Fabrication of Superhydrophobic Zn-Ni Coatings on LA43M Magnesium Alloy

被引：15
作者：
Wang, Zhihua [1 ,2 ]
Li, Yanchao [1 ,3 ]
Zhang, Guojun [1 ]
机构：
[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian, Peoples R China
[2] Xian Univ Sci & Technol, Sch Mat Sci & Engn, Xian, Peoples R China
[3] Northwest Inst Nonferrous Met Res, Xian, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2022年 / 31卷 / 07期
关键词：
corrosion resistance; Mg alloy; superhydrophobic; Zn-Ni coatings; STEP HYDROTHERMAL PROCESS; CORROSION-RESISTANCE; ELECTROCHEMICAL PROPERTIES; HIGHLY ANTICORROSION; OXIDATION COATINGS; SURFACE; MICROSTRUCTURE; PROTECTION; MG; ELECTRODEPOSITION;
D O I：
10.1007/s11665-022-06670-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The superhydrophobic Zn-Ni coatings with porous microstructures were prepared on LA43M Mg alloys substrate by dynamic hydrogen bubble template method. The effects of Ce-2(SO4)(3) concentrations on the coating structure and wettability were studied. It was found that the contact angle of superhydrophobic coatings could be up to 157.4 +/- 0.7 degrees by changing concentrations of cerium sulfate in baths. XRD revealed that the coatings with porous microstructures mainly consisted of gamma-Ni5Zn21, delta-Ni3Zn22, and CeNi5. Polarization measurements demonstrated that corrosion current density value of 6.0 x 10(-7) A cm(-2) of the coating was lower than that of the substrate, which means that the coatings are effective to improve the anti-corrosion performance of LA43M magnesium alloys. EIS showed that the coating served as a barrier to resist charge transfer. The study provides a new means to develop coatings with superhydrophobic performance on the LA43M magnesium alloys surface, which is in favor of the application of Mg alloys.
引用
收藏
页码：5333 / 5339
页数：7
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