CORROSION RESISTANCE OF STEEL/ZINC WITH SILICATE NANOPARTICLES/ POLYURETHANE PAINT SYSTEMS IN NaCl SOLUTION

CÉLIA R. TOMACHUK; CECILIA INES ELSNER; ALEJANDRO. R. DI SARLI

Journal of Materials Science and Engineering A

Davis Publishing Company

Lugar: Illinois; Año: 2012 vol. 2 p. 693 - 711

2161-6213

Surface characteristics and corrosion behaviour of bare electrogalvanized steel coated with polymer/nano-silicate particles added to the electrogalvanizing bath were studied by scanning electron microscopy (SEM), energy dispersive spectrometer (EDXS) and electrochemical impedance spectroscopy (EIS). After applying a barrier polyurethane paint, the paint hardness, porosity, flexibility, colour, gloss, blistering and rusting degrees, and anticorrosive protective properties in 0.05 mol·L-1 NaCl solution were also evaluated. The results correlated well and, being demonstrative of the very slow deterioration rate of the immersed coated electrogalvanized steel, they enabled to assume that if a chemically analogous but thicker coating system was applied; it could be an acceptable alternative in real service conditions.