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  • Chemistry  (1,899)
  • 1990-1994
  • 1950-1954  (1,899)
  • 1951  (1,899)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 235-235 
    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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  • 2
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 234-234 
    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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  • 3
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 241-243 
    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: Evans-cells in different aeration with oxygenAs it is difficult to adjust in a reproducible manner the current density in oxygen concentration cells  -  this also applies to other concentration cells of an electrone-receiver type  -  those test conditions have been closely examined which must be kept constant in order to enable a reproducible work.Though the quantity of oxygen dissolved in the electrolyte is in all degrees of aeration equally high, the current density varied very much. It was found that the cause of this fact is a stirring effect caused by the aeration. In the moved electrolyte more oxygen reacts electrothemically at the cathode than in the static electrolyte.
    Notes: Da die Stromdichte in Sauerstoffkonzentrationselementen (das gilt auch für andere Elektronennehmer-Konzentrationselemente) schwer reproduzierbar einzustellen ist, wurden jene Versuchsbedingungen näher untersucht, die konstant gehalten werden müssen, damit ein reproduzierbares Arbeiten möglich ist.Obwohl die Menge des im Elektrolyten gelosten Sauerstoffes bei allen Begasungsstärken gleich hoch ist, waren die Stromdichten sehr unterschiedlich. Als Ursache dafür wurde ein durch die Begasung hervorgerufener Rühreffekt erkannt. In dem bewegten Elektrolyten wird mehr Sauerstoff an der Kathode elektrochemisch umgesetzt als im ruhenden Elektrolyten.
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  • 4
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 249-258 
    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: Materials of construction for the chemical industry 2nd part: Non-ferrous metalsContinuing the first part of the survey on materials of construction for the chemical industry the following matters are dealt with: Corrosion of cupper, aluminium, nickel, titanium, zirconium, tantalum, precious metals as well as their possibilities of usage in the chemical industry.
    Notes: In Fortsetzung des 1. Teiles der Übersicht über die Konstruktionswerkstoffe für die chemische Industrie werden Korrosionsverhalten von Kupfer, Aluminium, Nickel, Titan, Zirkon, Tantal und Edelmetallen sowie ihre Einsatzmöglichkeiten in der chemischen Industrie behandelt.
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  • 5
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 282-286 
    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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  • 6
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 286-286 
    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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  • 7
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 287-287 
    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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  • 8
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 287-287 
    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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  • 9
    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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  • 10
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 287-288 
    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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  • 11
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 289-292 
    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: The Passivating of Tin-platePassivating solutions are examined for hot-dipped and electrolytically coated tin-plate for the protection against sulphur compounds (food), oxydation in heating and against atmospheric corrosion. Solutions of 0,1-5% of potassium permanganate, potassium dichromate and diluted sulphuric acid with additons of chromate and inhibitors have been employed. The solutions of chromate had a favourable effect only when additons of wetting mediums or phosphates were made. Tin-plate thus treated were resistant for several hours against hot water containing hydrogen sulphide without discolouring and without corrosion starting from the pores. Even the heating of the treated tin-plate up to a temperature of 200° C did not result in any oxydation.
    Notes: Es werden Passivierungslösungen für feuerverzinntes und elektrolytisch verzinntes Weißblech zum Schutz gegen den Angriff von Schwefelverbindungen (Nahrungsmittel) Oxydation beim Erwärmen und gegen die atmosphärische Korrosion untersucht. Verwendet wurden 0,1 bis 5 %ige Lösungen von Kaliumpermanganat, Kaliumdichromat und verdünnte Schwefelsäure mit Zusätzen von Chromaten und Inhibitoren. Die Chromatlösungen zeigten nur dann eine günstige Wirkung, wenn noch Zusätze gemacht wurden. Verzinnte Bleche, die so behandelt wurden, hielten einen mehrstündigen Angriff durch heißes schwefelwasserstoffhaltiges Wasser stand, ohne sich zu verfärben und ohne daß von den Poren aus eine Korrosion stattfand. Auch eine Erwärmung der behandelten Bleche bis auf 200° C führte zu keiner Oxydation.
