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  • Polymer and Materials Science  (1,160)
  • General Chemistry  (524)
  • Cell & Developmental Biology  (107)
  • Life and Medical Sciences  (107)
  • 1960-1964  (1,791)
  • 1960  (1,791)
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  • 1960-1964  (1,791)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. IV 
    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 11 (1960) 
    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
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960) 
    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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  • 4
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 28-33 
    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: Corrosion phenomena in electrolytic condensers, and their causesA breakdown and failure of an electrolytic condenser with aluminium electrodes is mainly attributable to corrosion phenomena. These are initiated by the presence of certain cations and anions which may already be present in the raw materials, or may have entered the condenser during the manufacturing process. Compared with aluminium corrosion under normal conditions, the corrosion effect is increased by the prevailing potentials. Moreover, the formation of the 'filter layer' formed by the dielectric in the electrolytic condenser is liable to be disturbed by the slightest impurities in the electrolyte. These phenomena can be avoided by using tantalum anodes and a solid electrolyte.
    Notes: Für den Ausfall und das Versagen eines Elektrolytkondensators mit Aluminiumelektroden sind vorwiegend Korrosionserscheinungen verantwortlich. Sie werden durch die Anwesenheit bestimmter Kationen und Anionen eingeleitet. Diese können bereits in den Ausgangsmaterialien vorhanden sein oder während des Fertigungsprozesses in den Kondensator gelangen. Die Wirkungen werden gegenüber des Angriffs des Aluminiums unter normalen Bedingungen durch die herrschenden Spannungsverhältnisse vergrößert. Ferner wird die Ausbildung der Ventilschicht, die das Dielektrikum im Elektrolytkondensator darstellt, durch geringste Elektrolytverunreinigungen gestört. Die beschriebene Erscheinungen lassen sich durch Anwendung von Tantalanoden und eines festen Elektrolyten umgehen.
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  • 5
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 46-48 
    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 11 (1960), S. 61-64 
    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
    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 11 (1960) 
    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
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 93-101 
    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: On the causes and progress of aggression due to the attack of corrosive waters on cement mortar and concrete (Second Communication)This Second Communication contains a report about the comparative evaluation and interpretation of long-time tests with concrete made with Portland cement and blast furnace cement, and about analytical investigations after storage in corrosive media. These investigations have proved the decisive importance of the chemical and mineralogical composition of the Portland cement and of the setting and hardening processes in the mortar bed. In view of the agreement between the results obtained on the strength of different bases, the knowledge gained from these investigations can be regarded as a contribution, of general validity, to the clarification of the causes and processes of the aggression of corrosive waters on cement mortar and concrete. As a result, it is possible to draw certain fundamental conclusions which have a bearing on cement theory and concrete technology.
    Notes: In der II. Mitteilung wird über die vergleichende Auswertung und Deutung von Langzeitversuchen mit Beton aus Portlandzement und Hochofenzement und von analytischen Untersuchungen bei Einlagerung in aggressive Medien berichtet, durch die es gelungen ist, die entscheidende Bedeutung der chemischen und mineralogischen Zusammensetzung des Portlandzementes und der Hydratations- und Erhärtungsvorgänge im Mörtelbett nachzuweisen. Im Hinblick auf die Übereinstimmung der Untersuchungsergebnisse der verschiedenen Auswertungsunterlagen sind die Erkenntnisse, die dadurch gewonnen werden konnten, ein allgemeingültiger Beitrag zur Aufklärung der Ursachen und des Verlaufs der Aggression bei Einwirkung angreifender Wässer auf Zementmörtel und Beton, aus dem sich grundlegende zementtheoretische und betontechnologische Schlußfolgerungen ergeben.
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  • 10
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 147-151 
    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 adhesion of surface layers to metalsThe relations between adhesion and surface forces are discussed. In the ideal case, the adhesion values of surface layers can be calculated from these relations. In practice, however, a number of discrepancies must be taken into account. They are due, in particular, to the crystal structure, to grating defects, and to the plasticity of the solids. Other discrepancies encountered are related to the manner in which the surface layer has been produced, or to the bonding between layer and base. The subject is discussed with the aid of measurements of the adhesion of scale layers to iron alloys.
    Notes: Die Zusammenhänge zwischen Adhäsion und Oberflächenkräften werden angegeben. Im Idealfall lassen sich die Haftfestigkeiten von Oberflächenschichten aus diesen Beziehungen errechnen. Im praktischen Fall sind jedoch verschiedene Abweichungen zu berücksichtigen. Sie beruhen insbesondere auf der Kristallstruktur, den Gitterbaufehlern und der Plastizität der Festkörper. Ferner treten Abweichungen auf, die mit der Art der Herstellung der Oberflächenschicht bzw. des Verbundes von Schicht und Unterlage zusammenhängen. Die Betrachtungen werden an Hand von Messungen der Haftung von Zunderschichten auf Eisenlegierungen erläutert.
