohren in der petrochemischen Industrie und Erklärung dieses Verhaltens durch Laborversuche mit Chrom-Nickel-Stählen und - Werkstoffen im Temperaturbereich von 800-1150°CVortrag, gehalten auf der Achema-Tagung, 20.-26. Juni 1976 in Frankfurt. (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 1-6 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Carburization of centrifugally cast tubes in the petrochemical industries and explication of this behaviour by laboratory tests with chromium nickel steels and chromium nicked materials in the temperature range 800 to 1150°CThe carburization behaviour of the tubes used under the conditions of petrochemical cracking processes depends in a first line on the temperature. Up to 1000°C carbon pickup is low, but above 1050°C heavy carbon pickup and increasing carburization depth must be counted with. This temperature dependence is due to the fact that at 1050°C equilibrium is attained between chromium oxide and carbide, so that the oxide is no longer stable and the original protective effect of the oxide layer is lost. It is for this reason that pre-oxidation of the tubes has not only favourable effects: during cooling cracks may form in the oxide layer, so that carburization of a surface layer may set in at temperatures as low as 800°C. Carburization is delayed by high Cr, Ni and Si contents: for uses at 1100°C at least 28% Cr, 32% Ni and 2.5% Si are required.
    Notes: Das Aufkohlungsverhalten von unter den Bedingungen der petrochemischen Crackverfahren verwendeten Rohren ist von allem abhängig von der Temperature. Bis 1000°C ist die Kohlenstoffaufnahme gering. ab 1150°C ist jedoch mit starker Kohlenstoffaufnahme und größser werdender Aufkohlungstiefe zu rechne. Ursache dieser Temperaturabhängigkeit ist der Umstand, daß bei 1050°C das Gleichgewicht zwischen Chromoxid und Chromcarbid erreicht wird, so daß das Oxid nicht mehr beständig ist und die ursprünglich vorhandene Schutzwirkung der Oxidschicht verlorengeht. Deshalb ist auch eine Voroxidation der Rohre nur sehr bedingt geeignet: beim Abkühlen kann es zu Rißbildung in der Oxidschicht kommen, wodurch schon bei Temperaturen um 800°c Randaaufkohlung möglich wird. Verzögert wird die Aufkohlung durch hohe Gehalte an Cr, Ni und Si: für Verwendung bei 1100° sind z. B. mindestens 28% Cr, 32% Ni und 2,5% Si erforderlich.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280102
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  • 4
    Electronic Resource
    Electronic Resource
    Über den Einfluß des Flächenverhältnisses auf die Stromdichte in galvanischen Zellen und Belüftungszellen (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 12-17 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Influence of the area ratio on the current density in galvanic and aeration cellsWith a view to corrosion phenomena on conventional metal combinations the corrosion current density has been studied as a function of the cathode: anode area ratio in aeration cells (Fe/Zn, Fe/Fe, Zn/Zn, with Na-sulfate and NaCl as electrolytes) and in galvanic cells (Cu/Fe, Cu/Zn, with Cu—, ammonium and zinc sulfate as electrolytes). It was the aim of the investigation to find out the extent to which the theoretical ideas of Mansfeld and Akimov concerning film rupture and diffusion control may be applicable. It is found that mansfeld's concept must be extended to include the effective electrode potentials in order to allow an interpretation of corrosion current density in aeration cells. In the case of galvanic cells, however, there is a limitation attributable to the cell resistance which is determined by independent resistance measurements. The corrosion behaviour of the metals studied is interpreted in terms of the measured current densities.
    Notes: Im Hinblick auf die Korrosionsvorgänge an gängigen Metallkombinationen wurde die Korrosionsstromdichte in Abhängigkeit vom Flächenverhältnis Kathode: Anode in Belüftungszellen (Fe/Zn, Fe/Fe, Zn/Zn, mit Na-Sulfat und NaCl als Elektrolyt) und in galvanischen Zellen (Cu/Fe, Cu/Zn, mit Kupfer-, Ammonium- und Zinksulfat als Elektrolyt) untersucht. Dabei sollte festgestellt werden, inwieweit die theoretischen Vorstellungen von Mansfeld und Akimov bezüglich der Durchtritts- und Diffusionskontrolle hierauf anwendbar sind. Es wird gefunden, daß zur Interpretation der Korrosionsstromdichte der Belüftungszellen das Konzept von Mansfeld um die tatsächlichen Elektrodenpotentiale erweitert werden muß. Bei den galvanischen Zellen ergibt sich eine Begrenzung durch den Zellenwiderstand, der durch unabhängige Widerstandsmessungen nachgewiesen wird. Das Korrosionsverhalten der untersuchten Metalle wird auf der Grundlage der gemessenen Stromdichten gedeutet.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280104
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  • 5
    Electronic Resource
    Electronic Resource
    Einfluß der Kationenzusammensetzung von Chloridlösungen beim Modellieren von Korrosionseinflüssen der Küstenatmosphären (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 17-19 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Influence of the cation composition of chloride solutions in modelling corrosion effects due to caoastal atmospheresPure sodium chloride solutions cannto be used for accelerated weathering tests in artificial sea atmosphere. A spray liquid suitable for such tests is artificial seawater containing (grams/litre) 27 NaCl, 6 Mg chloride, 1 Ca chloride and 1 KCl. The corrosion behaviour of the two metals studied - iron and zinc - is characterized by typical differences, in particular variations depending on the salt quantity applied. While the corrosion of iron at first increases with the salt concentration applied and achieves a maximum at about 1000 mg/m2d, the losses of zinc increase just to a salt quantity of 200 mg/m2 d and are then practically constant up to about 1000 mg/m2d; at higher concentrations there is again a slight diminuation of corrosion. The corrosion in artificial seawater is more pronounced than in sodium chloride solutions; this fact can be attributed to the hydrolysis of the chlorides in seawater, which gives rise to the formation of anodic and cathodic regions on the metal surface; as a consequence, pH differences are created and corrosion is enhanced. In order to simulate natural conditions as closely as possible the application of the salt spray should be interrupted by extended dry periods.
    Notes: Bei der beschleunigten Bewitterung in Künstilicher Meeresatmosphäre darf keinesfalls mit reinen Natriumchloridlösungen gearbeitet werden. Als Sprühflüssigk eit geeignet ist künstliches Meerwasser mit (g/l) 27 Nacl, 6 Mg-chlorid, 1 Ca-Chlorid und 1 KCL. Das Korrosionsverhalten der beiden untersuchten Metalle - Eisen und Zink- zeigt dabei charakteristische Unterschiede, vor allem in Abhängigkeit von der aufgebrachten Salzmenge. Während die Korrosion des Eisens mit zunehmender Salzkonzentration zunächst ansteigt und bei etwa 1000 mg/m2. Tag ein Maximum durchläuft, steigt die Abtragung von zink nur bis zur Salzdosierung von 200 mg/m2. Tag an und bleibt dann bis etwa 1000 mg/m2. Tag praktisch konstant; bei noch höheren Konzentrationen kommt es wieder zu einem flachen Abfall. Die im Vergleich zu Natriumchloridlösungen höhere Korrosion in künstlichem Meerwasser läßt sich auf die Hydrolysierbarkeit der Chloride zurückführen, wodurch an der Oberfläche des Metalls anodische und kathodische Bereiche mit unterschiedlichem pH entstehen, so daß die Korrosion beschleunigt abläuft. Um die natürlichen Bedingungen möglichst genau nachzuahmen, sollte die Salzaufgabe von längeren Trockenperioden unterbrochen sein.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280105
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Passivierung des Eisens in wäßrigen Lösungen durch das System „Sauerstoff/Phthalat“ (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 20-26 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigation into the passivation of iron in aqueous solutions of the system “phthalat/oxygen”The passivation properties of dissolved oxygen on iron and mild steel in potassium hydrogenphthalate solutions have been studied by means of potentiodynamic polarisation curves and potential/timemeasurements. It is shown that the critical passivation current in a solution of constant phthalate concentration decreases with increasing dissolved oxygen concentration and the solution pH. The transition from active dissolution to passivation associated with a potential shift toward more noble values depends on critical minimum values of pH and dissolved oxygen concentration in the solution. Under these conditions the oxygen reduction diffusion current is greater than the critical passivation current. This effect is interpreted in terms of interactions of phthalate ions on the interface iron/solution.
