Comparison of the corrosion behavior of AM60 Mg alloy with and without self-healing coating in atmospheric environment

查看全文 作　　者：Yingwei [1]Song;Dan [1,2]Liu;Weineng [3]Tang;Kaihui [1]Dong;Dayong [1]Shan;En-Hou [1]Han

机构地区：[1]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]Baosteel Central Research Institute(R&D Center),China Baowu Group,655 Fujin Road,Shanghai 201900,China

出　　处：《Journal of Magnesium and Alloys》索引2021年第9卷第4期,共14页

基　　金：This work was supported by the National Natural Science Foundation of China(No.51671199);the National Key Research and Development Program of China(No.2016 YFB0301105). 摘　　要：Coatings on the surface of Mg alloys are inevitably damaged during their practical applications,and corrosion can easily initiate from the damaged areas to accelerate the failure of Mg parts.A dual self-healing coating has already been developed to solve this problem in our previous work.Considering the practical application of this coating,it is necessary to investigate its service behavior in atmospheric environment.Thus,the corrosion behavior of AM60 Mg substrate with and without the self-healing coating was compared in Shenyang industrial atmospheric environment.The results show that the enrichment of sediments and rainwater on the scratch areas can accelerate the corrosion of the exposed Mg substrate.The inhibitors can be released from the damaged coating to inhibit corrosion.The dual self-healing coating shows better inhibition ability to narrow scratches due to the higher inhibitor concentration and less resumption.Also,the coating with wide scratches displays enough inhibition ability as well.The dual self-healing coating is a good alternative for Mg alloy parts in the practical applications. 关键词：Self-healing coating Micro-arc oxidation(mao)film Atmospheric corrosion Mg alloy Inhibitor Sediments

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Comparison of the corrosion behavior of AM60 Mg alloy with and without self-healing coating in atmospheric environment

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