Effect of SO42- on the corrosion of 316L stainless steel in molten FLiNaK salt

被引：43

作者：

Qiu, Jie ^{[1
,2
]}

Leng, Bin ^{[1
]}

Liu, Huajian ^{[1
]}

Macdonald, Digby D. ^{[2
]}

Wu, Angjian ^{[2
]}

Jia, Yanyan ^{[1
]}

Xue, Wandong ^{[1
]}

Yu, Guojun ^{[1
]}

Zhou, Xingtai ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[2] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA

来源：

CORROSION SCIENCE | 2018年 / 144卷

关键词：

Molten salt; FLiNaK; Corrosion; Sulphate; 316L stainless steel; MnS; MNS INCLUSIONS; HOT CORROSION; HASTELLOY-N; INITIATION; BEHAVIOR; ALLOYS;

D O I：

10.1016/j.corsci.2018.08.057

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of SO42- on the corrosion behavior of 316 L stainless steel (SS) in molten FLiNaK (LiF-NaF-KF: 46.5-11.5-42 mol.%) salt was studied. Results reveal that the SO42- in the salt remarkably accelerates the corrosion of 316 L SS by promoting the dissolution of Cr, leading to increasing intergranular corrosion of the alloy. On the other hand, the results of structural characterization indicate that the SO42- can react with Mn to form MnS at the grain boundaries of the alloy. The galvanic couple between MnS and steel matrix could further accelerate the intergranular corrosion of 316 L SS in molten fluoride salt environments.

引用

页码：224 / 229

页数：6

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