Effect of equal-channel angular pressing on the pitting corrosion resistance of Al alloy

In Joon Son, Hiroaki Nakano, Satoshi Oue, Shigeo Kobayashi, Hisaaki Fukushima, Zenji Horita

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Citations (Scopus)

    Abstract

    The effect of equal-channel angular pressing (ECAP) on the pitting corrosion resistance of Al and Al-Mg alloy was investigated by means of polarization curves in solutions containing 300 ppm of Cl-1 and by surface analysis. The potentials for pitting corrosion of Al and Al-Mg alloy were evidently shifted to the noble direction by using the ECAP process, indicating that this process improves resistance to pitting corrosion. This increase in resistance seems to be attributable to the increase in formation rate of Al oxide films due to the increase in grain boundary with ECAP. The pitting corrosion resistance of Al and Al-Mg alloy anodized galvanostatically in H2SO4 solution after ECAP was also investigated using electrochemical techniques. The pitting corrosion resistance of Al and Al-Mg alloy was remarkably improved by anodizing. However, the pitting corrosion resistance of anodized Al-Mg alloy was better without ECAP than with ECAP.

    Original languageEnglish
    Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
    Pages487-492
    Number of pages6
    Publication statusPublished - Dec 1 2006
    Event3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan
    Duration: Sep 22 2005Sep 26 2005

    Publication series

    NameMaterials Science Forum
    Volume503-504
    ISSN (Print)0255-5476

    Other

    Other3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
    Country/TerritoryJapan
    CityFukuoka
    Period9/22/059/26/05

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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