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  • 12
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 296-298 
    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: Rhenium and its to-day's usage in technicRhenium was discovered 26 years ago. It might be the rarest of all stable metals. Only in a few metallurgical products it is enriched to such an extent that its preparation is worthwhile. Owing to the physical and chemical properties of the element, which is nearly related to platinum metals, it could be predicted that it would be suitable for many technical usages. The molten Re-metal has a great hardness, its alloys are also hard and without any brittleness, mostly corrosion without any brittleness, mostly corrosion resistant. These valuable properties have already been practically exploited. In the thermoelements with platinum metals Rhenium has unique properties. The catalytic properties of Rhenium are of particular interest.
    Notes: Das Rhenium wurde vor 26 Jahren entdeckt. Es dürfte das seltenste aller stabilen Metalle sein. Nur in wenigen Hüttenprodukten und Erzen ist es soweit angereichert, daß seine Darstellung lohnt. Die physikalischen und chemischen Eigenschaften des Elementes, das den Platinmetallen nahesteht, ließen voraussehen, daß es sich für zahlreiche technische Anwendungen eignen würde. Das geschmolzene Re-Metall besitzt eine große Härte, seine Legierungen sind ebenfalls hart und ohne Sprödigkeit, meist auch korrosionsbeständig. Diese technisch wertvollen Eigenschaften haben in vielen Fällen bereits praktische Verwertung gefunden. In den Thermoketten mit Platin-metallen besitzt Rhenium singuläre Eigenschaften. Von besonderem Interesse sind die katalytischen Eigenschaften des Rheniums.
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  • 13
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 359-359 
    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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  • 14
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 315-316 
    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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  • 15
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 334-339 
    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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  • 16
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 321-334 
    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: Titan and Titan AlloysAt first the raw material basis and the producing of the titan metal from ore are described. In the following the physical and technological properties are discussed. The basis of the preparation of suitable titan alloys with other metals and the influence of non-metallic elements on titan metal are explained. Furthermore, the mechanic properties of binary, ternary and quarternary alloys are described. The heat resistance of some titan alloys is also dealt with. Will be continued.
    Notes: Zunächst werden die Rohstoffgrundlage und die Gewinnung des Titanmetalles aus dem Erz geschildert. Anschließend werden die physikalischen und technologischen Eigenschaften wiedergegeben. Die Grundlagen zur Herstellung brauchbarer Legierungen mit anderen Metallen und der Einfluß nichtmetallischer Legierungs-elemente auf Titan werden klargelegt. Weiterhin werden die mechanischen Eigenschaften von binären, ternären und quarternären Legierungen besprochen. Auf die Hitzebeständigkeit einiger Titanlegierungen wird gleichfalls eingegangen. Fortsetzung folgt.
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  • 17
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 409-414 
    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: Steel alloys for manufacturing sheet and form glassThe permanent contact of the viscous glass matter with the forming tools, that are bending- and transporting-rolls for sheet glass-production, matrice-parts for manufacturing form glass, requires the application of alloyed materials of construction in the production of high-class glass qualities. Determining for the selection of the materials are the temperature stressing and the corrosion attack by the furnace gases and by the alkaline substances diffusing from the glass matter. Only for matt glass resp. ornamental glass unalloyed materials can be used.In inland and abroad therefore in the glass industry austenitic Cr-Ni-steels with 20 - 65% Ni are preponderatingly customary. Cr-Si- and Cr-Si-Al-steels with higher cinder- and oxydationrestistance than Cr-Ni-steels are scarcely applied. Examinations in practice and in experiments show the possibility to use steel poor resp. free in Ni. Supposition are high heat proof quality, thermal conductivity and insensibility against temperature variations as well as homogeneous and finegrained structure, because every unevenness of structure is sketched as defect on the glass surface.Proceeding from this aspect the influence of the base-alloys and of the structure are discussed fully and propositions are given for the selection of materials of construction.
