The semi conducting polymer and inorganic metal oxide composites composed of polypyrrole /titanium dioxide (PPy/TiO₂) were synthesized by sol-gel techniques. The products were characterized by FT-IR, Scanning electron microscopy (SEM), thermo gravimetry, differential thermal analysis (TG-DTA) and XRD (X-ray diffraction) techniques. The corrosion performance of polypyrrole-titanium dioxide composite incorporated epoxy-polyamide coatings on mild steel was evaluated by salt spray test and electrochemical impedance spectroscopy (EIS). The results showed that 2% PPy-TiO₂ composite incorporated epoxy-polyamide coating exhibits better corrosion protection than other systems. The glass transition and decomposition temperature of PPy- TiO₂ composites were found.

Key words: Sol-gel technique, TG-DTA, XRD, Salt spray testing, EIS