Electrochemical synthesis of Polypyrrole –TiO2 nanocomposites on mild steel and Corrosion study

In recent years, electronically conducting polymers (CPS) have attracted considerable attention because of their unusual electronic properties. Of all known CPS, polypyrrole (PPy) is the most frequently used in commercial applications, such as batteries,sensors and corrosion protection, because of the fairly good environmental stability and the possibility of forming homopolymers or composites with optimal chemical and physical properties[1,3]. Nanoscale titania is one of the most investigated oxide materials recently in environmental cleanup, photocatalysts and solar cells owing to its photocatalytic activity [1]. Many nano composite coatings were reported to exhibit better performance in comparison with the traditional coatings. In recent years, nano TiO2 and nano ZnO have been paid much attention since their application improved the optical property and endowed other special function to coatings. It is reasonable to suppose that the diffusion behaviour of corrosion specimens in the nanocomposite coatings may be much different from that in the conventional coatings [2].