Electrodeposition of Zn–V Oxide Composites from a Strongly Agitated Solution without Dispersed Particles
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- Nakano Hiroaki
- Faculty of Engineering, Kyushu University
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- Oue Satoshi
- Faculty of Engineering, Kyushu University
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- Annoura Yasunori
- Formerly Graduate School of Engineering, Kyushu University
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- Nagai Takaaki
- Formerly Graduate School of Engineering, Kyushu University
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- Oho Naoto
- Graduate School of Engineering, Kyushu University
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- Fukushima Hisaaki
- Faculty of Engineering, Kyushu University
Abstract
The electrodeposition of a Zn–V oxide composite under galvanostatic conditions from an agitated sulfate solution without dispersed particles and containing Zn2+ and VO2+ at pH 2 and 313 K was investigated. Although the V content in the deposits initially decreased with increasing current density, irrespective of the flow rate of electrolyte, a further increase in the current density resulted in an increase in the V content of the deposits. The curves, which show the relationship between the V content in the deposits and the current density, shifted to the higher-current-density region with increasing flow rate of the electrolyte. Agitation of the electrolyte decreased the V content of the deposits but reduced the segregation of V oxide. EDX point analysis of the cross-section of the deposits revealed that the V oxide concentrated at the surface of the deposits. The polarization curves in 3% NaCl solution revealed that the corrosion potential of the deposited Zn–V oxide films depended on the V content in the deposits, irrespective of the flow rate of electrolyte, and that the corrosion potential shifted toward the more noble direction with the codeposition of V oxide when the V content in the deposits was less than 2 mass%. At V contents of <4 mass%, the corrosion current density of the deposits decreased with increasing V content. The corrosion current densities of the deposits obtained from agitated solutions were smaller than those of the deposits obtained from unagitated solutions.
Journal
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- ISIJ International
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ISIJ International 54 (8), 1906-1912, 2014
The Iron and Steel Institute of Japan
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Keywords
Details
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- CRID
- 1390282681465958272
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- NII Article ID
- 130004685087
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- COI
- 1:CAS:528:DC%2BC2cXhsVCiu7bL
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- ISSN
- 13475460
- 09151559
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed