直流、单向脉冲和换向脉冲法制备镍-钴-碳化钨复合镀层的比较

电镀与涂饰 , 2013, 32(3): 9-13.

直流、单向脉冲和换向脉冲法制备镍-钴-碳化钨复合镀层的比较

^1, , ^2, , ^3,

1.R & D Department, Reem Batteries & Power Appliances Co SAOC, Sultanate of Oman

2.Advanced Nano-Composite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University,Karaikudi-630 003, Tamilnadu, India

3.Central Electrochemical Research Institute, Karaikudi-630 006, Tamilnadu, India

关键词：镍-钴合金 , 碳化钨 , 复合镀层 , 显微硬度 , 电化学 , 表面形貌

Comparison of Ni-Co-WC composite coatings prepared by direct, pulse and pulse reverse current methods

BOSE R ^1, , KALAIGNAN G P ^2, , SRINIVASAN K N ^3,

1.R & D Department, Reem Batteries & Power Appliances Co SAOC, Sultanate of Oman

2.Advanced Nano-Composite Coatings Laboratory, Department of Industrial Chemistry, Alagappa University,Karaikudi-630 003, Tamilnadu, India

3.Central Electrochemical Research Institute, Karaikudi-630 006, Tamilnadu, India

Keywords： nickel-cobalt alloy , tungsten carbide , composite coating , microhardness , electrochemistry , surface morphology

在醋酸盐镀液体系中采用直流(DC)、单向脉冲电流(PC)和换向脉冲电流(PRC)3种方法制备了Ni-Co-WC复合镀层.采用扫描电镜及电化学阻抗谱(EIS)表征了镀层的微观组织及耐蚀性.结果表明,镀层的微观结构及性能受镀层中WC含量的影响很大.在最佳WC含量的情况下,镀层的显微硬度及耐蚀性都明显提高.与PC和DC法制备的复合镀层相比,PRC法制备的复合镀层具有更致密的表面,更高的显微硬度以及更好的耐蚀性.

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