脉冲参数对镍镀层在H_2SO_4溶液中腐蚀性的影响  

Influence of Pulse Plating Parameters on Corrosion Behavior of Ni Deposits in H_2SO_4 Solution

作　　者：赵宇[1] 杨玉国[1] 许韵华[1] 宫晓静[1] 曹克宁[1] 

机构地区：[1]北京交通大学理学院化学所,北京100044

出　　处：《腐蚀与防护》2008年第7期372-374,377,共4页Corrosion & Protection

摘　　要：采用正交试验法,研究了脉冲电镀参数对镍镀层在硫酸溶液中的耐腐蚀性能的影响;采用扫描电镜(SEM)观察镀层腐蚀前后的表面形貌;利用浸泡腐蚀试验,及阳极极化曲线测试检测镀层的耐腐蚀能力。利用阳极极化曲线测试结果作为正交试验指标,分析了脉冲参数及pH值对镀层耐腐蚀性能的影响,表明脉冲频率越大,占空比越小,脉冲平均电流密度在3.5 A/cm2左右,pH值为3.3时,镀层耐腐蚀性能达到最好。The corrosion behavior of pulse plated nickel coatings in H2 SO4 solution were investigated by weight loss tests and anodic polarization curve tests. The morphological information was acquired by SEM. Based on the orthogonal tests, the effects of Jm,f,R and pH value on the corrosion behavior of the Ni deposits were studied. Using anodic polarization curve test results as the index to make the fator-level trend charts, the influence of the factors on the corrosion of Ni was determined. The results show that the best corrosion behavior would be obtained, when the pulse frequency f got higher, duty ratio R got lower, mean pulse current density Jm was about 3. 5 A/ cm^-2 , pH was 3. 3.

关 键 词：脉冲参数 耐腐蚀性 高频 Ni镀层 

分 类 号：TQ153.1[化学工程—电化学工业] TG113.23[金属学及工艺—物理冶金]