CIDEPINT   05376
CENTRO DE INVESTIGACIONES EN TECNOLOGIA DE PINTURAS
Unidad Ejecutora - UE
artículos
Título:
Performance of Anticorrosive Coatings Containing Tripyphosphates in Aggresive Environments
Autor/es:
DEYÁ, M.C., DI SARLIA.R. ,DEL AMO B., ROMAGNOLI R.
Revista:
Industry and Engineering Chemistry Research
Editorial:
ACS publications
Referencias:
Lugar: Washington; Año: 2008 vol. 47 p. 7038 - 7047
Resumen:
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 solventborne 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) electrochemical impedance spectroscopy (EIS) tests were used to assess the protective performance of 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.