    Notes: Mit Hilfe von potentiodynamischen Polarisationskurven und Elektrodenpotential - Zeit- Messungen wurden die Passivatoreigenschaften von gelöstem Sauerstoff auf Eisen und Baustahl in Kaliumhydrogenphthalatlösungen untersucht. Es wird gezeigt, daß die kritische Passivierungsstromdichte in einer Lösung konstanter Phthalatkonzentration mit Zunahme der Sauerstoffkonzentration und des pH-Wertes abnimmt. Der Übergang von der aktiven Auflösung zum Passivzustand ist mit einer Positivierung des Elektrodenpotentials verbunden und hängt von kritischen Mindestwerten des pH und der Sauerstoffkonzentration in der Lösung ab. Unter diesen Bedingungen ist der Sauerstoffdiffusionsstrom größer als die kritische Passivierungsstromdichte. Dieser Effekt wird mit Wechselwirkungen der Phthalationen an der Phasengrenze Eisen/Lösung zu erklären versucht.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280106
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  • 7
    Electronic Resource
    Electronic Resource
    Werkstoffprüfverfahren und -einrichtungen (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 377-379 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280512
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  • 8
    Electronic Resource
    Electronic Resource
    Nichteisenmetalle (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 382-386 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280514
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  • 9
    Electronic Resource
    Electronic Resource
    Kunststoffe und andere organische Werkstoffe (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 386-388 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280516
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  • 10
    Electronic Resource
    Electronic Resource
    Organische Überzüge (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 391-393 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280519
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  • 11
    Electronic Resource
    Electronic Resource
    Entwicklungen zur Festigkeitssteigerung der Stähle. Chr. Straßburger. Teil I: 150 S. (Text); Teil II: 134 S. mit 127 Abb. und 6 Tab. (DIN A 4/VI-1976). Verlag stahleisen mbH, Düsseldorf: 52, - DM (ISBN 3-514-00186-3) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 394-394 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280520
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  • 12
    Electronic Resource
    Electronic Resource
    Die Spannung-Dehnung-Kurve von Stahl. W. Dahl und H. Rees. 417 S. (Text), 2 Tab./132 S. (Bildband) DIN A4/VII (1976). Verlag Stahlesien mbH, Düsseldorf - geb.: 89, - DM (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 394-394 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280521
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  • 13
    Electronic Resource
    Electronic Resource
    Personalnachrichten (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 394-394 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280524
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  • 14
    Electronic Resource
    Electronic Resource
    Masthead (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977) 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280601
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  • 15
    Electronic Resource
    Electronic Resource
    Chromium depletion from stainless steels during vacuum annealing (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 405-409 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Chromverarmung nichtrostender Stähle beim Glühen im VakuumBei der selektiven Oxidation von Chrom in nichtrostenden Stählen wird das Oxidatinos-verhalten stark von den Veränderungen der Chromkonzentration an der Metalloberfläche und im Metall beeinflußt. Nach den bisherigen Annahmen verhält sich das Chrom bei der selektiven Oxidation ebenso wie bei der Verflüchtigung während des Vakuumerhitzens auf hohe Temperaturen. In der vorliegenden Arbeit wird die Verdampfung von Chrom aus Stahl 316 bei Vakuumanlassen bei 1000 °C mittels energiedispersiver Röntgenstrahlen- und Neutronenaktivierungsanalyse untersucht. Es wird festgestellt, daß der Chromverlust aus austenitischen nichtrostenden Stählen durch Interdiffusion in der Legierung kontrolliert wird. Entsprechend der Vorhersage nimmt die Chromkonzentration an der Metalloberfläche mit zunehmender Erhitzungsdauer ab. Das Chromverarmungsprofil im Metall stimmt gut über in mit einem früher obgeleiteten Modell, abgesehen von einer anomalen Zone in Oberflächennähe. Die hohe Auflösung der Neutronenaktivierungstechnik läßt erkennen, daß es sich um eine etwa 2μm dicke Zone handelt, wo die Chromkonzentration steiler absinkt als es den erwartungen entspricht.
    Notes: During selective chromium Oxidation of stainless steels the changes in chromium concentration at the metal surface and in the metal have an important bearing on the overall oxidation performance. It has been proposed that an analogue of chromium behaviour during selective oxidation is obtained from volatilisation of chromium during high temperature vacuum annealing. In the present report the evaporation of chromium from 316 type of steel, vacuum annealed at 1000 °C, has been investigated by menas of energy dispersive X-ray analysis and by neutron activation analysis. It was established that chromium loss from austenitic stainless steels is rate controlled by interdiffusion in the alloy. As predicted the chromium concentration at the metal surface decreased with increasing vacuum annealing time. The chromium depletion profile in the metal was in good agreement with the previously derived model apart from an anomalous region near the surface. Here the higher resolution of the neutron activation technique indicated a zone within ∼2μm of the surface where the chromium concentration decreased more steeply than expected.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280603
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  • 16
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    High purity ferritic Cr—Mo stainless steel - Five years' successful fight against corrosion in the process industryVortrag, gehalten auf der Achema-Tagung, 20.-26. Juni 1976 in Frankfurt (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 409-416 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Hochreine ferritische CrMo-Stähle - Fünf erfolgreiche Jahre für die Korrosionsbe-kämpfung in der VerfahrensindustrieIm Laufe von 5 Jahren hat der ferritische nichtrostende Stahl E-Brite 26-1 eine beträchtliche Bedeutung innerhalb der für Chemieanlagen infrage kommenden Werk-stoffe erreicht. Als nichtrostende Stähle ist er hinsichtlich seiner Anwendbarkeit mit viel kostspieligeren Legierungen vergleichbar. Der Stahl hat sich als wirtschaftliche Alternative für Anlagen erwiesen, die mit Alkalien, Salpetersäure-Harnstoff, organischen Chemikalien, Zellstofflaugen, Raffinerieprodukten u. v. a. in Kontakt kommen. Das Vertrauen der Verbraucher in die Zuverlässigkeit dieses Stahls ist so stark, daß heute auch große kritische Anlagen auf Routinebasis aus diesem Stahl verlangt werden. Aufgrund der guten Aufnahme des neuen Materials auf dem Markt hat man versucht, Ersatzversionen zu entwickeln. Diese Nachahmungen sind jedoch mit Vorsicht zu betrachten. Ein stabilisierter 26-IS muß noch längere Zeit untersucht werden, um festzustellen, ob er hinsichtlich Korrosionsbeständigkeit, Duktilität, Verarbeitbarkeit und Reproduzierbarkeit der Eigenschaften mit E-Brite 26-1 vergleichbar sein kann.
