Uso del aceite pirolítico de mezclas de poliestireno y polipropileno para la elaboración de un recubrimiento anticorrosivo en base de poliestireno expandido reciclado

Abstract

The objective of this research was to use the pyrolytic oil of polystyrene and polypropylene mixtures for the elaboration of an anticorrosive coating based on recycled expanded polystyrene; different formulations of the coating were developed, with a fixed amount of additive, then the obtained samples and a commercial coating were applied on steel, copper for greater efficiency in the control of corrosion in relation to the percentage of corroded surface. The optimum formulation was developed, with 200 ml of Pyrolytic Oil as solvent, 13.5 grams of zinc oxide as protector against the formation of rust in the film, 8.7 grams of titanium dioxide as pigment. The results of the physicochemical and rheological characterization of the coating yielded the following average values. Viscosity 2893cP. Information on 71.66% adhesion, 2 hours (120 minutes) drying time, 38.5% solids. Comparisons according to ASTM D610 "Standard Test Methods for Evaluating Rust Degree on Painted Steel Surfaces, the physical appearance and good properties of the base metal were visually inspected by checking the surface under the coating. Formulation A was found to exhibit lower corrosion resistance compared to commercially available coatings. Formulation A meets specific criteria methods such as viscosity (NTE INEN 1013), drying time (ASTM D640), and solids content (NTE INEN 1024). It is recommended to use the salt spray chamber test, in addition to more advanced techniques such as scanning electron microscopy, in order to have more data, information and tools when analyzing the results on the composition of anticorrosive coatings.