Academic Journal
Understanding the adsorption of 4 H -1,2,4-triazole derivatives on mild steel surface in molar hydrochloric acid
| العنوان: | Understanding the adsorption of 4 H -1,2,4-triazole derivatives on mild steel surface in molar hydrochloric acid |
|---|---|
| المؤلفون: | Bentiss, Fouad, Bouanis, M., Mernari, B., Traisnel, Michel, Vezin, Herve, Lagrenée, M. |
| المساهمون: | Université Chouaib Doukkali (UCD), Laboratoire de structures et propriétés de l'état solide - UMR 8008 (LSPES), Université de Lille, Sciences et Technologies-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Organique et Macromoleculaire (UMR CNRS 8009), Université de Lille, Sciences et Technologies-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | ISSN: 0169-4332. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2007 |
| المجموعة: | LillOA (HAL Lille Open Archive, Université de Lille) |
| مصطلحات موضوعية: | Corrosion inhibition, Mild steel, 4H-Triazoles, HCl solution, Adsorption, Molecular structure, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry |
| الوصف: | International audience ; 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. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-03373681; https://hal.univ-lille.fr/hal-03373681 |
| DOI: | 10.1016/j.apsusc.2006.08.001 |
| الاتاحة: | https://hal.univ-lille.fr/hal-03373681 https://doi.org/10.1016/j.apsusc.2006.08.001 |
| رقم الانضمام: | edsbas.C03923C6 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.apsusc.2006.08.001 |
|---|