Abstract A native passive film on 25Cr-7Ni super duplex stainless steel was analyzed using synchrotron hard X-ray photoemission electron microscopy, focusing on variations between individual grains of ferrite and austenite phases. The film consists of an oxide inner layer and an oxyhydroxide outer layer, in total 2.3 nm thick. The Cr content is higher in the outer than the inner layer, ca. 80 % on average. The Cr content is higher on ferrite than austenite, whereas the thickness is rather uniform. The grain orientation has a small but detectable influence, ferrite (111) grains have a lower Cr content than other ferrite grains.

中文翻译：

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同步加速器硬X射线光电子发射显微镜解析超级双相不锈钢上原生钝化膜的横向变化

摘要 使用同步加速器硬 X 射线光电电子显微镜分析了 25Cr-7Ni 超级双相不锈钢上的天然钝化膜，重点关注铁素体和奥氏体相的各个晶粒之间的变化。该薄膜由一个氧化物内层和一个羟基氧化物外层组成，总厚度为 2.3 nm。外层的 Cr 含量高于内层，大约为 平均 80%。铁素体中的 Cr 含量高于奥氏体，但厚度相当均匀。晶粒取向具有很小但可检测的影响，铁素体 (111) 晶粒的 Cr 含量低于其他铁素体晶粒。