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  • 11
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 145-147 
    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: Corrosion protection in steel constructionWelded assemblies consisting of thinwalled steel components call for particularly effective protective measures. Passivation is the best means of preventing corrosion-promoting local currents. In a corrosion-promoting local currents. In a corrosive atmosphere, red lead shows better results than primers containing chromate. According to German Standards DIN 4115, a single coat of red lead primer can only be regarded as adequate on structural parts having a minimum thickness of 3 mm. The finishing coats should be applied as soon as possible after the application of the primer. In the finishing coat, white lead and hematite are complementary to each other. In the opinion of the german Federal Railways, a preparation of the steel parts in the workshop is to be preferred to site preparation.
    Notes: Geschweißte Verbände aus Dünnwändigen Stahlbauteilen erfordern besonders sorgfältige Durchübung der Schutzmaßnahmen. Die Passivierung ist der bestgeeignete Weg zur Unterbindung rostfördernder Lokalströme. In „aggressiver“ Atmosphäre werden mit Bleimennige bessere Ergebnisse als mit abromathaltigen Grundiermitteln erzielt. Die einmalige Bleimennige-Grundierung ist gemäß DIN 4115 nur an Baugliedern mit einer Mindeststärke von 3 mm ausreichend. Der Auftrag der Deckanstriche soll baldmöglichst nach Fertigstellung der Grundierung erfolgen. Bleiweiß und Eisenglimmer ergänzend sich im Deckanstrich. Nach Ansicht der Deutschen Bundesbahn ist die Vorbereitung der Stahlbauteile in der Werkstatt derjenigen auf der Baustelle vorzuziehen.
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  • 12
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 171-176 
    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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  • 13
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 180-183 
    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 11 (1960), S. 191-192 
    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
    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 11 (1960), S. 397-398 
    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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  • 17
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. XV 
    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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  • 18
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 426-430 
    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 11 (1960), S. 437-442 
    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 11 (1960), S. 453-456 
    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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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 458-458 
    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
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 461-463 
    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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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960) 
    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 11 (1960), S. 481-487 
    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 electrolytic deposition of iron-chromium-nickel alloysIron-chromium-nickel alloys of a composition corresponding to 18/8 chromium nickel steel can be deposited from the aqueous solutions of the sulphates of the three metals in the presence of urea and boric acid. By means of an appropriate choice of the concentrations of the components of the bath, of the pH value and of the temperature, it is possible to bring the deposit potentials of the three individual metals as well as of the alloy to virtually the same value of EH = -0.68 V. The composition of the alloy is influenced by changes in the concentration of the bath constitutents, this influence being greatest for iron, less great for nickel, and smallest for chromium.Current yield and composition of the alloy are governed by a diaphragm forming on the cathode surface and consisting of chromium hydroxide. The three metals impede each other considerably in the deposition of the alloy.
    Notes: Eisen-Chrom-Nickel-Legierungen, deren Zusammensetzung dem 18/8-Chrom-Nikkel-Stahl entspricht, können aus den wäßrigen Lösungen der Sulfate der drei Metalle in Gegenwart von Harnstoff und Borsäure abgeschieden werden. Durch geeignete Wahl der Konzentration der Bestandteile, des pH-Wertes und der Temperatur können die Abscheidungspotentiale sowohl der drei Einzelmetalle als auch der Legierung auf praktisch den gleichen Wert von EH = -0,68 V gebracht werden. Die Zusammensetzung der Legierung wird durch Veränderung der Konzentrationen der Bestandteile beeinflußt, wobei dieser Einfluß am größten für Eisen, geringerer für Nickel und am kleinstem für Chrom ist.Für die Stromausbeuten und die Zusammensetzung der Legierung ist ein aus Chromhydroxyd bestehendes, sich auf der Kathodenoberfläche ausbildendes Diaphragma entscheidend. Die drei Metalle behindern sich beträchtlich gegenseitig bei der Abscheidung der Legierung.
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  • 25
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 507-509 
    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 11 (1960), S. 257-257 
    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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  • 27
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 28
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 525-526 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 29
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 330-330 
    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 11 (1960), S. 332-334 
    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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  • 31
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 330-330 
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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 11 (1960) 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 33
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 626-626 
    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: Specific quantitative determination of nitriteNitrite is not stale in diluted aqueous solutions. If nitrite is used, e.g. as a corrosion inhibitor, it is therefore necessary to watch the concentration volumetrically. In the presence of oxidizable substances, the normal unspecific oxydimetric methods cannot be used, and can easily lead to errors. In contrast, the reaction between nitrite and aminosulphoric acid (sulphamic acid) is specific, and is quantitatively determined in an acid solution. The analytical method is described.
