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Study of Ni-coating on 316L Stainless Steel by Pulse Electroplating in Various Bath Conditions at Room Temperature  

정세진 (영남대학교 재료금속공학부)
조계현 (영남대학교 재료금속공학부)
Publication Information
Journal of the Korean institute of surface engineering / v.35, no.1, 2002 , pp. 53-63 More about this Journal
Abstract
Ni coating was carried out by pulse plating at room temperature. So, experimental conditions for Ni-coating were based on Watt's bath, and new additives(propionic acid) were introduced in the Watt's bath electrolyte as $H_3$$BO_3$ alternatives. By adding propionic acid, coating layer demonstrated a good adhesion and uniformity without special pre-treatment of the 316L stainless steel at room temperature. With a decrease of amount of propionic acid and applied average current density, cathode current efficiency increased. Also, edge effect was decreased with decreasing a peak current and increasing a pulse frequency in the same bath condition. It was found that the optimum condition for Ni coating was a current density of 10~20mA/$\textrm{cm}^2$ at below 500 mA peak current in the $5m\ell/\ell$ propionic acid solution.
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