硫酸塩浴からのZn-Cr合金の電析過程 Electrodeposition Process of Zn-Cr Alloys from Sulfate Baths

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The electrodeposition of Zn-Cr alloys from sulfate baths was conducted to investigate the codeposition mechanism of Cr with Zn. Results are as follows:<br>(1) Cr was codeposited with Zn at high current densities in both polyethylene glycol (PEG)-free and PEG-containing baths. However, PEG made it possible to reduce Cr<sup>3+</sup> to metallic state and Cr existed in the form of Cr<sup>3+</sup> hydroxide in the deposits obtained in PEG-free bath.<br>(2) Partial polarization curves of Zn shifted when PEG was added to the baths.<br>(3) The pH in the cathode layer was found to rise from bulk pH 2.0 to about 4. Zn and Cr hydroxides seemed to form simultaneously in the cathode layer.<br>(4) It was estimated that alloys were electrodeposited from the composite Zn and Cr oxides formed due to the pH rise in the cathode layer and that the PEG acted as a polarizer to shift the cathode potential toward the reduction potential of Cr.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 47(10), 868-872, 1996-10 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002257322
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    4057357
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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