THE INFLUENCE OF ZINC OXIDE ON THE ANTICORROSIVE BEHAVIOUR OF ECO - FRIENDLY PAINTS

Zinc phosphate and related compounds have achieved wide application as suitable replacements for toxic and pollutant zinc Chromates and lead oxides which were employed as anticorrosive pigments for paints. The behaviour of inorganic phosphates and tripolyphosphates may be improved by a suitable selection of complementary pigments. The objective of this research work was to study the effect of substituting talc by zinc oxide in the pigment formula of anticorrosive alkyd paints. Different inorganic phosphates and tripolyphosphates were selected as active pigments. Paints with a pigment volume concentration/critical pigment volume concentration (PVC/CPVC) equal to 0.8 were formulated and their anticorrosive efficiency tested through accelerated and electrochemical tests. Results showed that the incorporation of zinc oxide to the pigment formula improved corrosion resistance of painted steel, especially in the case of tripolyphosphates.Fil: Deya, Marta Cecilia. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; ArgentinaFil: Romagnoli, Roberto. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; ArgentinaFil: del Amo, Delia Beatriz. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; Argentin