SYNTHESIS AND CORROSION PROTECTION BEHAVIOR OF EPOXYTiO۲-MICACEOUS IRON OXIDE NANO - COMPOSITE COATING ON St-۳۷

The micro layers micaceous iron oxide and nano-TiO ۲ were incorporated into the epoxy resin by mechanical mixing and sonication process. Optical micrographs showed that the number and diameter size of nanoparticle agglomerates were decreased by sonication. The structure and composition of the nanocomposite was determined using transmission electron microscopy which showed the presence of dispersed nano-TiO ۲ in the polymer matrix. The anticorrosive properties of the synthesized nano-composites coating were investigated using salt spray, electrochemical impedance spectroscopy and polarization measurement. The EIS results showed that coating resistance increased by addition of micaceous iron oxide micro layers and nano-TiO ۲ particles to the epoxy coatings. It was observed that higher corrosion protection of nanocomposite coatings obtained by the addition of ۳ %wt micaceous iron oxide and ۴%wt nano-TiO ۲ into epoxy resin.

Keywords:

Corrosion , Nano-composite coatings , Impedance , Micaceous iron oxide