Double-anticorrosion ability of in-situ superhydrophobic MgAl-LDH coating with excellent stability of the corrosion resistance on magnesium alloy AZ31

被引：6
作者：
Han, Xing [1 ]
Wang, Yongqin [1 ]
Hu, Jia [1 ,2 ,5 ]
Xiao, Tianbing [3 ,6 ]
Li, Jianjun [4 ,7 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing, Peoples R China
[3] Peoples Hosp Fengjie, Chongqing, Peoples R China
[4] Tradit Chinese Med Hosp Fengjie, Chongqing, Peoples R China
[5] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[6] Peoples Hosp Fengjie, Chongqing 404600, Peoples R China
[7] Tradit Chinese Med Hosp Fengjie, Chongqing 404600, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2023年 / 74卷 / 05期
关键词：
corrosion resistance; double-anticorrosion; LDH coating; magnesium alloys; superhydrophobic; LAYERED DOUBLE HYDROXIDE; FILMS; PROTECTION; FABRICATION; ANIONS;
D O I：
10.1002/maco.202213616
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We reported the realization of superhydrophobic layered double hydroxide (LDH) coating with the double-anticorrosion mechanism on magnesium alloys. This coating was prepared via in-situ growth of LDHs on the etched AZ31 alloy and the modification was caused by 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane. The water contact angle on the coating was as large as 161 degrees, possessing the two-scale rough structure consisting of microislands and LDH crystal nanosheets. The excellent corrosion resistance properties of the superhydrophobic LDH coating can be attributed to the double-anticorrosion mechanism associated with LDH coating and superhydrophobic structure. In addition to the active protection of LDH coating, the passive protection of superhydrophobic coating can suppress the occurrence of ion-exchange reactions, leading to excellent corrosion resistance stability.
引用
收藏
页码：754 / 765
页数：12
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