利用高温高压反应釜模拟空气压缩机叶片腐蚀环境条件,在FV(520)B不锈钢表面制备H2S腐蚀产物膜,利用XPS、SEM、XRD等分析技术分析硫化膜成分、结构,以研究硫化膜形成和生长机理。结果表明,初始阶段,硫化膜主要为Fe7S8、Fe(1-x)S,其中有较多的二价阳离子空位,硫化膜的不断生长是依靠金属阳离子通过晶格中大量空位向外迁移至气固界面并与离解的S离子反应;随硫化时间的延长膜厚不断增加,最终出现分层:外层成分为Fe7S8、Fe(1-x)S、Ni(1-x)S等,内层成分为少量Fe7S8、Fe(1-x)S、Ni(1-x)S和Cr2S3;内层中Cr2S3抑制Fe、Ni离子向外迁移,但硫化初期阶段Cr2S3的含量很少,这种抑制作用不明显,随着Cr硫化膜层的不断生长,整体硫化膜的生长速度被强烈抑制。 The H2S corrosion product film was prepared on the surface of FV (520) B stainless steel by simulating the environmental conditions of the air compressor blades in a high temperature and high pressure reactor. The composition and structure of the sulfide film were analyzed by XPS, SEM and XRD to study the formation and Growth mechanism. The results show that in the initial stage, the cured films mainly consist of Fe7S8 and Fe (1-x) S with many vacancies of divalent cations. The continuous growth of the cured films relies on the metal cations migrating outward through a large number of vacancies in the lattice Solid interface with the dissociated S ions; with the extension of the vulcanization time increasing film thickness, the final stratification: the outer composition of Fe7S8, Fe (1-x) S, Ni (1-x) S, etc., the inner Fe (1-x) S, Ni (1-x) S and Cr2S3 in the inner layer. Cr2S3 inhibits the migration of Fe and Ni ions in the inner layer, but the content of Cr2S3 in the initial stage of vulcanization is very little. Obviously, with the continuous growth of Cr film layer, the overall growth rate of the sulfide film is strongly inhibited.