Effects of thiosulfate and dissolved oxygen on crevice corrosion of Alloy 690 in high-temperature chloride solution

被引：20

作者：

Ning, Fangqiang ^{[1
,2
]}

Tan, Jibo ^{[1
]}

Zhang, Ziyu ^{[1
]}

Wu, Xinqiang ^{[1
]}

Wang, Xiang ^{[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 Ma, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 66卷

基金：

中国国家自然科学基金;

关键词：

Alloy; Crevice corrosion; Pitting corrosion; High-temperature corrosion; Thiosulfate; Oxidation; PRESSURIZED-WATER REACTORS; REVISED POURBAIX DIAGRAMS; STEAM-GENERATOR CREVICES; SULFUR INDUCED CORROSION; NICKEL-BASE ALLOYS; SECONDARY-SIDE; QUANTITATIVE ASSESSMENT; PASSIVITY DEGRADATION; TRANSPORT PROCESSES; PITTING CORROSION;

D O I：

10.1016/j.jmst.2020.05.074

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crevice corrosion behavior of Alloy 690 was investigated in high-temperature chloride solution containing different concentrations of thiosulfate (S2O32-) and dissolved oxygen (DO). The S2O32- inhibited corrosion of Alloy 690 through consuming oxygen in aerated chloride solution. In deaerated chloride solution, the S2O32- was reduced to S degrees and S-2 and subsequently incorporated into the oxide films, which promoted the pitting corrosion at locations of both TiN inclusions and matrix inside the crevice during the crevice corrosion as well as influenced the composition and thickness of the oxide films. The effect mechanisms of S2O32- and DO on crevice corrosion in high-temperature chloride solution are discussed. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：163 / 176

页数：14

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