Long-term corrosion protection for magnesium alloy by two-layer self-healing superamphiphobic coatings based on shape memory polymers and attapulgite

doi:10.1016/j.jcis.2021.03.005

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	Long-term corrosion protection for magnesium alloy by two-layer self-healing superamphiphobic coatings based on shape memory polymers and attapulgite
	Zhang, Jiaojiao 1,2,4; Wei, Jinfei 1,2; Li, Bucheng 1,2; Zhao, Xia 4; Zhang, Junping 1,2,3
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2021
卷号	594 页码:836-847
关键词	Shape memory polymers Superamphiphobic Self-healing Anti-corrosion Mg alloy
ISSN号	0021-9797
DOI	10.1016/j.jcis.2021.03.005
英文摘要	Magnesium (Mg) alloy has wide potential applications due to its unique properties, but is apt to corrosion. Recently, superhydrophobic coatings are receiving great interest for corrosion protection of metals but suffer from short lifespan. Here, we report a strategy for long-term corrosion protection of Mg alloy by designing two-layer self-healing superamphiphobic coatings based on shape memory polymers (SMP) and attapulgite. The superamphiphobic coatings are composed of a bottom SMP coating containing a corrosion inhibitor (1, 2, 3-benzotriazole, BTA) and ceresine wax microparticles and a top superamphiphobic attapulgite coating. The two-layer self-healing coatings have excellent superamphiphobicity and initial anti-corrosion performance. The Mg alloy with the coatings can withstand immersion in 3.5 wt% NaCl solution for 80 days and neutral salt spray with 5 wt% NaCl for 54 days. Furthermore, the coatings show excellent self-healing capability towards various physical damages, such as 10 scratching/self-healing cycles at the same position, hexagonal star scratching and grid scratching. Moreover, the physically damaged coatings exhibit self-healing behavior of the microstructure and superhydrophobicity, driven by the shape memory effect of the bottom SMP layer. Thus, the self-healed coatings can still withstand 60 days & nbsp;of 3.5 wt% NaCl solution immersion and 30 days of 5 wt% NaCl salt spray. This study paves the way for applying super anti-wetting coatings for long-term corrosion protection of metals.& nbsp; (c) 2021 Elsevier Inc. All rights reserved.
WOS研究方向	Chemistry
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000642270300009
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148180]
专题	石油化工学院
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Key Lab Clay Mineral Appl Res Gansu Prov, Lanzhou 730000, Peoples R China; 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Lanzhou 730000, Peoples R China; 3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; 4.Lanzhou Univ Technol, Coll Petrochem Engn, Dept Chem Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jiaojiao,Wei, Jinfei,Li, Bucheng,et al. Long-term corrosion protection for magnesium alloy by two-layer self-healing superamphiphobic coatings based on shape memory polymers and attapulgite[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2021,594:836-847.
APA	Zhang, Jiaojiao,Wei, Jinfei,Li, Bucheng,Zhao, Xia,&Zhang, Junping.(2021).Long-term corrosion protection for magnesium alloy by two-layer self-healing superamphiphobic coatings based on shape memory polymers and attapulgite.JOURNAL OF COLLOID AND INTERFACE SCIENCE,594,836-847.
MLA	Zhang, Jiaojiao,et al."Long-term corrosion protection for magnesium alloy by two-layer self-healing superamphiphobic coatings based on shape memory polymers and attapulgite".JOURNAL OF COLLOID AND INTERFACE SCIENCE 594(2021):836-847.