Electrochemical, chemical and barrier action of zinc dust/anticorrosive pigments containing coatings

This work deals with the study of anticorrosive efficiency of coatings containing a combination of zinc dust and non-metallic pigments. Eight non-metallic anticorrosive pigments combined with zinc dust VM 4P16 were used. For each combination of pigments were prepared three or four types of epoxyester coatings with different pigment volume concentration. All coatings were pigmented to a degree of Q=65%. The effectiveness of these systems was rated according to the resistance of the coatings exposed to 5% salt spray in a salt-spray cabinet with NaCl solution and humidity condensation and to SO2 atmosphere in a humidity cabinet. The obtained results were analyzed by subjective evaluation methods.