Protection of steel with only one coat

B DEL AMO; A. R. DI SARLI; J. LECOT; J. J. CAPRARI

Surface Coatings International Part B: Coatings International

Oil & Colour Chemists' Association

Año: 2003 vol. 86 p. 143 - 148

1476-4865

This is a study of the anticorrosive properties provided by the zinc molybdenum phosphate pigment added to water-borne paint films applied on steel substrates as unique protective coatings. Standardised and electrochemical tests were used to evaluate the paint performance as a function of the exposure time. From experimental results it was concluded: Zinc molybdenum phosphate was an effective anticorrosive pigment for water-borne primers. Only one paint using this pigment provided effective protection against weather conditions. Formulated water-borne epoxy paints gave similar anticorrosive protection to conventional two-component solvent-based paints. When properties such as anticorrosive, chalking, gloss and yellowing resistance were important, a paint with pigment volume concentration (PVC) 27% and 10% (v/v) of zinc molybdenum phosphate could be considered as an interesting possibility.