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

Chinese Journal of Applied Chemistry ›› 1995, Vol. 0 ›› Issue (3): 1-4.

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

Fang Jingli, Liu Qin, Han Keping, Chen Yaohui

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

Received:1994-09-21 Revised:1994-12-30 Published:1995-06-10 Online:1995-06-10

Abstract

Abstract: A ptirple-red conversion film on stainless steel was formed by cathodic electrode-position from molybdate-phosphate solution,This film displayed good thermostability,Theresults of XPS and AES analysis showed that the thickness of the film was 94.4nm and Moexisted as Mo(Ⅵ)in the surface of the film, but as Mo(Ⅵ) and Mo(Ⅳ)in the internal layerof 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%,P11.2%and Fe 3.5%respectively.The cyclevoltamrnetric oxidation peak also revealed the M0(Ⅳ)in the internal layer of the film.

Key words: stainiess steel, molybdatc, Conversion film, composition, thermostability

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, 0(3): 1-4.

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

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