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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Corrosion control of mild steel using 3,5-bis(4-methoxyphenyl)-4-amino-1,2,4-triazole in normal hydrochloric acid medium
Corrosion Science, Volume 51, No. 8, Year 2009
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Description
The inhibition performance of the 3,5-bis(4-methoxyphenyl)-4-amino-1,2,4-triazole (4-MAT) on mild steel in normal hydrochloric acid medium (1 M HCl) at 30 °C was tested by weight loss, potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques. This organic compound inhibits the acidic corrosion even at very low concentration, reaching a value of inhibition efficiency up to 98% at a concentration of 3 × 10-4 M. The results obtained from the different corrosion evaluation techniques are in good agreement. Polarisation curves indicate that 4-MAT is a mixed inhibitor, affecting both cathodic and anodic corrosion currents. Data, obtained from EIS measurements, were analyzed to model the corrosion inhibition process through appropriate equivalent circuit model, a constant phase element (CPE) has been used. The adsorption of 4-MAT on the steel surface, in 1 M HCl solution, obeys to Langmuir's isotherm with a very high negative value of the free energy of adsorption ΔG°ads (chemisorption). X-ray photoelectron spectroscopy (XPS) was carried out to establish the mechanism of corrosion inhibition of mild steel in 1 M HCl medium in the presence of 3,5-bis(4-methoxyphenyl)-4-amino-1,2,4-triazole (4-MAT). © 2009 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Bentiss, F.
Morocco, El Jadida
Faculté Des Sciences D'el Jadida
Jama, Charafeddine
France, Villeneuve-d'ascq
Unité Matériaux et Transformations Umet
Mernari, Bouchaïb
Morocco, El Jadida
Faculté Des Sciences D'el Jadida
Attari, Hassan El
Morocco, El Jadida
Faculté Des Sciences D'el Jadida
Kadi, Lamia El
Morocco, El Jadida
Faculté Des Sciences D'el Jadida
Lebrini, Mounim
France, Villeneuve-d'ascq
Unité Matériaux et Transformations Umet
Traisnel, Michel M.
France, Villeneuve-d'ascq
Unité Matériaux et Transformations Umet
Lagrenee, Michel
France, Villeneuve-d'ascq
Unité de Catalyse et Chimie du Solide Uccs
Statistics
Citations: 354
Authors: 8
Affiliations: 3
Identifiers
Doi:
10.1016/j.corsci.2009.04.009
ISSN:
0010938X