Corrosion and electrochemical investigations for stainless steels in molten Solar Salt: The influence of chloride impurity

被引：18

作者：

Li, Heng ^{[1
,2
]}

Wang, Xiaowei ^{[1
,2
]}

Yin, Xuzhong ^{[1
,2
]}

Yang, Xinyu ^{[3
,4
]}

Tang, Jianqun ^{[1
,2
]}

Gong, Jianming ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ, Sch Mech & Power Engn, Nanjing 211816, Peoples R China

[2] Jiangsu Key Lab Design & Manufacture Extreme Pres, Nanjing 211816, Peoples R China

[3] I Form Adv Mfg Res Ctr, Dublin, Ireland

[4] NUI Galway, Sch Engn, Coll Sci & Engn, Mech Engn, Galway, Ireland

来源：

JOURNAL OF ENERGY STORAGE | 2021年 / 39卷

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Corrosion behavior; Molten solar salt; Chloride impurity; Static immersion; EP test; Stainless steel; THERMAL-ENERGY STORAGE; HIGH-TEMPERATURE CORROSION; HEAT-TRANSFER FLUID; ALLOYS; OXIDATION; BEHAVIOR; SYSTEMS; MIXTURES; IRON;

D O I：

10.1016/j.est.2021.102675

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The influence of chloride impurity on corrosion behavior of stainless steels (304, 316 L and 347 SS) was carried out in molten Solar Salt at 565 degrees C. Static immersion and electrochemical polarization tests were carried out at 565 degrees C. It was found that the corrosion rates of the studied steels obtained from both static immersion and EP tests significantly increase in Solar Salt with the presence of chloride impurity. The chloride enhances the aggressiveness of the molten Solar Salt at 565 degrees C by producing oxidants, which aggravates the corrosion extent of the investigated steels. Moreover, the oxide scale formed in molten Solar Salt containing chloride impurity is prone to spall. The synergy effect of active oxidation and the spallation of the oxide scale dominates the accelerating corrosion process.

引用

页数：12

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