Journal of Applied Electrochemistry, Vol.29, No.12, 1401-1407, 1999
Performance of zinc molybdenum phosphate in anticorrosive paints by accelerated and electrochemical tests
This work studied the anticorrosive behaviour of micronized 'zinc molybdenum phosphate' (zinc phosphate modified with zinc molybdate). It was proposed to evaluate its efficiency in solvent borne paints with 30 and 15% of the pigment by volume and a pigment volume concentration/critical pigment volume concentration ratio (PVC/CPVC) of 0.8. The behaviour of paints formulated with different binders such as epoxy, chlorinated rubber, vinyl and alkyd resins, was assessed by accelerated (salt spray cabinet and accelerated weathering) and electrochemical tests. Epoxy and chlorinated rubber paints showed the best anticorrosive performance. The inhibitive action of `zinc molybdenum phosphate' was confirmed. Good correlation was obtained between salt spray and electrochemical tests.