Studying the Anticorrosion Performance and Adhesion properties of an Epoxy/Polyamide Coating loaded with different mixtures of Zinc Aluminum Phosphate (ZPA) and Strontium Aluminum Polyphosphate (SAPP)

Organic coatings have been widely used to protect metallic substrates from corrosion in exposure with aggressive environments. Anticorrosive pigments are used in the coatingsformulation in order to improve their anticorrosion properties. Inorganic pigments that release corrosion inhibitingsubstances are usually added to the formulation of these coatings to achieve a reliable performance. Zinc is an example of these kinds of pigments. However it has low corrosionefficiency, due to its low solubility in water. ZPA and SAPP (the second and third generations of ZP pigment) are theanticorrosive pigments which have greater solubility compared with ZP [1-3]. Also, the corrosion inhibition of the coatings was studied in presence of ZPA and SAPP pigments[4]. This work aims to investigate the antagonism and/or synergism effects of the mixtures of these pigments on thecoating performance when pigment volume concentration are changed.