Effect of GO‐TiO2 to waterborne epoxy resin on microstructure and anti‐corrosion properties

Abstract To enhance the anti‐corrosion of the waterborne epoxy resin coating, we filled GO‐TiO 2 into the coating with ultrasound and stirring method. Results show that coatings rendered optimum properties at GO‐TiO 2 content of 0.4 wt% with a hardness of 3H and rate of thermal weight loss reduce 8.3 wt%. After immersion for 30 days, coating exhibited water absorption ratio of merely 11.25% and open circuit potential of −0.871 V. After 1000 h of scratch‐neutral salt spray test, no obvious signs of corrosion were observed on surface. Moreover, Electrochemical results demonstrated that maximum impedance modulus of 0.4GO‐TiO 2 coating was 2.18 × 10 6 Ω cm 2 , corresponding to superior corrosion resistance. What is more, anticorrosion mechanism was discussed. In conclusion, Filling GO‐TiO 2 improved mechanical properties, thermal stability and corrosion resistance of waterborne epoxy resin coatings.