Electrodeposition behavior of a Zn-Ni alloy in an alkaline zincate solution

Hiroaki Nakano, Shingo Arakawa, Yuya Takada, Satoshi Oue, Shigeo Kobayashi

研究成果: ジャーナルへの寄稿記事

5 引用 (Scopus)

抄録

Electrodeposition behavior of Zn-Ni alloys was investigated at current densities of 10-500 A·m -2 and a charge of 5 × 10 4C·m -2 in an unagitated zincate solution containing triethanolamine, which forms a stable complex with Ni 2+ ions at 308K. At low current densities, the Zn-Ni alloy exhibited normal codeposition, wherein electrochemically more noble Ni deposited preferentially, while at high current densities, it exhibited anomalous codeposition, wherein less noble Zn deposited preferentially. Ni deposition and H 2 evolution were significantly suppressed in the region of anomalous codeposition at higher current densities, showing the formation of an inhibitor for deposition, which results from Zn 2+ ions in the cathode layer. In contrast, in the region of normal codeposition at lower current densities, the underpotential deposition of Zn apparently occurred with Ni. Because Zn-Ni alloys are composed of a stable intermetallic compound of Ni 5Zn 21, the activity coefficient of Zn in the deposit appears to decrease remarkably.

元の言語英語
ページ(範囲)1946-1951
ページ数6
ジャーナルMaterials Transactions
53
発行部数11
DOI
出版物ステータス出版済み - 11 5 2012

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Electrodeposition
electrodeposition
Current density
current density
low currents
high current
Ions
Triethanolamine
Activity coefficients
inhibitors
Intermetallics
intermetallics
ions
Cathodes
Deposits
cathodes
deposits
coefficients

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Electrodeposition behavior of a Zn-Ni alloy in an alkaline zincate solution. / Nakano, Hiroaki; Arakawa, Shingo; Takada, Yuya; Oue, Satoshi; Kobayashi, Shigeo.

:: Materials Transactions, 巻 53, 番号 11, 05.11.2012, p. 1946-1951.

研究成果: ジャーナルへの寄稿記事

Nakano, Hiroaki ; Arakawa, Shingo ; Takada, Yuya ; Oue, Satoshi ; Kobayashi, Shigeo. / Electrodeposition behavior of a Zn-Ni alloy in an alkaline zincate solution. :: Materials Transactions. 2012 ; 巻 53, 番号 11. pp. 1946-1951.
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abstract = "Electrodeposition behavior of Zn-Ni alloys was investigated at current densities of 10-500 A·m -2 and a charge of 5 × 10 4C·m -2 in an unagitated zincate solution containing triethanolamine, which forms a stable complex with Ni 2+ ions at 308K. At low current densities, the Zn-Ni alloy exhibited normal codeposition, wherein electrochemically more noble Ni deposited preferentially, while at high current densities, it exhibited anomalous codeposition, wherein less noble Zn deposited preferentially. Ni deposition and H 2 evolution were significantly suppressed in the region of anomalous codeposition at higher current densities, showing the formation of an inhibitor for deposition, which results from Zn 2+ ions in the cathode layer. In contrast, in the region of normal codeposition at lower current densities, the underpotential deposition of Zn apparently occurred with Ni. Because Zn-Ni alloys are composed of a stable intermetallic compound of Ni 5Zn 21, the activity coefficient of Zn in the deposit appears to decrease remarkably.",
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N2 - Electrodeposition behavior of Zn-Ni alloys was investigated at current densities of 10-500 A·m -2 and a charge of 5 × 10 4C·m -2 in an unagitated zincate solution containing triethanolamine, which forms a stable complex with Ni 2+ ions at 308K. At low current densities, the Zn-Ni alloy exhibited normal codeposition, wherein electrochemically more noble Ni deposited preferentially, while at high current densities, it exhibited anomalous codeposition, wherein less noble Zn deposited preferentially. Ni deposition and H 2 evolution were significantly suppressed in the region of anomalous codeposition at higher current densities, showing the formation of an inhibitor for deposition, which results from Zn 2+ ions in the cathode layer. In contrast, in the region of normal codeposition at lower current densities, the underpotential deposition of Zn apparently occurred with Ni. Because Zn-Ni alloys are composed of a stable intermetallic compound of Ni 5Zn 21, the activity coefficient of Zn in the deposit appears to decrease remarkably.

AB - Electrodeposition behavior of Zn-Ni alloys was investigated at current densities of 10-500 A·m -2 and a charge of 5 × 10 4C·m -2 in an unagitated zincate solution containing triethanolamine, which forms a stable complex with Ni 2+ ions at 308K. At low current densities, the Zn-Ni alloy exhibited normal codeposition, wherein electrochemically more noble Ni deposited preferentially, while at high current densities, it exhibited anomalous codeposition, wherein less noble Zn deposited preferentially. Ni deposition and H 2 evolution were significantly suppressed in the region of anomalous codeposition at higher current densities, showing the formation of an inhibitor for deposition, which results from Zn 2+ ions in the cathode layer. In contrast, in the region of normal codeposition at lower current densities, the underpotential deposition of Zn apparently occurred with Ni. Because Zn-Ni alloys are composed of a stable intermetallic compound of Ni 5Zn 21, the activity coefficient of Zn in the deposit appears to decrease remarkably.

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