Corrosion Resistance of the Superhydrophobic Mg(OH)2/Mg-Al Layered Double Hydroxide Coatings on Magnesium Alloys

被引：69
作者：
Zhang, Fen [1 ,2 ,3 ]
Zhang, Changlei [1 ,2 ,3 ]
Zeng, Rongchang [1 ,2 ,3 ]
Song, Liang [4 ]
Guo, Lian [1 ,2 ,3 ]
Huang, Xiaowen [1 ]
机构：
[1] Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Peoples R China
[2] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China
[3] Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266590, Peoples R China
[4] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
来源：
METALS | 2016年 / 6卷 / 04期
基金：
中国国家自然科学基金;
关键词：
magnesium alloy; layered double hydroxide; Mg(OH)(2); superhydrophobicity; corrosion resistance; HIERARCHICAL STRUCTURE; HYDROPHOBIC SURFACE; MG ALLOY; FABRICATION; PROTECTION; BEHAVIOR; ANTICORROSION; OXIDATION; SYSTEMS; FILM;
D O I：
10.3390/met6040085
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Coatings of the Mg(OH)(2)/Mg-Al layered double hydroxide (LDH) composite were formed by a combined co-precipitation method and hydrothermal process on the AZ31 alloy substrate in alkaline condition. Subsequently, a superhydrophobic surface was successfully constructed to modify the composite coatings on the AZ31 alloy substrate using stearic acid. The characteristics of the composite coatings were investigated by means of X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electronic microscope (SEM) and contact angle (CA). The corrosion resistance of the coatings was assessed by potentiodynamic polarization, the electrochemical impedance spectrum (EIS), the test of hydrogen evolution and the immersion test. The results showed that the superhydrophobic coatings considerably improved the corrosion resistant performance of the LDH coatings on the AZ31 alloy substrate.
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页数：14
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