Effect of the Unsaturation of the Hydrocarbon Chain of Fatty-Amides on the Corrosion of Carbon Steel Using EIS and Real-Time Corrosion MeasurementReportar como inadecuado




Effect of the Unsaturation of the Hydrocarbon Chain of Fatty-Amides on the Corrosion of Carbon Steel Using EIS and Real-Time Corrosion Measurement - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Journal of Spectroscopy - Volume 2015 2015, Article ID 184140, 13 pages -

Research Article

CIICAp, Universidad Autonoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, Mexico

Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Avenida Universidad s-n, 62210 Cuernavaca, MOR, Mexico

Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autonoma de Mexico, Avenida Guelatao 66, 09230 Mexico City, DF, Mexico

Corrosión y Protección CyP, Buffon 46, 11590 Mexico City, DF, Mexico

Received 2 December 2014; Accepted 17 February 2015

Academic Editor: Stephen Cooke

Copyright © 2015 J. Porcayo-Calderon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Fatty-amide derivatives were evaluated to study the effect of the double bonds into the hydrocarbon chain C18 on the corrosion behavior of carbon steel. Electrochemical impedance spectroscopy EIS and real-time corrosion measurements were used to evaluate the inhibition mechanism of the fatty-amides on carbon steel in CO2-saturated 3% NaCl + 10% diesel emulsion at 50°C. EIS results demonstrated that the unsaturation present into the hydrocarbon chain contributes to the efficiency of fatty-amides, because they can be adsorbed on the metal surface by a flat-adsorption process reducing the presence of active sites and blocking the corrosion process and preventing the diffusion of corrosive species, such as H2O, H

, Cl

, and . Real-time corrosion measurements also indicated that the effectiveness of the inhibitors is dependent on the unsaturation into the hydrocarbon chain, being also a good technique to determine the stability of the adsorption process of the inhibitors.





Autor: J. Porcayo-Calderon, I. Regla, E. Vazquez-Velez, L. M. Martinez de la Escalera, J. Canto, and M. Casales-Diaz

Fuente: https://www.hindawi.com/



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