高频脉冲复合电镀(Ni-Co)-SiC复合镀层的耐蚀性研究  

Corrosion Resistance of High Frequency Pulse Composite Electroplating Ni-Co-SiC Composite Coating

作　　者：李岑[1] 许韵华[2] 

机构地区：[1]北京交通大学机电学院,北京100044 [2]北京交通大学理学院,北京100044

出　　处：《电镀与精饰》2010年第6期1-5,共5页Plating & Finishing

基　　金：国家重点研究规划项目(2007CB714705)

摘　　要：用高频脉冲复合电镀方法制备了(Ni-Co)-SiC复合镀层。研究了脉冲频率对镀层硬度及耐蚀性的影响。结果表明:随着脉冲频率的增加,复合镀层表面更加致密、均匀,硬度提高。在3.5%NaCl溶液和15%H2SO4溶液中,(Ni-Co)-SiC复合镀层的自腐蚀电位均发生正移,腐蚀质量损失速率变慢。与Ni-Co合金镀层相比,复合镀层具有较高的硬度和耐蚀性。The high frequency pulse composite electroplating was adopted to prepare （Ni-Co）-SiC com- posite coating. The impacts of impulse frequency on hardness and corrosion resistance were studied. The results indicated that the coating surface tended to be more compact and uniform and its corrosion poten- tial shifted to positive direction with the frequency increasing. When the coating was immersed in 3.5% NaCl or 15% H2SO4 solutions, the weight loss decreased obviously. Moreover, the coatings performed higher hardness and better corrosion resistance than Ni-Co coating.

关 键 词：高频脉冲电镀 (Ni—Co)-SiC复合镀层 耐蚀性 硬度 

分 类 号：TQ153.2[化学工程—电化学工业]