Preparation and Corrosion Resistance of Polyaniline/Epoxy Composite Coating

Polyaniline nanofibers (PAni) with high conductivity of 1.299 S·cm were synthesized by rapid mixed method. The results of electrochemical impedance spectroscopy (EIS) showed that the polyaniline/epoxy (P/E) composite coating containing 0.4% to 0.6% PAni had good corrosion protection performance on A3 steel in NaCl (3.5%) solution. Impedance of the coating was more than 109 Ω·cm2 after the electrode was immersed for 2400 h.