Abstract
The electrical properties of conducting polymers make them interesting materials to be used in a large number of technological applications. In recent years, an important effect on the anticorrosive properties of the conductive polymer was observed when inorganic particles such as nano-sized TiO2 are incorporated in the conductive matrix. In the present study, polypyrrole films were synthesized in the presence of TiO2 nanoparticles. A study of the electropolymerization conditions, thickness of the formed films and the effect of incorporation of TiO2 nanoparticles on the structure of the polymer matrix by Raman spectroscopy was performed. These results show that it is possible to obtain the adherent coatings, with thicknesses between 3-4 µm. However, the presence of TiO2 nanoparticles in the polymeric matrix influences the corrosion resistance of the polypirrole coatings, destabilizing the natural passive capacity on the surface of AISI 304 stainless steel.
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