化学镀镍铜磷在钕铁硼表面处理上的应用研究

为提高钕铁硼表面镀层的耐蚀性，使其具有更高的经济附加值，采用在化学镀镍磷合金液中添加适量的铜离子及其复合络合剂，制得镍铜磷三元合金。研究了镍离子、铜离子、次亚磷酸钠、复合络合剂添加量，沉积温度、pH值对合金镀层沉积速度的影响。利用中性盐雾试验比较了其与电镀镍、化学镀镍磷合金的耐蚀性能。结果表明：化学镀镍铜磷合金能明显提高钕铁硼表面处理后的耐蚀能力。

Study of Electroless Ni-Cu-P In NdFeB Surface Treatment

The purpose of this study is to improve NdFeB surface plating corrosive resistance and additional economic value.Electroless Ni-Cu-P ternary alloy deposits are prepared by addition of cupric sulfate and complex in eletroless Ni-P alloy plating bath.The effect of nickel copper,concentration of sodium hypophoshite,complex,deposition temperature and pH on alloy deposition rate are studied.The corrosion resistance of electroless Ni-Cu-P alloy deposits are compared with that electroplating Ni and electroless Ni-P alloy deposits by corrosion tests.The results indicate that NdFeB layer are greatly improved in corrosion resistance by electroless Ni-Cu-P ternary alloy.