为了制备色泽纯正的仿金层,且满足工艺操作简单、对环境污染小的要求,采用化学镀镍与化学浸镀仿金相结合的方法在A3钢表面制备仿金层,探讨了化学浸镀仿金液的组成、温度及施镀时间对仿金层色泽和附着力以及仿金液稳定性的影响.结果表明:最佳工艺为6～8 g/L SnSO4,5～8g/L CuSO4·5H2O,10～20 g/L配位剂,10～25 mL/L H2SO4,5～10 mL/L稳定剂,温度15～35℃,时间3～5 min;仿金镀层色泽均匀,装饰效果好,且工艺操作简单,镀液无毒,对环境污染小.
Electroless nickel plating technique was combined with electroless imitation gold plating technique to prepare gold-imitation layer on A3 steel. The effects of the composition of gold-imitation bath, temperature and time on the color and adhesion of gold-imitation layer and stabili-ty of gold- imitation bath were investigated. As the results, the optimized bath for electroless imitation gold plating was composed of 6 ～8 g/L SnSO4 ,5 ～8 g/L CuSO4 · 5H2O, 10 ～20 g/L che-lating agent, 10 ～ 25 mL/L H2SO4 and 5 ～ 10 mL/L stabilizer,and the optimized temperature and time were 15 ～ 35 °C and 3 ～5 min respectively. The resulting gold-imitation layer had uniform color and good decoration efficacy as well. Moreover, the tech-nology had advantages of simple operation, non- toxic bath and little environmental pollution.
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