• Title/Summary/Keyword: tin-cobalt alloy plating

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Plating Solution Composition Control of Tin-Cobalt Alloy Electroplating Process (Tin-Cobalt 합금 도금공정에서 도금물성 향상을 위한 최적 용액조성 디자인)

  • Lee, Seung-Bum;Hong, In-Kwon
    • Applied Chemistry for Engineering
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    • v.17 no.2
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    • pp.150-157
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    • 2006

  • The alternate plating method was suggested by a tin-cobalt alloy plating process which has excellent mechanical characteristics and also favorable to environment. Tin-cobalt alloy plating has many advantages such as nontoxicity, variable color-tone, and no post-treatment process. In this study, the plating conditions such as temperature, pH, current density, plating time, and amount of additive (glycine) were determined in the tin-cobalt alloy plating process through Hull-cell test and surface analysis. As the result of Hull-cell analysis, brightness became superior as the amount of glycine increased. It was found that the optimum alloy ratio was 0.03 M of $SnCl_{2}{\cdot}2H_{2}O$ and 0.05 M of $CoSO_{4}{\cdot}7H_{2}O$ at $50^{\circ}C$, pH 8.5, and $0.5A/dm^2$. The optimum amount of additive was 15 g/L of glycine and 0.1 g/L of organic acid. Then, the solution including glycine was recommended as an optimum plating solution for a chromium plating process.

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