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

Abstract

The objective of the present investigation was to evaluate an anticorrosive coating based on recycled expanded polystyrene. It proposed an experimental design that consisted initially with the development of two formulations which were obtained according to different quantities of recycled expanded polystyrene, D-Limonene, titanium dioxide, zinc oxide and octoato of cobalt as a drying agent. At the end of the preparation of the formulations evaluated their physical, chemical and rheological properties, whose results obtained were within the permissible limits established by the Ecuadorian Technical Standard NTE INEN 1045 “Anticorrosive paints, Glossy alkyd enamel. Requirements ", touch drying time 63, 84 min, viscosity of 715, 8 cP, adhesion percentage of 96%, and the solids percentage of solids 39, 5%. After that, it measured the corrosion resistance of the obtained coating and a commercial coating on carbon steel plates, stainless steel 304L and “tol negro”, using the weight loss technique by exposure to the saline environment from Las Palmas Beach located in the city of Esmeraldas. The final results of the corrosion rate measured in mils per year (mpy) were: “tol negro” 0,859; carbon steel 0,259; and 0,064 of stainless steel 304L. It is concluded that after performing the visual inspection of the glass cylinders based on the standard ADT D-610 through the use of standardized images depending on the degree of oxides formed on the surface, determined that the commercial coating has a lower percentage of surface oxides compared to the formulation 2, due to the commercial coating has better composition.