Studies of the Black Molybdate Conversion Film on Stainless Steel

Authors

Jingli Fang, Applied Chem. Inst., State Key Lab. Coordination Chemistry, Nanjing University, Nanjing 210093
LiuQin LiuQin, Applied Chem. Inst., State Key Lab. Coordination Chemistry, Nanjing University, Nanjing 210093
Keping Han, Applied Chem. Inst., State Key Lab. Coordination Chemistry, Nanjing University, Nanjing 210093
Yaohui Chen, Applied Chem. Inst., State Key Lab. Coordination Chemistry, Nanjing University, Nanjing 210093

Corresponding Author

Jingli Fang

Abstract

A black conversion film was formed on stainless steel with cathodic electrode position method from a molybdate-phosphate solution. This film displayed good themcotability. The results of XPS and AES analysis showed that the thickness of the film was 820 nm and that Mo existed as Mo(Ⅵ) in the surface of the film, while existed as Mo(Ⅵ) and Mo(Ⅳ) in the internal layer of the film. The relative atomic percent content (A.C.% of the film obtained from the elemental composition constant region of the depth profile curves by AES was O 50.9%, Mo 29.4%, P 12.6% and Fe 7.1% respectively. The cycle voltammetric oxluation peak also showed that Mo(Ⅳ) existed in the internal layer of the film.

Keywords

colorring film, Molybdate, stainless steel, XPS, AES, Cyclevoltammetry.

DOI Link

https://doi.org/10.61558/2993-074X.1282

Publication Date

1995-05-28

Online Available Date

1995-05-28

Revised Date

1995-01-03

Received Date

1994-09-24

Recommended Citation

Jingli Fang, LiuQin LiuQin, Keping Han, Yaohui Chen. Studies of the Black Molybdate Conversion Film on Stainless Steel[J]. Journal of Electrochemistry, 1995 , 1(2): 193-197.
DOI: 10.61558/2993-074X.1282
Available at: https://jelectrochem.xmu.edu.cn/journal/vol1/iss2/10