    Notes: Die ständige Berührung der zähflüssigen Glasmasse mit den Formwerkzeugen, und zwar den Biege- und Transportwalzen bei der Tafelgas-, den Matrizenteilen bei der Formglasherstellung, erfordert den Einsatz legierter Werkstoffe bei der Fertigung hochwertiger Glassorten. Maßgebend für die Auswahl der Werkstoffe sind die Temperaturbeanspruchung und der Korrosionsangriff durch die Ofengase und den aus der Glasmasse diffundierenden alkalischen Bestandteilen. Nur bei Matt- bzw. Ornamentglas können unlegierte Werkstoffe Anwendung finden.Im In- und Ausland sind deshalb in der Glasindustrie überwiegend austenitische Cr-Ni-Stähle mit 20 - 65% Ni gebräuchlich. Cr-Si- und Cr-Si-Al-Stähle mit Höherer Zunder- und Oxydationsbeständigkeit gegenüber Cr-Ni-Stählen werden kaum verwendet. Überprüfungen betrieblicher und versuchsmäßiger Art lassen aber den Einsatz Ni-armer bzw. Ni-freier Stähle durchaus möglich erscheinen. Voraussetzung sind große Wärmebeständigkeit, Wärmeleitfähigkeit und Unempfindlichkeit gegen Temperaturwechsel sowie einheitliche und feinkörnige Gefügebeschaftfenheit, da jede Ungleichheit des Gefüges sich als Fehler auf der Glasoberfläche abzeichnet. Von diesen Gesichtspunkt aus werden der Einfluß der Grundlegierungen sowie des Gefüges eingehend erörtert und Vorschläge für die Werktoffauswahl gegeben.
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  • 18
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 406-406 
    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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  • 19
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 404-405 
    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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  • 20
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 405-406 
    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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  • 21
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 406-407 
    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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  • 22
    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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  • 23
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 439-439 
    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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  • 24
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 441-444 
    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: Variation of corrosions by wetting agents. II. The influence of non-ionogen wetting agentsSurface-active substance are able to change the corroding effect of tap water on unalloyed steel in a favourable manner, as far as pitting is avoided and only removing tuberculation takes place. Non-ionogen wetting agents are more effective hereby than anion-active ones. A higher decreasing of the surface tension of the water by addition of over 4%0 of the wetting agent raises the efficacy. The chemical constitution of the used surface-active substances, however, seems to be of essential importance.
    Notes: Oberflächenaktive Stoffe können die korrodierende Wirkung von Leitungswasser auf unlegiertem Stahl insofern günstig verändern, als Lochkorrosion vermieden wird und nur noch abtragende Narbenkorrosion auftritt. Nichtionogene Netzmittel sind dabei wirksamer als anionaktive. Eine stärkere Erniedrigung der Oberflächenspannung des Wasser durch Zusatz von je 4%0 des Netzmittels erhöht die Wirkung. Die chemische Konstitution der verwendeten oberflächenaktiven Körper scheint jedoch von wesentlicher Bedeutung zu sein.
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  • 25
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 465-468 
    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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  • 26
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 461-464 
    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 state of surface on the endurance bending strengthResults of endurance fatigue tests taken from literature are comparable,  -  as well known  - , only in a limited degree. One of the reasons for this disadvantageous limiting in the evaluation is to be found in the differences in the treatment of the surface of the bar. The known performance on the influence of surface qualities and treatment on the fatigue limit gives the highest value for polished surfaces of bar.In contrast hereto lately performed endurance bending tests with non-alloyed steels and brilliant-finish polished bars showed a rotating beam fatigue limit which was 57-18% lower than that on usually smoothed or polished samples. The careful treatment of those bar surfaces was practised by polishing in that manner as in preparing a “metallographic polished specimen”. About one hour of polishing resulted a high-mirror finished surface of bar, free of scratches and grooves. The microhardness of the bar surface has been lowered hereby, e. g. at Armco-iron, from 200 to 130 kg/mm2.For better comparability of results in endurance bending strength stated by different testing offices, the method of treatment of test pieces ought to be indicated.
