Electrochemical study of the corrosion of a Ni-based alloy GH3535 in molten (Li,Na,K)F at 700 degrees C

IMR OpenIR

	Electrochemical study of the corrosion of a Ni-based alloy GH3535 in molten (Li,Na,K)F at 700 degrees C
	Wang, Yanli; Liu, Huijun; Yu, Guojun; Hou, Juan; Zeng, Chaoliu; liuhj@imr.ac.cn
	2015
发表期刊	JOURNAL OF FLUORINE CHEMISTRY
ISSN	0022-1139
卷号	178 页码:14-22
摘要	The compatibility of structural materials with molten fluoride salts is an immediate challenge for the application and development of molten salt reactor (MSR) operating at high temperatures. In the present presentation, the corrosion behavior of a nickel-based alloy GH3535 has been examined in an eutectic (Li,Na,K)F melt at 700 degrees C under Ar and Ar-5%H2O, respectively, by some electrochemical techniques. Moreover, the effect of the additive CrF3 with concentrations of 0.09 and 0.18 M on the corrosion of the alloy in the melt has also been investigated in an attempt to understand the corrosion mechanism involving the multivalent transition metal Cr ions Cr2+/Cr3+. It is shown that the alloy is in active dissolution state at the corrosion potential and its corrosion occurs mainly through the preferential dissolution of Cr from the substrate, producing a Cr-depleted layer and some internal voids. The introduction of 5%H2O in Ar accelerates obviously the corrosion of the alloy, giving rise to the formation of a wider Cr-depleted layer where some Cr-rich internal oxides are formed over the internal voids. CrF3 itself acts as an oxidizer to accelerate the dissolution of Cr, with a more significant effectiveness observed for a higher CrF3 content. (C) 2015 Elsevier B.V. All rights reserved.
部门归属	[wang, yanli ; liu, huijun ; zeng, chaoliu] chinese acad sci, lab corros & protect, inst met res, shenyang 110016, peoples r china ; [yu, guojun ; hou, juan] chinese acad sci, shanghai inst appl phys, shanghai 201800, peoples r china
关键词	Ni-based Alloy Gh3535 Molten Fluorides Corrosion Chromium Fluorides Electrochemical Techniques
资助者	National Natural Science Foundation of China [51271190]
收录类别	sci
语种	英语
WOS记录号	WOS:000362929600003
引用统计	被引频次：55[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/321006/74813
专题	中国科学院金属研究所
通讯作者	liuhj@imr.ac.cn
推荐引用方式 GB/T 7714	Wang, Yanli,Liu, Huijun,Yu, Guojun,et al. Electrochemical study of the corrosion of a Ni-based alloy GH3535 in molten (Li,Na,K)F at 700 degrees C[J]. JOURNAL OF FLUORINE CHEMISTRY,2015,178:14-22.
APA	Wang, Yanli,Liu, Huijun,Yu, Guojun,Hou, Juan,Zeng, Chaoliu,&liuhj@imr.ac.cn.(2015).Electrochemical study of the corrosion of a Ni-based alloy GH3535 in molten (Li,Na,K)F at 700 degrees C.JOURNAL OF FLUORINE CHEMISTRY,178,14-22.
MLA	Wang, Yanli,et al."Electrochemical study of the corrosion of a Ni-based alloy GH3535 in molten (Li,Na,K)F at 700 degrees C".JOURNAL OF FLUORINE CHEMISTRY 178(2015):14-22.