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
收藏
页码：224 / 229
页数：6
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