    Notes: Versuchsergebnisse von Umlaufbiegeversuchen aus dem Schrifttum sind, wie bekannt, nur begrenzt vergleichbar. Einer der Gründe für diese nachteilige Einschränkung bei der Auswertung liegt in Verschiedenartigkeiten bei der Bearbeitung der Staboberfläche. Die bekannte Darstellung über den Einfluß der Oberflächenbeschaffenheit und Bearbeitung auf die Dauerfestigkeit gibt für polierte Staboberflächen den höchsten Wert an.Bei neuerdings durchgeführten Umlaufbiegevrsuchen mit unlegierten Werkstoffen und hochfein polierten Proben war im Gegensatz dazu die Wechselbiegefestigkeit 5-18% niedriger als bei üblich geschliffenen oder polierten Stäben. Die sorgfältige Bearbeitung der Staboberfläche erfolgte hier durch Polieren wie bei der Herstellung eines „metallographischen Schliffes“. Etwa eine Stunde Polierzeit ergab eine spiegelblanke Staboberfläche, frei von Kratzern und Riefen. Die Mikrohärte der Staboberfläche ist dadurch z. B. bei Armco-Eisen von 200 auf 130 kg/mm2 erniedrigt worden.Der Zustand der Bearbeitung von Umlaufbiegeproben sollte zur Verbesserung der Vergleichbarkeit von Ergebnissen der Wechselbiegefestigkeit von verschiedenen Prüfstellen gekennzeichnet sein.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 440-440 
    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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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 446-448 
    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: Acid-proof cementsAccordig to the advances in the chemical industry, for new chemical processes always new problems of corrosion are arising and accordingly new tasks for constructions protected against corrosion. In this sphere acid-resisting platings are of great importance. In last time it has succeeded to develop calculation-methods for performing such platings that regard the tension-stresses depending on the variety of the construction elements. In consequence of the demands resulting hereby new cements for platings were developped, which correspond with the tension ratios given by construction, and besides show further improvements in the chemical and physical capacity of resistance.
    Notes: Durch die Fortenwicklung der chemischen Industrie ergeben sich bei neuen chemischen Produktionsverfahren ständig neue Korrosionsprobleme und dementsprechend neue Aufgaben für korrosionsgeschützte Konstruktionen. Auf diesem Gebiet spielen säurefeste Plattenverkleidungen eine große Rolle. In letzter Zeit ist es gelungen, Berechnungsmethoden für die auf der Verschiedenheit der Konstruktionselemente beruhenden Spannungsbeanspruchungen berücksichtigen. Auf Grund der sich hieraus ergebenden Forderungen wurden neue Kittmaterialien für Plattenverkleidungen ausgearbeitet, welche den konstruktionsmäßig vorliegenden Spannungsverhältnissen gerecht werden und außerdem noch weitere Verbesserungen in der chemischen und physikalischen Widerstandsfähigkeit besitzen.
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: Allgemeine Eignung von Graphit als Apparatewerkstoff  -  Entwicklung von Graphitwärmeaustauschern durch die I. G. Farbenindustrie, Bitterfeld  -  Imprägniermittel und -verfahren zur Verringerung der Porosität des Graphits  -  Verbindung von Bauelementen aus Graphit.
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: Korrosionsschäden in Erdöl-Förderanlagen  -  Labor- und Betriebs-Korrosionsversuche mit Cr-, Ni-, und Cr/Ni-Stählen in korrosiven Erdöl-Gaskondensaten  -  Gefüge, mechanisches und chemisches Verhalten von 12%igem Cr-Stahlguß.Überblick über die neuere Entwicklung aushärtbarer Cr/Ni-Stähle  -  Aushärtungseffekt durch die Nichtcarbidbildner Al u. Cu  -  Gefüge, Warmbehandlung, mechanisches und chemisches Verhalten (gegen Säuren, Basen, Salze) von Cr/Ni/Cu, und Cr/Ni/Al-Stahl.
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: pH-Wert von Betriebswässern und Korrosion der Metalle  -  Versuchsaufgabe, -einrichtungen und -durchführung  -  NH3-bzw. CO2-bzw. NaOH-Gehalt und pH-Wert von Wässern  -  Grobe pH-Schätzungen  -  Temperaturkoeffizient des pH-Wertes  -  Ermittlung des Salzgehaltes ammoniakhaltiger Kondensate aus elektrischer Leitfähigkeit und pH-Wert  -  Zusammenfassung.
