Resistance of Anticorrosive Coatings on carbon steel in nine cities of Ecuador

Abstract

The present study shows the level of protection of various anticorrosive coatings (Magnelis, Galvalume, Zinc and acrylic) applied on carbon steel through tests performed in field and laboratory. Field tests were developed during one year in nine cities of Ecuador (South America): Quito (two urban stations), Guayaquil (one station marine and another urban-marine), Santo Domingo (subtropical station), Manta (urban-marine), Portoviejo (urban), Esmeraldas (industrial-marine), Machala (urban-marine), Cuenca (industrial) and Latacunga (urban). The laboratory tests were performed in a salt spray test chamber and in a xenon arc testing machine for up to 500 hours. Field tests allowed to determine the corrosive category of these cities, with Esmeraldas and Cuenca presenting the most aggressive environments. The results obtained in this first year of tests with the coatings used allow us to notice a behavior that depends on the test station, presenting particularly remarkable differences in marine, industrial, mixed locations and those with high relative humidity.