期刊
METALS
卷 6, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/met6040085
关键词
magnesium alloy; layered double hydroxide; Mg(OH)(2); superhydrophobicity; corrosion resistance
资金
- National Natural Science Foundation of China [21306214, 51571134, 51302155]
- Doctoral Program Foundation of the State Education Ministry [20133718120003]
- Shandong University of Science and Technology (SDUST) Research Fund [2014TDJH104]
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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