Effect of alloy element Al on the corrosion behavior of Ni-10wt%Fe based alloy in molten NaCl

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	Effect of alloy element Al on the corrosion behavior of Ni-10wt%Fe 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	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
	2017
卷号	46 期号:1 页码:57-62
关键词	Alumina Aluminum Aluminum oxide Binary alloys Corrosion Corrosive effects Heat storage High temperature corrosion Iron alloys Sodium chloride Solar energy Corrosion behavior Corrosion characteristics Corrosion mechanisms Corrosion products High temperature Molten salt NaCl Phase-change thermal storages
ISSN号	1002185X
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 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. Copyright © 2017, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.
语种	英语
出版者	Rare Metals Materials and Engineering Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114782]
专题	兰州理工大学
作者单位	1.National Engineering Research Center of High Performance Light Metal Alloys and Forming, Xining; 810016, China; 2.The College of Mechanical Engineering, Qinghai University, Xining; 810016, China; 3.Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wang, Junwei,Jia, Hongguang,Wang, Zhiping,et al. Effect of alloy element Al on the corrosion behavior of Ni-10wt%Fe based alloy in molten NaCl[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2017,46(1):57-62.
APA	Wang, Junwei,Jia, Hongguang,Wang, Zhiping,Zhu, Tong,Lei, Fujun,&Xu, Jun.(2017).Effect of alloy element Al on the corrosion behavior of Ni-10wt%Fe based alloy in molten NaCl.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,46(1),57-62.
MLA	Wang, Junwei,et al."Effect of alloy element Al on the corrosion behavior of Ni-10wt%Fe based alloy in molten NaCl".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 46.1(2017):57-62.