Alumina nanoparticles-reinforced graphene-containing waterborne polyurethane coating for enhancing corrosion and wear resistance
Xueting Chang, Xiaoqiu Chen, Qingyun Zhang, Yanhua Lei, Dongsheng Wang, Jinyang Li, Shibin Sun
Abstract
In this paper, aluminum oxide (Al2O3) nanoparticles-reinforced graphene (G)-containing waterborne polyurethane (WPU) coatings were prepared on the EH40 steel substrate. Wear and corrosion resistance of the Al2O3/G/WPU coatings with different Al2O3 contents were investigated by wear test, electrochemical impedance spectroscopy, and salt spray test. Results showed that the Al2O3/G/WPU coatings exhibited highly enhanced wear and corrosion resistance in comparison with the G/WPU coatings. The Al2O3/G/WPU coating with 3 wt.% Al2O3 was found to exhibit the best performance in terms of friction coefficient, wear volume, corrosion current, and impedance. The Al2O3/G/WPU coatings with promising wear and corrosion resistance may find widespread potential applications in polar icebreaking ship steels.