強加工により結晶粒を微細化したアルミニウムの耐孔食性 Pitting Corrosion Resistance of Ultrafine-Grained Aluminum Processed by Severe Plastic Deformation

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著者

    • 孫 仁俊 SON In-Joon
    • 九州大学大学院工学府物質プロセス工学専攻 Department of Materials Process Engineering, Kyushu University
    • 中野 博昭 NAKANO Hiroaki
    • 九州大学大学院工学研究院材料工学部門 Department of Materials Science & Engineering, Kyushu University
    • 大上 悟 [他] OUE Satoshi
    • 九州大学大学院工学研究院材料工学部門 Department of Materials Science & Engineering, Kyushu University
    • 堀田 善治 HORITA Zenji
    • 九州大学大学院工学研究院材料工学部門 Department of Materials Science & Engineering, Kyushu University

抄録

  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<sup>-</sup> and by surface analysis. The potentials for pitting corrosion of Al and Al-Mg alloy were evidently shifted to the noble direction by ECAP process, indicating that this process improves resistance to pitting corrosion. SEM observation revealed that the pitting corrosion occurred near the impurity precipitates and the size of impurity precipitated decreased with ECAP process. The time-dependence of corrosion potential and the polarization resistance determined by AC impedance technique suggested that the formation rate of Al oxide films was increased with ECAP process. The improvement in pitting corrosion resistance of Al and Al-Mg by ECAP seems to be attributable to the decrease in the size of impurity precipitates and the increase in the formation rate of Al oxide films.<br>

収録刊行物

  • 日本金屬學會誌 = Journal of the Japan Institute of Metals  

    日本金屬學會誌 = Journal of the Japan Institute of Metals 69(10), 892-898, 2005-10-20 

    The Japan Institute of Metals

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各種コード

  • NII論文ID(NAID)
    10018277247
  • NII書誌ID(NCID)
    AN00062446
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00214876
  • NDL 記事登録ID
    7712027
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-314
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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