Study on Corrosion Resistance of Electroless Nickel Composite Coatings

Authors

Tsong-jen YANG, Dept. of Materials Science, Feng Chia Univ, Taichung) Hsieh Sue_hwei ( Dept.of Materials Sci.and Engin,Hu Wei Inst.of Tech,Yuenlin ;
Meng-feng JOU, Dept. of Materials Science, Feng Chia Univ, Taichung) Hsieh Sue_hwei ( Dept.of Materials Sci.and Engin,Hu Wei Inst.of Tech,Yuenlin ;

Corresponding Author

Tsong_jen YANG

Abstract

The eletroless nickel composite coating was prepared by uniform dispersion of diamond (or PTFE) particles throughout electroless nickel deposition. Corrosion resistance of composite coating in 3.5% NaCl aqueous solution was investigated by electrochemical analysis, dipping test and salt spray test. The results showed that the corrosion resistance of composite coating was inferior to that of electroless nickel coating if small amount of particles was added to the composite coating. Microsturctural analysis by SEM,AES,XRD,and EPMA indicated that the distribution of phosphorus is not homogeneous in the composite coating. The phosphorus_rich region acts as microcathode, however, the phosphorus_lean region acts as microanode.The decrease in corrosion resisthnce may result from the presence of numerous microcells presented in the composite coating.Only when enough amount of particles is included in the composite coating,the protective effect due to inertness of particl is observed.

Keywords

Electroless composite coating, Diamond, PTFE, Corrosion resistance

DOI Link

https://doi.org/10.61558/2993-074X.1422

Publication Date

2001-05-28

Online Available Date

2001-05-28

Revised Date

2001-05-28

Received Date

2001-05-28

Recommended Citation

Tsong-jen YANG, Meng-feng JOU. Study on Corrosion Resistance of Electroless Nickel Composite Coatings[J]. Journal of Electrochemistry, 2001 , 7(2): 203-209.
DOI: 10.61558/2993-074X.1422
Available at: https://jelectrochem.xmu.edu.cn/journal/vol7/iss2/3

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