INVESTIGADORES
VAZQUEZ marcela Vivian
congresos y reuniones científicas
Título:
Correlation between electrical properties of the passive film on carbon steel and inhibition efficiency by phosphate and nitrite ions
Autor/es:
M. A. FRONTINI; M. VAZQUEZ; M. VALCARCE
Lugar:
National Harbour
Reunión:
Encuentro; 232nd ECS Meeting; 2017
Institución organizadora:
The Electrochemical Society
Resumen:
Trabajo publicado en ECS Transactions, 80 (10) 621-633 (2017)The electronic properties of passive films grown at open circuitpotential for 24 h and 7 days in pore simulating solutions arecorrelated to the inhibiting effect of nitrite and phosphate ions inchloride-rich alkaline solutions. Electrochemical impedance andMott-Schottky plots were used to investigate the electronicproperties of the films grown. Changes in composition wereanalyzed by X-ray photoelectron spectroscopy.Both anions are excellent inhibitors. However, the donor density(ND) decreases when nitrites are incorporated and remains constantwhen phosphates are added. ND increases with ageing time. Thesedifferences are interpreted in terms of the composition of eachsurface layer.
