Understanding the adsorption of 4 H ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Understanding the adsorption of 4 H -1,2,4-triazole derivatives on mild steel surface in molar hydrochloric acid
Auteur(s) :
Bentiss, Fouad [Auteur]
Université Chouaib Doukkali [UCD]
Bouanis, M. [Auteur]
Université Chouaib Doukkali [UCD]
Mernari, B. [Auteur]
Université Chouaib Doukkali [UCD]
Traisnel, Michel [Auteur]
Laboratoire de structures et propriétés de l'état solide - UMR 8008 [LSPES]
Vezin, Herve [Auteur]
Laboratoire de Chimie Organique et Macromoleculaire [UMR CNRS 8009]
Lagrenée, M. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Université Chouaib Doukkali [UCD]
Bouanis, M. [Auteur]
Université Chouaib Doukkali [UCD]
Mernari, B. [Auteur]
Université Chouaib Doukkali [UCD]
Traisnel, Michel [Auteur]
Laboratoire de structures et propriétés de l'état solide - UMR 8008 [LSPES]
Vezin, Herve [Auteur]
Laboratoire de Chimie Organique et Macromoleculaire [UMR CNRS 8009]
Lagrenée, M. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Titre de la revue :
Applied Surface Science
Numéro :
253
Pagination :
3696-3704
Éditeur :
Elsevier BV
Date de publication :
2007-01-30
ISSN :
0169-4332
Mot(s)-clé(s) en anglais :
Corrosion inhibition
Mild steel
4H-Triazoles
HCl solution
Adsorption
Molecular structure
Mild steel
4H-Triazoles
HCl solution
Adsorption
Molecular structure
Discipline(s) HAL :
Chimie/Chimie théorique et/ou physique
Résumé en anglais : [en]
This study examines the use of some 4H-triazole derivatives, namely 3,5-diphenyl-4H-1,2,4-triazole (DHT), 3,5-bis(4-pyridyl)-4H-1,2,4-triazole (4-PHT) and 3,5-bis(4-methyltiophenyl)-4H-1,2,4-triazole (4-MTHT) for corrosion ...
Lire la suite >This study examines the use of some 4H-triazole derivatives, namely 3,5-diphenyl-4H-1,2,4-triazole (DHT), 3,5-bis(4-pyridyl)-4H-1,2,4-triazole (4-PHT) and 3,5-bis(4-methyltiophenyl)-4H-1,2,4-triazole (4-MTHT) for corrosion and dissolution protection of mild steel in normal hydrochloric acid solution. The inhibiting efficiency of the different additives is evaluated by means of weight loss and electrochemical techniques such as ac impedance measurements and polarisation curves. The experimental results obtained reveal that 4-MTHT is the best effective inhibitor and the inhibition efficiency is found to be in the following order: 4-MTHT > 4-PHT > DHT. The variation in inhibitive efficiency mainly depends on the type and nature of the substituents present in the inhibitor molecule. Polarisation curves show that theses triazoles are mixed-type inhibitors in 1 M HCl. The inhibition efficiency increases with 4H-triazole derivatives concentration and attains the maximum value of 99.6% in the case of 4-MTHT at 5 × 10−4 M. The results obtained from weight loss electrochemical studies were in reasonable agreement. The adsorption of 4H-triazole derivatives on the steel surface obeys to the Langmuir isotherm model. The thermodynamic data of adsorption and activation are determined and discussed. The fundamental thermodynamic functions were used to glean important information about the 4H-triazoles inhibitory behaviour. Molecular modeling was used to get better insight, about structural and electronic effects in relation to the inhibition efficiencies.Lire moins >
Lire la suite >This study examines the use of some 4H-triazole derivatives, namely 3,5-diphenyl-4H-1,2,4-triazole (DHT), 3,5-bis(4-pyridyl)-4H-1,2,4-triazole (4-PHT) and 3,5-bis(4-methyltiophenyl)-4H-1,2,4-triazole (4-MTHT) for corrosion and dissolution protection of mild steel in normal hydrochloric acid solution. The inhibiting efficiency of the different additives is evaluated by means of weight loss and electrochemical techniques such as ac impedance measurements and polarisation curves. The experimental results obtained reveal that 4-MTHT is the best effective inhibitor and the inhibition efficiency is found to be in the following order: 4-MTHT > 4-PHT > DHT. The variation in inhibitive efficiency mainly depends on the type and nature of the substituents present in the inhibitor molecule. Polarisation curves show that theses triazoles are mixed-type inhibitors in 1 M HCl. The inhibition efficiency increases with 4H-triazole derivatives concentration and attains the maximum value of 99.6% in the case of 4-MTHT at 5 × 10−4 M. The results obtained from weight loss electrochemical studies were in reasonable agreement. The adsorption of 4H-triazole derivatives on the steel surface obeys to the Langmuir isotherm model. The thermodynamic data of adsorption and activation are determined and discussed. The fundamental thermodynamic functions were used to glean important information about the 4H-triazoles inhibitory behaviour. Molecular modeling was used to get better insight, about structural and electronic effects in relation to the inhibition efficiencies.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Date de dépôt :
2021-06-18T09:03:29Z
2021-10-11T13:55:50Z
2021-10-12T16:35:26Z
2021-10-11T13:55:50Z
2021-10-12T16:35:26Z