Protective Coatings Containing ZnMOF-BTA Metal–Organic Framework for Active Protection of AA2024-T3  

作　　者：Izuchukwu K.Nwokolo Hongwei Shi Paul CUzoma Sharjeel Ahmed Jiwen Li Fuchun Liu 

机构地区：[1]CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Hefei,230026,China [3]School of Materials Science and Engineering,Shenyang University of Technology,Shenyang,110870,China [4]ZJU-UIUC Institute,International Campus,Zhejiang University,Haining,314400,China [5]Institute of Corrosion Science and Technology,Guangzhou,510530,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2023年第11期1893-1908,共16页金属学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52171089 and 51571202);the LingChuang Research Project of China National Nuclear Corporation(No.E041F212Z1).

摘　　要：ZnMOF-BTA,a new metal–organic framework with excellent anti-corrosion properties was prepared and characterized.Polarization and immersion tests in 3.5 wt%NaCl were performed on AA2024-T3 alloy to assess the corrosion inhibition ability of ZnMOF-BTA.It showed an inhibition efficiency of more than 90%,indicating excellent corrosion inhibition of ZnMOF-BTA on AA 2024-T3 in NaCl.Moreover,ZnMOF-BTA particles were incorporated into polyurethane coatings to create corrosion-resistant coatings.Electrochemical tests and neutral salt spray analysis were used to assess the corrosion protection ability of ZnMOF-BTA-laden polyurethane coatings.The results of electrochemical impedance spectra clearly showed the outstanding corrosion resistance and durability of ZnMOF-BTA coatings after 1440 h of immersion with a high pore resistance(Rpo)of 1.76×10^(10)Ωcm^(2).In addition,during the cross-cut adhesion test,the coating did not detach from the substrate,and after the impact test,there was scarcely any indication of a fracture,which further supports the notion that the coating has strong adhesion to the substrate.

关 键 词：Aluminum alloy BENZOTRIAZOLE Corrosion inhibition Electrochemical impedance spectroscopy(EIS) Metal-organic framework Organic coatings 

分 类 号：V252.2[一般工业技术—材料科学与工程] TG174.42[航空宇航科学与技术—航空宇航制造工程]