めっき亜鉛の結晶構造と表面形態に及ぼす光沢剤の影響

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タイトル別名
  • Effects of Brighteners on the Crystal Structure and Surface Morphology during Zinc Electroplating
  • メッキ アエン ノ ケッショウ コウゾウ ト ヒョウメン ケイタイ ニ オヨボス コウタクザイ ノ エイキョウ

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抄録

For zinc electroplated from a bath consisting of zinc chloride and ammonium chloride, we investigated the influence of some commercial brighteners on crystal growth and surface morphology. The bath was developed for formation of chrome (III) hydroxide type chemical conversion coatings, which contribute high corrosion resistance to zinc films. With increasing concentration of brighteners and cathode current density, the overpotential increased and the zinc deposits changed from a gray to a brighter appearance. Over the critical concentration of brighteners, zinc deposits invariably showed the preferred orientation of 10·1 plane and 10·0 plane in accordance with Pangarov's view. Especially, the latter plane might be a twin crystal formed along the twin boundary of the 10·2 plane on 00·1 plane of electroplated zinc. Increased concentration of the brighteners did not change the preferred orientation greatly, but it did reduce the grain size of zinc deposits.

収録刊行物

  • 表面技術

    表面技術 61 (8), 602-606, 2010

    一般社団法人 表面技術協会

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