Zn/Ni Electrodeposition on Low Carbon Steel Substrate

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著者

    • OHTSUBO Hiroyuki
    • Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
    • NAKAI Kiyomichi
    • Department of Materials Science and Engineering, Faculty of Engineering, Ehime University
    • OHMORI Yasuya
    • Department of Materials Science and Engineering, Faculty of Engineering, Ehime University

抄録

Zn/Ni alloy electrodeposition on a low carbon steel sheets has been examined by means of X-ray diffraction and scanning electron microscopy. <br>With increasing current density, Ni content in a Zn/Ni film deposited decreases to a minimum value and then increases. This variation of Ni content in lower Ni baths corresponds to the morphological change of the deposits from granular η/γ mixed phases to layered hexagonal η-phase plates. But in the case of higher Ni baths, the deposited films comprise both η- and γ-phases, and the morphology varies from fine granular precipitates to large spherical particles consisting of granular precipitates. The <i>c/a</i> ratio of η-phase crystal varies from 1.87 to 1.75 with increasing the supersaturation of Ni atoms in η-phase deposits. The effects of quantity of electricity on Ni content of the deposits can be explained in terms of the variation of surface area of the deposits.

収録刊行物

  • ISIJ international

    ISIJ international 37(5), 512-518, 1997-05-15

    The Iron and Steel Institute of Japan

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