Journal of the Korean institute of surface engineering (한국표면공학회지)
- Volume 34 Issue 6
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- Pages.537-544
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- 2001
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- 1225-8024(pISSN)
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- 2288-8403(eISSN)
Effect of Deposit Conditions on Composition of Sn-Zn Alloy Deposits
Sn-Zn합금도금 조성에 미치는 도금조건의 영향
Abstract
In the present study, tin-zinc alloys were coated on a cold-rolled steel sheet with variations of electrolyte concentration, additives quantity and current density employing the Hull cell and circulation cell simulator. With an addition of additives of 2m1/L, tin-zinc deposits containing 10 to 40 percent Zn revealed a good surface appearance with weak acidic electrolytes. The organic additives suppressed the Sn deposition rate and thus increased the zinc contents in tin-zinc coating layers. The zinc contents in the tin-zinc coating layers depended almost linearly on the concentrations of metal ions of tin and zinc. Temperature of the electrolyte affected the composition tin-zinc coating layer. However, the concentration of complexants revealed little effectiveness. The surface morphology of tin-zinc coating showed dense tin and zinc phases with fine equiaxed grains with the high current density.
Keywords