Ni-P/纳米SiC复合镀层的电化学行为及耐蚀性能  

Electrochemical Behavior and Corrosion Resistance of Electroplated Nickel-Phosphorus/Nanometer Silicon Carbide Composite Coating

作　　者：王玉 袁学韬[2] 孙冬柏[3] 俞宏英[3] 

机构地区：[1]中国文化遗产研究院,北京100029 [2]北京有色金属研究总院,北京100088 [3]北京科技大学腐蚀与防护中心,北京100083

出　　处：《材料保护》2012年第5期1-4,85,共4页Materials Protection

基　　金：北京市教委科技发展计划重点项目(KZ200410028012)

摘　　要：为了深入研究纳米SiC对Ni-P电镀层在NaCl溶液中的电化学行为的影响,电沉积制备了Ni-P/纳米SiC复合镀层。采用扫描电子显微镜(SEM)观察了镀层的微观形貌,利用动电位极化曲线和交流阻抗技术研究了Ni-P/纳米SiC复合镀层在3.5%NaCl溶液中的电化学行为。结果表明:经过24 h浸泡,非晶Ni-P镀层和Ni-P/SiC2复合镀层在3.5%NaCl溶液中具有较高的电荷转移电阻,表现较好的耐蚀性;Ni-P/SiC20复合镀层在NaCl溶液中随着浸泡时间的延长,Nyquist谱半圆弧减小,因而镀层耐蚀性较差。Electroplated Ni-P/nano-SiC composite coating was prepared.The morphology of as-obtained composite coating was observed using a scanning electron microscope.The electrochemical behavior of the coating in 3.5% NaCl solution was investigated by measuring potentiodynamic polarization curves and electrochemical impedance spectra.It was found that both electroplated Ni-P coating and Ni-P/nano-SiC composite coating containing 2% nano-SiC(mass fraction) had high charge transfer reaction resistance when they were immersed in the saline solution for 24 h,showing good corrosion resistance.However,Ni-P/nano-SiC composite coating containing 20% nano-SiC showed poor corrosion resistance in the saline solution.

关 键 词：复合镀层 NI-P镀层 纳米SIC 交流阻抗 

分 类 号：TQ153.2[化学工程—电化学工业]