    Notes: Nitrit ist in verdünnten wäßrigen Lösungen nicht beständig. Verwendet man z. B. Nitrit als Inhibitor, um vor Rost zu schützen, muß man daher die Konzentration analytisch überwachen. Die üblichen unspezifischen oxydimetrischen Methoden können in Gegenwart oxydierter Stoffe nicht angewendet werden und führen leicht zu Fehlern. Dagegen ist die Reaktion zwischen Nitrit und Aminosulfonsäure (Sulfaminsäure) spezifisch und verläuft in saurer Lösung quantitativ. Das Analysenverfahren wird beschrieben.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 632-637 
    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 11 (1960), S. 658-660 
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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 11 (1960), S. 664-665 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 672-672 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 691-701 
    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: Corrosion problems of canning materials for nuclear fuel elementsThe author deals with the more important corrosion phenomena liable to occur between canning materials and coolants of nuclear reactors. With reactors cooled by water or heavy water, aluminium and zirconium are today the most important materials. By means of alloying measures, it has been possible to obtain a great improvement in the corrosion behaviour of these two metals. In the case of water-cooled reactors working with enriched uranium, stainless steels are best suited. In metallic coolants, zirconium and stainless steels have a high resistance, provided that suitable precautions are taken. In organic coolants, serious corrosion problems are hardly encountered, through the hydrogen arising from the decomposition of these substances precludes the use of zirconium. The problems encountered with gas-cooled reactors are variegated. CO2, now the most commonly used cooling gas, causes scale formation on most of the metallic canning materials at temperatures above approx. 500° C. Satisfactory practical experience has been gathered, in particular, with magnesium alloys at temperatures up to approx. 450° C. with beryllium, it should even be possible to attain temperatures which are about 150° C higher.
    Notes: Es wird über die wichtigsten Korrosionserscheinungen, die zwischen Hüllmaterialien und Kühlmitteln von Kernreaktoren auftreten können, berichtet. In wasser- oder schwerwassergekühlten Reaktoren besitzen Aluminium und Zirkonium heute die größte Bedeutung. Bei beiden Metallen konnte durch legierungstechnische Maßnahmen eine wesentliche Verbesserung des Korrosionsverhaltens erzielt werden. Für mit angereichertem Uran arbeitende wassergekühlte Reaktoren sind meist rostfreie Stähle am besten geeignet. In metallischen Kühlmitteln sind Zirkonium und rostfreie Stähle unter entsprechenden Vorsichtsmaßnahmen gut beständig. In organischen Kühlmedien treten kaum ernste Korrosionsprobleme auf, allerdings schließt der bei der Zersetzung dieser Substanzen entstehende Wasserstoff die Verwendung von Zirkonium aus. Die bei gasgekühlten Reaktoren auftretenden Probleme sind vielseitig. CO2, das heute gebräuchlichste Kühlgas, führt bei den meisten metallischen Hüllstoffen bei Temperaturen über etwa 500° C zur Verzunderung. Praktisch bewährt haben sich vor allem Magnesiumlegierungen bei Temperaturen bis etwa 450° C. Mit Beryllium dürften sich noch etwa 150° C höhere Temperaturen erreichen lassen.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 701-707 
    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 structure and other properties of hard oxide layers produced upon aluminium by anodic oxidationAfter a short survey of the formation mechanism of oxide layers growing upon aluminium during anodic oxidation the report presents experimental results obtained in investigating the growth of hard oxide layers in dilute sulfuric acid. Particular reference is made to the initial period of anodization and to changes in surface roughness measured during surface refining. Additional data cover results of thickness measurements on barrier layers and total layers, as well as oxide structure and chemical composition of the oxide layers. According to these findings the formation mechanisms, the structure and the chemical composition of layers produced by hard-anodizing exhibit the same regularities and basic structure as normal eloxal-layers.
