Corrosion behavior of silver by outgassed sulfur species from vulcanized rubber (1) - Examination of corrosion factors -

Masataka Omoda, Oshika Taizo, Jun'ichi Sakai, Yuichi Ishikawa

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    Abstract

    Corrosion factors which influence the corrosion of silver by outgassed sulfur species from vulcanized rubber have been investigated by means of quartz crystal microbalance technique (QCM) and cathodic reduction technique. Silver sulfide was the only corrosion product identified during all the tests. Corrosion progressed linearly with time and the corrosion rate did not depend on humidity, but depended markedly on the temperature and the volume of rubber contained, In addition, it is clarified that the corrosion rate varies according to the types of rubber and even among various chroloprene products. Thus it is considered that the corrosion behavior of silver with vulcanized rubber is determined by the concentration of the sulfur gas species outgassed from the rubber. The free sulfur in the rubber is assumed to be the source. It may be suggested that the outgassing of sulfur gas is determined by diffusion of sulfur molecule Sx (x = 2-8) in the rubber and this diffusion process determined the corrosion rate of silver.

    Original languageEnglish
    Pages (from-to)358-365
    Number of pages8
    JournalZairyo to Kankyo/ Corrosion Engineering
    Volume57
    Issue number8
    DOIs
    Publication statusPublished - 2008 Aug

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    Keywords

    • Activation energy
    • Corrosion
    • Corrosion rate
    • Rate-determining process
    • Rubber
    • Silver

    ASJC Scopus subject areas

    • Electrochemistry
    • Materials Chemistry
    • Metals and Alloys
    • Surfaces, Coatings and Films

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