Microstructure and corrosion resistance of Fe-based amorphous coating prepared by detonation spray

doi:10.1016/j.surfcoat.2020.126096

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	Microstructure and corrosion resistance of Fe-based amorphous coating prepared by detonation spray
	Cui, Shuai 2; Zhai, Haimin 1; Li, Wensheng 1; Fan, Xiangjuan 1; Li, Xuqiang 1; Ning, Weichao 1; Xiong, Dangsheng 2
刊名	Surface and Coatings Technology
	2020-10-15
卷号	399
关键词	Corrosion resistance Corrosive effects Detonation Electrochemical impedance spectroscopy Galvanic corrosion Microstructure Morphology Oxygen Porosity Sodium alloys Sodium chloride Steel corrosion 3.5 wt% NaCl solution Corrosion behavior Corrosion current densities Corrosion mechanisms Corrosion potentials Detonation spraying Electrochemical test Fe-based amorphous coatings
ISSN号	02578972
DOI	10.1016/j.surfcoat.2020.126096
英文摘要	The Fe-based amorphous coatings were successfully prepared on the surface of Q235 carbon steel by detonation spraying process under different oxygen-fuel ratio (2.5, 2.0 and 1.7), and the resultant coatings were named as coating A, B and C. The macro-structure and corrosion behaviors of the coating were investigated in detail by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution. It was found that the corrosion resistance is correlated with the microstructure, phase component, and porosity of Fe-based amorphous coating. The morphology of the microdomains showed that coating B was highest dense and had no obvious defects, and the thickness, porosity was about 220 ± 10 μm, and 0.5% respectively. The electrochemical tests showed that Fe-based amorphous coating has effective protection for Q235 carbon steel in 3.5 wt% NaCl solution, and coating B has the highest corrosion potential (−283 mV vs −501 mV for coating A, −336 mV for coating C), and lowest corrosion current density (5.14 μA cm−2 vs 17.54 μA cm−2 for coating A, 9.71 μA cm−2 for coating C), and the highest the \|Z\| value (103.7 vs 103.1 for coating A, 103.4 for coating C), which indicates that coating B has superior corrosion resistance. Besides, as the oxygen-fuel ratio changes from 2.5 to 1.7, the corrosion mechanism of the coating changes from inner corrosion to galvanic corrosion. © 2020
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000563807700003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115222]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China 2.School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing; Jiangsu; 210094, China;
推荐引用方式 GB/T 7714	Cui, Shuai,Zhai, Haimin,Li, Wensheng,et al. Microstructure and corrosion resistance of Fe-based amorphous coating prepared by detonation spray[J]. Surface and Coatings Technology,2020,399.
APA	Cui, Shuai.,Zhai, Haimin.,Li, Wensheng.,Fan, Xiangjuan.,Li, Xuqiang.,...&Xiong, Dangsheng.(2020).Microstructure and corrosion resistance of Fe-based amorphous coating prepared by detonation spray.Surface and Coatings Technology,399.
MLA	Cui, Shuai,et al."Microstructure and corrosion resistance of Fe-based amorphous coating prepared by detonation spray".Surface and Coatings Technology 399(2020).