Development of metal-organic framework(MOF) decorated graphene oxide/Mg Al-layered double hydroxide coating via microstructural optimization for anti-corrosion micro-arc oxidation coatings of magnesium alloy

作     者：Yanning Chen Liang Wu Wenhui Yao Jiahao Wu Jianpeng Xiang Xiaowei Dai Tao Wu Yuan Yuan Jingfeng Wang Bin Jiang Fusheng Pan Yanning Chen;Liang Wu;Wenhui Yao;Jiahao Wu;Jianpeng Xiang;Xiaowei Dai;Tao Wu;Yuan Yuan;Jingfeng Wang;Bin Jiang;Fusheng Pan

作者机构：College of Materials Science and EngineeringChongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing 400044China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第130卷第35期

页      面：12-26页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos.51971040,52171101) the Natural Science Foundation of Chongqing (No.cstc2021jcyj-msxm X0613) the National Natural Science Foundation of China (Nos.52001036,51971044) the Independent Research Project of State Key Laboratory of Mechanical Transmissions (No.SKLMT-ZZKT-2021M11)。 

主　　题：Zeolitic-imidazole framework Layered double hydroxide Graphene oxide Micro-arc oxidation Corrosion protection Magnesium alloy 

摘      要：An efcient and simple in-situ growth strategy has been discovered for the preparation of highly reproducible and continuous symbiotic ZIF-8-based anticorrosion coating by using graphene oxide(GO)/Mg AlNO3layered double hydroxides(G/LDHs) buffer layer as a new type of connecting carrier based on micro-arc oxide(MAO) coating of AZ31 magnesium alloy. The components of ZIF-8 were adsorbed and bounded to the surface of the G/LDHs buffer layer-modified substrates to promote the nucleation of ZIF-8,thus growing a phase-pure, uniform, and good symbiosis ZIF-8 membrane. ZIF-8 particles with different growth times compensate for the grain boundary defects of the G/LDHs coating precursor buffer layer to different degrees. The prepared ZIF-8-based coating has excellent stability and corrosion resistance. The results demonstrate that the G/LDHs buffer layer provides a new channel for the MOF-modified MAO substrate of AZ31 magnesium alloy. It also proves that it is feasible to build high-performance anticorrosive coatings with MOF materials.