Development of anti-corrosive coatings for non-alloyed steels subjected to different real use conditions

Abstract

Abstract In this study, different corrosion inhibitors were synthesized: a Fe-Cr ceramic nanopigment, a hybrid polymeric/ZnO nanocomposite coating, and a multi-functional hybrid coating containing silica nanoparticles. As the standardized methods for corrosion evaluation do not simulate real use conditions, the effectiveness of the coatings was tested by applying them over carbon steel specimens and subjecting them to real corrosive environments: chloride-rich atmosphere, marine atmosphere, and an atmosphere exempt of specific contaminants for 9 months to study the long-term corrosion resistance. The inhibition power achieved was determined by X-ray diffraction, scanning electron microscope with energy dispersive X-ray microanalysis, and weight difference.