Correspondence between electrochemical fluctuations and phenomenon for localized corrosion of less-noble metals

Stuart Lyon, Yasuhiko Itoi, Seisho Take

    Research output: Chapter in Book/Conference proceedingChapter

    Abstract

    The application of electrochemical noise (Fluctuation) analysis for localized corrosion have been studied. Foils of zinc, aluminum and magnesium were used as specimens for electrochemical cell simulating localized corrosion. Time variations of short circuited potential and current were measured in these solutions, and simultaneously the surfaces of specimens were observed using microscope with television monitor. Two types fluctuation were detected. In the case of aluminum and magnesium, It was seemed that the fluctuations result from hydrogen evolution on the active site in the crevice. In the case of magnesium, fluctuations appeared on the trendy component of the corrosion potential. And that was random one. It was seemed that these fluctuations result from the hydrogen evolution on the active site in the crevice of magnesium from the microscopic observation. In the case of zinc, It was seemed that the fluctuations result from the dissolution on the active site in the crevice and generation of corrosion products on the cathodic site on the outer site. ©The Electrochemical Society.
    Original languageEnglish
    Title of host publicationECS Transactions|ECS Transactions
    Subtitle of host publicationVolume 3: Corrosion and Degradation of Engineering Materials
    PublisherElsevier BV
    Pages3-8
    Number of pages5
    Volume16
    Publication statusPublished - 2009
    EventCorrosion in Marine and Saltwater Environments 3 - 214th ECS Meeting - Honolulu, HI
    Duration: 1 Jul 2009 → …

    Other

    OtherCorrosion in Marine and Saltwater Environments 3 - 214th ECS Meeting
    CityHonolulu, HI
    Period1/07/09 → …

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