Preparing superhydrophobic nanocomposite coating with SiO2 nanoparticles on magnesium alloy

被引:22
作者
Luo, Yufang [1 ]
Yao, Wenhui [2 ,3 ]
Fu, Wensheng [1 ]
Wu, Liang [2 ,3 ]
Zhang, Dingfei [2 ,3 ]
Pan, Fusheng [2 ,3 ]
机构
[1] Chongqing Normal Univ, Coll Chem, Chongqing, Peoples R China
[2] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[3] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing, Peoples R China
基金
中国国家自然科学基金;
关键词
Superhydrophobic; magnesium alloy; nanocomposite coating; corrosion protection; facile preparation; CORROSION-RESISTANCE; ROBUST; TRANSPARENT; PROTECTION;
D O I
10.1080/02670844.2020.1840803
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Magnesium (Mg) alloys attract a lot of attention owing to their superior properties, while the poor corrosion resistance significantly restricts their extensive applications in practice. The development of a superhydrophobic coating can effectively decrease the contact area between corrosive solutions and the Mg substrate, consequently providing corrosion protection. Herein, a facile approach was proposed, with low cost and no damage to the environment. A nanocomposite coating composed of polyvinylidene fluoride and chemically modified SiO2 nanoparticles was successfully constructed on the Mg alloy by a spraying method. The nanocomposite coating presented irregular structures with accumulated SiO2 nanoparticles, entrapped a lot of air pockets. The water contact angle was up to 151.8 degrees. The corrosion current density was reduced by one order of magnitude compared to that of the bare substrate. Therefore, the nanocomposite coating can provide good corrosion protection for the Mg substrate, accelerating the extensive applications of Mg alloys.
引用
收藏
页码:1231 / 1238
页数:8
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