STUDY ON EPOXY RESIN/MULTI-WALLED CARBON NANOTUBES CONDUCTIVE COATING ON AZ31 MAGNESIUM ALLOY AFTER MICRO-ARC OXIDATION

C. Zhang, C. Wang, B. Jiang and R. G. Song
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C. Zhang: School of Materials Science and Engineering, Changzhou University, Changzhou 213164, P. R. China
C. Wang: School of Materials Science and Engineering, Changzhou University, Changzhou 213164, P. R. China
B. Jiang: School of Materials Science and Engineering, Changzhou University, Changzhou 213164, P. R. China
R. G. Song: School of Materials Science and Engineering, Changzhou University, Changzhou 213164, P. R. China

Surface Review and Letters (SRL), 2024, vol. 31, issue 10, 1-8

Abstract: After micro-arc oxidation, the surface properties of AZ31 magnesium alloy have been improved. However, micro-arc oxidation treatment leads to high insulation, which limits its application in electronic devices. To increase conductivity, a conductive coating was developed by adding multi-walled carbon nanotubes (MWCNTs) to the epoxy resin. The microstructure and performance of the coating were tested by SEM, thermogravimetric analyzer, four-probe conductivity meter, high-temperature friction and wear tester, and electrochemical workstation. The results indicate that the optimal conductivity with a resistivity of 303Ω⋅m is obtained when the MWCNT content is at 4wt%. In addition, MWCNTs are filled with a network structure of epoxy resin, which increases the density of the coating and enhances their wear and corrosion resistance.

Keywords: AZ31 magnesium alloy; micro-arc oxide conductive modification; MWCNTs; wear resistance; corrosion resistance (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1142/S0218625X24500811

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