    Notes: In diesem Bericht werden nach einem kurzen Überblick über die Entstehung der durch anodische Oxydation auf der Aluminiumoberfläche sich bildenden Oxydschichten die Untersuchungsergebnisse geschildert, die bei dem Wachstum der in verdünnter Schwefelsäure hergestellten Hartoxydschichten erzielt wurden. Näher beschrieben und gekennzeichnet werden die Anfangsperiode der Anodisierung und die bei der Oberflächenveredelung gemessene Veränderung der Oberflächenunebenheiten. Weiter werden die Ergebnisse von Sperr- und Gesamtschichtdickemessungen sowie die Resultate der Untersuchungen der Oxydstruktur und der chemischen Zusammensetzung der Oxydschichten mitgeteilt. Hiernach zeigen der Bildungsmechanismus, die Struktur und chemische Zusammensetzung der durch Hartoxydation erzeugten Schichten dieselben Regelmäßigkeiten und denselben prinzipiellen Aufbau wie die normalen Eloxalschichten.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 713-717 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 720-723 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 723-723 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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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: The influence of amines as well as thiourea and diphenylthiourea on the hydrogen over-potential at the mercury electrodeAn investigation has been carried out on the variation of polarisation curves in the mercury -1 n-H2SO4 system with the addition of amines as well as thiourea or diphenylthiourea in the current density range from 10-6 to 10-2 amps/cm2. In this range, it was only for thiourea and diphenylthiourea that agreement could be found between the results of the investigation and the inhibiting effect of the inhibitors named.
    Notes: Es wurde der Verlauf von Polarisationskurven in dem System Quecksilber / 1 n-H2SO4 mit Zusatz von Aminen bzw. Thioharnstoff oder Diphenylthioharnstoff im Stromdichtenbereich von 10-6 bis 10-2 A/cm2 untersucht. In diesem Stromdichtenbereich war nur für Thioharnstoff eine Übereinstimmung der erhaltenen Versuchsergebnisse mit dem Sparbeizeffekt der erwähnten Inhibitoren festzustellen.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 514-517 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 524-524 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 526-527 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. XXX 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960) 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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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: The salt spray testAs a general corrosion test method, the salt spray test must be rejected as it is difficult to reproduce and does not always yield qualitatively correct results. For instance, the good performance of cadmium coatings experienced with the salt spray test does not correspond to a good corrosion resistance in industrial air.The existing standards are surveyed, and 22 independent variables are discussed which govern the results of the tests.Today, the salt spray test is only regarded as suitable for determining coarse flaws in coatings, and for comparing the performance of materials which are not too different from each other, e.g. surface-treated aluminium alloys.
    Notes: Die Salzsprühprobe ist als allgemeine Korrosionsprüfmethode abzulehnen, da sie schlecht reproduzierbar ist und nicht einmal qualitativ richtige Ergebnisse liefert. Z. B. entspricht das gute Verhalten von Cadmiumüberzügen bei der Salzsprühprobe nicht auch einer guten Korrosionsbeständigkeit in Industrieluft.Ein Überblick über die bestehenden Normen wird gegeben und es werden 22 Versuchsvariable besprochen, die den Ausfall der Prüfung bestimmen.Die Salzsprühprobe wird heute nur noch zur Feststellung grober Fehlstellen in Überzügen und zum Vergleich des Verhaltens nicht zu sehr verschiedener Werkstoffe, z. B. von oberflächenbehandelten Aluminiumlegierungen, als geeignet erachtet.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 554-563 
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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: Corrosion tests with nickel-plated sheets of killed and rimmed steelWith a number of different types of steel plates (killed and rimmed steel, Thomas steel, Siemens Martin steel, square steel), research has been carried out on the influence of the base metal on the effectiveness of the corrosion protection afforded by the galvanic nickel plating. With plates of the different types of steel subjected to the same finishing treatment, neither the short-time ferroxyle test nor the salt spray test nor storage under moist conditions revealed any noticeable differences in the corrosion resistance of the nickel plating. Minor differences between different types of plates, as they are sometimes observed with out door corrosion, were not noticeable with the short-time test.The investigations lead to the conclusion that, contrary to widespread opinion, killed steel can be nickel-plated with the same corrosion protection effect as rimmed steel.
    Notes: An verschiedenen Stahlblechsorten (beruhigter und unberuhigter Stahl, Th-, SM- und VK-Stahl) wurde der Einfluß des Grundmetalls auf den Rostschutzwert der galvanischen Vernicklung untersucht. Bei gleich vorgeschliffenen Blechen der verschiedenen Stahlsorten ergab die Kurzprüfung im Ferroxyltest, im Salzsprühversuch und bei der Feuchtlagerung keinen deutlichen Unterschied der Rostbeständigkeit der Vernicklung. Feinere Unterschiede, die bei der außenatmosphärischen Korrosion bei verschiedenen Blechsorten teilweise beobachtet wurden, ließen sich im Kurzversuch nicht feststellen.Auf Grund der durchgeführten Untersuchungen ist zu schließen, daß im Gegensatz zu einer verbreiteten Meinung beruhigter Stahl mit gleicher Rostbeständigkeit vernickelt werden kann wie unberuhigter.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 578-583 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: Conditions for the cathodic corrosion protection of metalsAfter a discussion of the part played by cathodic corrosion protection within the whole sphere of corrosion protection, the thermo-dynamic and kinetic conditions required for this method ar investigated. In this connection, some diagrams are reproduced from an “Atlas of electrochemical equilibria” at present under preparation, and which show, for 43 metals and metalloids, at which values of electrode potentials and pH one must expect corrosion, passivity, or immunity. Some of these cases are discussed in detail, including the influence of solid or gaseous hydrides which may arise in the process. It is also shown, on the strength of some examples, in which way polarisation curves can be used in developing cathodic protection systems for normal and stainless steels. In this connection, special attention is drawn to the dangerous effects of a badly planned cathodic protection system. In conclusion, the effectiveness, reliability and future potentialities of this protection method are discussed.
    Notes: Nach einer Erörterung der Stellung, welche der kathodische Korrosionsschutz von Metallen im Rahmen des Gesamtgebietes „Korrosionsschutz“ einnimmt, werden die für dieses Verfahren erforderlichen thermodynamischen und kinetischen Voraussetzungen untersucht. In diesem Zusammenhang werden einige Diagramme gezeigt, die einem in Vorbereitung befindlichen „Atlas der elektrochemischen Gleichgewichte“ entnommen sind und die für 43 Metalle und Metalloide zeigen, bei welchen Werten von Elektrodenspannung und pH Korrosion, Passivität oder Immunität vorliegen müßten. Einige dieser Fälle werden ausführlich erörtert und dabei auch der Einfluß eventuell entstehender fester oder gasförmiger Hydride diskutiert. Anhand einiger Beispiele wird ferner gezeigt, in welcher Weise Polarisationskurven bei der Entwicklung von kathodischen Schutzsystemen für normale und rostfreie Stähle herangezogen werden können; dabei wird besonders auf die gefährlichen Auswirkungen eines schlecht durchdachten kathodischen Schutzsystems hingewiesen. Abschließend werden Wirksamkeit, Sicherheit und Entwicklungsmöglichkeiten dieser Schutzmethode erörtert.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 791-792 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 804-804 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 666-669 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: Distribution of potential and current with cathodic corrosion protectionThe distribution of the potential and of the current in local cells and with cathodic corrosion protection can be calculated from the differential equation for the electric field in an electrolyte solution. The relevant limit conditions are formulated in a general way. In the case of sacrificial anodes and external current, solutions for simple limit conditions are put forward, and the general conclusions are discussed. Where it is necessary to protect major objects, it appears desirable to use external current which is automatically regulated in such a way that the local electrode potential, measured by a probe at the most exposed point, is equal to the potential of a just about negligible metal dissolution, but not much more negative, so that cathodic hydrogen development is minimized, especially at points situated next to the anode.
    Notes: Potentialverteilung und Stromverteilung in Lokalelementen und bei kathodischem Korrosionsschutz lassen sich aus der Differentialgleichung für das elektrische Feld in einer Elektrolytlösung berechnen. Die zugehörigen Grenzbedingungen werden in allgemeiner Form aufgestellt. Für Schutz mit Opferanoden und mit Fremdstrom werden Lösungen für einfache Grenzfälle mitgeteilt und die praktischen Schlußfolgerungen besprochen. Falls größere Objekte zu schützen sind, erscheint es empfehlenswert, Fremdstrom zu verwenden, dessen Stärke automatisch derart geregelt wird, daß das mit einer Sonde an der am meisten gefährdeten Stelle gemessene örtliche Elektrodenpotential gleich dem Potential gerade noch vernachlässigbarer Metallauflösung ist, jedoch nicht wesentlich negativer, um kathodische Wasserstoffentwicklung auf einem Minimum zu halten, insbesondere an Stellen, die nächst der Anode gelegen sind.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 785-789 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 792-797 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 803-804 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960) 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 325-328 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 396-396 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 401-410 
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    Description / Table of Contents: The stability of heterogeneous surface structures during the corrosion of passivable metalsThe question of the stability of surface structures of corroding metals is examined on the basis of the thermodynamics of irreversible processes, and it is shown that, in the presence of several independent variables of state, even heterogeneous structures such as those encountered with pitting corrosion may be stable. This is demonstrated in the Second Part by means of a practical example, quantitatively calculated by an analogue computer, concerning the corrosion of iron in sulphuric acid. By way of application, a theory is developed in the Third Part concerning the pitting corrosion of iron in sulphuric acid containing halide ions; this theory is largely based on the non-monotonic alignment of the current potential curve of the passivable metals.
