化学镀Ni-W-P/Pr_2O_3镀层腐蚀电化学行为  

Electrochemical corrosion behaviors of electroless Ni-W-P/Pr_2O_3 coatings

作　　者：黄燕滨[1] 刘菲菲[1] 赵艺伟[1] 

机构地区：[1]装甲兵工程学院装备再制造工程系,北京100072

出　　处：《电镀与涂饰》2007年第2期1-4,共4页Electroplating & Finishing

摘　　要：采用极化曲线法和交流阻抗法研究了化学镀Ni-W-P/Pr2O3镀层在3.5%(质量分数)NaCl水溶液中的电化学腐蚀行为。极化曲线结果表明,化学镀Ni-W-P/Pr2O3镀层的自腐蚀电流(2.977μA/cm2)远远小于Ni-P镀层(10.11μA/cm2),说明Ni-W-P/Pr2O3的耐蚀性能比Ni-P镀层好。交流阻抗试验结果表明,Ni-W-P/Pr2O3镀层在整个浸泡过程中仅出现一个时间常数的单容抗弧,且随着腐蚀时间的增长,镀层电阻也在增大。The electrochemical corrosion behaviors of electroless Ni-W-P/Pr2O3 coating in 3.5% （mass fraction） NaCl solution were studied by means of polarization curves and electrochemical impedance spectroscopy （EIS）. The potentiodynamic polarization test reveals a far lower corrosion current of Ni-W-P/Pr2O3 coating （2.977 μA/cm^2） than that of NioP coating （10.11 μA/cm^2）, indicating a better corrosion resistance of the Ni-W-P/Pr2O3 coating than that of Ni-P coating. In the EIS test of Ni-W-P/Pr2O3 coating, only one capacitance arc appears during the immersion period and the coating resistance increases with increasing corrosion time.

关 键 词：化学镀 Ni-W-P/Pr2O3 极化曲线 交流阻抗 耐蚀性 容抗弧 

分 类 号：TG178[金属学及工艺—金属表面处理] TQ153[金属学及工艺—金属学]