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  • Polymer and Materials Science  (443)
  • Wiley-Blackwell  (443)
  • 1985-1989
  • 1960-1964
  • 1950-1954  (443)
  • 1953  (443)
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  • Wiley-Blackwell  (443)
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  • 1985-1989
  • 1960-1964
  • 1950-1954  (443)
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  • 101
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 270-271 
    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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  • 102
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 271-271 
    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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  • 103
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 356-357 
    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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  • 104
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 382-386 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 105
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 106
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 395-395 
    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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  • 107
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 395-395 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 108
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 395-395 
    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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  • 109
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 402-406 
    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
    Description / Table of Contents: The Cleaning and Preparatory Treatment of steel surfaces before PaintingBefore anti-corrosive paints can be applied to steel surfaces, it is necessary that they be cleaned and otherwise prepared. Cleaning can be performed by the application of solvents, mechanical methods, sand blasting and treatment with dilute acids. Other preparation includes the application of phosphates, reactive primer coats, etc., to the cleaned surfaces. This preparatory treatment is important, since the durability and life of the anti-corrosive paint depends on this primer coat. Reference is made to the requirements of the American constructional steel industry relative to the cleaning and treatment of steelwork previous to the application of anti-corrosive paints.
    Notes: Bei Ausführung von Korrosionsschutzanstrichen wird die Vorbereitung und Reinigung des Stahls durch Lösungsmittel, mechanische Werkzeuge, Sandstrahlen und Säurebeizung sowie der Vorbehandlung des gereinigten Metalls mit Phosphaten, Reaktionsgrundierungen usw. erhöhte Aufmerksamkeit gewidmet, da die Anstrichhaltbarkeit ganz wesentlich von dieser Vorbereitung des Substrates abhängt. Behandelt werden die Anforderungen, die von der amerikanischen Stahlindustrie des Stahls sowie an den Aufbau und die Ausführung von Rostschutzanstrichen gestellt werden.
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  • 110
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 425-425 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 111
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 426-426 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 112
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 113
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 428-428 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 114
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 437-442 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 115
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 429-436 
    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 Anodic Behavior of Nickel in Hydrochloric Acid, Sodium, Chloride and Nickel Chloride SolutionsNickel is always completely active in solutions of HCL, NaCl and Nicl2. Nickel surfaces free from all layers of impurities are best obtained by an anodic treatment repeated seven or eight times. The nickel in these solutions is, at first, always active in the shape of a divalent nickel ion in solution. If the current density is sufficiently high, there is, first of all, a passivation by a layer of nickel - II - chloride. An increase in the effective current density in the pores of this layer causes the nickel to change to another modification, which transmits trivalent nickel ions into the solution. This action occurs at a higher nickel potential. A second mechanical passivation by a nickel salt of higher valency, combined with an increase in potential up to +3,2 volts, also takes place. The nickel then dissolves with a mixed valency of 2,15 to 2,20 in a condition of so called chemically passive state. Both passivation processes follow the Müller-Machu time law for mechanical covering processes. The occurence of these two different passivities was actually made visible by the formation of two different covering layers, one of nickel - II - chloride and the other of a brown nickel compound that was insoluble in 5 N HCL. This second compound probably consists of NiO2, of an organic nature are increasing in importance. It is very necessary that equipment standing idle for any length of time be protected by “cocooning” or by covering with V.P.I. paper. Conditions in shipbuilding, railway operating, automobile and airplane construction are then described. The article closes with a few words on the test methods. Literature and organisation, particular emphasis being laid on the necessity for centralisation on a large scale and the creation of a Research Institute.
