Effect of polyacrylic acid on the corrosion behavior of Alloy 690 in pressurized water reactor secondary water

被引：0

作者：

Zhang, Zhiyuan ^{[1
,2
,3
]}

Zhang, Zhiming ^{[3
]}

Wang, Jianqiu ^{[1
,2
,3
]}

Ming, Hongliang ^{[1
,2
]}

Zhu, Haipeng ^{[1
,2
,3
]}

Dan, Tichun ^{[4
]}

Wang, Ruoyu ^{[3
]}

Gao, Beibei ^{[3
]}

Han, En-Hou ^{[1
,3
,5
]}

机构：

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

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

[3] Inst Corros Sci & Technol, Guangzhou 510530, Peoples R China

[4] China Nucl Power Operat Technol Corp Co Ltd, China Natl Nucl Corp, Wuhan 430223, Peoples R China

[5] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2025年 / 220卷

关键词：

Polyacrylic acid; Alloy; 690; Pressurized water reactor; Secondary water; Oxide film; FERRITIC-MARTENSITIC STEEL; HIGH-TEMPERATURE WATER; OXIDE-FILMS; DISPERSION-STABILITY; DISSOLVED-OXYGEN; STAINLESS-STEELS; CARBON-STEEL; STEAM; PH; DEGRADATION;

D O I：

10.1016/j.jmst.2024.09.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of polyacrylic acid (PAA) on the corrosion behavior of Alloy 690 in simulated pressurized water reactor secondary water was investigated. The duplex oxide film structure, consisting of a Ni-rich outer layer and a Cr-rich inner layer, was maintained regardless of PAA presence. PAA inhibited the growth of outer Ni-rich particles while promoting Cr enrichment in the inner layer and inducing its amorphization, both enhancing oxidation resistance. However, excess PAA (>= 500 ppb) suppressed protective oxide formation during initial oxidation, leading to oxygen penetration into the matrix. A PAA concentration of around 250 ppb is considered optimal for steam generators, as it provides the benefits of PAA without adverse effects on the alloy. (c) 2025 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：1 / 13

页数：13

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