Evaluation of PPy-TiO2 composite coatings for corrosion protection of mild steel

The semiconducting polymer and inorganic metal oxide composites composed of pol\ pyrrole /titanium dioxide (PPy/TiO
₂
) were synthesized by sol-gel techniques. The products were characterized by FT-IR, Scanning electron microscopy (SEM), thermo gravimetric differential thermal analysis (TG-DTA) and XRD (X-ray diffraction) techniques. The corrosion performance of polypyrrole-titanium oxide composite incorporated epoxy-polyamide coatings on mild steel was evaluated by salt spray test and electrochemical impedance spectroscopy (ElS).The results showed that 2% PPy-TiO
₂
composite incorporated epoxy-polyamide coating exhibits better corrosion protection than other systems. The glass transition temperature of PPY-TiO
₂
composite was found to be 353Kand the decomposition temperature was noticed at 573 Kfrom TG- DTA studies.