    Notes: Nickel ist in den Lösungen von HCL, NaCl and NiCl2 stets von Anfang an aktiv. Vollkommen deckschichtfreie Nickeloberflächen werden jedoch am besten durch eine 7 oder 8 mal wiederholte anodische Behandlung erhalten. Das Nickel geht in diesen Lösungen vorerst stets aktiv und als zweiwertiges Nickelion in Lösung. Ist die Stromdichte genügend hoch, so erfolgt vorerst eine erste Passivierung mit einem grünen Nickel-II-Chlorid. Durch einen großen Anstieg der effektiven Stromdichte in den Poren dieser Deckschicht erfolgt eine Umwandlung des Nickels in eine andere Modifikation, in welcher es dreiwertige Nickelionen in Lösung sendet. Dieser Vorgang findet bei einem höheren Nickelpotential statt. Auch in diesem Stadium tritt aber sodann eine zweite mechanische Passivierung durch ein höherwertiges Nickelsalz ein, verbunden mit einem Potentialansteig bis auf über; + 3,2 V. Im sog. chemisch passiven Zustand geht das Nickel mit einer gemischten Wertigkeit von 2,15-2,20 in Lösung. Beide Passivierungsvorgänge gehorchen dem Zeitgesetz für mechanische Bedeckungsvorgänge von Müller - Machu. Das Auftreten dieser beiden verschiedenartigen Passivitäten konnte auch durch die Bildung zweier verschiedener Bedeckungen, nämlich mit Nickel-II-Chlorid und einer braunen, auch in 5n sie anzustreichen. Unter den organischen Schutzstoffen nehmen die synthetischen Produkte einen immer größeren Raum ein. Wichtig ist z.B. der Schutz von Apparaturen, die nicht im Betrieb sind, durch Umhüllung mit Schutzkokons oder VPI-Papier. Die Verhältnisse auf den Gebieten des Schiffbaus, des Eisenbahnverkehrs, der Automobil- sowie der Flugzeugindustrie werden näher berücksichtigt. Auf Prüfmethoden, Schrifttum, Organisation usw. wird in einem Schlußwort eingegangen, das in der Forderung weitergehender Zentralisierung und eines entsprechenden Forschungsinstituts gipfelt.
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  • 116
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 458-461 
    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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  • 117
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 468-473 
    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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  • 118
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 475-475 
    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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  • 119
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 120
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. I 
    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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  • 121
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 280-290 
    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: Stresses in Jackets of Digesters, with Particular Reference to Cellulose DigestersCellulose digesters have often exploded a few hours after steam has been admitted, or immediately after being steamed after having stood idle for a period, or during the Winter season when exposed to cold draughts. On the basis of these facts, the additional stresses set up in the jackets due to the expansion of the lining were subjected to a rigourous examination. Theoretical investigations proved that, all other factors remaining equal, the additional stresses increase in direct proportion to the increase in the thickness of the brickwork lining. The temperatures in the wall of the digester were measured at three different places during the course of operations by means of 10 built-in thermo-couples. The results thus obtained confirmed the theoretical investigations, and led to the formation of the stipulation that the coefficient of thermal expansion of the acid-resistant lining must not exceed 0,92 × 10-5 m/m°C. This limit must be strictly observed in the case of older digesters where the circumferential rivetting was only designed to resist minor longitudinal stresses and where the additional stresses set up by the heating of the jacket were not taken into consideration. Further results of the investigation showed that digesters under steam must be protected from cold draughts, particularly when cooling down after operations have finished. This precaution should be strictly observed during the colder months of the year.
    Notes: Zellstoffkocher zerknallten häufig einige Stunden nach Dampfeinlaß, bei Inbetriebsetzung, nach Stillstand oder im Winter unter Einfluß kalter Zugluft. Auf Grund dieses Tatbestandes wurde die zusätzliche Beanspruchung des Eisenmantels durch die Wärmedehnung der Kocherauskleidung an einer technischen Anlage untersucht. Theoretische Ableitungen ergeben, daß die zusätzliche Beanspruchung unter sonst gleichen Bedingungen mit der Dicke der Ausmauerung zunimmt. Der Temperaturverlauf in der Wand eines Kochers wurde bei verschiedenen Ankochzeiten an 3 Stellen durch Einbau von je 10 Thermoelementen im Betrieb gemessen. Die Ergebnisse erhärten die theoretischen Betrachtungen und führen zu der Forderung, daß die Wärmeausdehnungszahl der säurefesten Auskleidung nicht größer als 0,92 × 10-5 m/m.° C sein darf. Dies ist insbesondere bei älteren Kochern zu beachten, deren Rundlaschenverbindungen nur auf die kleinere Beanspruchung in achsialer Richtung abgestimmt sind, wobei die zusätzliche Beanspruchung durch die warme Auskleidung nicht berücksichtigt ist. Weitere Ergebnisse der Untersuchung zeigen, daß aufgeheizte Kocher vor Abkühlung durch Zugluft besonders in der kalten Jahreszeit zu schüzen sind.
