Electrochemical corrosion behavior of electroless Ni-P coating in NaCl and H2SO4 solutions

被引：28
|
作者：
Wang, L. L. [2 ]
Chen, H. J. [2 ]
Hao, L. [1 ]
Lin, A. [1 ]
Gan, F. X. [1 ,3 ]
机构：
[1] Wuhan Univ, Dept Environm Engn, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China
[2] Xinyang Normal Univ, Coll Chem & Chem Engn, Xinyang 464000, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2011年 / 62卷 / 11期
关键词：
corrosion behavior; EIS; electrochemical test; electroless Ni-P coating; H [!sub]2[!/sub]SO[!sub]4[!/sub; NaCl;
D O I：
10.1002/maco.200905575
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Electrochemical corrosion behavior of electroless Ni-P coating in NaCl and H2SO4 solutions were studied by potentiodynamic polarization curves and electrochemical impedance spectra techniques, as well as the corrosion morphology was characterized. The results indicate that electroless Ni-P coating with about 25 mu m is stable in 30 days immersion in NaCl solution. Although it was corroded with prolonged immersion days, the corrosive medium has not penetrated through the coating. During the H2SO4 concentration ranging from 5 to 10%, the corrosion current density of electroless Ni-P coating increased due to the intensified anodic dissolution process; in 15% H2SO4 solution, electroless Ni-P coating shows obvious anodic passivation effect.
引用
收藏
页码：1003 / 1007
页数：5
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