工艺参数对高频脉冲电镀镍钴合金在NaOH溶液中耐蚀性的影响  

Influence of Parameters on Corrosion Resistance of Ni-Co Alloy in NaOH Solution

作　　者：梁燕[1] 许韵华[1] 李霞[1] 郑福才[1] 郑惠钦[1] 

机构地区：[1]北京交通大学理学院,北京100044

出　　处：《腐蚀与防护》2010年第5期338-341,共4页Corrosion & Protection

基　　金：国家重点基础研究发展规划项目(编号:2007CB714705)资助

摘　　要：采用高频脉冲电流制备镍钴合金。通过正交试验,重点考察了脉冲频率、占空比、平均电流密度、镀液pH值、温度及CoSO4.7 H2O的浓度对镀层在NaOH溶液中的极化行为及腐蚀速率的影响,选出最佳电镀工艺为:脉冲频率140 kHz,占空比0.25,平均电流密度3 A/dm2,镀液pH值3,温度45℃,硫酸钴浓度10 g/L。高频脉冲镀层中Co含量增加,晶粒的细化强度增强。Through high frequency pulse electroplating,Ni-Co alloy was prepared.The effects of process conditions such as pulse frequency,duty cycle,current density,pH value,temperature and concentration of CoSO4·7H2O on polarization behavior and corrosion rate of the alloy were studied by orthogonal experiments.The optimal process parameters were pulse frequency of 140kHz,duty cycle of 0.25,current density of 3 A/dm^2,pH of 3,temperature of 55 ℃,CoSO4 of 10 g/L.The Co content increased and the grain refinement strength was enhanced in the high-frequency pulse plating.

关 键 词：脉冲参数 高频 镍钴合金 耐腐蚀性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]