纳米碳化硅复合化学镀镍-磷合金工艺

以硫酸镍为主盐,次磷酸钠为还原剂,在铁基体上进行了化学镀Ni-P-纳米SiC.研究了镀液温度、pH及硫酸镍质量浓度对镀速的影响,得到较佳工艺条件如下:硫酸镍24～26 g/L,次磷酸钠20～35g/L,柠檬酸10～20 g/L,醋酸钠10～15 g/L,丁二酸钠2～4 g/L,纳米SiC粉体0.6g/L,pH 4.1～...

Process of electroless Ni-P-nano-SiC plating

The electroless Ni-P-nano-SiC plating was carried out on iron using nickel sulfate as main salt and sodium hypophosphite as reducing agent.The effects of mass concentration of nickel sulfate,bath temperature and pH on deposition rate were studied.The optimal process conditions are as follows:nickel sulfate 24-26 g/L,sodium hypophosphite 20-35 g/L,citric acid 10-20 g/L,sodium acetate 10-15 g/L,sodium succinate 2-4 g/L,nano-SiC 0.6 g/L,pH 4.1-4.8 and bath temperature 80-85 °C.The results showed that the Ni-P-nano-SiC composite coating is amorphous and has a much higher corrosion resistance than a Ni-P alloy coating.