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本文研究了奥氏体不锈钢阳极氧化膜的形成、耐蚀性能和耐蚀机理。用恒电位方法研究膜的形成条件时指出,不锈钢阳极氧化膜是在硫酸溶液中和在过钝化电位区的特定电位下形成的。这种阳极氧化膜具有良好的耐蚀性能,能显著提高不锈钢的抗均匀腐蚀性能,对抗点蚀和缝隙腐蚀更为有效。用X-射线光电子能谱(XPS)对不锈钢阳极氧化膜的性能进行了研究,探讨了不锈钢阳极氧化膜与自然钝化膜、硝酸钝化膜性能的差异。经过特殊处理的阳极氧化膜中有钼存在。研究表明,不锈钢阳极氧化膜是高铬高钼的氧化膜,具有三层结构的特征,每层都具有独特的性能,并据此探讨了不锈钢阳极氧化膜的耐蚀机理。
This paper studies the formation of austenitic stainless steel anodic oxide film, corrosion resistance and corrosion resistance mechanism. When the film formation conditions were investigated by the potentiostatic method, it was pointed out that the stainless steel anodic oxide film was formed in a sulfuric acid solution and at a specific potential in the passivation potential region. This anodized film has good corrosion resistance, can significantly improve the anti-uniform corrosion resistance of stainless steel, pitting and crevice corrosion more effective. The properties of stainless steel anodic oxide coatings were investigated by X-ray photoelectron spectroscopy (XPS), and the differences between stainless steel anodic oxide coatings and natural passivation films and nitric acid passivation films were discussed. A specially treated anodized film contains molybdenum. The results show that the stainless steel anodic oxide film is a high chromium, high molybdenum oxide film with three-layer structure and unique properties of each layer. The corrosion resistance of the stainless steel anodic oxide film is discussed.