Corrosion behavior of a wear resistant Co-Mo-Cr-Si alloy in molten fluoride salts

doi:10.1016/j.jnucmat.2020.152529

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	Corrosion behavior of a wear resistant Co-Mo-Cr-Si alloy in molten fluoride salts
	Wu, YP ; Leng, B ; Li, XL ; Jiang, L ; Ye, XX ; Chen, YJ ; Yang, XM ; Li, ZJ ; Zhou, XT
刊名	JOURNAL OF NUCLEAR MATERIALS
	2020
卷号	542 页码:-
关键词	316 STAINLESS-STEEL NI COMPATIBILITY CHLORIDE
ISSN号	0022-3115
DOI	10.1016/j.jnucmat.2020.152529
文献子类	期刊论文
英文摘要	Evaluating the corrosion performances of wear resistant alloys is important for designing the molten salt-wetted bearings and valves in molten salt reactors. In this study, the corrosion behavior of wear-resistant Tribaloy T-400 alloy (Co-29Mo-8.5Cr-2.8Si) in molten FLiNaK salt (LiF-NaF-KF: 46.5-11.5-42 mol.%), with and without the presence of UNS N10 003 alloy, were investigated through static immersion tests at 650 degrees C. After 400 h corrosion, T-400 alloy showed greater weight loss than UNS N10 003 alloy, and the presence of UNS N10003 alloy further increased the weight loss of T-400 alloy. Electron microscopic and salt chemistry analyses showed that Cr and Co were selectively dissolved from T-400 alloy matrix after corrosion, resulting in a porous structure. On the other hand, the Laves phase precipitates were hardly corroded but showed signs of carbide formation on the surface. In addition, when tested with UNS N10 003 alloy, some of the Co dissolved from T-400 alloy transferred to the surface of UNS N10003 alloy, hence promoted the corrosion of T-400 alloy. The results have indicated that even T-400 alloy has a relatively low Cr content among high temperature wear-resistant hardfacing alloys, its corrosion resistance is still inadequate in a typical molten salt reactor environment where UNS N10003 alloy and graphite are also present. (C) 2020 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32767]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu, YP,Leng, B,Li, XL,et al. Corrosion behavior of a wear resistant Co-Mo-Cr-Si alloy in molten fluoride salts[J]. JOURNAL OF NUCLEAR MATERIALS,2020,542:-.
APA	Wu, YP.,Leng, B.,Li, XL.,Jiang, L.,Ye, XX.,...&Zhou, XT.(2020).Corrosion behavior of a wear resistant Co-Mo-Cr-Si alloy in molten fluoride salts.JOURNAL OF NUCLEAR MATERIALS,542,-.
MLA	Wu, YP,et al."Corrosion behavior of a wear resistant Co-Mo-Cr-Si alloy in molten fluoride salts".JOURNAL OF NUCLEAR MATERIALS 542(2020):-.