    Notes: In five years, E-BRITE 26-1 ferritic stainless steel has won an important place in the spectrum of materials suitable for use in chemical process equipment. It provides, in stainless steel, performance-capability characteristics comparable to more expensive alloys. It has demonstrated cost-effectiveness in equipment used for caustic, nitric-urea, organic chemicals, pulping liquors, refinery streams, and elsewhere. User confidence in the reliability and integrity of Grade XM 27 has increased to the point where large critical systems are now routinely specified in the alloy. The market acceptance of this material has attracted attempts to produce substitute versions of the alloy. Imitation, should be viewed with caution. Stabilized 26-IS must be examined over a lengthy period of time to determine if its own corrosion resistance, ductility, fabricability, and reproducibility properties could ever be likened to those of E-BRITE 26-1.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280604
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  • 17
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    Aus Industrie und Technik (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 429-431 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280607
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  • 18
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    Umschau (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 431-433 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280608
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  • 19
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    Werkstoffverhalten und Werkstoffeigenschaften (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 447-447 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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    Eisenmetalle (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 448-453 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19770280612
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    Nichtmetallische anorganische Werkstoffe (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 455-456 
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    Keywords: Chemistry ; Polymer and Materials Science
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    URL: http://dx.doi.org/10.1002/maco.19770280614
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    Metallische Überzüge (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 459-459 
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    Keywords: Chemistry ; Polymer and Materials Science
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    URL: http://dx.doi.org/10.1002/maco.19770280616
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    Organische Überzüge (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 459-461 
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    Keywords: Chemistry ; Polymer and Materials Science
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    URL: http://dx.doi.org/10.1002/maco.19770280618
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    Zementchemie für Bauingenieure. Von W. Czernin, 3 neu bearb. Auflage, 194 S., 46 Bilder, 89 Quellen, Bauverlag Wiesbaden - Berlin 1977 (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 462-462 
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    Keywords: Chemistry ; Polymer and Materials Science
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    URL: http://dx.doi.org/10.1002/maco.19770280621
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    Grundlagen der Instandhaltung. G. Mildner und G. Jarosch. 3., überrb. Auflage (1976). 127 S., 87 Abb., 4 Tab. und 50 Aufgabenstellungen (16,5 × 23 cm). VEB Deutscher Verlag für Grundstoffindustrie, Leipzig - brosch.: 10,- DM (Bestell-Nr.: 541 195 4) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 462-462 
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    Gießereiprozeßtechnik. Herausg.: K. Stölzel. 3., überarb. Auflage (1975). 225 S., 165 Abb. und 18 Tab. (16,5 × 23 cm). VEB Deutscher Verlag für Grundstoffindustrie, Leipzig - Ln.: 38,- DM (Bestell-Nr.: 541 060 1) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 462-462 
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    Keywords: Chemistry ; Polymer and Materials Science
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    URL: http://dx.doi.org/10.1002/maco.19770280623
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    Masthead (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977) 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19770280701
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    Pitting Potentials of Aluminium Alloys (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 475-477 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: Lochkorrosionspotentiale von AluminumlegierungenDas Lochkorrosionspotential der folgenden Aluminiumlegierungen wurde in 3%iger NaCl-Lösung potentiodynamisch und potentiostatisch bestimmt: Al-2,7 Mg-(0-,94) Mn; Al-2,7 Mg-0,43 Mn-(d0-0.3) Cr; Al-4,7 Mg-0,13 Cr-0,78 Mn; Al-5,1 Mg-0,1 Sb; al-5,1 Mg-0,3 Sb; Al-2S-1/2H (handelsübliches Aluminum) und hochreines Aluminum (99,99 Al). Die Ergebbisse zeigen, daß die Legierungszusätze das Lochfraßpotential nicht sehr stark beeinflussen. Mit zunehmendem Magnesiumgehalt nimmt das Lochfraßpotential ab, während es mit zunehmendem Mangangehalt bis zu einem bestimmten Punkt zunimmt. Die Art und die Menge der Sekundärphasen scheinen das Lockkorrosionspotential nicht merklich zu beeinflussen.
    Notes: The pitting potential of the following aluminum alloys in 3% sodium chloride solution was measured using potentiodynamic and potentionstatic methods: Al-2.7 Mg with 0-0.47% Cr, Al-2.7 Mg with 0-0.94% Mn, Al-2.7 Mg-0.43 Mn with 0-0.31% Cr, Al-4.7 Mg-0.13 Cr-0.78 Mn, Al-51 Mg with 0.1 and 0.3% Sb, Al 2S-1/2H (commercial aluminum) super pure Al (99,99% Al). The results show that the pitting potential is not much affected by the alloying elements. The pitting potetial decreases with increasing content of magnesium and increases slightly with increasing content of manganese up to a certain point. The nature and amount of secondary phases do not seem to have any marked influence upon the pitting potential.
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    Untersuchungen zur passivierenden Wirkung organischer Oxydationsmittel auf Eisen in neutralen und schwach sauren Lösungen. 2. Mitteilung: Aromatische Nitroverbindungen1. Mitteilung: G. Reinhard, M. Fischer, W. Forker in Werkstoffe u. Korrosion 24 (1973) 863. (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 470-475 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: Investigation into the passivation effect of organic oxidizing agents on the corrosion of iron in neutral weakly acid solutions. 2nd communication: Aromatic nitrocompoundsThe present communication is con cerned with the corrosion inhibiting properties of aromatic nitro compounds on iron in the neutral range. Nitrobenzenes (m-nitroaniline, p-chloronitrobenzene, M-nitrobenzoic acid, ethylester, p-nitrobenzaldehyde, p-nitrobenzonitrile) in concentrations between 0,25 · 10-2 and 0.5 · 1-2 Mole/litre act as stimulators in airsaturated 20% methanol of pH 6.8. Their combination with a 20% methanolic boric acid/borate solution of pH 6.8 - which, as such, only maintains passivity, yields passivating systems. From these examples as well as from others involving known inhibitors it appears highly probable that the prassivation of iron by corrosion inhibiting addition in the neutral range, too, requires a communication of oxidizing and non-oxidizing agents (combination principle )able to lower the critical passivation current density.
    Notes: Im vorliegenden Beitrag wird über die korrosionshemmenden Eigenschaften aromaintient la passivité, produit des systémes Eisen im Neutralbereich berichtet. Nitrobenzole (m-NH2- p-Cl, m-H5 C2 OOC, p-CH3CO, p-CN) in Konzentrationen zwischen 0,25 · 10-2 und 0,5 10-2 Mol/l wirken in luftgesättigtem 20%igem Methanol bei pH 6,8 als Stimulatioren. Ihre Kombination mit einer 20%ig methanolischen Borsäure-Borax-Lösung, pH 6,8, die selbst nur passivität serhaltend wirkt, führt zur passivierenden Systemen. An diesen sowie an Beispielen bekannter Passivatoren wird wahrscheinlich gemacht, daß sur Passivierung des Eisens durch korrosionshem-mende Zusätze auch im Neurtralbereich die kombinierte Anwendung von Oxydationsmitteln und nichtoxydierend wirkenden Verbindungen, die die kritische Passivierungsstromdichte senken, erforderlich ist (Kombinationsprinzip).
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    Patentschau (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 490-502 
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    Keywords: Chemistry ; Polymer and Materials Science
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    URL: http://dx.doi.org/10.1002/maco.19770280709
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    Korrosions- und Werkstoffprüfung (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 503-504 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Eisenmetalle (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 506-510 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Kunststoffe und andere organische Werkstoffe (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 514-517 
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    Keywords: Chemistry ; Polymer and Materials Science
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    URL: http://dx.doi.org/10.1002/maco.19770280715
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    Nichtmetallische anorganische Überzüge (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 517-518 
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    Oberflächenbehandlung mittels Strahlmitteln. J. Horowitz. 230 s. und Inhaltsverzeichnis, zahlr. Abb. und Tab. (DIN A 4) (1976). Forster-Verlag AG, Zürich - sfr. 59 (zuzügl. Porto) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 520-520 
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    Erdölverarbeitung - Petrolchemie. (English - Deutsch - Französisch - Russisch.) W. Leipnitz. Etwa 6000 Wortstellen. 1. Aufl. (1976). VEB Verlag Technik Berlin/Oscar Brandstetter Verlag KG, Wiesbaden - geb.: 60, - DM (ISBN 3 87097 073 1) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 520-520 
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    Elektrochemische Korrosionsmessungen an dem Aluminiumwerkstoff AlMgMn zur Ermittlung seines KorrosionsverhaltensVortrag, gehalten auf der Konferenz über „Korrosion und Korrosionsschutz von Aluminium“, 88. Veranstaltung der Europäischen Föderation Korrosion, im November 1976 in Budapest. (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 521-529 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: Electrochemical corrosion measurements on the aluminium alloy AlMgMn with a view to establishing its corosion behavior.During an experimental investigation AlMgMn-alloy with different surface conditions have turned out to have different resistances to corrosion in ground water (City of Bonn.) The surface conditions used for the test included Boehmite layers obtained in boiling water as well as green and yellow chromatizing layers, oxide layers obtained by anodic polarization and specimens having a high gloss by polishing. Among the surface layers the anodic oxide layeronly can be termed corrosion resistant. It is shown on the base of the results obtained that electrochemical measurements in the laboratory allow a judgement concerning the possibility of pitting corrosion under the particular conditions.
