Evaluación de un recubrimiento anticorrosivo a base de poliestireno expandido reciclado.

Abstract

Development of anticorrosive coatings currently seeks the reuse of large quantities of discarded polymers, among which polystyrene stands out. The objective of this research was to evaluate an anticorrosive coating formulated based on recycled expanded polystyrene. Two standard formulations were developed with expanded polystyrene recycled as resin, D-limonene as solvent, TiO2 pigment charge, ZnO anticorrosive agent and cobalt octoate as a drying agent. Their physical, chemical and Theological properties were evaluated in reference to the Ecuadorian Technical Norm NTE INEN 1045 "Anticorrosive paints. Glossy alkyd enamel. Requirements. " The results show that the formulation 2 gives better results depending on its a time of drying to the touch (63,840 min), viscosity (715,80 cP), percentage of adherence (96,00 %), cleaning in glass and percentage of solids (39,50 %). Additionally, the corrosion resistance of the obtained coating versus a commercial coating was compared by exposure, in the saline environment of Las Palmas Beach in the city of Esmeraldas, plates made of carbon steel, 304L stainless steel and black tol, all treated with both coatings and tested by weight loss technique. Corrosion rate in the samples where the polystyrene coating was applied, in thousandths of inches per year (mpy), were 0.859 for the black tol, 0.259 for carbon steel and 0.064 for 304L stainless steel. Also ASTM-610 standard standardized images was applied. Potential of the recycled polymer as a resin for anticorrosive coating was confirmed by the results of this investigation.