NDLI: A Durable $PVDF/PFOTES-SiO_{2}$ Superhydrophobic Coating on AZ31B Mg Alloy with Enhanced Abrasion Resistance Performance and Anti-Corrosion Properties

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A Durable $PVDF/PFOTES-SiO_{2}$ Superhydrophobic Coating on AZ31B Mg Alloy with Enhanced Abrasion Resistance Performance and Anti-Corrosion Properties

Content Provider	MDPI
Author	Qian, Zhiqiang Liu, Zhong Wang, Shidong Ye, Xiushen Wu, Zhijian
Copyright Year	2021
Description	A simple and practical spray method is employed to prepare a $PVDF/PFOTES-SiO_{2}$ superhydrophobic composite coating on the AZ31B Mg alloy substrate. The morphology, composition, and water contact angle (CA) were measured by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM) and contact angle measuring instrument. Hydrophilic $nano-SiO_{2}$ is modified by PFOTES to obtain hydrophobicity. The influence of the mass of $PFOTES-SiO_{2}$ to PVDF on the hydrophobic properties was studied. The wear resistance and stability of the composite coating have been investigated by immersion test, cross-cut adhesion test and friction test. Additionally, the corrosion resistance was measured by electrochemical workstation and salt spray corrosion test. The CA of $PVDF/PFOTES-SiO_{2}$ coating is 161.3° and the sliding angle (SAs) is less than 2°. After 10× the sandpaper friction test, the superhydrophobic contact angle of the coating remained above 155°, and the sliding angle was less than 5°, which indicated that the prepared coating is a strong superhydrophobic coating with good wear resistance. The results of the electrochemical tests show that the superhydrophobic coating improved the anti-corrosion performance of Mg alloy, and the water contact angle is greater than 150° after 168 h salt spray corrosion test. Due to its excellent superhydrophobicity, wear resistance and anti-corrosion properties, the robust $PVDF/PFOTES-SiO_{2}$ coating is considered to have great potential for future applications in the automotive and marine industries.
Starting Page	11172
e-ISSN	20763417
DOI	10.3390/app112311172
Journal	Applied Sciences
Issue Number	23
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-11-25
Access Restriction	Open
Subject Keyword	Applied Sciences Coatings and Films Superhydrophobic Mg Alloy Corrosion Resistance Wear Resistance
Content Type	Text
Resource Type	Article

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