Effect of Alloy Element Al on the Corrosion Behavior of Ni-10wt%Fe Based Alloy in Molten NaCl

	Effect of Alloy Element Al on the Corrosion Behavior of Ni-10wt%Fe Based Alloy in Molten NaCl
	Wang Junwei 1; Jia Hongguang 1; Wang Zhiping 2; Zhu Tong 3; Lei Fujun 1; Xu Jun 3
	2017
发表期刊	稀有金属材料与工程
ISSN	1002-185X
卷号	46 期号:1 页码:57-62
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 °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, Al_2O_3 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. Al_2O_3 film becomes thick and exfoliates easily. The exfoliation increases the average mass loss rate in turn.
关键词	corrosion molten salt NaCl Al NaCl Al
收录类别	CSCD
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	METALLURGY METALLURGICAL ENGINEERING
CSCD记录号	CSCD:5902147
出版者	Science Press
EI入藏号	20171203457276
EI主题词	Aluminum corrosion
EI分类号	539.1 Metals Corrosion - 541.1 Aluminum - 545.2 Iron Alloys - 657.1 Solar Energy and Phenomena - 804.2 Inorganic Compounds
引用统计
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/72291
专题	兰州理工大学
作者单位	1.Qinghai University, National Engineering Research Center of High Performance Light Metal Alloys and Forming, Xining, Qinghai 810016, China 2.Lanzhou University of Technology, Lanzhou, Gansu 730050, China 3.Qinghai University, Xining, Qinghai 810016, 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]. 稀有金属材料与工程,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.稀有金属材料与工程,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".稀有金属材料与工程 46.1(2017):57-62.