Corrosion Protection Performance of Nanoclay-Polyester Nanocomposite Coatings

In this paper, polymer-based nanocomposites powder were applied on the surface of plain carbon steel by electrostatic device and then were cured by microwave. The effect of adding nanoparticles on the corrosion resistance properties of the coatings was investigated by Electrochemical Impedance Spectroscopy and immersion test in 3.5 NaCl solution. Coatings structure and morphology of nanoparticles were investigated by scanning electron microscopy and transmission electron microscopy. The results of Electrochemical Impedance Spectroscopy and immersion test show that the corrosion resistance of the coating is increased significantly more than 10 time, by adding nanoclay because of barrier properties of nanoparticles. Also Embedding Nanoparticles in polyester coating fabricated a denser coatings, more uniform and less pores in comparison with the pure polyester coatings. Surface roughness of coated samples were showed more roughness for nanocomposite coatings.