Electrodeposition of composites of zinc with vanadium oxide from sulfate solutions

Hiroaki Nakano, Satoshi Oue, Daisuke Kozaki, Shigeo Kobayashi, Hisaaki Fukushima

    研究成果: Contribution to journalArticle査読

    7 被引用数 (Scopus)

    抄録

    Electrodeposition of Zn with V was examined from optionally agitated sulfate solutions containing Zn2+ and VO2+ at pH 0-3 and 40°C under galvanostatic conditions. XPS spectra of the deposits showed that V was present in the deposited Zn in the form of its oxide, formed by hydrolysis of V ions. The V content of the deposits increased with increasing pH of the solution and increasing current density. These conditions appear to accelerate the hydrolysis of V ions by means of an increase in hydrogen evolution in the cathode layer. SEM and EPMA studies of the deposits showed that the V in the deposits was segregated at the edges of layered platelet crystals of Zn. Agitation of the electrolyte decreased the V content of the deposits but reduced the segregation of V oxide. Anodic polarization curves for dissolution of Zn in 3 % NaCI solution were polarized by codeposition of V oxide with Zn for V contents of <5 mass%. The corrosion current densities of deposits obtained from agitated solutions were smaller than those from un-agitated solutions.

    本文言語英語
    ページ(範囲)506-511
    ページ数6
    ジャーナルisij international
    48
    4
    DOI
    出版ステータス出版済み - 2008

    All Science Journal Classification (ASJC) codes

    • 材料力学
    • 機械工学
    • 金属および合金
    • 材料化学

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