パルスめっきによる亜鉛の電析形態

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書誌事項

タイトル別名
  • Morphology of Pulse-Plated Zinc Deposit
  • パルス メッキ ニヨル アエン ノ デンセキ ケイタイ

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抄録

The morphology of pulse electrodeposited zinc from acidic zinc sulfate baths without the presence of additives has been studied by means of scanning electron microscopy and X-ray diffraction. The zinc deposit exhibited a bright smooth surface at an appropriate pulse condition. The current efficiency of this pulse plating increased beyond that of d-c plating with increasing the average current density at low duty cycles. The grain size of zinc deposit was also dependent on the average current density and pulse time. It decreases with increasing the average current density. At constant average current density and pulse width, the grain size decreased with decreasing the duty cycle. The reduction of grain size at appropriate pulse condition was explained in terms of an enhanced nucleation rate resulting from high overpotential attainable in pulse plating. The preferred orientation of the zinc deposit changed with increasing the average current density in the order [0001], [1120] and [1010], which is consistent with that of Pangarov's theory based on nucleation energetics.

収録刊行物

  • 金属表面技術

    金属表面技術 34 (8), 428-433, 1983

    一般社団法人 表面技術協会

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