Corrosion resistance and superhydrophobicity of one-step polypropylene coating on anodized AZ31 Mg alloy

作     者：Zhao-Qi Zhang Li Wang Mei-Qi Zeng Rong-Chang Zeng Cun-Guo Lin Zhen-Lin Wang Dong-Chu Chen Qiang Zhang Zhao-Qi Zhang;Li Wang;Mei-Qi Zeng;Rong-Chang Zeng;Cun-Guo Lin;Zhen-Lin Wang;Dong-Chu Chen;Qiang Zhang

作者机构：Corrosion Laboratory for Light MetalsCollege of Material Science and EngineeringShandong University of Science and TechnologyQingdao 266590China State Key Laboratory for Marine Corrosion and ProtectionLuoyang Ship Material Research InstituteQingdao 266101China School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450002China College of Materials Science and EngineeringChongqing University of TechnologyChongqing 400065China School of Materials Science and Energy EngineeringFoshan UniversityFoshan 528000China 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2021年第9卷第4期

页      面：1452-1466页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was supported by the National Natural Science Foundation of China(51571134) the SDUST Research Fund(2014TDJH104) 

主　　题：Magnesium alloy Corrosion resistance Superhydrophobicity Bonding strength Polymer coating 

摘      要：Superhydrophobic coatings have been considerably used in corrosion and its protection of metallic *** the comprehensive performance(hydrophobicity,bonding strength,and corrosion resistance,etc.)of the top coating may be highly dependent on the physical and chemical properties of the primer or under ***,an integrated superhydrophobic polypropylene(PP)coating was fabricated on the micro-arc oxidized Mg substrate via one-step *** morphologies and chemical compositions of the composite coating were examined through Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),and field-emission scanning electron microscopy(FESEM)together with X-ray photoelectron spectroscopy(XPS).The surface wettability of the coating was determined by contact angle and sliding *** corrosion-resistant performance was evaluated via electrochemical and immersion *** results showed that the hybrid coating possessed micron-scaled granular structure on the surface with a high water contact angle of 167.2±0.8°and a low water sliding angle of 2.7±0.5°.The corrosion resistance of superhydrophobic coating was obviously enhanced with a low corrosion current density of 8.76×10^(−9)A/cm^(2),and the coating still maintained integrity after 248 h of immersion in 3.5wt%NaCl aqueous *** MAO coating provides better adhesion of PP to the ***,the superhydrophobic coating exhibited superior bonding strength,corrosion resistance and durability.