Coupling of chemical, electrochemical and theoretical approach to study the corrosion inhibition of mild steel by new quinoxaline compounds in 1 M HCl
T. Laabaissi,
F. Benhiba,
M. Missioui,
Z. Rouifi,
M. Rbaa,
H. Oudda,
Y. Ramli,
A. Guenbour,
I. Warad,
A. Zarrouk
Affiliations
T. Laabaissi
Laboratory of Separation Processes, Faculty of Science, University Ibn Tofail, PO Box 133, 14000, Kenitra, Morocco
F. Benhiba
Laboratory of Separation Processes, Faculty of Science, University Ibn Tofail, PO Box 133, 14000, Kenitra, Morocco; Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University, P.O. Box. 1014, Agdal-Rabat, Morocco
M. Missioui
Laboratory of Medecinal Chemistry, Faculty of Medicine and Pharmacy, Mohammed V University, Rabat, Morocco
Z. Rouifi
Laboratory of Separation Processes, Faculty of Science, University Ibn Tofail, PO Box 133, 14000, Kenitra, Morocco
M. Rbaa
Laboratory of Agro-Resources, Polymers and Process Engineering, Department of Chemistry, Faculty of Science, Ibn Tofail University, PO Box 133, 14000, Kenitra, Morocco
H. Oudda
Laboratory of Separation Processes, Faculty of Science, University Ibn Tofail, PO Box 133, 14000, Kenitra, Morocco
Y. Ramli
Laboratory of Medecinal Chemistry, Faculty of Medicine and Pharmacy, Mohammed V University, Rabat, Morocco
A. Guenbour
Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University, P.O. Box. 1014, Agdal-Rabat, Morocco
I. Warad
Department of Chemistry and Earth Sciences, PO Box 2713, Qatar University, Doha, Qatar
A. Zarrouk
Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University, P.O. Box. 1014, Agdal-Rabat, Morocco; Corresponding author.
The corrosion inhibition displays of two quinoxaline derivatives, on the corrosion of M-steel (M-steel) in 1 M HCl was studied by gravimetric, electrochemical, scanning electron microscopy (SEM), functional density theory (DFT) and molecular dynamic simulation (MD). The inhibitory efficacy increases with decreasing temperature and increases with inhibitor concentration and reached to 96 % (NSQN) and 92 % (CSQN) at 303 K and the optimum concentration (1×10-3 M). Ultraviolet–visible (UV–vis) spectroscopic analyses confirmed the presence of chemical interactions between the inhibitors and MS surface. The adsorption of NSQN & CSQN on the metallic surface obeys the Langmuir isotherm. A potentiodynamic polarization study confirmed that the inhibitors are of mixed-kind inhibitors. Theoretical computation (DFT) and molecular dynamics simulation (MD) are utilized to understand the mechanism of inhibition.
