Mechanism of the Electrodeposition of Zinc with Iron-Group Metals from Sulfate Baths

Hisaaki Fukushima; Tetsuya Akiyama; Jae-ha Lee; Masahiko Yamaguchi; Kei Higashi

doi:10.2320/matertrans1960.24.125

Hisaaki Fukushima, Tetsuya Akiyama, Jae-ha Lee, Masahiko Yamaguchi, Kei Higashi

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Keywords: electrodeposition, zinc-iron alloy, zinc-nickel alloy, zinc-cobalt alloy, anomalous codeposition, surface pH, film resistance

JOURNAL FREE ACCESS

1983 Volume 24 Issue 3 Pages 125-131

DOI https://doi.org/10.2320/matertrans1960.24.125

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Abstract

Binary alloys of Zn with iron-group metals were electrodeposited from sulfate solutions under galvanostatic conditions. In a wide range of plating conditions, anomalous codepositions, and hence a preferential deposition of electrochemically less noble Zn occurred. Evaluation of the pH in the vicinity of cathode and of the surface film resistance revealed the mechanism of anomalous codeposition including the formation of Zn hydroxide resulting from the rise in the pH in the vicinity of cathode.

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