    Notes: Auf der Grundlage der Thermodynamik irreversibler Prozesse wird die Frage nach der Stabilität von Oberflächenstrukturen korrodierender Metalle untersucht und gezeigt, daß bei Vorhandensein von mehreren unabhängigen Zustandsvariablen auch heterogene Strukturen, wie sie z. B. bei der Lochfraßkorrosion auftreten, stabil sein können. Dies wird im 2. Teil an praktischen, mit einer Analogie-Rechenmaschine quantitativ durchgerechneten Korrosionsbeispiel (Eisen in Schwefelsäure) demonstriert. Im 3. Teil wird als Anwendung eine Theorie der Lochfraß korrosion an Eisen in halogenionenhaltiger Schwefelsäure entwickelt, die im wesentlichen auf dem nichtmonotonen Verlauf der Stromspannungskurve der passivierbaren Metalle beruht.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 465-473 
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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: Titanium as material for chemical equipmentBecause of its favourable properties, titanium has very quickly passed through its first development stages and has meanwhile reached considerable production figures. Though the specific gravity of titanium is little more than half of that of steel, its strength corresponds to that of high-grade steel. Whilst these properties are of particular interest to aircraft production, the high corrosion resistance of titanium has led to a steadily increasing use of this metal as a material for chemical equipment. In this sphere, titanium is primarily used in cases where the corrosion problems encountered cannot be solved, or cannot be satisfactorily solved, by conventional materials. In many cases, the media concerned are those where the corrosion is caused by chlorine ions. This may cause the well-known phenomenon of pitting corrosion even with, e.g. stainless steel, whilst titanium can generally be regarded as absolutely corrosion-proof even in such media.A number of illustrations of titanium components, some of them on a large scale, show the scope of applications for which this new metal is already being used and processed. Since the best processing conditions for titanium have now been worked out and the necessary machinery etc. is now available, the manufacture of titanium components and titanium linings is generally no longer very difficult. Special experience and care is required for the welding of titanium parts in order to prevent oxygen and nitrogen from reaching the melt and thus causing embrittlement.A number of hints of a structural nature that must be taken into account in using titanium should be of value to the designer.Finally, it is shown on the strength of a number of examples that, in spite of its higher price compared with conventional materials, titanium often permits the most economic solution of a problem, all the more so as the prices of titanium have already shown a considerable decrease as the demand increased.
    Notes: Aufgrund der guten Eigenschaften von Titan hat es die ersten Stufen seiner Entwicklung sehr schnell durchlaufen und hat inzwischen eine beträchtliche Produktionshöhe erreicht. Bei dem geringen spezifischen Gewicht von nur etwas mehr als der Hälfte von Stahl weist es Festigkeiten auf, die denen der Edelstähle entsprechen. Während diese Eigenschaften vornehmlich für den Flugzeugbau interessant sind, führt die hohe Korrosionsbeständigkeit des Titans zu der stetig wachsenden Verwendung dieses Metalls im Bereich des chemischen Apparatebaues. Hier wird es in erster Linie eingesetzt in den Fällen, bei denen mit den herkömmlichen Werkstoffen die vorliegenden Korrosionsprobleme nicht oder nur unbefriedigend gelöst werden können. Vielfach handelt es sich dabei um Medien, bei denen ein Angriff von Chlorionen eintritt. Dieser verursacht bei beispielsweise rostfreiem Stahl den bekannten Lochfraß, während Titan in solchen Medien im allgemeinen als absolut beständig angesehen werden darf.Anhand etlicher Bilder von Titanteilen auch in großen Abmessungen wird gezeigt, in welchen Größenordnungen dieses neue Metall heute bereits angewendet und verarbeitet wird. Nachdem die besten Verarbeitungsbedingungen für Titan erarbeitet wurden und die hierzu erforderlichen Vorrichtungen etc. vorhanden sind, bereitet die Fertigung von Titanteilen und Titanauskleidungen im allgemeinen keine großen Schwierigkeiten mehr. Vor allem erfordert das Schweißen große Erfahrungen und Sorgfalt, um zu verhindern, daß während des Schweißens Sauerstoff zum Schweißbad gelangt, durch die das Material versprödet wird.Eine Reihe von Hinweisen konstruktiver Art, die bei der Verwendung von Titan besonders berücksichtigt werden müssen, sind besonders für den Konstrukteur wertvoll.Schließlich wird anhand einiger Beispiele gezeigt, daß das Titan trotz seines gegenüber den herkömmlichen Werkstoffen höheren Preises vielfach die wirtschaftlichste Lösung eines Problems ermöglicht, zumal die Preise des Titans selbst mit steigender Verwendung bereits erheblich ermäßigt werden konnten.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 489-496 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 497-506 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 518-523 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 524-524 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 552-554 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Investigation of electrocapillary curvesElectrocapillary curves for a system Hg-1N aqueous solution of H2SO4 with small amounts of sulphoxides, amines, thiourea and diphenylthiourea have been investigated. The electrocapillary results which well agree with inhibition efficacy of such compounds indicate that neutral molecules are responsible in inhibition processes.
