Abstract The effect of CrF3 on the corrosion behaviour of Hastelloy-N and 316L austenitic stainless steel alloys in FLiNaK at 700 °C was investigated using synchrotron radiation and other characterisation techniques. The results showed that CrF3 considerably accelerated the corrosion of both tested alloys by promoting the dissolution of Cr, Fe, and Mn from alloy matrices into molten salt. The 316L stainless steel alloys mainly exhibited intergranular corrosion, whereas the Hastelloy-N alloys tended to exhibit intergranular and pitting corrosion. After corrosion, the lattice parameter of both alloys decreased and Cr1.07Fe18.93 was formed on the surface of the 316L stainless steel alloys.

中文翻译：

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CrF 3 对Hastelloy-N和316L不锈钢合金在FLiNaK熔盐中腐蚀行为的影响

摘要 使用同步辐射和其他表征技术研究了 CrF3 对 Hastelloy-N 和 316L 奥氏体不锈钢合金在 700 °C FLiNaK 中的腐蚀行为的影响。结果表明，CrF3 通过促进合金基体中的 Cr、Fe 和 Mn 溶解到熔盐中，显着加速了两种测试合金的腐蚀。316L不锈钢合金主要表现出晶间腐蚀，而Hastelloy-N合金则倾向于表现出晶间腐蚀和点蚀。腐蚀后，两种合金的晶格参数均降低，316L不锈钢合金表面形成Cr1.07Fe18.93。