Mg-6%Al合金銅型鋳造材のNaCl水溶液中での電気化学的特性に及ぼすミクロ組織の影響  [in Japanese] Effect of microstructure on electrochemical characteristics in NaCl solution for Mg-6%Al alloy copper mold castings  [in Japanese]

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Author(s)

Abstract

Magnesium alloys are remarkably corroded in chloride environments. The fundamental corrosion behavior of Mg–6 mass% Al alloy cast into copper mold has been conducted through the polarization test and electrochemical impedance spectroscopy. Metallographic characteristics were evaluated by optical microscopy using the sample in the condition of as cast, as solution-treated, as under-aged for 172.8 ks and as over-aged for 864 ks. Corrosion potential was different from microstructure in Mg–6 mass% Al copper mold castings with same composition. Pitting potential was equal in Mg–6 mass% Al alloy castings with different microstructure, and the protection film dissolution potential was same. Charge transfer resistance of Mg–6 mass% Al alloy with single phase microstructure in the condition of as solution-treated and as over-aged was large, on the other hand, with double phase microstructure in the condition of as cast and as under-aged was small.

Journal

  • Journal of Japan Institute of Light Metals

    Journal of Japan Institute of Light Metals 62(1), 14-20, 2012-01-30

    The Japan Institute of Light Metals

References:  52

Codes

  • NII Article ID (NAID)
    10030597659
  • NII NACSIS-CAT ID (NCID)
    AN00069773
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    04515994
  • NDL Article ID
    023404835
  • NDL Call No.
    Z17-284
  • Data Source
    CJP  NDL  J-STAGE 
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