Corrosion Behavior of Aluminum-Forming Alloy 310S for Application in Molten Chloride Salt CSP Thermal Storage Tank

doi:10.3389/fmats.2022.886285

	Corrosion Behavior of Aluminum-Forming Alloy 310S for Application in Molten Chloride Salt CSP Thermal Storage Tank
	Wei, Ying 1,2; La, Peiqing 1; Jin, Jing 1; Du, Mingchen 1; Zheng, Yuehong 1; Zhan, Faqi 1; Sheng, Jie 1; Yu, Haicun 1; Zhu, Min 1
刊名	FRONTIERS IN MATERIALS
	2022-05-19
卷号	9
关键词	aluminum-forming alloy concentrated solar power corrosion molten salt chloride passivation
ISSN号	2296-8016
DOI	10.3389/fmats.2022.886285
英文摘要	The key to the new generation of solar thermal power plants is to increase the operating temperature of molten salt to 800 degrees C, and change the heat transfer medium from nitric acid mixed salt to chlorine mixed salt, so as to significantly reduce the cost of power generation. Therefore, the alloy material's resistance to high temperatures and fusible chloride salt is one of the core technologies for the successful implementation of concentrated solar power (CSP) technology. In this study, the aluminum-forming alloy (AFA) 310S for the heat storage tank was prepared by the aluminum-thermal reaction casting method. The hot corrosion behavior and mechanism of AFA 310S in chloride molten salt at 800 degrees C were studied by static immersion etching for 600 h. AFA 310S exhibits good thermal corrosion properties in KCl 20.4 wt% + MgCl2-55.1 wt% + NaCl 24.5 wt%. The results indicate that compared with commercial 310S, AFA 310S has better oxidation resistance at 800 degrees C. At the initial stage of corrosion, dense Cr2O3 and continuous Al2O3 passivation films are formed. At the same time, MgO-rich oxidation products were produced in the outermost layers of the two alloys during the 600 h process. Over time, however, the damage caused by chlorine became more apparent, mainly due to the oxidation-chlorination process of the metal. A large number of cavities and cracks on the surface are formed, and the oxide layer has obvious spalling. When the Al element was added into the alloy, the dense passivation film could be formed after 120 h of corrosion with the stronger corrosion resistance. The experiment simulated the corrosion behavior in the worst environment, such as air, unoxidized alloy, molten salt without corrosion inhibitor, etc. By weight loss calculation, commercial 310S plate is completely unsuitable for CSP plant. The corrosion rates of the two alloys are compared as follows: commercial 310S > AFA 310S. To sum up, AFA 310S has a good application prospect in concentrated solar power.
WOS研究方向	Materials Science
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000806283100001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158658]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室学科建设与学位办公室
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou, Peoples R China; 2.Lanzhou Vocat Tech Coll, Dept Automot Engn & Transportat, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Wei, Ying,La, Peiqing,Jin, Jing,et al. Corrosion Behavior of Aluminum-Forming Alloy 310S for Application in Molten Chloride Salt CSP Thermal Storage Tank[J]. FRONTIERS IN MATERIALS,2022,9.
APA	Wei, Ying.,La, Peiqing.,Jin, Jing.,Du, Mingchen.,Zheng, Yuehong.,...&Zhu, Min.(2022).Corrosion Behavior of Aluminum-Forming Alloy 310S for Application in Molten Chloride Salt CSP Thermal Storage Tank.FRONTIERS IN MATERIALS,9.
MLA	Wei, Ying,et al."Corrosion Behavior of Aluminum-Forming Alloy 310S for Application in Molten Chloride Salt CSP Thermal Storage Tank".FRONTIERS IN MATERIALS 9(2022).