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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

查看全文 作　　者：Yanning [1,2]Chen;Liang [1,2]Wu;Wenhui [1,2]Yao;Jiahao [1,2]Wu;Jianpeng [1,2]Xiang;Xiaowei [1,2]Dai;Tao [1,2]Wu;Yuan [1,2]Yuan;Jingfeng [1,2]Wang;Bin [1,2]Jiang;Fusheng [1,2]Pan 高影响力作者 机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;[2]National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044,China高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2022年第35期,共15页高影响力期刊 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)。 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. 关 键 词：Zeolitic-imidazole framework Layered double hydroxide Graphene oxide Micro-arc oxidation Corrosion protection Magnesium alloy
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