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Research Progress on Sulfur-Induced Corrosion of Alloys 690 and 800 in High Temperature and High Pressure Water
Xia Dahai1,2; Song Shizhe1,2; Wang Jianqiu2; Luo Jingli3
Corresponding AuthorXia Dahai(dahaixia@tju.edu.cn) ; Wang Jianqiu(wangjianqiu@imr.ac.cn)
2017-12-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume53Issue:12Pages:1541-1554
AbstractAs nuclear power operates at high temperature and high pressure, corrosion is considered as one of the issues that threaten the safe operation, though corrosion rarely occurs. To fully understand the electrochemical behavior of nuclear key materials and manage the corrosion degradation of these materials in a proactive manner, a great deal of work have been undertaken in lab. Some sulfurrelated specie can cause corrosion degradation of metal materials. Steam generator (SG) is one of the most important components in nuclear power plant, and alloys 800 and 690 are the most frequently used as SG tubing alloys. Sulfur-induced corrosion of SG alloys in high temperature and high pressure water is one of the most complicated processes. In this paper, the research progress regarding to sulfur-induced corrosion of alloys 690 and 800 was reviewed from the aspects of thermodynamic calculations and experimental. Thermodynamic calculations are mainly presented by E-pH diagrams, volt equivalent diagrams and species distribution curves. It is concluded that the valences of sulfur and their interactions with metal is mainly affected by temperature, solution pH and electrode potential. Experimental data indicate that sulfur induced corrosion is determined by temperature, solution pH, sulfur species, and other impurities like chloride ions, grain orientation, alloy compositions and stress etc. These factors can interact in a very complicated way. Generally, increasing temperature and decreasing solution pH would increase the corrosion degree of SG tubing alloys. Sulfur at the reduced or intermediate oxidation level are more detrimental than complete oxidation level, to the passivity of SG tubing alloys. Chloride ions have a combined effect with thiosulfate on passive film degradation in the case that chloride's adsorption is dominant; this combined effect is not remarkable if the chloride's adsorption is not dominant. Elements like Cr, Mo and Cu in alloys would weaken sulfur adsorption to some extent and therefore inhibit sulfur-induced corrosion, but increasing Ni content would enhance sulfur-induced corrosion. Both compressive and tensile stress would increase the reactivity of a passive surface of SG tubing. Sulfur would more easily adsorb on the metal surface where it has more defects, resulting in an increased dissolution rate. The crystal orientation can enhance the corrosion rate in the order of ( 111)<( 100)<( 110).
Keywordsteam generator alloy 690 alloy 800 thiosulfate reduced sulfur passive film
Funding OrganizationNational Natural Science Foundation of China ; Open-Ended Fund of Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences
DOI10.11900/0412.1961.2017.00198
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51701140] ; Open-Ended Fund of Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences[2016NMSAKF02]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000416301600001
PublisherSCIENCE PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/125509
Collection中国科学院金属研究所
Corresponding AuthorXia Dahai; Wang Jianqiu
Affiliation1.Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Tianjin 300354, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China
3.Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
Recommended Citation
GB/T 7714
Xia Dahai,Song Shizhe,Wang Jianqiu,et al. Research Progress on Sulfur-Induced Corrosion of Alloys 690 and 800 in High Temperature and High Pressure Water[J]. ACTA METALLURGICA SINICA,2017,53(12):1541-1554.
APA Xia Dahai,Song Shizhe,Wang Jianqiu,&Luo Jingli.(2017).Research Progress on Sulfur-Induced Corrosion of Alloys 690 and 800 in High Temperature and High Pressure Water.ACTA METALLURGICA SINICA,53(12),1541-1554.
MLA Xia Dahai,et al."Research Progress on Sulfur-Induced Corrosion of Alloys 690 and 800 in High Temperature and High Pressure Water".ACTA METALLURGICA SINICA 53.12(2017):1541-1554.
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