Combined electronic/atomic level computational, surface (SEM/EDS), chemical and electrochemical studies of the mild steel surface by quinoxalines derivatives anti-corrosion properties in 1 mol·L-1 HCl solution

doi:10.1016/j.cjche.2020.03.002

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (5): 1436-1458.DOI: 10.1016/j.cjche.2020.03.002

• Materials and Product Engineering • 上一篇下一篇

Combined electronic/atomic level computational, surface (SEM/EDS), chemical and electrochemical studies of the mild steel surface by quinoxalines derivatives anti-corrosion properties in 1 mol·L^-1 HCl solution

F. Benhiba^1,2, Z. Benzekri³, A. Guenbour², M. Tabyaoui², A. Bellaouchou², S. Boukhris³, H. Oudda¹, I. Warad⁴, A. Zarrouk²

1 Laboratory of Separation Processes, Faculty of Sciences, Ibn Tofail University, P. O. Box 133, 14000, Kenitra, Morocco;
2 Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University, Av. Ibn Battouta, P. O. Box 1014, Agdal-Rabat, Morocco;
3 Laboratory of Organic Synthesis, Organometallic and Theoretical, Faculty of Sciences, Ibn Tofail University, P. O. Box 133, 14000, Kenitra, Morocco;
4 Department of Chemistry and Earth Sciences, P. O. Box 2713, Qatar University, Doha, Qatar

收稿日期:2019-04-25 修回日期:2020-01-30 出版日期:2020-05-28 发布日期:2020-07-29
通讯作者: A. Zarrouk

Combined electronic/atomic level computational, surface (SEM/EDS), chemical and electrochemical studies of the mild steel surface by quinoxalines derivatives anti-corrosion properties in 1 mol·L^-1 HCl solution

F. Benhiba^1,2, Z. Benzekri³, A. Guenbour², M. Tabyaoui², A. Bellaouchou², S. Boukhris³, H. Oudda¹, I. Warad⁴, A. Zarrouk²

1 Laboratory of Separation Processes, Faculty of Sciences, Ibn Tofail University, P. O. Box 133, 14000, Kenitra, Morocco;
2 Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University, Av. Ibn Battouta, P. O. Box 1014, Agdal-Rabat, Morocco;
3 Laboratory of Organic Synthesis, Organometallic and Theoretical, Faculty of Sciences, Ibn Tofail University, P. O. Box 133, 14000, Kenitra, Morocco;
4 Department of Chemistry and Earth Sciences, P. O. Box 2713, Qatar University, Doha, Qatar

Received:2019-04-25 Revised:2020-01-30 Online:2020-05-28 Published:2020-07-29
Contact: A. Zarrouk

摘要/Abstract

摘要： This work is devoted to the study of the inhibition of corrosion of mild steel (MS) in molar hydrochloric acid (1 mol·L^-1 HCl) by two named quinoxaline derivatives namely, 2-(2,4-dichlorophenyl)-1,4-dihydroquinoxaline (HQ) and 2-(2,4-dichlorophenyl)-6-methyl-1,4-dihydroquinoxaline (CQ). The inhibitory efficacy of HQ and CQ compounds is first evaluated using the gravimetric method and using electrochemical techniques (stationary and transient techniques). The results showed that our compounds are efficient corrosion inhibitors and the inhibition rates (η_EIS%) reached up to 91% and 94.2% at 10^-3 mol·L^-1 for HQ and CQ, respectively. The mentioned molecules are classified as mixed-type inhibitors. The adsorption of these inhibitors on the surface of steel in hydrochloric HCl 1 mol·L^-1 medium obeys the Langmuir adsorption isotherm. The results of the scanning electron microscope (SEM) showed the formation of a protective film on the surface of the steel in the presence of the inhibitors studied. Elementary analysis is obtained by energy dispersive X-ray spectroscopy (EDS). The inhibition property was further elucidated by theoretical approaches such as:Density Functional Theory (DFT), quantum chemical descriptors (QCD), local reactive indices, solvent effect, theoretical complexation, Molecular Dynamic (MD) simulation, effect of temperature on adsorption energy (E_ads), Radial Distribution Function (RDF), and Mean Square Displacement (MSD). The results of these approaches support the experimental results.

关键词: Mild steel corrosion, Quinoxaline derivatives, Electrochemical techniques, SEM/EDS, MD

Abstract: This work is devoted to the study of the inhibition of corrosion of mild steel (MS) in molar hydrochloric acid (1 mol·L^-1 HCl) by two named quinoxaline derivatives namely, 2-(2,4-dichlorophenyl)-1,4-dihydroquinoxaline (HQ) and 2-(2,4-dichlorophenyl)-6-methyl-1,4-dihydroquinoxaline (CQ). The inhibitory efficacy of HQ and CQ compounds is first evaluated using the gravimetric method and using electrochemical techniques (stationary and transient techniques). The results showed that our compounds are efficient corrosion inhibitors and the inhibition rates (η_EIS%) reached up to 91% and 94.2% at 10^-3 mol·L^-1 for HQ and CQ, respectively. The mentioned molecules are classified as mixed-type inhibitors. The adsorption of these inhibitors on the surface of steel in hydrochloric HCl 1 mol·L^-1 medium obeys the Langmuir adsorption isotherm. The results of the scanning electron microscope (SEM) showed the formation of a protective film on the surface of the steel in the presence of the inhibitors studied. Elementary analysis is obtained by energy dispersive X-ray spectroscopy (EDS). The inhibition property was further elucidated by theoretical approaches such as:Density Functional Theory (DFT), quantum chemical descriptors (QCD), local reactive indices, solvent effect, theoretical complexation, Molecular Dynamic (MD) simulation, effect of temperature on adsorption energy (E_ads), Radial Distribution Function (RDF), and Mean Square Displacement (MSD). The results of these approaches support the experimental results.

Key words: Mild steel corrosion, Quinoxaline derivatives, Electrochemical techniques, SEM/EDS, MD

F. Benhiba, Z. Benzekri, A. Guenbour, M. Tabyaoui, A. Bellaouchou, S. Boukhris, H. Oudda, I. Warad, A. Zarrouk. Combined electronic/atomic level computational, surface (SEM/EDS), chemical and electrochemical studies of the mild steel surface by quinoxalines derivatives anti-corrosion properties in 1 mol·L^-1 HCl solution[J]. 中国化学工程学报, 2020, 28(5): 1436-1458.

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Combined electronic/atomic level computational, surface (SEM/EDS), chemical and electrochemical studies of the mild steel surface by quinoxalines derivatives anti-corrosion properties in 1 mol·L^-1 HCl solution

Combined electronic/atomic level computational, surface (SEM/EDS), chemical and electrochemical studies of the mild steel surface by quinoxalines derivatives anti-corrosion properties in 1 mol·L^-1 HCl solution

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