Document Type: Research Paper
Department of Chemistry, Payame Noor University, Tehran 19395-4697, Iran
payame noor university
In this paper, decorated graphene oxide with CeO2 nanoparticles was prepared and used as anticorrosive pigments in epoxy nanocomposite coatings. The synthesized nanoparticle was characterized by FTIR, XRD, SEM and EDX analysis. Decorated graphene oxide with CeO2 nanoparticles was dispersed in epoxy resin by using sonication method. The optimum nanoparticle content in epoxy resin was studied by differential scanning calorimetry. The anticorrosive properties of these coatings were investigated by electrochemical impedance spectroscopy method and polarization in corrosive solution. Impedance parameters showed a decrease in coating resistance over immersion time. Results indicated that epoxy coatings containing nano particles could significantly increase the corrosion resistance of composite coatings compared to those of pure epoxy and the highest value was obtained for 1% nanocomposite coatings after 270 days immersion. Pull off adhesion test showed that the highest value of adhesion was related to coating containing 1% nanoparticles.