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    Notes: Entwicklung, Zusammensetzung, Verarbeitung, allgemeines physikalisches, mechanisches und technologisches Verhalten  -  Korrosionschemisches Verhalten in anorganischen und organischen Säuren, Salzen, Nichtmetallen und Gasen  -  Überblick über die Verwendungsgebiete  -  Zusammenfassung.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 131-139 
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: Fehlordnungserscheinungen in festen Ionenkristallen  -  Wesen der Anlauf- und Zundersysteme  -  Ausbildung dicker Zunderschichten auf reinen Metallen (Theorie der Oxydation reiner Metalle von Wagner; Zundersysteme mit ionenleitenden bzw. mit elektronenleitenden Zunderschichten)  -  Ausbildung dünner Anlaufschichten auf reinen Metallen (Theorie von Mott-Cabrera)  -  Theorie der Zundervorgänge an Metallegierungen von Hauffe und Wagner (Zundersysteme mit ionenleitenden bzw. mit elektronenleitenden Zunderschichten)  -  Über die Mitwirkung von Phasengrenzreaktionen während der Oxydation und des Aufbaus von Deckschichten  -  Theorie der inneren Oxydation von Metallegierungen nach Rhines  -  Über die Möglichkeit der Entwicklung zunderfester Metallegierungen  -  Zusammenfassung.
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: Aufgaben und Vorteile der morphologischen Betrachtung von Rosterscheinungen  -  Auflichtmikroskopische Untersuchung blanker und verrosteter Eisenteile  -  Auflichtmikroskopische Untersuchung von Deckanstrichen und Unterrostungen  -  Untersuchung einer schadhaften Druckwasserführung (Eisenwandung und Rostelemente).
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 150-152 
    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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    Keywords: Chemistry ; Polymer and Materials Science
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    Keywords: Chemistry ; Polymer and Materials Science
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 156-158 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 158-158 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 159-159 
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 159-160 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951) 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 161-163 
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    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: New developments in tin usageSurvey on the development of Sn- and P-bronze, properties and usage of ternary and quaternary Sn-alloys - properties and usage of solders containing less than the usual percentage of tin - survey on latest processes for electrodepositing of coatings of Sn and Sn-alloys - properties and usage of electrodeposited coatings of Sn, Sn, + Zn, Sn + Cu, Sn + Pb and Sn + Cd.
    Notes: Überblick über die Entwicklung von Sn- und P-Bronze - Entwicklung, Eigenschaften und Verwendung ternärer und quaternärer Sn-Legierungen - Eigenschaften und Verwendbarkeit zinnarmer Lote - Überblick über die Verfahren zur elktrolytischen Abscheidung von Überzügen aus Sn und Sn-Legierungen - Eigenschaften und Verwendung elektrolytisch abgeschiedener Sn-, Sn-Zn-, Sn-Cu-, Sn-Cd-Überzügen.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 163-165 
    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: The causes of the retarding effect of aluminum in galvanisation bathsThe temporally limited and temperature-dependent retardation of the reaction of fusible zinc with solid iron by small additions of aluminium to zinc is explained by the formation of a Fe/Al film which at first blocks the diffusion of these two partners. The Fe/Al phases formed are particularly capable of reaction in the state of a possible lattice re-arrangement and in this state can no longer retard the diffusion.
    Notes: Die zeitlich begrenzte und temperaturabhängige Hemmung des Umsatzes von flüssigem Zink mit festem Eisen durch geringe Zugaben von Aluminium zum Zink wird durch the Bildung einer die Diffusion dieser beiden Partner zunächst sperrenden Fe/Al-Schicht erklärt. Die gebildeten Fe/Al-Phasen sind im Zustand eines möglichen Gitterumbaues besonders reaktionsfähig und vermögen in diesem Zustand dann nicht mehr als Diffusionshindernis zu wirken.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 172-173 
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    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: Paints of graphiteIn view of the existing shortage of lead more attention is again paid to rust preventing paints made from graphite. A description is, therefore, given of the properties of suitable sorts of graphite as well as of their usage as rust preventing paint alone or in combination with lead paints.
