Effect of Temperature and Impurity Content to Control Corrosion of 316 Stainless Steel in Molten KCl-MgCl2 Salt

被引：10
|
作者：
Li, Na [1 ,2 ]
Wang, Huaiyou [3 ]
Yin, Huiqin [1 ]
Liu, Qi [1 ]
Tang, Zhongfeng [1 ,2 ,4 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
[4] Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
来源：
MATERIALS | 2023年 / 16卷 / 05期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
corrosion; high temperature; KCl-MgCl2; molten salt; alloy; THERMAL-ENERGY STORAGE; BEHAVIOR;
D O I：
10.3390/ma16052025
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The corrosion resistance of 316 stainless steel (316SS) in molten KCl-MgCl2 salts was studied through static immersion corrosion at high temperatures. Below 600 degrees C, the corrosion rate of 316SS increased slowly with increasing temperature. When the salt temperature rises to 700 degrees C, the corrosion rate of 316SS increases dramatically. The corrosion of 316SS is mainly due to the selective dissolution of Cr and Fe at high temperatures. The impurities in molten KCl-MgCl2 salts could accelerate the dissolution of Cr and Fe atoms in the grain boundary of 316SS, and purification treatment can reduce the corrosivity of KCl-MgCl2 salts. Under the experimental conditions, the diffusion rate of Cr/Fe in 316SS changed more with temperature than the reaction rate of salt impurities with Cr/Fe.
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收藏
页数：12
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