    Notes: Bei Versuchen in Brunnenwasser (Stadt Bonn) erweisen sich verschiedene Oberflächenzustände der AlMgMn-Legierung als unterschiedlich wirksam. Bei den Versuchen wurden in siedendem Wasser erzeugte Boehmit-Schichten sowie Grün- und Gelbchromatierungsschichten, durch anodische Polarisation erzeugte Oxidschichten sowie glanzpolierte Proben verwendet. Von den Deckschichten ist nur die anodische Oxidschicht als beständig anzusehen, alle anderen bieten keinen oder nur zeitweiligen Schutz gegen Lochkorrosion. Es ist aufgrund der Ergebnisse möglich, mit Hilfe von elektrochemischen Messungen im Laboratorium festzustellen, ob unter den gegebenen Bedingungen mit Lochkorrosion zu rechen ist.
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    Corrosion resistance and mechanical properties of nickel-bearing ferritic stainless steels (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 536-543 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Korrosinsbeständigkeit und mechanische Eigenschaften von nickelhaltigen ferritischen stählenZusatz von nickel zu ferritischen Stählen mit 25-28% Cr und 2-4% Mo verbessert die Schlagzähigkeit, vor allem bei Ni-Gehalten oberhalb 2%. Die Wirkung des Nickels nimmt bis zur untersuchten Obergrenze (4%) zu. Niobstabilisierte Stähle haben niedrigere Übergangstemperaturen als entsprechende titanstabilisierte. Stähle mit 4% Nickel müssen bei 1050°C angelassen werden, um Bildung intermetallischer Verbindungen zu vermeiden. Ferner wurde beobachte, dß Nickel die obere Schwellenenergie bei der Kerbschlagprüfung nach Charpy verringert und den scharfen Überzug zäh/spröd aus schalter. Ein deutlicher Einfluß des Nickels auf das Lochkorrosionspotential wurde nicht festgestellt; die Stähle in der Reihe 25 Cr-3,5 Mo-Ni--Ti hatten jedoch durchweg edlere Lochkorrosionspotentiale und besser Spaltkorrosionsbeständigkeit als die Stähle mit 28Cr und 2Mo (Ni Ti) Die Spaltkorrosionsbeständigkeit wird durch 1 order 2% Nickel verbessert, während höhere Gehalte ungünstig zu sein scheinen. Die kritische Passivierungsstromdichte in 1 n Schwefel-und Salzsäure wird durch Nickel stark verringert, weshalb die Beständigkeit dann erhöht ist. Durch 1% Nickel werden die angelassenen Stähle anfällig für Spannungsrißkorrosion in Magnesiumchloridlösung bei 140°C, während geschweißte Stähle mit 4% Nickel in siedender 25%tiger Natriumchloridlösung bei pH l Keine Rißbildung aufweisen.
    Notes: Additions of nickel to ferritic steels containing 25-28% Cr and 2-4% Mo increased the impact toguhness especially when more than 2% Ni was present. The effect of nickel content increased up to 4% Ni, the largest addition studied. Steels stabilized with niobium had lower transition temperatures then did corresponding steels stablizied with titanium. Steels containing 4% Ni required annealing at 1050 C to avoid intermetalic compounds. It was also noted that nickel reduced the upper shelf energy in the Charpy impact test and eliminated a sharp transition from ductile to brittle behaviour.No definite effect of nickel on pitting potential was pound but steels in the series 25Cr-3.5 Mo-Ni-Ti consistenly had more noble pitting potentials and greater resistance to crevice corrosion than the 28 Cr-2Mo-Ni-Ti steels. Nickel contents of 1 or 2% tended to improve crevice corrosion resistance while larger nickel contents were somewhat ditrimental. Nickel strongly reduced critical current densities for passivity both in l N H2SO4 and in l N HCL and yielded corresponding increases in resistance to corrosion by these acids. Although 1% Ni or more caused the annealed steels to be susceptible to stress corrosion cracking in MgCl2 boiling at 140 C, while the as-Welded steels containing 4% Ni did not crack in boiling 25% Nacl at pH 1.
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    Umschau (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 556-565 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Aus Industrie und Technik (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 552-556 
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    Korrisons- und Werkstoffprüfung (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 579-579 
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    Arbeiten über mehrere Werkstoffgruppen (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 579-581 
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    Eisenmetalle (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 581-588 
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    Kunststoffe und andere organische Werkstoffe (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 591-592 
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    Nichtmetallische anorganische Überzüge (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 592-592 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280817
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    Journal of non-equilibrium thermodynamics. Band 1, Heft 1 and 2, Seiten 1/78, 79/126, kartoniert, Verlag Walter de Gruyter & Co., Berlin-New York, Anschrift: In Deutschland: Genthinerstr. 13, D 1000 Berlin 30, Tel.: (030) 261 13 41; in USA: Walter de Gruyter Inc., 3 Westchester Plaza, Elmsford, N. Y. 10 523, Tel.: (914) 592-58 90. Preis DM 45.- je Heft zuzügl. Postgebühren (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 594-594 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    URL: http://dx.doi.org/10.1002/maco.19770280819
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    Abgas, Abwasser, Abfall, Recycling, Lärm. (Dechema-Monographien/Band 80). - Band I: 23 Vorträge/Band II: 31 Vorträge; 341 S. (I), 795 S., zahlr. Abb. (II) - (1976) - Verlag Chemie GmbH, Weinheim - Kunststoffeinb.: 102, -DM (für Mitglieder der DECHEMA od. Der Mitgliedsvereine der Europäischen föderation für Chemie-Ingenieur-Wesen: 81,60 DM) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 594-594 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    URL: http://dx.doi.org/10.1002/maco.19770280820
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    Handbuch für Kesselwärter. (Band II) 9. verbesserte Aufl. (1976), 232 S., 164 Abb. (16,5 × 23 cm). VEB Deutscher Verlag für Grundstoffindustrie, Leipzig - Halbln.: 9,80 DM (Bestell-Nr. 541 233 2) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 595-595 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280822
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    Beobachtungen zur Ausbreitung von Spannungskorrosionsrissen in einer reinen AlZnMg3-LegierungAuszug aus der Diplomarbeit J. Richter, Erlangen 1974 (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 602-606 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Observations concerning stress corrosion crack propagation in a pure AlZnMg3 alloyThe propagation of stress corrosion cracks has been studied (by micro fotography) using potentionstatically polarized specimens notched on one side and held underconstant load in air saturated NaCl solution. According to the results obtained crack propagation is discontinuous; the stop points visible in the crack length-time-curve may be characterized as collisions between crack tips and grain boundary triple points. At - 1100 mV the crack propagation velocity is higher than at -mV provided the particular potential has been given from the very beginning. If, however, the potentials is varies from-1100 to -1300 MV during the measurement the change in crack propagation velocity is negligable (the same applies to potential changes at the time of small crack length). The discontinuity in crack propagation may be explained by assuming hydrogen embrittlement or selective corrosin to occur at the crack tip.
