ABSTRACT This study prepared polyamide‐imide/polytetrafluoroethylene/flake aluminum (PAI/PTFE/Al) composite coatings and investigated their corrosion and tribocorrosion resistance in artificial seawater, 0.01 mol/L NaOH, and 0.01 mol/L HCl media. The results showed that the medium significantly influenced coating performance. The coating demonstrated excellent corrosion resistance after 720 h of immersion in both HCl medium and artificial seawater, maintaining low‐frequency impedance modulus (|