Understanding the adsorption of 4 H ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Understanding the adsorption of 4 H -1,2,4-triazole derivatives on mild steel surface in molar hydrochloric acid
Author(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]
Journal title :
Applied Surface Science
Volume number :
253
Pages :
3696-3704
Publisher :
Elsevier BV
Publication date :
2007-01-30
ISSN :
0169-4332
English keyword(s) :
Corrosion inhibition
Mild steel
4H-Triazoles
HCl solution
Adsorption
Molecular structure
Mild steel
4H-Triazoles
HCl solution
Adsorption
Molecular structure
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Submission date :
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