    Notes: Die Ausbreitung von Spannungskorrosionsrissen wurde an potentiostatisch polarisierten, einseitig gekerbten Proben unter konstanter Belastung in luftgesättigter NaCl-Lösung mikrofotografisch verfolgt. Die Risse breiten sich danach diskontinuierlich aus; die in der Rißlänge-Zeit-Kurve erkennbaren. Haltepunkte können als Auftreffen von Rißspitzen auf Korngrenzen-Tripelpunkte identifiziert werden. Bei - 1100 mV breitet sich der Riß schneller aus als bei - 1300 mV, wenn das jeweilige Elektrodenpotential von Anfang an vorgegeben ist. Wird dagegen das Potential von - 1100 auf -1300 mV verändert, so ist die Rißgeschwindipkeit nur geringfügig verändert (gleiches gilt für Potentialveränderungen zum Zeitpunkt kleiner Rißausbreitung). Die diskontinuierliche Rißausbreitung kann da nach mit Hilfe der Annahme erklärt werden, daß an der Rißspitze Wasserstoffversprödung oder selektive Korrosion auftreten.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280903
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    Untersuchungen zu Korrosionsproblemen bei der Förderung von SauergasHerrn Prof. Dr. techn., Dip1.-Ing., Dr. phil. habil. Friedrich Asinger, ehem. Direktor des Instituts für Technische Chemie und Petrolchemie der Rheinisch-Westfälischen Hochschule Aachen zum 70. Geburtstag in Verehrung gewidmet (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 597-602 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations on corrosion problems during sour gas winningAqueous alkylamine solutions containing large amounts of hydrogen sulfide and carbon dioxide are very corrosive for steel 37 Mn 5 at 13°C and 130 bar (N2). Depending on the velocity of flow, corrosion rates of 10 to 45 mm/a were measured at flow rates of 20 to 200 cm/sec. At special flow conditons local attack with much higher corrosion rates were observed. In the presence of polysulfide the corrosion rates are drastically descreased even at extreme flow rates. At flow rates up to 100cm/sec the linear corrosion rates only amount to 0,5 mm/a. At higher flow rates and under special flow conditions some local attack can occur which, however, is much less severe than in polysulfide-free solutions. The different corrosivity in the absence or presence of plolysulfide can be explained by different electrochemical corrosin mechanisms and the formation of differently protecting iron sulfide scales.
    Notes: Der Stahl 37 Mn 5 korrodiert in wäßrigen Alkylaminlösungen, die größere Mengen Schwefelwasserstoff und kohlendioxid enthalten, bei 130°C und 130 bar (N2) in Abhängigkeit von der Fließgeschwindigkeit des mediums mit linearen Abtragsraten von 10-45 mm/a bei Strömungsgeschwindigkeiten von 20-200 cm/sec. Unter besonderen Strömungsbedingungen wird auch lokaler Angriff mit höheren korrosionsgeschwindigkeiten beobachtet. Durch die Gegenwart von polysulfid wird die Abtrasrate auch bei extremen Strömungsgeschwindigkeiten drastisch vermindert. Bei Fließgeschwindigkeiten bis zu 1 m/sec ist lediglich mit linearen Abtragsraten von etwa 0,5 mm/a zu rechnen. Bei höheren Fließgeschwindigkeiten und unter besonderen Strömungsbedingungen kann jedoch auch in polysulfidhaltigen Lösungen lokalkorrosion auftreten, allerdings in weitaus geringerem Maße als in Abwesenheit von Polysulfid. Bei der Deutung der unterschiedlichen korrosivität polysulfidfreier un polysulfidhaltiger Lösungen muß neben unterschiedlichen korrosionsmechanismen auch die Bildung andersartiger Eisensulfidschichten mit verschiedener Schutzwirkung diskutiert werden.
    Additional Material: 10 Ill.
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    URL: http://dx.doi.org/10.1002/maco.19770280902
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    Ursachen der Metallkorrosion unter Einwirkung von Elektroisolierstoffen (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 610-618 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Causes of metal corrosion under the action of electroinsulation materials - A novel test methodA new method is proposed for the study of corrosive influences of insulating plastics on metals in contact with such materinls. This method enables during one experiment qualitative as well as quantitative results to be obtained; such results could be obtained so far only by using two different methods, the visual observation and the mechanical strength testing. The corrosive influence of the insulating plastics has been studied on copper, aluminium and brass. In this context the extent of corrosion of these metals has been determined as a function of invidual test pammeters such as duration of test, applied current, temperature moisture content. Control tests made with some types of organic plastics have revealed that the new method is quite suitable.
    Notes: Eine neues Verfahren wird vorgeschlagen zur Untersuchung des korrosiven Einflusses organischer lsolierkunststoffe auf Metalle, die mit ihnen in Berührung kommen. Bei Anwendung dieses Verfahrens kann man während eines Versuches sowohl qualitative, wie auch quantitative Ergebnisse erhalten, die man bisher mit hilfe zweier verschiedener Methoden - der visuellen und der Festigkeitsprüfmethode - erchielt. Der korrosive Einfluß der Isolierkunststoffe auf kupfer, Aluminium und Messing ist untersucht worden. Die Abhängig-keit der korrosionsgröße dieser metalle von der Veränderung der einzelnen Versuchsparameter, wie Einwirkungszeit, Gliechstromspannung, Temperature, Feuchtigkeit, wurde fesgestellt. Kontrollprüfungen, die an einigen Sorten organischer kunststoffe angestellt wurden, haben eine gute Suszetibilität des neubearbeiteten verfahrens erwiesen.
    Additional Material: 13 Ill.
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    URL: http://dx.doi.org/10.1002/maco.19770280905
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    Aus Industrie und Technik (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 845-848 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281208
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    Corrosion and Inhibition Tests on copper-base alloy tubes in flowing conditions (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 834-837 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Korrosions- und Inhibierungsversuche mit Rohren aus Kupferleigierungen in strömenden MedienZur Untersuchung des Korrosionsverhaltens von Rohren aus CuZn15, CuZn29Sn1 und CuZn22Al2 In strömendem synthetischem Meerwasser wurde eine Umlaufapparatur konstruiert; mit dieser können Elektrodenpotentialmessungen durchgeführt und der Polarisationswiderstand der als Elektroden dienenden Rohre aufgenommen werden. Außerdem konnten mit Hilfe einer Impulstechnik Photopotentiale ermittelt werden, wodurch die Veränderung der oxidishcen oder sonstigen Korrosinsproduktschichten auf der Oberfläche unter vershciedenen Bedingungen in situ beobachtet werden konnten. In der vorliegenden Arbeit werden die folgenden Ergebnisse erörtert: a)Wirkung von Bensimidazol-2thiol als organischer Inhibitorb)Einfluß des Oberflächenzustands von metallen auf die Wirkung des inhibitorsc)Einfluß von Verunteinigungen (Sulfid) oder einer Vorbehandlung der Oberfläche (Filmbildung) auf die Wirksamkeit des Inhibitorsd)Möglichkeit der Korrosionsüberwachung durch lineare Polarisationsmessungen
    Notes: A corrosion loop has been asembled to study the behaviour of CuZn15, CuZn29Sn1, CuZn22Al2 tubes in flowing synthetic seawater. The apparatus allowed to carry out electrode potential measurements and to record the polarization resistance on tube electrodes. Moreover, by using a pulse technique of photopotential determination, it was possible to observe “in situ” the modification of surface layers of oxides or of corrosion products in the various experimental conditions. The paper discusses some results concerning: a)the action of thebenzimidazole-2-thiol organic inhibitor;b)the influence of the surface state of the metallic material on the action of the inhibitor;c)the influence of polluting agent (S2-) or a prefilming treatment on the inhibitor efficiency;d)the possibility of corrosion monitoring by linear polarization measurements.
    Additional Material: 6 Ill.