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  • 122
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 308-309 
    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 Manufacture of Alloys by the “Impregnation” MethodThe development of the manufacture of moulded sintered metal parts and improvements in their behaviour under working conditions has made great progress, particularly abroad, whereby new fields for the utilisation of the products of powder metallurgy have been opened up. The application of the “Impregnation” method for the production of moulded machine parts is a distinct novelty. In this method, a moulded part is first formed of a porous sintered iron or steel, and the pores then impregnated with some other suitable metal.The report describes the results obtained during the last few years, and is intended to attract still greater attention than heretofore to the advantages of the utilisation of powder metallurgy and the “Impregnation” process, since parts produced by this process have a high resistance to corrosion.
    Notes: Die Entwicklung der Fertigungsverfahren fü Preßteile aus Sintermetallen und die Verbesserung ihrer Gebrauchs-eigenschaften hat besonders im Ausland beachtliche Fortschritte erzielt und den pulvermetallurgischen Erzeugnissen neue Anwendungsgebiete erschlossen. Eine wesentliche Neuerung in der Herstellung von Maschinenpreßteilen bedeutet die Anwendung des Tränkverfahrens, bei dem zunächst ein poriges Sintereisen- oder Sinterstahlpreßteil angefertigt wird, des-sen Poren man mit einem geeigneten Tränkmetall ausfüllt.Der Bericht behandelt die in den letzten Jahren erzielten Ergebnisse und soll an-regen, die Vorteile der Pulvermetallurgie und die des Tränkverfahrens in noch stärkerem Maße als bisher in Anwendung zu bringen, zumal derartig hergestellte Werkstoffe korrosionstechnisch von aus-gesprochen guter Beständigkeit sind.
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 334-334 
    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
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 346-347 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 348-348 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 2-4 
    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 Prevention of Corrosion by Dehydration of the AtmosphereThe rusting of machine elements and parts and the formation of mildew on walls and ceilings is due to an excess of moisture in the surrounding air. Hence, in locations where, as a results of the process being carried out, large quantities of stream or vapour escape into the air surrounding the equipment, the consequent disadvantages can only be mitigated by the use of a suitably designed air dehydration plant. Enamelling of machinery, ceilings or walls is only a partial solution to the problem. The basic theoretical principles of air dehydration are then discussed, and some practical applications of these principles given. The introduction of warm air and the extraction of moist air are always necessary. The quantities and temperature of the incoming air, as well as the amount of heat required, are regulated by local conditions. Some numerical problems in the calculation of the individual values are solved by the use of an i-x diagram for moist air.
    Notes: Rosten von Maschinenenteilen und Schimmelbildung an Wäden und Decken ist eine Folge zu hoher Luftfeuchtigkeit. Deshalb können dort, wo durch den Arbeitsprozesse größere Dampf-bzw. Schwadenmengen in den Raum gelangen, die Übelstände nur durch eine zweckentsprechende Entnebelungsanlage behoben werden. Lackierungen von Maschinen, Decken oder Wänden bringen nur Teilerfolge. Nachfolgend werden die theoretischen Grundlagen der Entnebelung behandelt und im Anschluß daran an praktischen Beispielen deren zweckmäßige Durchführung. Stets ist die Zuführung von Warmluft und die Abführung von Feuchtluft erforderlich, wobei sich die notwendigen Lufttemperaturen und Mengen sowie die aufzuwendende Wärme nach den betrieblichen Gegebenheiten richten. An Zahlenbeispielen wird unter Benutzung eines i-x-Diagrammes für feuchte Luft die Berechnung der einzelnen Größen gezeigt.
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 14-20 
    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: Important Facts in the history of the Prevention of Corrosion, to 1953The present work attempts to portray the gradual development of the ideas of corrosion prevention from the times of the old Romans to 1935.The work does not lay claim to being complete, nor does it claim to present every idea or suggestion concerning corrosion prevention that may have been published during this period. However, it does rescue much from oblivion, and, at the same time, shows that a lot of ideas and suggestions that are presented as being “new discoveries” have already previously appeared.
