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Performance of anticorrosive coatings containing tripolyphosphates in aggressive environments / M. Deyá in Industrial & engineering chemistry research, Vol. 47 N°18 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 7038–7047 Titre : Performance of anticorrosive coatings containing tripolyphosphates in aggressive environments Type de document : texte imprimé Auteurs : M. Deyá, Auteur ; A. R. Di Sarli, Auteur ; B. del Amo, Auteur Année de publication : 2008 Article en page(s) : p. 7038–7047 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Calcium  tripolyphosphate  Zinc  tripolyphosphate  Aggressive  environments Résumé : The objective of this research was to study the efficiency of calcium tripolyphosphate and zinc tripolyphosphate as anticorrosive pigments for paints in aggressive environments. Alkyd and epoxy paints, of the solvent-borne type, containing 30% by volume (v/v) of the pigment, were formulated. The pigment volume concentration/critical pigment volume concentration (PVC/CPVC) ratio was fixed at 0.8. In a second stage, water-borne paints containing 30% v/v of both tripolyphosphates and different PVC values (20 and 25%) were also formulated. Finally, standardized accelerated (salt spray and humidity chamber exposure) and electrochemical impedance spectroscopy (EIS) tests were used to assess the protective performance of the coatings. Analysis and interpretation of the experimental data show that both, calcium and zinc tripolyphosphates, inhibit corrosion of painted steel panels exposed to aggressive environments. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071544d [article] Performance of anticorrosive coatings containing tripolyphosphates in aggressive environments [texte imprimé] / M. Deyá, Auteur ; A. R. Di Sarli, Auteur ; B. del Amo, Auteur . - 2008 . - p. 7038–7047. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 7038–7047 Mots-clés : Calcium  tripolyphosphate  Zinc  tripolyphosphate  Aggressive  environments Résumé : The objective of this research was to study the efficiency of calcium tripolyphosphate and zinc tripolyphosphate as anticorrosive pigments for paints in aggressive environments. Alkyd and epoxy paints, of the solvent-borne type, containing 30% by volume (v/v) of the pigment, were formulated. The pigment volume concentration/critical pigment volume concentration (PVC/CPVC) ratio was fixed at 0.8. In a second stage, water-borne paints containing 30% v/v of both tripolyphosphates and different PVC values (20 and 25%) were also formulated. Finally, standardized accelerated (salt spray and humidity chamber exposure) and electrochemical impedance spectroscopy (EIS) tests were used to assess the protective performance of the coatings. Analysis and interpretation of the experimental data show that both, calcium and zinc tripolyphosphates, inhibit corrosion of painted steel panels exposed to aggressive environments. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071544d