Effect of Pb on the electrodeposition behavior of Zn-Ni alloy

Masaaki Yano, Hisaaki Fukushima, Hiroaki Nakano, Tetsuya Akiyama

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    4 Citations (Scopus)

    Abstract

    The effect of Pb in the bath on the electrodeposition behavior of Zn-Ni alloys in sulfate type baths was investigated for the hydroxide suppression mechanism. In the presence of Pb in the bath, the transition current density where codeposition behavior changes from normal type to anomalous type was increased. This increase can be explained by the following two factors, one is the current density which is equal to reduction rate from Pb2+ ion to Pb as metal, another is the increase of apparent current density because of rough deposits on the electrode surface. The Ni content in deposits increased in the region II where anomalous type codeposition occurred with high current efficiency. This phenomenon appears to have been caused by the metal Pb electrodeposition continuously supplying activation sites for electrodeposition of Ni, which is not blocked in Zn hydroxides, thus accelerating the rate of electrodeposition of Ni, compared to that of Zn.

    Original languageEnglish
    Pages (from-to)176-180
    Number of pages5
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Volume86
    Issue number3
    DOIs
    Publication statusPublished - 2000

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Metals and Alloys
    • Materials Chemistry

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