Abstract
The paper deals with studying the anticorrosive properties of condensed phosphates and polyphosphates in the coatings. The pigments contain cation in the most cases as aluminium in a combination with zinc, strontium, calcium or a combination with all the cations. The investigated anticorrosive pigments differ in water solubility, inhibition efficiencies of their aqueous extracts and also the efficiencies in the coatings protecting steel substrate to corrosion. Two types of condensed anticorrosive pigments (polyphosphates and polyphosphosilicates) were compared. The anticorrosion properties of polyphosphosilicates are inferior to those of polyphosphates. The high anticorrosion efficiency was found at a comparative pigment, represented by zinc phosphosilicate.
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