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    URL: http://dx.doi.org/10.1002/maco.19770281206
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    Patentschau (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 855-868 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281210
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    Arbeiten über mehrere Werkstoffgruppen (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 870-871 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281212
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    Eisenmetalle (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 871-878 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281213
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    Korrosions- und Werkstoffprüfung (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 869-870 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281211
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    Nichteisenmetalle (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 878-882 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281214
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    Nichtmetallische anorganische Werkstoffe (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 882-882 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281215
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    Kunststoffe und andere organische Werkstoffe (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 882-883 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281216
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    Metallische Überzüge (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 883-884 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281217
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    Nichtmetallische anorganische Überzüge (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 884-885 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19770281218
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    Organische Überzüge (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 885-887 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281219
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    Elektrochemische Baulemente. Von A. F. bogenschütz und W. Krusemark., Ln. DM 145,- (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 887-887 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281220
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    Stähle und ihre Wärmebehandlug, Werkstoffprüfung. Herausg.:Institut für Fachschulwesen der DDR. 2. stark überarb. Aufl. (1977), 214 S., 133 Abb., 14 Tabellen und 20 Anlagen. VEB Deutscher Verlag für Grundstoffindustrie, Leipzig - geb.: 18,-DM. (Bestell-Nr.:540761 3) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 887-887 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281221
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    Introduction to corrosion prevention and control for engineers. (ISBN 90 298 0600 1) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 887-887 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281223
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    Handbuch für fluidische Meßtechnik. Von N. Mayer und C. Rohrbach. 615 S., 543 Abb. und 25 Tab. (16,8 × 24 cm)(1977). VDI- Verlag GmbH, Düsseldorf-La.:168,-DM (f. VDI-Mitglieder 10% Nachlaß) (ISBN 3-18-400278-0) (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 887-887 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281222
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    Personalnachrichten (1977)
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    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 888-888 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770281225
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    Kerbspannungen an Ausschnitten und Einschlüssen. Von D. Radaj und G. Schilberth. Fachbuchreihe „Schweißtechnik“, Band 69. 217 S., Format 24 × 27,5 cm, Leinen. Deutscher Verlag für Schweißtechnik, Düsseldorf 1977. DM 98,- (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 887-888 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19770281224
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    Kurzreferate zu den Originalarbeiten (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. LXIX 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    URL: http://dx.doi.org/10.1002/maco.19770281226
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    Masthead (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981) 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    URL: http://dx.doi.org/10.1002/maco.19810320101
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    The oxidation of 18/8 type stainless steel in high pressure CO2/2% CO (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 1-7 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Die Oxidation von 18/8 Stählen in Kohlendioxid + 2% Kohlenmonoxid bei hohem DruckDie Oxidation verschiedener 18/8 Stähle in Gemischen aus Kohlendioxid und 2% Kohlenmonoxid wurde im Temperaturbereich 550 bis 650°C durch intermittierende Messung der Gewichtszunahme, metallographische Untersuchung, Fraktographie und Rasterelektronenmikroskopie verfolgt. Schon in einem frühen Oxidationsstadium entsteht eine Duplex-Zunderschicht. Die Gewichtszunahme/Zeit-Kurven zeigen zwei Prozeßstufen, und zwar ein Anfangsstadium, das sich exponentiell dem zweiten langsameren Stadium annähert. Die Geschwindigkeit der Duplex-Zunderbildung zeigte nicht die übliche Temperaturabhängigkeit; indessen wurde bei etwa 600°C ein Maximum der Geschwindigkeit festgestellt. Die sekundären Verzunderungsgeschwindigkeiten waren bei 650 und 550°C deutlich zu erkennen und lagen bei der niedrigeren Temperatur höher. Im Zunder traten verschiedene Spinelle auf. Die erhaltenen Ergebnisse werden mit der Annahme gedeutet, daß Kationendiffusion durch verschiedene innere Spinelle der geschwindigkeitsbestimmende Schritt ist.
    Notes: The oxidation of a variety of 18/8 stainless steels in high pressure CO2/2% CO has been followed in the temperature range 550-650°C using intermittent weight gain measurement metallography, fractography and scanning electron microscopy. Duplex scales formed at an early stage of oxidation. The weight gain curves were analysed in terms of a two stage process, the initial stage exponentially approaching a slower secondary stage. The primary rate of duplex scale formation did not show the usual temperature dependence. Rather a maximum in the rate was observed at ∼600°C. Secondary rates were well established at 650°C and 550°C the secondary rate at 550°C, however, being higher than that at 650°C. Various spinels occurred and the results are explained in terms of the rate controlling process being cation diffusion through different inner spinels.
    Additional Material: 8 Ill.
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    Inhibitors of passive corrosion - application of a new test with thin oxide films (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 13-18 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Inhibitoren der passiven Korrosion - Anwendung einer neuen Untersuchungsmethode mit dünnen OxidschichtenEine neue Methode, Inhibitoren der passiven Korrosion zu untersuchen, wird vorgestellt. Potentiodynamische Stromspannungs- und Kapazitätskurven wurden im System Au/Fe2+ in Gegenwart von Inhibitoren aufgenommen. Veränderungen bei der Bildung und Reduktion des γ-FeOOH, des Goldoxids and bei der Sauerstoffentwicklung ermöglichen Aussagen über die Intensität und den Mechanismus der Inhibition.Vorzugsweise warden organische Stickstoffverbindungen untersucht. Pentylamin war ohne Einfluß auf oxidbedeckte Elektroden, während Benzimidazol und seine Derivate starke Inhibitionswirkung zeigten. Die Kapazitätsdaten lassen sich als Reihenschaltung der Kapazitäten von Oxid und Inhibitorschicht deuten. Die Inhibitionswirkung beruht wahrscheinlich auf einer Adsorption des Inhibitors an der Oxidoberfläche. Diese Adsorptionsschicht behindert den Durchtritt hydratisierter Ionen, ist aber ohne Einfluß auf Reaktionen adsorbierter Wassermoleküle, wie z. B. die Sauerstoffentwicklung.Die Anwendbarkeit der Untersuchungsmethode auf andere Systeme wird diskutiert.
    Notes: A new method to test the inhibitors of passive corrosion is presented. Potentiodynamic i(ε)- and C(ε)-curves are recorded in the system Au/Fe2+, inhibitor. The investigations of formation and reduction of the FeOOH-layer, of gold oxide and the oxygen evolution allow estimations of the inhibition efficiency and mechanism.Some organic nitrogencompounds are tested. Pentylamine is ineffective for oxide surfaces, but benzimidazole and its derivates show inhibition effects. The capacity data can be evaluated using a condensor model of a connection in series of the oxide and the inhibitor layer. The detailed discussion shows that adsorption at the film surface is most probable. Such layers inhibite the transfer of hydrated ions, but reactions of water molecules are not influenced, e.g. oxygen evolution.The applicability of this method to other systems is discussed.
    Additional Material: 8 Ill.
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    URL: http://dx.doi.org/10.1002/maco.19810320104
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    Influence of the material properties upon liquid cavitation resistance (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 7-12 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Einfluß von Werkstoffeigenschaften auf die Beständigkeit gegen Kavitation in FlüssigkeitenDie Wirkung der Kavitation in Flüssigkeiten auf die Bauteile von Strömungsmaschinen kann entweder durch aktive oder durch passive Maßnahmen ausgeschaltet werden. In der vorliegenden Arbeit werden Möglichkeiten zur Verringerung der Kavitationswirkung auf Werkstoffe mit Hilfe von passiven Methoden beschrieben. Dabei werden verschiedene Methoden zur Beschreibung des Erosionsverschleißes in Abhängigkeit von den Werkstoffeigenschaften erörtert. Anschließend wird ein mathematisches Modell entwickelt, bei welchem der Einfluß wichtiger mechanischer Eigenschaften auf das Erosionsverhalten gezeigt wird. Aus dem mathematischen Modell läßt sich die Beziehung zwischen der Kavitationsbeständigkeit eines Werkstoffs und seinen mechanischen Eigenschaften ableiten. Der Einfluß wichtiger Materialeigenschaften auf die Beständigkeit gegen Kavitation in Flüssigkeiten wird anhand dieses Modells erörtert.
    Notes: The influence of the liquid cavitation on the elements of fluid-flow machines can be removed in either an active or passive way. In this paper possibilities of reduction of the cavitation effect on the constructional materials in a passive way are described. Different methods of the material erosion wear description, depending on its properties, are discussed. A mathematical model, regarding the principal mechanical features of the material, is proposed. The mathematical model shows the relation between cavitation resistance of the material and its properties. The effect of principal properties of the material on its resistance on the liquid cavitation influence based on this model is discussed.
    Additional Material: 12 Ill.
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    URL: http://dx.doi.org/10.1002/maco.19810320103
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    Ergebnisse des Forschungs- und Entwicklungsprogramms „Korrosion und Korrosionsschutz“ (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 31-32 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320106
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    Einfluß von Phosphaten und/oder Silikaten auf die durch Kupferionen ausgelöste Lochkorrosion in verzinkten Warmwasserrohren (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 19-30 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Influence of phosphates and/or silicates on copper ion induced pitting of galvanized hot water tubingIn connection with studies on the copper-induced pitting of galvanized steel tubes the inhibition by phosphates and/or silicates should be investigated. The investigations were carried out in Berlin tap water, at temperatures of 65°C. Inhibitors used were o-phosphate, p-phosphate, combinations of o/p-phosphate and phosphate/silicate as well as two silicates.All these inhibitors reduced the general corrosion of galvanized steel and copper. Best results were obtained with p-phosphate. Protective layers on both metals were produced not before a time of 150-200 days.Number and depth of pits were positively influenced by nearly all the inhibitors used. But only the combination phosphate/silicate lead to a complete prevention from copper-induced pitting. O-phosphate showed the lowest efficiency.These investigations once again pointed to the importance of the phase boundaries air/water/tube or deposits/water/tube as nuclei for pitting in tubes.A second layer containing calcium and inhibitors was formed on the primary layer of zinc corrosion products. These secondary layers are responsible for corrosion protection by the inhibitors.
