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Mechanical, tribological and anti-corrosive properties of polyaniline/graphene coated Mg-9Li-7Al-1Sn and Mg-9Li-5Al-3Sn-1Zn alloys

查看全文 作　　者：Rita [1,2]Maurya;Abdul Rahim [1,3]Siddiqui;Prvan Kumar [1]Katiyar;Kantesh [1]Balani 高影响力作者 机构地区：[1]Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India;[2]Centre for Material Science & Engineering, National Institute of Technology Hamirpur, Hamirpur, 177005, India;[3]China-Canada Institute for Advanced Surface & Interface Science and Engineering, Jiangsu University of Technology, Changzhou, 213001, China高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2019年第35卷第8期,共12页高影响力期刊 基　　金：funding from Space Technology Cell (IIT Kanpur, and Indian Space Research Organisation) 摘　　要：The mechanical,tribological and corrosion protection offered to Mg-9Li-7Al-1Sn and Mg-9Li-5Al-3Sn-1Zn alloys by the epoxy coating containing polyaniline/graphene(PANI/Gr)pigments is undertaken in the current work.PANI/Gr containing coatings were observed to be strongly adherent with a higher scratch hardness(Hs)and plowing hardness(Hp),i.e.Hsof 0.43 GPa,and Hpof 0.61 GPa,respectively when compared to that of neat epoxy coating(Hsof 0.17 GPa,and Hpof 0.40 GPa,respectively).Due to their higher Hsand Hpvalues,PANI/Gr based coatings displayed an enhanced wear resistance(Wear volume,Wv=4.53×10^-3 m^3)than that of neat epoxy coating(Wv=5.15×10^-3 m^3).The corrosion protection efficiency in corrosive environment of 3.5 wt%NaCl solution was obtained to be>99% for PANI/Gr containing coatings when compared to that of neat epoxy coating.The charge-transfer resistance(R(ct))of the PANI/Gr containing coatings were estimated to be>10^6 cm^2,which indicates their highly protective nature when compared to that of neat epoxy coating(R(ct)10^5 Ω cm^2).Hence,PANI/Gr containing coatings can be potentially used for wear resistance and corrosion protection applications in marine environments. 关 键 词：MG-LI ALLOYS Scratch HARDNESS PLOWING HARDNESS Wear RESISTANCE Corrosion protection efficiency Charge transfer RESISTANCE
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