锌对镍基690合金均匀腐蚀影响的XPS分析

XPS Analysis of Zinc Injection Effects on General Corrosion of Nickel-Base Alloy 690

摘要: 在不加锌和加锌浓度为50 ppb的两种模拟压水堆一回路水质环境下，对镍基690合金的腐蚀行为进行了研究。经过腐蚀浸泡1 500 h后，用X射线光电子能谱(XPS)对其表面氧化膜结构进行深度分析。结果表明，Zn对内层氧化膜内的NiCr₂O₄和FeCr₂O₄中的Ni和Fe起到了置换作用，形成了ZnCr₂O₄。

Abstract: The effects of zinc addition on behaviors of general corrosion behaviors of nickel-base alloy 690 were investigated in simulated PWR primary water. After exposed in solutions with zinc concentration of 0 and 50 ppb for 1 500 h, oxide films developed on surface of specimens were analyzed by using XPS. The result shows that Zn partly replaces Ni and Fe in NiCr₂O₄ and FeCr₂O₄ in the inner oxide layer and forms ZnCr₂O₄.