Codeposition behavior of impurities during electrogalvanization in sulfate baths in the presence of Fe ions

Hiroaki Nakano; Satoshi Oue; Shoji Hisano; Shigeo Kobayashi; Hisaaki Fukushima

doi:10.2355/isijinternational.47.1029

Codeposition behavior of impurities during electrogalvanization in sulfate baths in the presence of Fe ions

Hiroaki Nakano, Satoshi Oue, Shoji Hisano, Shigeo Kobayashi, Hisaaki Fukushima

Material process engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The codeposition behavior of impurity Fe with Zn was investigated galvanostatically over the current density range 1-1000A/m² at 40°C In zinc sulfate solutions of pH 3 containing 5 000 ppm of Fe ²⁺ and other organic or inorganic impurities. Fe showed hardly any codeposition with Zn In solutions containing Fe and either Mo or Ni as impurities. The codeposition of Fe is strongly suppressed in the presence of Zn²⁺ ions through preferential adsorption of Zn hydroxide on the cathode. In solutions containing Fe and Cu, Fe codeposited with Zn and the Fe content in the deposit decreased with increasing current density. Codeposited Cu promotes Fe deposition by providing active sites that are free of adsorbed Zn hydroxide, In solutions containing Fe and benzyl(dimethyl)(stearyl)ammonium chloride (C18-Benzyl) as an impurity, significant amounts of Fe were codeposited. The cathode potential for Zn deposition was greatly polarized by addition of C18-Benzyl, and the Fe content In deposits increased with increasing current density.

Original language	English
Pages (from-to)	1029-1033
Number of pages	5
Journal	isij international
Volume	47
Issue number	7
DOIs	https://doi.org/10.2355/isijinternational.47.1029
Publication status	Published - Sep 17 2007

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Codeposition behavior of impurities during electrogalvanization in sulfate baths in the presence of Fe ions",

abstract = "The codeposition behavior of impurity Fe with Zn was investigated galvanostatically over the current density range 1-1000A/m2 at 40°C In zinc sulfate solutions of pH 3 containing 5 000 ppm of Fe 2+ and other organic or inorganic impurities. Fe showed hardly any codeposition with Zn In solutions containing Fe and either Mo or Ni as impurities. The codeposition of Fe is strongly suppressed in the presence of Zn2+ ions through preferential adsorption of Zn hydroxide on the cathode. In solutions containing Fe and Cu, Fe codeposited with Zn and the Fe content in the deposit decreased with increasing current density. Codeposited Cu promotes Fe deposition by providing active sites that are free of adsorbed Zn hydroxide, In solutions containing Fe and benzyl(dimethyl)(stearyl)ammonium chloride (C18-Benzyl) as an impurity, significant amounts of Fe were codeposited. The cathode potential for Zn deposition was greatly polarized by addition of C18-Benzyl, and the Fe content In deposits increased with increasing current density.",

author = "Hiroaki Nakano and Satoshi Oue and Shoji Hisano and Shigeo Kobayashi and Hisaaki Fukushima",

year = "2007",

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T1 - Codeposition behavior of impurities during electrogalvanization in sulfate baths in the presence of Fe ions

AU - Nakano, Hiroaki

AU - Oue, Satoshi

AU - Hisano, Shoji

AU - Kobayashi, Shigeo

AU - Fukushima, Hisaaki

PY - 2007/9/17

Y1 - 2007/9/17

N2 - The codeposition behavior of impurity Fe with Zn was investigated galvanostatically over the current density range 1-1000A/m2 at 40°C In zinc sulfate solutions of pH 3 containing 5 000 ppm of Fe 2+ and other organic or inorganic impurities. Fe showed hardly any codeposition with Zn In solutions containing Fe and either Mo or Ni as impurities. The codeposition of Fe is strongly suppressed in the presence of Zn2+ ions through preferential adsorption of Zn hydroxide on the cathode. In solutions containing Fe and Cu, Fe codeposited with Zn and the Fe content in the deposit decreased with increasing current density. Codeposited Cu promotes Fe deposition by providing active sites that are free of adsorbed Zn hydroxide, In solutions containing Fe and benzyl(dimethyl)(stearyl)ammonium chloride (C18-Benzyl) as an impurity, significant amounts of Fe were codeposited. The cathode potential for Zn deposition was greatly polarized by addition of C18-Benzyl, and the Fe content In deposits increased with increasing current density.

AB - The codeposition behavior of impurity Fe with Zn was investigated galvanostatically over the current density range 1-1000A/m2 at 40°C In zinc sulfate solutions of pH 3 containing 5 000 ppm of Fe 2+ and other organic or inorganic impurities. Fe showed hardly any codeposition with Zn In solutions containing Fe and either Mo or Ni as impurities. The codeposition of Fe is strongly suppressed in the presence of Zn2+ ions through preferential adsorption of Zn hydroxide on the cathode. In solutions containing Fe and Cu, Fe codeposited with Zn and the Fe content in the deposit decreased with increasing current density. Codeposited Cu promotes Fe deposition by providing active sites that are free of adsorbed Zn hydroxide, In solutions containing Fe and benzyl(dimethyl)(stearyl)ammonium chloride (C18-Benzyl) as an impurity, significant amounts of Fe were codeposited. The cathode potential for Zn deposition was greatly polarized by addition of C18-Benzyl, and the Fe content In deposits increased with increasing current density.

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