クエン酸を含有する硫酸塩浴からのZn電析の臨界電流密度 Critical Current Density for Zinc Deposition from Sulfate Baths Containing Sodium Citrate

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The critical current density at which massive Zn deposition began was measured in Zn and Zn-Ni alloy plating baths containing sodium citrate.<br>Results were as follows:<br>(1) The Zn deposition potential from citrate-containing baths was 0.1V less positive than from citrate-free baths, iudicating that citrate behaves as a complexing agent with Zn ion.<br>(2) Ni partial polarization curves also shifted to a less positive region with the addition of citrate in Ni and Zn-Ni alloy plating baths.<br>(3) The addition of sodium citrate and a decrease in pH in baths increased the Zn critical current density.<br>(4) pH in the cathode layer attained the value for Zn hydroxide formation at the critical current density in both citrate-containing and citrate-free baths.<br>Since the pH for Zn hydroxide formation is higher in citrate-containing than citrate-free baths, the critical current density at which adsorbed Zn hydroxide suppresses the hydrogen evolution rate to initiate massive Zn depositions is increased by the addition of citrate to baths.

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 48(6), 647-652, 1997-06-01 

    The Surface Finishing Society of Japan

参考文献:  16件

各種コード

  • NII論文ID(NAID)
    10002259291
  • 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
    4237644
  • 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  NDL  J-STAGE 
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