    Notes: In der vorliegenden Arbeit wird festzustellen versucht wie sich der Gedanke der Korrosionsverhütung von den Zeiten der alten Römer bis 1935 allmählich entwickelt hat.Die Arbeit beansprucht nicht, vollständig zu sein, und alle in dieser Zeit aufgetauchten Gedanken der Korrosionsverhütung auszuführen. aber sie will das, was früher auf diesem Gebiet erfunden wurde, der Vergessenheit entziehen und gleichzeitig darüber unterrichten, daß manches, was heute als „neu erfunden“ bezeichnet wird, doch schon einmal dagewesen ist.
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 20-21 
    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 4 (1953), S. 47-47 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 48-48 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 49-57 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Chrome Diffusion in Steels (short Notice)Control of the Chrome diffusion Process-Theoretical Observations - Structure of the chrome Layer - Modern Chrome diffusion processes - Properties of Chrome Steels - Application and utilisation of the Chrome process.
    Notes: Überwachung des Chromdiffusions- processes - Theoretische Betrachtungen - Struktur der Chromdiffusionsverfahren - Eigenschaften der kromierten Stäble - Anwendungsgebiete der Inkromierung.
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    Description / Table of Contents: Studies on the Behaviour of Ferrous Metals in ElectrodesNo differences in potential could be found between the hexagonal and the cubical forms of Cobalts. A hysteresis loop is formed as a result of the polarisation of Cobalt. This loop disappears with anodic or cathodic pretreatment of Cobalt. The cause of the hystersis loop has been traced back to a mutual action with an oxide surface layer. Iron also behaves in a similar manner; but it was not possible to neutralize the hysteresis loop completely in the case of Nickel. Cold-working of the Iron increases the polarisability of the Iron.
    Notes: Zwischen dem hexagonalen und dem kubischen Kobalt konnten keine Potentialunterschiede gefunden werden. Bei der Polarisation entsteht heim Kobalt eine Hysteresisschleife, die nach anodischer oder kathodischer Vorbehandlung verschwindet. Sie wird auf Wechselwirkung mit einer Oxydhaut zurückgeführt. Ähnlich verhält sich auch das Eisen; beim Nickel gelingt es nicht, die Schleife völlig zu beseitigen. Durch Kaltreckung wird die Polarisierbarkeit des Eisens erhöht.
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    Description / Table of Contents: Corrosion protection by means of Sprayed Metal CoatingsCauses of failures, mainly due to variations in density of the coatings and to factors influencing the adhesion of the coatings and to factors influencing the adhesion of the coatings. Methods to be adopted to prevent failure. Metal Spraying as a valuable method of rust prevention, which is also effective against corrosive action by various active chemicals. Summary. Literature available on the subject.
    Notes: Ursachen von Misserfolgen, hauptsächlich infolge unterschiedlicher Dichte und Dichtigkeit der Überzüge und als Wirkung von Haftgrundeinflüssen. Vermeidung von Misserfolgen. Praktische und gegen energischeren chemischen Angriff. Zusammenfassung. Bearbeitete Literatur.
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    Description / Table of Contents: Patent Law and Legal Decisions in Germany since 1945This article consists of a comprehensive, critical report on Patent Legislation and Legal Decisions handed down in various German Courts in different parts of Germany. Matters of particular interest to chemists and metallurgists are dealt with, and legal opinions on „Inventions and Discoveries“ comprehensively discussed. Increases in Patent Fees are not recommended, and the suggestion is made that the net profits made by the Patent Office should be placed at the disposal of Research Institutes.
    Notes: Es wird ein zusammenfassender, kritischer Bericht über die Rechtsetzung und Rechtsprechung in den einzelnen Teilen Deutschlands gegeben. Die besonders den Chemiker und Metallurgen berührenden Fragen werden herausgestellt und die Problematik des Begriffes „Erfindung“ mit den sich daraus ableitenden Folgerungen erörtert Die Erhöhung der Gebühren für Patente wird abgelehnt und der Vorschlag gemacht, den Reingewinn des Patentamtes als zweckgebundenes Mittel der Forschung zur Verfügung zu stellen.