    Notes: Anschließend an Untersuchungen zum kupferinduzierten Lochfraß in verzinkten Rohren sollte geprüft werden, ob mittels der gesetzlich für die Nachaufbereitung von Trinkwässern zugelassenen Inhibitoren Phosphat und/oder Silikat eine positive Beeinflussung dieser in Mischinstallationen auftretenden Korrosionserscheinungen möglich ist. Die Versuche sind in Berliner Leitungswasser bei 65°C in einer Umlaufapparatur über eine Laufzeit von zwei Jahren durchgeführt worden. Dosiert wurden o-Phosphat, p-Phosphat, Mischungen aus o/p-Phosphat, zwei Silikate als Natronwasserglas sowie eine Mischung aus Silikat/Phosphat.Unter den gewählten Versuchsbedingungen wurde mit allen Inhibitoren eine Inhibition der Flächenkorrosion bei verzinktem Stahlrohr und Kupfer erzielt. Die besten Ergebnisse wurden mit Polyphosphat erreicht. Bei verzinktem Stahl und z. T. auch bei Kupfer bilden sich Schutzschichten erst nach 150-200 Tagen.Die kupferinduzierte Lochkorrosion wird zwar von den meisten Inhibitoren bezüglich Lochzahl und -tiefe günstig beeinflußt, eine vollständige Unterdrückung gelingt jedoch nur mit dem Gemisch Silikat/Phosphat. Orthophosphat hat die geringste Wirkung. Auch diese Arbeit zeigt die Bedeutung von Phasengrenzen wie Luft/Wasser/Rohr oder Ablagerungen/Wasser/Rohr als Keimbildner der Lochkorrosion.Inhibitoren und Calcium bilden auf der primären Deckschicht aus Zinkkorrosionsprodukten eine zweite, darüberliegende Schicht, deren Ausbildung für die Schutzwirkung des Inhibitors verantwortlich ist.Die Untersuchungen haben außerdem gezeigt, wie bedeutsam eine sachkundige und regelmäßige Wartung für die Funktionsfähigkeit einer Dosieranlage ist.
    Additional Material: 21 Ill.
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    Umschau (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 38-55 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 6 Ill.
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    URL: http://dx.doi.org/10.1002/maco.19810320109
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    DIN 50 900, Begriffe der Korrosion, Teil 1: Allgemeine Begriffe. Grundlagen und Ziele der Begriffsnorm - Ein Rückblick nach fünfjährigem Bestehen dieser Norm (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 33-36 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320107
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    Modern X-ray analysis on single crystals. Von P. Luger XIV, 312 S. mit zahlr. Abb., Verlag Walter de Gruyter, Berlin-New York, 1980. 96,- DM. ISBN 3-11-006830-3 (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 56-56 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320110
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    Aus Industrie und Technik (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 37-37 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320108
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    Personalnachrichten (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 56-56 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320112
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    Oberflächenschutz mit organischen Werkstoffen im Behälter-, Apparate- und Rohrleitungsbau. Herausgegeben vom Verein Deutscher Ingenieure, VDI-Gesellschaft Kunststofftechnik. Etwa 200 S. Reihe „Ingenieurwissen“, DIN A 5. Kunststoffeinband. 75,- DM; VDI- Verlag GmbH, Verlag des Vereins Deutscher Ingenieure - Düsseldorf 1980 (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 56-56 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320111
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    Corrosion and materials testing (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R1 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320113
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    Ferrous metals (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R6 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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    URL: http://dx.doi.org/10.1002/maco.19810320115
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    Comprehensive papers covering several materials groups (1981)
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    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R4 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320114
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    Non-ferrous metals (1981)
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    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R15 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320116
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    Non-metallic inorganic materials (1981)
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    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R23 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/maco.19810320117
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    Metal coatings (1981)
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    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R24 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320118
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    Masthead (1981)
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    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981) 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320201
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    Non-metallic inorganic coatings (1981)
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    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R26 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320119
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    Das Korrosionsverhalten von Tantal in heißer Salzsäure (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 57-65 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Corrosion behaviour of tantalum in hot hydrochloric acidOn account of its excellent resistance to corrosion and the high thermal conductivity tantalum is used in the chemical engineering industry. Used in hydrochloric acid at higher pressure and temperatures up to 200 °C localized embrittlements appeared, caused by a local increase of the hydrogen content. Loading tests in streaming hydrogen, by cathodic loading in different hydrochloric acid concentrations and different current densities as well as in the autoclave at 180 °C and hydrochloric acid concentrations up to 36% did not result in significant differences at electron beam melted or sintered material with different heat-treatments. Welding scams behaved analogous to the sheat-material, too. The electric conductivity shows a distinct dependance on the amount of hydrogen dissolved in the tantalum. To control a plant such measurements can be done on different tantalum parts to determine the amount of dissolved hydrogen.
    Notes: Tantal wird wegen seiner ausgezeichneten Korrosionsbeständigkeit und der hohen Wärmeleitfähigkeit im Chemieanlagenbau eingesetzt. Beim Einsatz in hochkonzentrierter Salzsäure bei höherem Druck und Temperaturen bis zu 200 °C zeigten sich örtlich begrenzte Versprödungserscheinungen, deren Ursache eine lokale Wasserstoffaufnahme war. Beladungsversuche im Wasserstoffstrom, durch kathodische Beladung in unterschiedlichen Salzsäurekonzentrationen und unterschiedlichen Stromdichten sowie im Autoklaven bei 180 °C und Salzsäurekonzentrationen bis 36% ergaben keine signifikanten Unterschiede bei elektronenstrahlgeschrnolzenem oder gesintertern Material unterschiedlicher Wärmebehandlung. Auch Schweißnähte verhielten sich analog zum Grundmaterial. Die elektrische Leitfähigkeit zeigt eine deutliche Abhängigkeit von der aufgenommenen Wasserstoffmenge. Zur Überwachung von Anlagen sind solche Messungen auch an Anlageteilen bei Stillstand der Anlage durchführbar.
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    URL: http://dx.doi.org/10.1002/maco.19810320202
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    Untersuchungen zum Einfluß des Stahlgefüges auf die stationäre Wasserstoffpermeation (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 66-72 
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    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations on the influence of microstructure of steels on steady state hydrogen permeationThe effect of microstructure of iron and of a low alloyed steel on steady state hydrogen permeation is studied by means of the electrochemical permeation method adapted to hydrogen gas phase charching at pH2 = 1 bar in the temperature range of 15 to 80 °C. In case of pure annealed iron the permeation coefficient is given by \documentclass{article}\pagestyle{empty}\begin{document}$$ \phi ^0 _{\rm H} ({\rm T}) = (2.57 \pm 0.48)10^{- 7} \exp \{- (34.32 \pm 0.42){\rm kJ/mol} \cdot {\rm RT}\} \,({\rm mol}\,{\rm H/cm} \cdot {\rm s} \cdot {\rm bar}^{{{\rm 1} \mathord{\left/ {\vphantom {{\rm 1} 2}} \right. \kern-\nulldelimiterspace} 2}}) $$\end{document} Impurities, oxide inclusions and a high density of lattice defects do not affect steady state hydrogen permeation remarkably. In steel specimens of different microstructure (pearlitic, martensitic, bainitic) hydrogen permeability is decreased by a factor 4 to 8. Carbide precipitates in tempered martensite do not change the permeation coefficient. Also cold deformation by rolling to about 15% shows no effect on steady state permeation. Cold rolling to about 40% or higher degrees decreases the steady state hydrogen flux considerably. In all cases, no essential change in temperature dependence is observed.
