Facile preparation of soluble poly(2-aminothiazole)-based composite coating for enhanced corrosion protection in 3.5% NaCl solution

Conducting polymer-based coating is the prospective alternative in consideration of environment-friendly coatings for corrosion protection of metallic substrate. Minimally-researched poly(2-aminothiazole) (PAT) with well-dispersion and good processability was synthesized successfully via radical polymerization and explored to prepare novel PAT/epoxy composite coatings on Q235 steel. The anticorrosive performance of PAT-based composite coatings was evaluated by electrochemical impedance spectroscopy, potentiodynamic polarization technique and scanning vibrating electrode technique in 3.5 wt % NaCl solution. The corrosion protective mechanism of poly(2-aminothiazole) was proved by the identification of rust layer beneath the composite coating.