    Notes: GraphitfarbenBei der allgemeinen Bleiknappheit finden heute Rostschutzfarben aus Graphit wieder größere Beachtung. Es werden deshalb die Eigenschaften geeigneter Graphitsorten sowie deren Anwendung als Rostschutzfarbe allein oder in Verbindung mit Bleifarben geschildert.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 173-181 
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    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: Materials of construction for the chemical industry (survey) 1. Part: Steel and ironBasing on the most important publications which appeared in 1949 a survey is given on the examination and corrosion of stainless steels, austenitic manganese steels, iron alloys of a high contents of silicium, heat resisting low-alloyed steels, carbon steels and cast iron, as well as their possibilities for usage in the chemical industry.
    Notes: An Hand der wichtigsten im Jahre 1949 erschienenen einschlägigen Veröffentlichungen wird ein Überblick gegeben über Prüfung und Korrosionsverhalten von rostfreien Stählen, austenitischen Manganstäben, hochsiliziumhaltigen Eisenlegierungen, hochfesten niedriglegierten Stählen, Kohlenstoffstäben und Gußeisen sowie über ihre Einsatzmöglichkeit in der chemischen Industrie.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 165-171 
    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: Experiments in the zinc-iron cellIn the model elements for oxygen concentration cells with iron electrodes - qualitatively indicated by U. R. Evans - interior resistance arise. When the surface (of the metal), which can be mechanically altered, is varied, these resistances cause a considerably variable loss of the metal at the cathode, which with well polished surfaces gives the value zero for each interior resistance of the cell, whereas the resistance can be increased by a mechanicl activation. In this report it is demonstrated that it is useful not to restrict, the conception “active surface” to a mechanical procedure of activation, but to include into this conception the state of activiy which can be influenced electrochemically. This electrochemically dependent change of the state of activity of a metal surface is due to the inhibitor effect of the electrone-receiver reacting at the cathode. This inhibitor effect is mainly dependent on the current density of the experimental cell. In order to obtain high current densities the zinc-iron cell was used. The electrone-receivers were ions of hydrogen and oxygen. In this publication hints are given for the cathodic protection of iron in practice, which correspond to the results found by F. Tödt and L. W. Haase. H. Fischer has already referred to the inhibitor effect of the discharged ion of hydrogen. The presence of “local calls with a direct passing of electrones” must again be presumed. Lately H. Grubitsch has also confirmed the reality of this electrone passing in the corrosion process at metal surfaces.
    Notes: Bei dem von U. R. Evans qualitativ angegebenen Modellelement für Sauerstoffkonzentrationsketten mit Eisenelektroden treten innere Widerstände auf, die bei Variation der mechanisch beeinflußbaren Oberflächenbeschaffenheit noch einen erheblich veränderlichen kathodischen Metallschwund in Erscheinung treten lassen, der bei gut geschliffenen Oberflächen für jeden inneren Widerstand des Elementes den Wert Null annimmt, während er durch mechanische Aktivierung größer als Null gemacht werden kann. In der vorliegenden Arbeit wird gezeigt, daß es zeckmäßig ist, den Begriff „aktive Oberfläche“ nicht auf einen mechanischen Aktivierungsvorgang zu beschränken, sondern den elektrochemisch beeinflußbaren Aktivitätszustand einer Metalloberfläche in diesen Begriff einzubeziehen.Diese elektrochemisch bedingte Veränderung des Aktivitätszustandes einer Metalloberfläche wird durch die Inhibitowirkung des an der Kathode umgesetzten Elektronennehmers bewerkstelligt. Diese Inhibitorwirkung ist namentlich von der Dichte der Adsorptionsschicht abhängig und diese wieder von der Stromdichte in dem Versuchselement. Um relativ hohe Stromdichten zu erhalten, wurde mit dem Zink-Eisen-Element gearbeitet. Die Elektronennehmer waren Wasserstoffionen und Sauerstoff.Aus der vorliegenden Arbeit ergeben sich auch Hinweise für den kathodischen Schutz des Eisens in der Praxis, die mit den Ergebnissen in Übereinstimmung stehen, die bereits von F. Tödt und L. W. Haase erhalten wurden. Auf die Inhibitorwirkung des entladenen Wasserstoffions hat schon H. Fischer hingewiesen. Das Vorhandensein von „Lokalelementen mit direktem Elektronenübergang“ mußte wieder angenommen werden. Neuerdings hat auch H. Grubitsch die Realität dieser Elektronenübergänge bei dem Korrosionsvorgang auf Metalloberflächen bestätigt.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 182-185 
    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: Prevention of corrosion by metal-sprayingThe possibilities presenting themselves in the working phases: supply of metal, heating and spraying are critically discussed. A coefficient derived from the heat content of each metal influences the speed of supply in wire spraying apparatuses and the particle size of the metal in powder spraying apparatuses. The efficiency of powder spraying apparatuses is higher than that of wire spraying apparatuses. The first are used for nonmetallic materials, hard metals and partly for zinc. The oxygen content of the coating affects unfavourably the tensile strength, elongation and notch tenacity. Indifferent gas prevnets resp. reduces oxydation.Zinc coatings as protection agains corrosion have proved to be good and are often used where meals are expose to either air or water. Aluminium is also good in steam, hot water and in the food industry. Local coatings without teh employment of indifferent gases are porous. Corrosion trials are discussed which showed a decrease of resistance in the following order: 1. wire sprayd, 2. powder sprayed, 3. coatings prepared electrolytically or by dipping into molten zinc.
