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采用电镀的方法制备出Ni-WC纳米复合镀层,镀液组成为:NiSO4·7H2O250g/L,NiCl2·6H2O30g/L,H3BO330g/L,光亮剂0.1g/L,纳米WC颗粒5～30g/L,表面活性剂及分散剂适量。研究了温度、电流密度及pH对复合镀层外观的影响,得到最佳电镀工艺条件为:温度50～55°C,电流密度2～4A/dm2,pH4.5～5.0。在最佳工艺条件下制得的复合镀层,其显微硬度明显高于纯镍镀层和不锈钢,耐磨蚀性也优于不锈钢和纯镍镀层,耐腐蚀性优于不锈钢而劣于纯镍镀层。
Ni-WC nanocomposite coating was prepared by electroplating method. The bath consisted of NiSO4 · 7H2O250g / L, NiCl2 · 6H2O30g / L, H3BO330g / L, brightener 0.1g / L, nano-WC particles 5-30g / Surfactants and dispersants appropriate. The effects of temperature, current density and pH on the appearance of the composite coating were studied. The optimum electroplating conditions were as follows: temperature 50 ~ 55 ° C, current density 2 ~ 4A / dm2, pH 4.5 ~ 5.0. The composite coatings prepared under the best technological conditions have a significantly higher microhardness than pure nickel coatings and stainless steel and have better abrasion resistance than stainless steel and pure nickel coatings. The corrosion resistance of the composite coatings is better than that of stainless steel and inferior to pure nickel coatings .