Abstract: Ni-Cu-P ternary alloy plating was made by electroless plating technology in the surface of 20R steel for improving corrosion resistance of 20R steel in hydrofluoric acid.The surface morphology and structure of the coating were observed and tested through metallography and X-ray diffraction technique.The corrosion behavior of 20R steel and the coating was tested by immersion method and electrochemical system in hydrofluoric acid solution.The results show that:Ni- Cu-P coating can deposit smoothly in the surface of 20R steel.The coating is smooth,compact and crack free and has prevented 20R steel from contacting hydrofluoric acid directly.The coating is much easier to passivate in hydrofluoric acid solution.Thus,the coating has corrosion resistance to some extent.

Key words: Electroless plating,    , Nickel-copper-phosphorus coating,    , Hydrofluoric acid,    , Corrosion resistance

摘要： 为了改善20R钢在氢氟酸介质中的耐蚀性,采用化学镀技术在该材料表面制备了Ni-Cu-P三元合金镀层。通过金相显微镜和X射线衍射观察和分析了镀层的表面形貌和组成,通过浸泡法、电化学系统测试了20R钢和镀层在氢氟酸溶液中的腐蚀性能。结果表明:Ni-Cu-P镀层能顺利地在20R钢表面发生沉积,镀层光滑、致密、无裂纹,阻隔了氢氟酸与20R钢的直接接触。镀层在氢氟酸溶液中更容易发生钝化,具有一定的耐蚀性能。

关键词: 化学镀,    , Ni-Cu-P镀层,    , 氢氟酸,    , 耐蚀性