脉冲占空比对Ni-W合金镀层耐蚀性的影响  

Effects of Duty Cycle on Corrosion Resistance of Ni-W Alloy Coating

作　　者：韩啸[1] 陈吉[1] 吴新春[1] 颜子云 杨占利 

机构地区：[1]辽宁石油化工大学机械工程学院石油化工过程腐蚀与防护技术中心,辽宁抚顺113001

出　　处：《电镀与环保》2014年第6期6-8,共3页Electroplating & Pollution Control

基　　金：辽宁省自然科学基金(No.201202127);辽宁省高等学校杰出青年学者成长计划项目(No.LJQ2011033)

摘　　要：采用脉冲电沉积方法在纯铜基体上制备出Ni-W合金镀层.研究了脉冲占空比（30％～60％）对镀层表面形貌、结构、成分和耐蚀性的影响.结果表明：制得的Ni-W合金镀层表面致密、平整,W的质量分数在46.84 ％～49.24％范围内窄幅波动,具有非晶态结构.脉冲占空比为50％时制得的镀层的耐蚀性最好.在3.5％的NaCl溶液中,自腐蚀电位较正,自腐蚀电流密度最小,电荷转移电阻最大.The Ni-W alloy coating was pulse electrodeposited on a pure Cu substrate.The effects of duty cycle （30 ％～60 ％） on the morphology,structure,composition and corrosion resistance of the coating were investigated.The results show that the deposited Ni-W alloy coating is amorphous,with a compact and smooth surface,and its W mass fraction is fluctuated in a narrow range of 46.84 ％ ～49.24 ％.The coating deposited at a duty cycle of 50 ％ exhibits the best corrosion resistance.In 3.5 ％ NaCl solution,its self-corrosion potential is more positive,its self-corrosion current density is the smallest,and its charge transfer resistance is the highest.

关 键 词：NI-W 非晶态合金 脉冲电沉积 耐蚀性 脉冲占空比 

分 类 号：TQ153[化学工程—电化学工业]