    Notes: Die Möglichkeiten, die sich bei den Arbeitsphasen: Stoffzuführung, Erwärmung und Zerstäubung ergeben, werden wertend besprochen. Eine aus dem Wärmeinhalt der Stoffe abgeleitete Kennzahl beeinflußt bei Drahtspritzgeräten Zuführungsgeschwindigkeit, bei Pulverspritzanalgen Korngröße des Spritzgutes. Die Leistung von Pulverspritzgeräten ist höher als die von Drahtspritzanlagen. Erstere werden angewandt bei nichmetallischen Stoffen, Hartmetallen und teilweise bei Zink. Der Oxydgehalt der Spritszchicht beeinflußt Zugfestigkeit, Dehnung und Kerbempfindlichkeit ungünstig. Schutzgas verhütet bzw. vermindert die Oxydation. Zinkspritzschichten als Korrosionsschutz haben sich gut bewährt und finden umfangreiche Anwendung bei atmosphärischer Beanspruchung und im Wasserbau. Aluminium führte sich befriedigend ein bei Wasserdampf, Heißwasser und in der Nahrungsmittelindustrie. Bleispritzschichten sind ohne Schutzgasanwendung porös. Es werden Korrosionsversuche besprochen, die eine Abnahme der Beständigkeit in der Reihenfolge: drahtgespritzte, pulvergespritzte, im Schmelzfluß und galvanisch aufgebrachte Schutzschichten ergaben.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 191-194 
    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: Latest developments in the field of elastic gaskets for moveable and removable machine partsSynthetic rubber gaskets made from perbunan can be used in the construction of chemical apparatures on account of their resistivity against a large number of corroding agents. The upper temperature limit is, however, at aprox. +110° C - 135° C for special mixtures. Silicon rubber increases the possibilities of temperature stressing up to +200° C resp. 250° C and is specially qualified for high-vacuum on account of its low steam pressur. For great mechanical stressing an additive polymerisate is available, which has stress properties twice as high than good rubber mixtures. Thiocol gaskets are resistant to swelling in aromatic and chlorinated hydrocarbons. Gaskets of polyisobutylenes and polyethylenes are suitable for highly corroding oxydizing acids.
    Notes: Kunstkautschukdichtungen auf Perbunanbasis sind auf Grund ihrer Widerstandsfähigkeit gegen eine große Anzahl aggressiver Medien im chemischen Apparatebau einsatzfähig. Die obere Temperaturgrenze liegt jedoch bei +100° C bis 135° C für Sondermischungen. Silikon kautschuk erweitert die Temperatur-beanspruchungsmöglichkeit bis +200° C bzw. 250° C und eignet sich wegen seines geringen Dampfdruckes besonders für Hochvakuum. Bei großer mechanischer Beanspruchung steht ein Additionspolymerisa zur Verfügung, das doppelt so hohe Festigkeitswerte besitzt als gute Kautschukmischungen. Thiokoldichtungen sind in aromatischen und chlorierten Kohlenwasserstoffen quellfest. Für hochaggressive oxydierende Säuren sind Dichtungen aus Polyisobutylenen und Polyäthylenen geeignet.
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 194-197 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 2 (1951), S. 197-201 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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