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Citation: Fang Jingli, Liu Qin, Han Keping, Chen Yaohui. Studies of the Purple-red Molybdate Conversion Flim on Stainless Steel[J]. Chinese Journal of Applied Chemistry, ;1995, 12(3): 1-4. shu

Studies of the Purple-red Molybdate Conversion Flim on Stainless Steel

Applied Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093

Received Date: 21 September 1994
Revised Date: 30 December 1994

A ptirple-red conversion film on stainless steel was formed by cathodic electrode-position from molybdate-phosphate solution. This film displayed good thermostability. The results of XPS and AES analysis showed that the thickness of the film was 94.4nm and Mo existed as Mo (Ⅵ) in the surface of the film, but as Mo(Ⅵ) and Mo(Ⅳ) in the internal layer of the film. The relative atomic percent content of the film obtained from the elemental com-position constant region of the depth profile curves by AES was O 54.8%, Mo 30.5%,P 11.2% and Fe 3.5% respectively. The cyclevoltammetric oxidation peak also revealed the M0(Ⅳ) in the internal layer of the film.
- stainless steel,
- molybdate,
- conversion film,
- composition,
- thermostability
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