Electrodeposition of composites of zinc with vanadium oxide from sulfate solutions

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

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)506-511
Number of pages6
Journalisij international
Volume48
Issue number4
DOIs
Publication statusPublished - Jul 14 2008

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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