With the rapid development of molten salt reactor, the problem of post-treatment of spent fuel salt discharged from the core becomes increasingly prominent. Like molten fluoride salts, solid fluoride salts are also highly corrosive, which poses a serious challenge to container materials. This paper describes the corrosion behavior of 316 stainless steel (316SS) with and without Ni coating in low temperature solid fluoride salt. Results show that 316SS without Ni coating appears pitting corrosion with the prolongation of corrosion time. 316SS with Ni coating experiences intergranular corrosion. And a loose hollow interlayer is formed between Ni coating and matrix. Corrosion of both samples increases with the extension of exposure time with solid fluoride salts.

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