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  • 1
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Influence of copper on the corrosion behaviour of galvanized tubing in warm water systemsTests carried out with tap water (65°C) containing 0.1 to 0.3 mg/l Cu2+ have revealed that copper ions give rise to accelerated corrosion of tube walls. Corrosion takes place in the form of pitting. The intensity and frequency of pits increase as the copper content is increased and the pH value is decreased. Corrosion products formed on the zinc are predominantly a basic zinc carbonate, while copper is found in a coagulated form at the surface or embedded in the surface layer. The copper content of the corrosion products increases as the copper content of the water is increased and may attain up to 12.5%.
    Notes: Versuche mit Leitungswasser (65°C) mit Kupfergehalten von 0,1 bis 0,3 mg/l Cu2+ zeigen deutlich, daß Kupferionen die Korrosion der Rohrwände beschleunigen. Diese Korrosion hat Lochfraßcharakter. Die Intensität der Korrosion und die Lochzahl steigen mit zunehmendem Kupfergehalt und abnehmendem pH-Wert. Bei den auf Zink entstehenden Korrosionsprodukten handelt es sich im wesentlichen um ein basisches Zinkcarbonat; Kupfer findet sich in koagulierter Form an der Oberfläche oder eingebettet in der Deckschicht. Der Kupfergehalt der Korrosionsprodukte steigt mit dem Kupfergehalt im Wasser und kann bis 12,5% erreichen.
    Additional Material: 29 Ill.
    Type of Medium: Electronic Resource
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