Síntese de revestimento anticorrosivo baseado em polianilina aplicado ao aço carbono

Abstract

The corrosive phenomena has been shown as a major difficulty in daily modern life. Its occurrence very often leads to issues such as industrial unscheduled stoppages and compromising the efficiency of several equipments and structures. As a contribution to one more alternative solution of corrosion combat, the present project seek to demonstrate that it is possible to develop a composite able to reduce the harmful effects. This material will be constituted by polyaniline, additive and zinc nanoparticles, all dispersed in unsaturated polyester solution diluted with 60% styrene, constituting what we call Primary Coating .This coating will be applied over the surface of steel SAE 1020. The electrochemical evaluation of coating efficiency was made by means of open circuit potential test (OCP) in resting conditions. Preliminary experiments showed that the steady state is reached in the near threehour period. The tests based on the polarization curves and other technique will allow the evaluation of the coatings performance, through the monitoring of the spectra evolution in function of immersion time of the samples in 5% sodium chloride solution. The results showed that the synthesized coating could be a very efficient material.