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    Description / Table of Contents: The Corrosion Effects of Varying Concentrations of Nitric and Sulphuric Acids upon Welds on Aluminium and its AlloysThe action of sulphuric and nitric acids upon welded joints on aluminium and various aluminium alloys was examined. Low concentrations of sulphuric acid act first of all on the welded seam of all aluminium materials in use in industry. With higher concentrations, the effect is evenly distributed over the whole surface. Welded aluminium was shown to be highly resistant against concentrations of nitric acid varying between 1 and 65%. In the case of welded aluminium aloys, the welded seam was also the first to be acted on by medium concentrations of sulphuric acid. Welded joints made by the autogenous or the metal-arc processes do not show any great variation in their resistance to corrosion. Annealing or hammering the welds, as well as hammering followed by annealing, has, when made under the conditions obtaining during this examination, no effect upon the resistance to corrosion.
    Notes: Es wurde der Angriff von Schwefel und Salpetersäure auf Schweißverbindungen aus Reinaluminium und Aluminium-Legierungen untersucht. Schwefelsäure greift in den unteren Konzentrationsbereichen bei sämtlichen Aluminium-Werkstoffen bevorzugt die Schweißnähte an, während bei den oberen Konzentrationsgraden eine gleichmäßige Oberflächenabtragung auftritt. - Demgegenüber erwies sich geschweißtes Reinaluminium als praktisch beständig gegen 1 bis 65%ige Salpetersäure. Die geschweißten Aluminium-Legierungen erfuhren besonders bei den mittleren Konzentrationsgraden, durch Salpetersäure ebenfalls einen selektiven Angriff der Schweißnähte.-Die nach dem Autogen- bzw. Metalllichtbogen-Verfahren geschweißten Nähte zeigten keine wesentlichen Unterschiede in ihrer Korrosionsbeständigkeit, obwohl in der Angriffsform gewisse Differenzen bestehen. - Ein Nachglühen oder Hämmern der Schweißraupen sowie ein Hämmern mit anschließender Glühung ist bei den vorliegenden Angriffsbedingungen ohne jeden Einfluß auf das Korrosionsverhalten.
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 347-347 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 348-348 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 4-14 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The Influence of Impurities on the Resistance to Corrosion of Aluminium and its AlloysIt may be deduced generally from the present experiments that the resistance to corrosion of the metal. The influence of impurities is determined by the type of corrosive medium to which the metal is subjected, and, frequently, the failure of aluminium may be due more often to the influence of operating or other exterior conditions than to impurities in the metal itself.As a result of the examination of the tendencies to corrosion due to the individual impurities and small additions of foreign elements, it has been found that iron and copper exercise a harmful effect, although the effect of the iron can be greatly reduced by the addition of manganese. Silicon in solid solution is absolutely harmless, but when it is eliminated in elementary form, the powers of resistance of aluminium are reduced. Suitable heat treatment enables up to 0,5% Si. to be retained in solid solution. According to the latest investigations, the proportion of Fe. to Si. does not appear to be of particular importance to the resistance of aluminium to corrosion. Magnesium, lead, zinc and titanium in the amounts usually present in aluminum are harmless, but nickel is always injurious. Calcium and sodium, which often appear as impurities in aluminium obtained from certain ores, also influence the resistance to corrosion.The final conclusions obtained from the date on the influence of the addition of small quantities of other elements are, in most cases, not given, as the observations and results have mostly been obtained form single experiments, and, hence, do not offer sufficient material for the formation of conclusions that might be of practical value.
