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Título del libro: European Corrosion Congress, Eurocorr 2016
Título del capítulo: Electrochemical evaluation of natural and organic inhibitors in the tarnish of silver for conservation and restoration

Autores UNAM:
ARACELI ESPINOZA VAZQUEZ; RACHEL MATA ESSAYAG; FRANCISCO JAVIER RODRIGUEZ GOMEZ;
Autores externos:

Idioma:
Inglés
Año de publicación:
2016
Palabras clave:

Conservation and restoration; Electrochemical techniques; Inhibitors; Silver; Tarnish


Resumen:

The corrosion inhibition activity in (NK4)2S + NaCl of 1,2,4-triazole and perezone in silver alloys 0.925, 0.800 and 0.720 was demonstrated by means of the techniques of Electrochemical Impedance Spectroscopy and Polarization Curves, in a concentration sweep from 0 to 200 ppm. It was found that the efficiency of 1,2,4-triazole was reached as corrosion inhibitors at 20 ppm in (NH4)2S + NaCl, at 98.20%, 90.22% and 91.88%, for Ag 0.925, 0.800 and 0.720, respectively and in regards to perezone, it was reached at 98.25%, 90. 50% and 93.47% for Ag 0.925, 0.800 and 0.720, respectively. It was confirmed that the adsorption process of the inhibitors was physisorption, by means of thermodynamic analysis using the Langmuir adsorption model. © 2016 Cefracor. All rights reserved.


Entidades citadas de la UNAM: