不锈钢上黑色钼盐转化膜的研究

用阴极电沉积法从钼酸盐和磷酸盐温和溶液中获得了黑色的不锈钢转化膜，该膜具有良好的热稳定性。电子能谱（ＸＰＳ和ＡＥＳ）分析表明，膜厚约为８２０ｎｍ，膜的表面铝以Ｍｏ（Ⅵ）存在，而在膜内则以Ｍｏ（Ⅵ）与Ｍｏ（Ⅳ）共存。从ＡＥＳ深度剥蚀曲线的组成恒定区求得膜的组成为：Ｏ５０．９％，Ｍｏ２９．４％，Ｐ１２．６％和Ｆｅ７．１％。循环伏安的氧化峰也证明膜内存在Ｍｏ（Ⅳ）。

Studies of the Black Molybdate Conversion Film on Stainless Steel

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.