    Notes: Aufgenommen wurden Elektrokapillarkurven für das System Hg/1 n-H2SO4 mit Zusatz von verschiedenen Sulfoxyden, Aminen, Thioharnstoff und Diphenylthioharnstoff. Zwischen den hierbei erhaltenen Resultaten und denen bezüglich der Sparbeizwirkung von neutralen Molekülen bei diesem Adsorptionsprozeß wurde eine gute Übereinstimmung gefunden.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 551-551 
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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: A new nickel alloy prevents corrosion by hot sulphuric acidsThe new alloy here described is the first material which has been found to be proof against corrosion by hot sulphuric acid within wide concentration ranges. The composition of this material, expressed in mean values, is a follows:Ni = 55%, Cr = 28%, Cu = 5,5%, Mn = 1,25%, Fe = 1,0% and C = 0,05%.Any variation in these percentage shares of the different alloy constituents will also affect the corrosion resistance of the alloy.The present report discusses the new alloys Illium G, Alloy 20 and Illium 98, their composition, and their resistance values which are tabulated.
    Notes: Die beschriebene neue Legierung ist das erste Material welches in weiten Konzentrationsbereichen gegen heiße Schwefelsäure beständig ist. Die Zusammensetzung dieses neuen Werkstoffes ist (Mittelwerte):Ni = 55%, Cr = 28%, Cu = 5,5%, Mn = 1,25%, Fe = 1,0% und C = 0,05%.Änderungen in diesen Anteilen der einzelnen Legierungskomponenten verändern auch gleichzeitig die Korrosionsbeständigkeit der Legierung.In dem Bericht werden die neuen Legierungen Illium G, Legierung 20 und Illium 98 besprochen, ihre Zusammensetzungen gegeben und die Beständigkeitswerte in einer Tabelle dargestellt.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 563-569 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 155-156 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Method of testing internally varnished sample pans for their chemical resistanceA method is described which, with relatively simple means, enables the varnish coating of sample pans varnished on the inside to be tested for their corrosion resistance against chemicals at raised temperatures, and for their impermeability to air.
    Notes: Es wird ein Verfahren beschrieben, wie man mit relativ einfachen Mitteln die Lacküberzüge innenlackierter Musterschalen auf ihre Korrosionsbeständigkeit gegen Chemikalien bei erhöhter Temperatur und gleichzeitig luftdichtem Abschluß prüfen kann.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 183-186 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 186-189 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 22-27 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The systematology of the corrosion of metals in soil (II).-LeadThe second part of the investigation on the systematology of the corrosion of metals in soil is devoted to the behaviour of lead and lead cables. Again, the corrosion phenomena taking place on the surface of the metal are of an electrochemical nature. The distribution of the anodic and cathodic zones on the lead surface depends on the size of the soil particles, on the water saturation condition of the soil, on the pH value of the soil, and on the duration of the test.With the field tests, the dissolution rate of lead with 1 pC Sb and commercial lead has been clearly found dependent on the average annual rainfalls and on the pH value of the soil.The corrosion-chemical behaviour of the lead cable sheathing in soil is governed by stress corrosion. An initial localisation of the corrosion phenomena is accompanied by plastic deformations which then cause electro-chemical reactions.
    Notes: Der zweite Teil der Untersuchung der Systematik der Korrosion der Metalle im Erdreich ist dem Verhalten des Bleis und des Bleikabels gewidmet. Die Korrosionserscheinungen, die an der Bleioberfläche ablaufen, sind wiederum elektrochemischer Natur. Die Verteilung der anodischen und kathodischen Bezirke auf der Bleioberfläche ist abhängig von der Größe der Bodenteilchen, vom Sättigungszustand des Bodens an Wasser, vom pH-Wert des Bodens und von der Versuchsdauer.Bei Naturversuchen zeigt die Auflösungsgeschwindigkeit vom Blei mit 1% Sb und von Handelsblei eine deutliche Abhängigkeit von der durchschnittlichen jährlichen Regenmenge und vom pH-Wert des Bodens.Für das korrosionschemische Verhalten des Bleikabelmantels im Erdreich ist die Spannungskorrosion ausschlaggebend. Es resultiert zuerst die Lokalisierung des Korrosionsvorgangs mit plastischen Verformungsvorgängen, die dann von elektrochemischen Reaktionen begleitet sind.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 33-39 
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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: Zinc corrosion caused by modern detergentsAn investigation has been carried out on the influence of soap and synthetic detergents on the corrosion of zinc, with special regard to the hardening constituent of the water. A description is given of a laboratory testing method which permits the determination of the corrosive effect of numerous detergent components and built-up detergents. Various substances are tested for their inhibiting effect in a standard syndet in hard and soft water, and the influence of repeated effects of fresh liquids on zinc is evaluated and discussed. With detergents of normal composition, polymer phosphates show the greatest intensity of corrosion which is merely (and clearly) exceeded by the effect of the combination of these phosphates with bleaching agents (sodium perborate). A working theory for the action of such combined corrosion is discussed.
