Controllable superhydrophobic surfaces with tunable adhesion on Mg alloys by a simple etching method and its corrosion inhibition performance

被引:111
|
作者
Wei, Dongsong [1 ,2 ]
Wang, Jinguo [1 ,2 ]
Liu, Yan [3 ]
Wang, Dawei [1 ,2 ]
Li, Shuyi [3 ]
Wang, Huiyuan [1 ,2 ]
机构
[1] Jilin Univ, Minist Educ, Key Lab Automobile Mat, Changchun 130025, Peoples R China
[2] Jilin Univ, Sch Mat Sci & Engn, Changchun 130025, Peoples R China
[3] Jilin Univ, Minist Educ, Key Lab Bion Engn, Changchun 130025, Peoples R China
基金
中国国家自然科学基金;
关键词
Magnesium alloy; Superhydrophobicity; Wetting model; Tunable water adhesion; Corrosion resistance; SUPER-HYDROPHOBIC SURFACE; AZ91D MAGNESIUM ALLOY; WATER ADHESION; FABRICATION; LOTUS; PROTECTION; RESISTANCE; COATINGS; BEHAVIOR; MICROSTRUCTURE;
D O I
10.1016/j.cej.2020.126444
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Through a simple chemical etching and surface modification, superhydrophobic surfaces with tunable water adhesion were prepared on rolled Mg-3Al-1Zn (AZ31) and Mg-9Al-1Zn (AZ91) alloy sheets. The different water adhesion is described by three different wetting model, i.e. Wenzel, Cassie impregnating, and Cassie model. An in-depth investigation on anti-corrosion performances of low adhesive superhydrophobic AZ31 and AZ91 surfaces reveals that dense microstructure can effectively improve the stability of Cassie state, thus facilitating durable anti-corrosion ability. Simultaneously, the superhydrophobic surfaces with tunable water adhesion are demonstrated to be feasible in the application of low-loss transport of microdroplet. In addition, the as-fabricated superhydrophobic surfaces show high-temperature stability and chemical stability in a large range of temperature and pH, respectively. It is expected that this research can shed light on designing new anti-corrosion and tunable adhesive superhydrophobic surfaces, and as-fabricated superhydrophobic Mg alloys are promising in medical instruments, transport systems, micro-fluidic devices, and so on.
引用
收藏
页数:13
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