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  • Polymer and Materials Science  (594)
  • 1955-1959  (594)
  • 1955  (594)
  • 11
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 110-112 
    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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  • 12
    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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  • 13
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 112-112 
    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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  • 14
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), 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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  • 15
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955) 
    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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  • 16
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 113-117 
    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 and Heat of ActivationThe rate of corrosion of water and vapor on iron follows the Arrhenius equation. \documentclass{article}\pagestyle{empty}\begin{document}$$k = k_m \cdot e^{ - \frac{Q}{{R \cdot T}}}$$\end{document} as proved by experiments. The heat of activation Q depends on the nature of the material and the phases of the water and of the dissolved electrolytes. The Author refers to similar interpretations by Matthaes on the corrosion of aluminium and of steel caused by different corrosive agents and tries to explain deviations of this rule.
    Notes: Es wird nachgewiesen, daß die Geschwindigkeit des Angriffes von Wasser und Dampf auf Eisen der Gleichung von Arrhenius \documentclass{article}\pagestyle{empty}\begin{document}$$k = k_m \cdot e^{ - \frac{Q}{{R \cdot T}}}$$\end{document} folgt. Die Aktivierungswärme Q ist von der Art des Werkstoffes, den Phasen des Wassers und von den im Wasser gelösten Elektrolyten abhängig. Auf ähnliche Versuchsauswertungen von Matthaes über den Angriff auf Aluminium und verschiedener Angriffsmittel auf Stahl wird, hingewiesen. Es wird versucht, Abweichungen von der Gesetzmäßigkeit zu deuten.
    Additional Material: 8 Ill.
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  • 17
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 141-145 
    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
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 146-148 
    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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  • 19
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 149-151 
    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
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 136-141 
    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 Mechanism of the Decomposition of Hydrogen-Peroxide on Metallic LeadThe potentials of the galvanic cells Pb/Pt and Pb/Ag in electrolytes containing 0,01-0,4 mols of H2O2 were plotted against time. The obtained results allow to draw conclusions on the mechanism of the catalytic decomposition of H2O2 on lead.The decomposition of H2O2 on metallic lead in 0,01-0,25 molar solutions of H2O2 at 20, 40 and 60°C temperature is characterized by a period of induction. The effect does not occur at higher concentrations of H2O2. If the specimen is preliminarily dipped into a 0,1 molar solution of H2O2 at 20°C temperature for 30 min. no period of induction occures. The decomposition under these conditions is a reaction of zero order.By the effect of H2O2 on freshly precipitated Pb(OH)2 a number of higher leadoxides are produced. Their general formula is PbOn where n is a number between 2 und 3.Experiments on the influence of the state of the surface on the corrosion of lead are discussed.
    Notes: Der Wasserstoffsuperoxyd-Zerfall auf metallischen Blei wurde elektrochemisch und kinetisch verfolgt, wobei die ständige Änderung der Bleioberfläche durch einige Kontaktsubstanzen, die der 0,01 bis 0,4 mol-H2O2-Lösung zugesetzt wurden, durch Potential-Zeit-Messungen, mittels einer Platin- und Silber-Hilfselektrode verfolgt wurde.Der Wasserstoffsuperoxyd-Zerfall auf metallischem Blei bei 20, 40 und 60°C in 0,01 bis 0,25 mol H2O2-Lösung ist durch eine Induktionsperiode gekennzeichnet, die jedoch bie höheren Konzentrationen vollständig verschwindet. Wird die Bleiprobe vor dem Eintauchen in die H2O2-Versuchslösung in einer 0,1 mol-H2O2-Lösung etwa 30 min bei 20°C behandelt, so verschwindet die Induktionsperiode. Die Zerfallreaktion läuft dann als Reaktion nullter Ordnung ab. Durch Einwirkung von H2O2 auf frisch vorbereitetes Pb(OH)2 entsteht eine Reihe höherer Bleioxyde der allgemeinen Formel PbOn, wo n Werte zwischen 2-3 darstellen kann.
    Additional Material: 6 Ill.
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