    Notes: Auf Grund der vorliegenden Versuchsergebnisse kann ganz allgemein gefolgert werden, daß der Korrosionswiderstand von Reinaluminium mit steigendem Reinheitsgrad zunimmt. Der Einfluß der Verunreinigungen wird bestimmt von der Art des Korrosionsmediums und oft wird das Versagen von Aluminium mehr auf die Einflüsse der vorliegenden Betriebsbedingungen bzw. seiner Umgebung als auf den der Verunreinigungen selbst zurückzuführen sein.Bei der Betrachtung der einzelnen Verunreinigungen und geringen Zusätze an fremden Elementen hinsichtlich ihrer Korrosionsbeeinflussung ergibt sich, daß Eisen und Kupfer einen schädlichen Einfluß ausüben, wobei jedoch die Wirkung des Eisens durch Zugabe von Mangan stark verringert werden kann. Silizium ist in fester Lösung völlig unschädlich, in elementarer Form ausgeschieden verringert es die Beständigkeit des Aluminium. Durch geeignete Wärmebehandlung gelingt es jedoch, bis zu 0,5% Si in fester Lösung zu halten. Das Verhältnis Fe:Si scheint nach den neueren Auffassungen für das Korrosionsverhalten von Aluminium nicht von besonderer Wichtigkeit zu sein. Magnesium, Zink, Blei und Titan sind in Gehalten, wie sie üblicherweise im Aluminium vorkommen, unschädlich, dagegen ist Nickel in jedem Falle schädlich. Auch Calcium und Natrium, die oftmals in aus bestimmten Erzen hergestelltem Aluminium als Verunreinigungen auftreten, beeinträchtigen dessen Korrosionsbeständigkeit.Bei den Angaben über den Einfluß von geringen Zusätzen weniger üblicher Elemente werden die daraus gezogenen Schlußfolgerungen in den meisten Fällen nicht wiedergeben, da die Beobachtungen überwiegend bei Einzelversuchen gemacht worden sind und demzufolge zu wenig Beweismaterial bieten für endgültige Rückschlüsse, die für die Praxis von Bedeutung sein könnten.
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 47-47 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 48-48 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 48-48 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953) 
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 1-1 
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 47-47 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 48-48 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 48-48 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 57-58 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 172-178 
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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: On the Resistance to Corrosion of poured Welds of SteelInvestigations on the resistance to corrosion of small poured welded (Thermit, etc.,) test pieces often show a difference in their resistance to corrosion from that which is determined from welds made on large pieces in actual practice. The reasons for this are investigated and explained. It is shown that alterations in the structure of the steel due to the heat of the welding operation can sometimes prove favourable to corrosion. In addition, peculiarities to corrosion. The occurence of stress corrosion in welded joints and pitting are then investigated. The influence of poured welding of ordinary steel on its resistance to corrosion is explained. Instructions for preserving from a design and operating angle, of acid-resistant and non-scaling steels are given. Precautions to be observed during the welding of ordinary steel plates and steel plares coated with anti-corrosive agents (chromed and galvanised steel plates) are given.
    Notes: Nach Stellung der Frage, warum Korrosionsuntersuchungen an kleinen Schmelzschweißproben öfters ein unterschiedliches Korrosionsverhalten gegenüber den Schweißungen an den großen Stüder Praxis liefern, wird den Gründen hierfür nachgegangen und erläutert, wieso gerade Schmelzschweißungen der Korrosion besonders stark ausgesetzt sind. Es wird gezeigt, daß durch die hier häufig anzutreffende Lokalementbildung, durch die Gefügeänderung infolge der Schweißhitze die Korrosion begünstigt wird. Hinzu können noch Eigentümlichkeiten der Konstruktion kommen, welche in der gleichen Richtung wirken. Auf das Auftreten von Spannungskorrosion bei Schweißverbindungen wird eingegangen, desgleichen auf „ Lochfraß“. Die Einflüsse auf die Korrosionsfestigkeit von Schweißungen an unlegierten Stählen weden dargelegt. Hinweise in konstruktiver, vor allem in betrieblicher Hinsicht für die Erhaltung der Korrosionsfestigkeit von Schweißungen an säure- und zunderfesten Stählen werden gegeben. Auf die Maßnahmen zur Erhaltung der Korrosionsfestigkeit beim Schweißen plattierter Bleche und auf die Schweißungen an Stahlblechen mit metallischen Schutzüberzügen (inkromierten und verzinkte Stahlbleche) wird eingegangen.
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 191-192 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 194-198 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 178-182 
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 199-199 
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    Materials and Corrosion/Werkstoffe und Korrosion 4 (1953), S. 222-225 
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