Corrosion Protection Performance of Nanoclay-Polyester Nanocomposite Coatings


Journal: Vol.9, No.4, autumn 2016 - Article 2   Pages :  223 Until 232



Article Code:
PCCC-2016-06-15-329

Authors:
A. Golgoon: Tarbiat modares university - Department of Materials Engineering
M. Aliofkhazraei: Tarbiat Modares University - Department of Materials Engineering
M. Toorani: Tarbiat modares university - Department of Materials Engineering
A. R. Sabour Rouhaghdam: Tarbiat modares university - Department of Materials Engineering


Article's abstract:

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.


Keywords:
EIS, Electrostatic, Nanocomposite, Nanoclay, Immersion test.

References:
[1] B. Ramezanzadeh, M. M. Attar, An evaluation of the corrosion resistance and adhesion properties of an epoxy-nanocomposite on a hot-dip galvanized steel (HDG) treated by different kinds of conversion coatings, Surf Coatings Technol, vol. 205, no. 19, pp. 4649–4657, 2011. [2] M. Erbil, M. Özcan, EIS study of the effect of high levels of SO 2 on the corrosion of polyester-coated galvanised steel at different relative humidities, vol. 44, pp. 279–285, 2002. [3] K. Dastoori, B. Makin, and J. Telford, Measurements of thickness and adhesive properties of electrostatic powder coatings for standard and modified powder coating guns, J Electrostat, vol. 51, pp. 545–551, 2001. [4] R. Naderi, M. M. Attar, and M. H. Moayed, EIS examination of mill scale on mild steel with polyester–epoxy powder coating, Prog Org Coatings, vol. 50, no. 3, pp. 162–165, 2004. [5] X. Shi, T. A. Nguyen, Z. Suo, Y. Liu, and R. Avci, Effect of nanoparticles on the anticorrosion and mechanical properties of epoxy coating, Surf Coatings Technol, vol. 204, no. 3, pp. 237–245, 2009. [6] M. G. Hosseini, M. Jafari, and R. Najjar, Surface


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