    Notes: Der Einfluß des Gefügezustandes des Eisens und eines niedriglegierten Stahls auf den stationären Wasserstoffdurchtritt wird mit Hilfe der elektrochemischen Permeationsmethode unter Wasserstoffaufnahme aus der Gasphase hci pH2 = 1 bar im Temperaturbereich von 15 bis 80 °C untersucht. Der Permeationskoeffizient des Wasserstoffs für reines rekristallisiertes Eisen läßt sich durch \documentclass{article}\pagestyle{empty}\begin{document}$$ \phi ^0 _{\rm H} ({\rm T}) = (2,57 \pm 0,48)10^{- 7} \exp \{- (34,32 \pm 0,42){\rm kJ/mol} \cdot {\rm RT}\} \,({\rm mol}\,{\rm H/cm} \cdot {\rm s} \cdot {\rm bar}^{{{\rm 1} \mathord{\left/ {\vphantom {{\rm 1} 2}} \right. \kern-\nulldelimiterspace} 2}}) $$\end{document} beschreiben. Verunreinigungen durch Fremdatome und oxidische Einschlüsse sowie eine hohe Gitterfehlerdichte haben im Eisen keinen merklichen Einfluß auf die stationäre Wasserstoffpermeation. Beim niedriglegierten Stahl liegt der Permeationskoeffizient je nach Gefügezustand (Perlit, Martensit, Bainit) urn den Faktor 4 bis 8 niedriger als beim Eisen. Karbidausscheidungen im angelassenen Martensit verändern die stationäre Permeationsstromdichte nicht. Eine geringe Kaltverformung urn 15% verursacht ebenfalls keine Änderung des stationären Permeationsstromes. Bei Verformungsgraden größer 40% wird der Wasserstoffdurchtritt stärker behindert. Eine deutliche Änderung der Temperaturabhängigkeit ist in allen Fällen nicht zu erkennen.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320203
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    Untersuchungen zum Einfluß des Stahlgefüges auf die instationäre Wasserstoffpermeation (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 73-78 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations on the influence of microstructure of steels on unsteady state hydrogen permeationThe effect of microstructure of iron and a low alloyed steel on hydrogen permeation at room temperature is studied by means of the electrochemical permeation method. Hydrogen transport through these materials during charging or effusion processes is affected by microstructural heterogeneities and hydrogen content. The diffusivity as a function of the state of the materials ranges over about five orders of magnitude. In course of non-steady state diffusion dislocations and interfaces decrease the effective diffusivity to values between 10-7 and 10-9 cm2/s. At steady state permeation the diffusivity reaches the values of 10-5 to 10-4 cm2/s.
    Notes: Der Einfluß des Gefügezustandes des Eisens und eines niedriglegierten Stahles auf die Wasserstoffpermeation bei Raumtemperatur wird mit Hilfe der elektrochemischen Permeationsmethode untersucht. Die Transportvorgänge im Werkstoff während der Wasserstoffbeladung oder -effusion werden durch die Gefügeelemente und den Wasserstoffgehalt beeinflußt. Die in Abhängigkeit vom Werkstoffzustand ermittelten Diffusionskoeffizienten überstreichen bis zu fünf Zehnerpotenzen. Bei instationärer Diffusion bewirken Versetzungen und Phasengrenzen einen Abfall des effektiven Diffusionskoeffizienten auf Werte zwischen 10-7 und 10-9 cm2/s. Bei stationärer Permeation werden Diffusionskoeffizienten zwischen 10-5 and 10-4 cm2/s erreicht.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320204
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    Umschau (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 104-112 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320208
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  • 95
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    Aus Industrie und Technik (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 92-104 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320207
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  • 96
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    Langzeit-Korrosionsuntersuchungen an austenitischen Stählen im Hochdruckteil einer Harnstoffanlage (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 85-91 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Longterm corrosion field tests with austenitic steels in the high pressure parts of a urea plantIn view of the conditions encountered in urea manufacture, in particular in the high pressure section the corrosion resistance is investigated using various austenitic steels immersed in reaction mixtures typical of urea manufacture. The specimens were placed in an operating plant; different test durations (total 13 000 hours) enable the time dependence of the attack to be assessed. The steels tested were CrNi steels with nitrogen and 17.45-19.8% Cr and 10.3-12% Ni, CrNiMo steels, some of them with Ti and Cu addition and 17% Cr and 20 and 13.8% Ni, respectively. According to the results the corrosion resistance increases with the chromium level while ferrite in particular with longer test durations has a pronounced negative effect. A suitable screening test for corrosion resistance under the conditions of urea manufacture is testing in boiling nitric acid.
    Notes: Im Hinblick auf die Verhältnisse in Harnstoffanlagen, vor allem für den Hochdruckteil, wird die Beständigkeit verschiedener austenitischer Stäble in den bei der Harnstoffsynthese auftretenden Reaktionsgemischen untersucht. Die Proben wurden dazu in Betriebsanlagen eingelegt, wobei durch unterschiedliche Beanspruchungsdauer (Gesamtdauer 13 000 Stunden) Aussagen über den zeitlichen Verlauf des Angriffs möglich waren. Bei den Stählen handelte es sich um CrNi-Stähle mit Stickstoffzusatz und 17,45 bis 19,8% Chrom sowie 10,3 bis 12% Nickel und um CrNiMo-Stähle, teilweise mit Stickstoffzusatz und 15 bis 19,7% Chrom and 11,2 bis 6,5% Nickel und schließlich um CrNiMo-Stähle mit Ti- und Cu-Zusatz sowie 17% Cr und 20 bzw. 13,8% Nickel. Aufgrund der Ergebnisse nimmt die Korrosionsbeständigkeit mit dem Chromgehalt zu, während Ferrit, besonders bei längerer Versuchsdauer, deutlich negative Wirkungen hat. Als Vorprüfung auf Beständigkeit unter den Bedingungen der Harnstoffherstellung eignet sich die Prüfung in siedender Salpetersäure.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320206
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  • 97
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    Corrosion and materials testing (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R27 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320210
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  • 98
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    Technisch-wirtschaftliche Auswertung von Korrosionsverlusten an Stahlkonstruktionen in aggressiven Atmosphären (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 79-85 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Technical and economical evaluation of corrosion losses for steel structures in aggressive atmospheresThe paper contains a comparative survey of specific costs for procurement and maintenance of light to medium heavy steel structures protected by various coating systems (e.g. hot galvanizing with top coat renewed at regular intervals, sprayed aluminium coating with sealing coat). As an alternative the use of weathering steel is considered. In addition optimum protection variants are considered for atmospheres of defined aggressivities.
    Notes: Die Arbeit enthält einen Vergleich der spezifischen Kosten für die Anschaffung und die Instandhaltung von Stahlkonstruktionen (leicht bis mittelschwer), die mit verschiedenen Korrosionsschutzsystemen geschützt sind (z. B. Anstrichsysteme, Feuerverzinkung mit Deckanstrich, der in regelmäßigen Abständen erneuert wird, Aluminiumspritzüberzug mit Verdichtungsanstrich). Dazu wird als Alternative die Verwendung von langsamrostendem Stahl berücksichtigt. Ebenso wird auf optimale Schutzvarianten für Atmosphären definierter Aggressivität eingegangen.
    Additional Material: 14 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320205
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    Spritzgießen - Verfahrensablauf, Verfahrensparameter, Prozeßführung. Bearb. von R. Sarholz mit Unterstützung von U. Beese und Mitarb. Hrsgg. vom Institut für Kunststoffverarbeitung an der RWTH Aachen, Leitung Prof. Dr.-Ing. G. Menges, in Zusammenarbeit mit 17 Firmen. 264 S., 186 Abb., 14 Tab., Carl Hanser Verlag, München, Wien 1979. Geb. DM 52,-, ISBN 3-446-12939-1 (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. 112-112 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320209
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  • 100
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    Comprehensive papers covering several materials groups (1981)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 32 (1981), S. R28 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19810320211
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