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Developing waterborne epoxy (WEP) coatings with excellent corrosion resistance and tribological properties is a key aspect to solve the damage of Q235 steel. In this work, perylene bisimide (PBI) derivatives dispersion graphene (GR) were prepared by a π-π stacking, the highly orientated PBI 0.5% /GR 0.5% /WEP coating will be prepared by the rotating coating method. Especially, the impedance value reached about 10 9 Ω·cm 2 when the PBI and GR ratio is 1:1. The impedance value of PBI 0.5% /GR 0.5% /WEP coating increased by 3 orders of magnitude compared with that of pure WEP coating (10 6 Ω·cm 2 ). Additionally, the coefficient of friction of the coatings was 0.33; compared with that of WEP, the coefficient of friction decreased by 48%, and the wear resistance increased by 87.6%. The results show that the PBI 0.5% /GR 0.5% /WEP coatings exhibited excellent corrosion resistance and wear resistance properties due to the good dispersion and high orientation of PBI/GR in WEP. It is anticipated that our current work would guide the ongoing efforts to develop a more efficient method to overcome the poor dispersion of GR in waterborne epoxy resin and provide a green coating with excellent corrosion resistance and wear resistance properties.

Improving Corrosion Protection and Friction Resistance of Q235 Steel by Combining Noncovalent Action and Rotating Coating Method