Effect of Pre-Oxidation Treatment on the Corrosion Resistance in Stagnant Liquid Pb-Bi Eutectic of 12Cr Ferritic/Martensitic Steel

doi:10.11900/0412.1961.2022.00267

IMR OpenIR

	Effect of Pre-Oxidation Treatment on the Corrosion Resistance in Stagnant Liquid Pb-Bi Eutectic of 12Cr Ferritic/Martensitic Steel
	Pan Xia 1,2; Zhang Yangpeng 1,3; Dong Zhihong 1; Chen Shenghu 1,3; Jiang Haichang 1,3; Rong Lijian 1,3
通讯作者	Zhang Yangpeng(ypzhang@imr.ac.cn)
	2024-05-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:5 页码:639-649
摘要	Lead-cooled fast reactors using liquid lead or lead-bismuth eutectic (LBE) alloy coolants have attracted international attention due to their unique advantages in safety, economy, and sustainable development. The availability of suitable core materials is one of the key challenges restricting the development and application of the lead-cooled fast reactor technology. Ferritic/martensitic steel is one of the important candidates for nuclear reactor fuel cladding, but the dissolution of Cr and Ni occurs in it upon contact with high-temperature LBE, resulting in cladding failure. Adding Si can improve corrosion resistance, and based on this property, previous work developed a high-Si ferritic/martensitic steel for LBE alloycooled fast reactor. Recently, pre-oxidation treatment was proposed to further improve the corrosion performance of steel in contact with LBE. However, the structure of the oxide film formed after the pre-oxidation of 12Cr ferritic/martensitic steel, the effect on corrosion resistance, and the failure mechanism are not clear. In this study, a pre-oxidized film was formed on the steel surface and its structure was characterized. Steel corrosion experiments using oxygen-saturated LBE at 550 degrees C were also performed to analyze the influence of pre-oxidation treatment on the LBE alloy coolant corrosion resistance of steel. The results demonstrated that the oxide films formed when steel is pre-oxidized at 720 degrees C in 1%O-2 + 99%N-2 atmosphere for 1 h are mainly (Fe, Cr)(2)O-3 and MnCr2O4 oxides. The oxide films can effectively prevent the outward diffusion of Fe in steel and the inward diffusion of O in LBE, thereby improving the corrosion resistance of steel to stagnant oxygen-saturated LBE alloy coolant at 550 degrees C. However, due to the high diffusion rate of Mn and its high solubility in LBE alloys, the Mn in the pre-oxidized film will gradually diffuse and dissolve into the LBE alloy, rendering subsequently a part of the oxide film ineffective and forming a localized corrosion zone. After 1000 h of Pb-Bi corrosion, the local corrosion area on the alloy surface can reach 60%. This study revealed the microstructure, protective effect, and failure mechanism of the pre-oxidized film on the surface of high-Si ferritic/martensitic steel, and suggested research directions for further improving the effectiveness and stability of the pre-oxidized film.
关键词	lead-bismuth eutectic cooled fast reactor ferritic/martensitic steel surface treatment Pb-Bi corrosion pre-oxidized film
DOI	10.11900/0412.1961.2022.00267
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001208805900006
出版者	SCIENCE PRESS
引用统计	被引频次：5[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/321006/185773
专题	中国科学院金属研究所
通讯作者	Zhang Yangpeng
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Pan Xia,Zhang Yangpeng,Dong Zhihong,et al. Effect of Pre-Oxidation Treatment on the Corrosion Resistance in Stagnant Liquid Pb-Bi Eutectic of 12Cr Ferritic/Martensitic Steel[J]. ACTA METALLURGICA SINICA,2024,60(5):639-649.
APA	Pan Xia,Zhang Yangpeng,Dong Zhihong,Chen Shenghu,Jiang Haichang,&Rong Lijian.(2024).Effect of Pre-Oxidation Treatment on the Corrosion Resistance in Stagnant Liquid Pb-Bi Eutectic of 12Cr Ferritic/Martensitic Steel.ACTA METALLURGICA SINICA,60(5),639-649.
MLA	Pan Xia,et al."Effect of Pre-Oxidation Treatment on the Corrosion Resistance in Stagnant Liquid Pb-Bi Eutectic of 12Cr Ferritic/Martensitic Steel".ACTA METALLURGICA SINICA 60.5(2024):639-649.