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Studies Of The Black Molybdate Conversion Film On Stainless Steel, Jingli Fang, Liuqin Liuqin, Keping Han, Yaohui Chen
Studies Of The Black Molybdate Conversion Film On Stainless Steel, Jingli Fang, Liuqin Liuqin, Keping Han, Yaohui Chen
Journal of Electrochemistry
A black conversion film was formed on stainless steel with cathodicelectrodeposition method from a molybdate-phosphate solution. This film displayed goodthemcotability. The results of XPS and AES analysis showed that the thickness of the film was 820 nmand that Mo existed as Mo(Ⅵ)in the surface of the film,while existed as Mo(Ⅵ)and Mo(Ⅳ)in theinternal layer of the film. The relative atomic percent content(A,C.% of the film obtained from theelemental composition constant region of the depth profile curves by AES was O 50.9%,Mo 29.4%,P12.6%and Fe 7.1%respectively.The cyclevoltammetric oxluation peak also showed that Mo(Ⅳ)existed in the internal layer of the film.