Electrodeposition behavior of Zn-Ni Alloy from alkaline zincate solution

Hiroaki Nakano, Shingo Arakawa, Yuya Takada, Satoshi Oue, Shigeo Kobayashi

    研究成果: ジャーナルへの寄稿学術誌査読

    11 被引用数 (Scopus)

    抄録

    Electrodeposition behavior of Zn-Ni alloys was investigated at current densities of 10 to 500 A m- 2 and at amount of charge of 5 × 10 4 Cm -2 in unagitated zincate solution containing triethanolamine to form a stable complex with Ni 2+ ions at 308 K. At low current densities, the deposition of Zn-Ni alloy showed a normal type codeposition, in which electrochemically more noble Ni deposited preferentially, while at high current densities, it showed an anomalous codeposition, in which less noble Zn deposited preferentially. The Ni deposition and H 2 evolution were significantly suppressed in the region of anomalous codeposition at high current densities, showing the formation of inhibitor of deposition resulting from Zn ions in the cathode layer. In the region of nor-mal codeposition at low current densities, the underpotential deposition of Zn apparently occurred with Ni. Because the Zn-Ni alloys are composed of stable intermetallic compound of Ni 5Zn 21, the activity coefficient of Zn in deposit seems to decrease remarkably.

    本文言語英語
    ページ(範囲)443-448
    ページ数6
    ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    76
    7
    DOI
    出版ステータス出版済み - 7月 2012

    !!!All Science Journal Classification (ASJC) codes

    • 凝縮系物理学
    • 材料力学
    • 金属および合金
    • 材料化学

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