Titre :

Anticorrosion performance of three newly synthesized isatin derivatives on carbon steel in hydrochloric acid pickling environment: Electrochemical, surface and theoretical studies

Auteur(s) :

Kharbach, Y. [Auteur]
Université Sidi Mohamed Ben Abdellah [USMBA]
Qachchachi, F.Z. [Auteur]
Université Sidi Mohamed Ben Abdellah [USMBA]
Haoudi, A. [Auteur]
Université Sidi Mohamed Ben Abdellah [USMBA]
Tourabi, M. [Auteur]
Université Chouaib Doukkali [UCD]
Zarrouk, Abdelkader [Auteur]
Université Mohammed Premier [Oujda] = Université Mohammed Ier
Jama, Charafeddine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Olasunkanmi, L.O. [Auteur]
Obafemi Awolowo University [OAU]
North-West University [Potchefstroom] [NWU]
Ebenso, Eno-E [Auteur]
North-West University [Vaal Triangle Campus, Vanderbijlpark, South Africa] [NWU]
Bentiss, Fouad [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bentiss, Fouad [Auteur]

Titre de la revue :

Journal of Molecular Liquids

Numéro :

246

Pagination :

302-316

Date de publication :

2017-11

Discipline(s) HAL :

Sciences de l'ingénieur [physics]/Matériaux
Sciences de l'ingénieur [physics]/Génie des procédés
Chimie/Matériaux
Chimie/Polymères

Résumé en anglais : [en]

In this work, three new isatin derivatives (5-BEI, 5-HEI and 5-FEI) were synthesized and their inhibition effect on carbon steel in hydrochloric acid medium has been evaluated. The detailed study of 5-BEI is given using ...
Lire la suite >In this work, three new isatin derivatives (5-BEI, 5-HEI and 5-FEI) were synthesized and their inhibition effect on carbon steel in hydrochloric acid medium has been evaluated. The detailed study of 5-BEI is given using gravimetric measurements and electrochemical methods (DC and AC techniques). The results showed that this new isatin is an efficient corrosion inhibitor for carbon steel in 1 M HCl and an inhibition efficiency of 95.2% was exhibited by 5-BEI at 1 mM concentration of 5-BEI after 6 h of immersion at 303 K. Polarization curves suggested that the 5-BEI acted as mixed type inhibitor. Electrochemical impedance spectroscopy showed that increase inhibitor (5-BEI, 5-HEI and 5-FEI) concentration leads to an increase in the values of the charge transfer resistance. Adsorption of 5-BEI, 5-HEI and 5-FEI molecules on the steel surface obeyed Langmuir adsorption isotherm model. X-Ray Photoelectron Spectroscopy (XPS) analyses revealed that the corrosion inhibition mechanism of 5-BEI is mainly controlled by a chemisorption process. The comparative study of inhibitive performance of the three isatin derivatives (5-BEI, 5-HEI and 5-FEI) using Density functional theory (DFT) calculations of orbital energies and reactivity indices suggested that the trend of inhibition potentials of the compounds depend on the effect of substituent atoms (single bondBr, single bondF, and single bondH) on the electron donating and/or accepting ability of the molecules. The trend of reactivity of the molecules was 5-BEI > 5-FEI > 5-HEI. Theoretical Monte Carlo simulation studies also corroborated experimental findings.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2019-05-17T09:11:24Z
2024-05-14T06:48:13Z