Crevice corrosion behaviors of Alloy 690 and 405 stainless steel in chloride solutions with different concentrations of thiosulfate

被引：7

作者：

Ning, Fangqiang ^{[1
,2
]}

Tan, Jibo ^{[1
]}

Zhang, Ziyu ^{[1
]}

Wang, Xiang ^{[1
]}

Wu, Xinqiang ^{[1
]}

Han, En-Hou ^{[1
]}

Ke, Wei ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Liaoning Key Lab Safety & Assessment Tech Nucl Mat, Shenyang 110016, Peoples R China

[2] Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2023年 / 575卷

基金：

中国国家自然科学基金;

关键词：

Alloy; 690; 405 stainless steel; Crevice corrosion; Pitting corrosion; Electrochemical engineering; N80; CARBON-STEEL; PITTING CORROSION; NEUTRAL CHLORIDE; PASSIVITY DEGRADATION; SECONDARY-SIDE; SULFUR; INITIATION; WATER; ENVIRONMENT; CHEMISTRY;

D O I：

10.1016/j.jnucmat.2022.154226

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crevice corrosion behaviors of Alloy 690 and 405 stainless steel (SS) in chloride (Cl -) solutions with different concentrations of thiosulfate (S2O3 2 -) were investigated using a self-designed electrochemical testing device for crevice corrosion. The increase of concentration ratio of Cl-/S2O3 2 - promotes crevice corrosion of Alloy 690. When crevice corrosion occurs between Alloy 690 and 405 SS, Alloy 690 outside the crevice is used as the cathode for reduction reaction of O 2 , and Alloy 690 inside the crevice is also used as the cathode for hydrogen evolution reaction, both of which jointly promote the anodic dissolu-tion of 405 SS inside the crevice. The crevice corrosion mechanisms of Alloy 690 and 405 SS are also discussed.(c) 2022 Elsevier B.V. All rights reserved.

引用

页数：13

共 46 条

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