A self-healing superamphiphobic coating for efficient corrosion protection of magnesium alloy

doi:10.1016/j.jcis.2020.04.097

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	A self-healing superamphiphobic coating for efficient corrosion protection of magnesium alloy
	Zhao, Xia 2; Wei, Jinfei 2,3; Li, Bucheng 3; Li, Sibei 4; Tian, Ning 1,3; Jing, Lingyun 2; Zhang, Junping 1,3
	2020-09-01
关键词	Atmospheric corrosion Chlorine compounds Contact angle Corrosion prevention Corrosion resistance Corrosion resistant alloys Diffusion coatings Electrochemical corrosion Electrochemical impedance spectroscopy Epoxy resins Magnesium alloys Scanning electron microscopy Seawater corrosion Self-healing materials SpectroscopyAnticorrosion performance Bi-layer structure Corrosive solution Immersion tests Neutral salt spray test Potentiodynamic polarization curves Sliding angle Synergistic effect
卷号	575
DOI	10.1016/j.jcis.2020.04.097
页码	140-149
英文摘要	Magnesium alloys have many excellent properties, but the poor corrosion resistance seriously hinders their widespread applications. Here, we report a self-healing superamphiphobic coating for efficient corrosion protection of magnesium alloy by the combination of a compact self-healing epoxy resin (SHEP) coating and a porous superamphiphobic coating. The coating shows (i) excellent superamphiphobicity with high contact angle, low sliding angle and robust impact/bounce behavior, (ii) excellent anti-corrosion performance as demonstrated by the potentiodynamic polarization curves and electrochemical impedance spectroscopy, and (iii) excellent self-healing performance as proved by the scanning electron microscopy and electrochemical impedance spectroscopy. This is owing to synergistic effect of the bi-layer structure. Furthermore, the healed coating retained excellent anti-corrosion performance according to the immersion test and neutral salt spray test. This is because the SHEP layer can effectively drive repair of microstructure of the superamphiphobic layer, and then recover of superamphiphobicity. Therefore, the contact area and contact time of corrosive solutions with the pristine and healed coatings are limited, which efficiently prevents diffusion of corrosive substances such as water, chloride ions and oxygen. The self-healing superamphiphobic coating may find applications in protection of various metal alloys. © 2020 Elsevier Inc.
会议录	Journal of Colloid and Interface Science
会议录出版者	Academic Press Inc.
语种	英语
ISSN号	00219797
WOS研究方向	Chemistry
WOS记录号	WOS:000538935500015
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132656]
专题	石油化工学院
作者单位	1.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; 2.Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou; 730000, China; 4.Department of Physics, Beijing Normal University, Beijing; 100875, China
推荐引用方式 GB/T 7714	Zhao, Xia,Wei, Jinfei,Li, Bucheng,et al. A self-healing superamphiphobic coating for efficient corrosion protection of magnesium alloy[C]. 见:.