镀镍冲孔钢带的耐蚀性能和电化学机理研究  

A study on corrosion behavior and electrochemical mechanism of nickel plated punched steel strip

作　　者：李超群[1] 李新海[1] 王志兴[1] 郭华军[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《功能材料》2014年第3期42-46,共5页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB613607)

摘　　要：通过浸泡法测量了镀镍冲孔钢带在Ni(NO3)2溶液中的腐蚀速率,采用动电位极化曲线、电化学阻抗谱(EIS)和XPS分析进行了镍沉积层在5%NaCl溶液中的电化学腐蚀行为和机理研究,结果表明,冲孔钢带基体沉积镍层显著改善了抗腐蚀性能,镍沉积层的固有性质和钝化膜的形成是提高镀镍冲孔钢带防腐性能的主要因素,相比于Watts镀液,从柠檬酸钠溶液中制备的镀镍冲孔钢带极化电阻高、腐蚀电流小、电极转移电阻大和腐蚀速率小。The corrosion rate of nickel plated punched steel strip was measured by immersion corrosion test.The electrochemical corrosion behavior and mechanism of these Ni deposits in 5% NaCl media were investigated by using potentiodynamic polarization test,electrochemical impedance spectroscopy （EIS）,and X-ray photoelec-tron spectroscopy （XPS）.The results showed that the Ni deposit exhibits remarkably improved corrosion resist-ance.The higher corrosion resistance of nickel plated punched steel strip may be ascribed to the inherent nature of Ni and the more rapid formation of stable and continuous protective passive film.The results also revealed that the Ni deposited from citrate bath has higher polarization resistance,smaller corrosion current,higher charge transfer resistance and smaller corrosion rate,compared with that from Watts bath.

关 键 词：镀镍冲孔钢带 抗腐蚀性 柠檬酸盐镀镍溶液 电化学机理 

分 类 号：TM911.14[电气工程—电力电子与电力传动] TQ153.12[化学工程—电化学工业]