    Notes: Der Einfluß von Seifenwaschmitteln und Syndets auf die Korrosion von Zink wird unter besonderer Berücksichtigung der Härtebildner des Wassers untersucht. Eine Laboratoriumstestmethode wird mitgeteilt, mit welcher die korrodierende Wirkung zahlreicher Waschmittelkomponenten und damit aufgebauter Waschmittel ermittelt wurde. Verschiedene Substanzen werden auf ihre inhibierende Wirkung in einem standardisierten Syndet in harten und weichem Wasser geprüft und der Einfluß von mehrfachen Einwirkungen frischer Flotten auf Zink eruiert und diskutiert. In den Waschmitteln üblicher Zusammensetzung zeigen die polymeren Phosphate die stärkste Korrosion, die nur durch die Kombination dieser mit Bleichmitteln (Natriumperborat) deutlich übertroffen wird. Eine Möglichkeit des Wirkungsmechanismus dieser kombinierten Korrosion wird diskutiert.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 57-60 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 75-75 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 76-76 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 77-79 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 81-87 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The ohmic resistance of inhibitor films with the acid corrosion of ironThe ohmic resistances of organic inhibitors in hydrochloric acid and sulphuric acid have been determined by means of direct resistance measurements. Depending on the concentration and on the type of inhibitor, the resistances were found to vary between 1 and 1200 ohm. The iron surface itself also has an influence. With poor inhibitors, their adsorption and desorption are slower. This process also depends on the concentration and type of inhibitor as well as on the surface condition of the iron. Where the inhibiting effect is good, the inhibitors are adsorbed by virtually the whole metal surface, that is to say, at local cathodes and anodes. A high film resistance corresponds to a high inhibiting effect, and vice versa. Apart from the adsorption rate, the quality of the inhibitor also depends on its solubility.
    Notes: Es wurden die Ohmschen Widerstände von organischen Inhibitoren in Salz- und Schwefelsäure durch eine direkte Widerstandsmessung bestimmt. Sie schwanken, je nach der Konzentration und Art des Inhibitors, zwischen 1 und 120 Ω. Auch die Eisen-Oberfläche selbst hat einen Einfluß. Adsorption und Desorption der Inhibitoren verlaufen bei schlechten Inhibitoren langsamer. Dieser Vorgang ist gleichfalls von der Konzentration und Art des Inhibitors sowie von der Eisenoberflächenbeschaffenheit abhängig. Die Inhibitoren werden bei guter Hemmungswirkung praktisch auf der gesamten Metalloberfläche, also an Lokalkathoden und -anoden adsorbiert. Einem großen Filmwiderstand entspricht eine hohe Hemmungswirkung und umgekehrt. Die Güte des Inhibitors hängt außer von der Geschwindigkeit seiner Adsorption auch von seiner Löslichkeit ab.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 109-116 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 79-80 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 314-317 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 209-212 
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    Description / Table of Contents: Paints for underwater use (Antifouling Paints)The corrosion protection of locks, weirs, water tanks and similar objects continually exposed to contact with water is among the most difficult tasks of painting technology.The article deals with the loads to which teh coatings are exposed, the requirements to be met by the paints destined for underwater use, and the qualitative assessment of the different agents.
    Notes: Der Korrosionsschutz von Schleusen, Wehren, Wasserbehältern u. a. Objekten, die ständig der Einwirkung von Wasser ausgesetzt sind, gehört zu den schwierigsten Aufgaben, die der Anstrichtechnik gestellt werden.Die Belastung der Anstriche, die Anforderungen an die Anstrichmittel für Unterwasserbeanspruchung und die Beurteilung der verschiedensten Anstrichmittel werden behandelt.
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 230-234 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 238-241 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 255-255 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 523-523 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 257-257 
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    Materials and Corrosion/Werkstoffe und Korrosion 11 (1960), S. 264-264 
    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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