ニッケルめっき膜の引張応力に及ぼすクロム(III)イオンの影響 Effects of Chromium (III) Ions in the Plating Bath on Internal Tensile Stress in Nickel Deposits

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A study of the effects of chromium (III) ion added as CrK(SO<sub>4</sub>)<sub>2</sub> on average internal tensile stress in nickel deposits electroplated from a Watts bath of pH3.0 enabled us to detect variations in elastic deformation in deposits <i>in situ</i> using a resistance wire strain gauge on the reverse side of a copper electrode.<br>Chromium (III) ions close to the electrode surface changed to chromium hydroxide due to increased solution pH during nickel electroplating with hydrogen evolution. This is included in deposits as chromium oxide and chromium hydroxide.<br>With increasing CrK(SO<sub>4</sub>)<sub>2</sub> concentration, total chromium oxide and chromium hydroxide in deposits increased and average internal tensile stress in deposits also rose. Internal tensile stress rose markedly at 1.5mM CrK(SO<sub>4</sub>)<sub>2</sub>, causing numerous cracks on the surface of nickel deposits at a concentration of 2.0 to 10.0mM CrK(SO<sub>4</sub>)<sub>2</sub>. The dependence of chromium oxide and chromium hydroxide content on CrK(SO<sub>4</sub>)<sub>2</sub> concentration showed that these two compounds greatly enhance internal tensile stress in nickel deposits.

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 50(2), 202-207, 1999-02-01 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002111896
  • 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
    4658142
  • 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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