Based Alloy in Molten NaCl

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	Based Alloy in Molten NaCl
	Wang Junwei 1,2; Jia Hongguang 1,2; Wang Zhiping 3; Zhu Tong 2; Lei Fujun 1,2; Xu Jun 2
刊名	RARE METAL MATERIALS AND ENGINEERING
	2017-01
卷号	46 期号:1 页码:57-62
关键词	corrosion molten salt NaCl Al
ISSN号	1002-185X
英文摘要	NaCl and its mixed salt have many advantages as a medium of solar energy phase change thermal storage at moderate and high temperature. But molten chloride has sharp corrosive action on metal thermal storage vessel. The corrosion behavior of three kinds of Ni-10 wt% Fe based alloy (1#, 2# and 3#) in 850 degrees C molten NaCl was studied. The content of Al in 1#, 2# and 3# sample was 0.0 wt%, 5.0 wt% and 10.0 wt%, respectively. The components of NaCl after corroding and corrosion products on samples surface were analyzed. Elements change trend and corrosion characteristics on cross section of the three samples were contrasted. Corrosion mechanisms were discussed finally. Results show that the kinetics curves of the three kinds of sample obey a liner rule. The average mass loss rate declines when Al is added in the sample. The rate of 2# and 3# is only 12% and 20% of that of 1#, respectively. There are two reasons for the value reduction: firstly, Al will be oxidized prior to oxidization of Fe or Ni, and the atomic mass of Al is small; secondly, Al2O3 is very stable at high temperature as corrosion products. However, when the content of Al is very high (for example 10 wt% in here) in Ni-10 wt% Fe based alloy, Al oxidized on sample surface provides a convenient condition for Al atom transmission from sample inside to surface. Al2O3 film becomes thick and exfoliates easily. The exfoliation increases the average mass loss rate in turn.
资助项目	Natural Science Foundation of Qinghai Province[2015-ZJ-931Q]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000393538900011
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33466]
专题	兰州理工大学
通讯作者	Jia Hongguang
作者单位	1.Natl Engn Res Ctr High Performance Light Met Allo, Xining 810016, Peoples R China 2.Qinghai Univ, Xining 810016, Peoples R China 3.Lanzhou Univ Technol, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang Junwei,Jia Hongguang,Wang Zhiping,et al. Based Alloy in Molten NaCl[J]. RARE METAL MATERIALS AND ENGINEERING,2017,46(1):57-62.
APA	Wang Junwei,Jia Hongguang,Wang Zhiping,Zhu Tong,Lei Fujun,&Xu Jun.(2017).Based Alloy in Molten NaCl.RARE METAL MATERIALS AND ENGINEERING,46(1),57-62.
MLA	Wang Junwei,et al."Based Alloy in Molten NaCl".RARE METAL MATERIALS AND ENGINEERING 46.1(2017):57-62.