Electrodeposition of zinc-nickel alloy from a cyanide-free alkaline plating bath

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作者：
机构：
[1] Rajendran, S.
[2] Bharathi, S.
[3] Vasudevan, T.
来源：
Rajendran, S. | 2000年 / Inst of Metal Finishing, Birmingham, United Kingdom卷 / 78期
关键词：
Chemical modification - Chromate coatings - Composition - Corrosion resistance - Current density - Electroplating - Nickel - pH - Protective coatings - Sodium compounds - Surface structure;
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摘要：
Zinc-nickel alloy coating having 8-10% nickel has been deposited from a conventional non-cyanide alkaline zinc plating bath containing Zn, NaOH, and proprietary addition agents. The alloying element, nickel, is added to the bath with a weak complexing agent. The influence of the plating bath and process variables such as temperature, agitation and current density on zinc-nickel alloy deposition have been studied in detail. The deposit characteristics and corrosion resistance of Zn-Ni alloy coating are evaluated and compared with conventional alkaline zinc. Zinc-nickel alloy accepts all conventional chromate conversion coatings with minor modifications in composition, pH and time.
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