Electrochemical Evaluation on the Porosity of Electroless Ni-P Alloy Coatings

Authors

Hong-ying Yu, State Key Lab. for Phys. Chem. of Solid Surface, Dept. Chem. Xiamen Univ., X;
Dong-bai Sun, Dept. of Surface Science and Corrosion Engi. Coll. of Materials Science and Engi. Beijing Univ. of Science and Tech.,Bejing 100083,China;
Jing-bing Huang, Dept. of Surface Science and Corrosion Engi. Coll. of Materials Science and Engi. Beijing Univ. of Science and Tech.,Bejing 100083,China;
De-jun Yang, Dept. of Surface Science and Corrosion Engi. Coll. of Materials Science and Engi. Beijing Univ. of Science and Tech.,Bejing 100083,China;

Corresponding Author

Hong_ying Yu

Abstract

By investigating the polarization curves of pure Ni P alloy,Ni P alloy coation and carbon steel in nitric acids with different concentrations,the sutable concentration of nitric acid for the evaluation of the porosity of Ni P alloy coatings has been determined and the coatings with different thickness have been evaluated.The results indicated that the nitric acid with 10 wt% concentration is the most suitable solution for the porosity of the coating by using electrochemical method.The polarization curve of Ni P alloy coating in 10% nitric acid can accurately reveal the porosity.With the decrease of the porosity of the coating,the corrosion potential of the coating shifted towards positive direction.Then the ordinary detecion method can only be used in detecting the coating with bigger pores.

Keywords

Electrochemistry, Porosity, Ni P Alloy, Coating

DOI Link

https://doi.org/10.61558/2993-074X.1395

Publication Date

2000-08-28

Online Available Date

2000-08-28

Revised Date

2000-08-28

Received Date

2000-08-28

Recommended Citation

Hong-ying Yu, Dong-bai Sun, Jing-bing Huang, De-jun Yang. Electrochemical Evaluation on the Porosity of Electroless Ni-P Alloy Coatings[J]. Journal of Electrochemistry, 2000 , 6(3): 335-340.
DOI: 10.61558/2993-074X.1395
Available at: https://jelectrochem.xmu.edu.cn/journal/vol6/iss3/10

References

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[2 ]　ZhangYandong ,SunDongbai,YuHongying .TheElectrolessPlatingTechniqueofAEN5 40HighPerformanceNi PAlloy[J].Theproceedingof 2 thNationalElectrolessPlatingConference ,1 994.95 1～ 6 2 .