Characterization of the oxide film formed on alumina-forming austenitic stainless steel in deaerated, DH, DO, and OT supercritical water

doi:10.1016/j.jnucmat.2024.155177

IMR OpenIR

	Characterization of the oxide film formed on alumina-forming austenitic stainless steel in deaerated, DH, DO, and OT supercritical water
	Gao, Yang 1; Qiu, Xi 2; Su, Haozhan 3; Shi, Huigang 1; Zhang, Lefu 1; Sun, Dayun 1; Zhou, Zhangjian 4; Liang, Tian 5; Guo, Xianglong 1
通讯作者	Zhang, Lefu(lfzhang@sjtu.edu.cn)
	2024-09-01
发表期刊	JOURNAL OF NUCLEAR MATERIALS
ISSN	0022-3115
卷号	598 页码:16
摘要	The effects of water chemistry (deaerated (DO < 10 ppb), dissolved hydrogen (DH 1.6 ppm), dissolved oxygen (DO 2 ppm), and oxygen treatment (OT 300 ppb O-2 and 100 ppb NH3) on the corrosion behavior of alumina-forming austenitic stainless steel (AFAs) were systematically investigated. A dual-layer oxide scale composed of an inner Fe/Cr/Al oxide layer and an outer Fe-rich oxide layer was observed on the AFAs. Water chemistry was found to have a negligible effect on the inner Fe/Cr/Al oxide layer; however, the morphology of the outer Fe-rich oxide layer was found to depend significantly on the chemistry. No facetted and dense hematite, which effectively protected the alloy and led to lower weight gain (less oxidation) over prolonged exposure, was formed in the outer oxide layer in oxidizing environments (DO and OT). Conversely, columnar magnetite with a porous structure was formed in outer oxide layer in reducing environments (deaerated and DH) in the absence of oxygen, with a higher weight gain observed. The addition of NH3 increased the pH of the supercritical water (SCW), thereby promoting alumina dissolution and rendering the OT conditions undesirable for use in a supercritical water-cooled reactor (SCWR). This study provides valuable insight into the behavior of AFAs in SCW and highlights the importance of carefully controlling SCW chemistry to optimize material performance.
关键词	Supercritical water Water chemistry regime Alumina -forming austenitic alloy Corrosion Oxide film
资助者	National Key Research and Development Program of China
DOI	10.1016/j.jnucmat.2024.155177
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2018YFE0116200]
WOS研究方向	Materials Science ; Nuclear Science & Technology
WOS类目	Materials Science, Multidisciplinary ; Nuclear Science & Technology
WOS记录号	WOS:001249573600003
出版者	ELSEVIER
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/187184
专题	中国科学院金属研究所
通讯作者	Zhang, Lefu
作者单位	1.Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China 2.Nucl Power Inst China, Sci & Technol Reactor Syst Design Technol Lab, Chengdu 610213, Peoples R China 3.China Inst Atom Energy, Beijing 102413, Peoples R China 4.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 10083, Peoples R China 5.Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Gao, Yang,Qiu, Xi,Su, Haozhan,et al. Characterization of the oxide film formed on alumina-forming austenitic stainless steel in deaerated, DH, DO, and OT supercritical water[J]. JOURNAL OF NUCLEAR MATERIALS,2024,598:16.
APA	Gao, Yang.,Qiu, Xi.,Su, Haozhan.,Shi, Huigang.,Zhang, Lefu.,...&Guo, Xianglong.(2024).Characterization of the oxide film formed on alumina-forming austenitic stainless steel in deaerated, DH, DO, and OT supercritical water.JOURNAL OF NUCLEAR MATERIALS,598,16.
MLA	Gao, Yang,et al."Characterization of the oxide film formed on alumina-forming austenitic stainless steel in deaerated, DH, DO, and OT supercritical water".JOURNAL OF NUCLEAR MATERIALS 598(2024):16.