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

ABSTRACT: 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 10⁹ Ω·cm² 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 (10⁶ Ω·cm²). 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.

SUBMITTER: Lao L 

PROVIDER: S-EPMC7992059 | biostudies-literature |

REPOSITORIES: biostudies-literature