Investigation of anti-corrosive properties of poly(aniline-co-2-pyridylamine-co-2,3-xylidine) and its nanocomposite poly(aniline-co-2-pyridylamine-co-2,3-xylidine)/ZnO on mild steel in 0.1Â M HCl

Potentiodynamic polarization curves of (a) uncoated steel, (b) poly(AN-co-PA-co-XY)/ZnO, (c) poly(AN-co-PA-co-XY), (d) polyaniline/ZnO, (e) poly(2,3-xylidine)/ZnO and (f) poly(2-pyridylamine)/ZnO coated steel.