Electrochemical, surface analysis, computational and anticorrosive studies of novel naphthalene derivative on carbon steel surface

• E.H. Akroujai¹, S. Chetioui^2,3, N. Benzbiria⁴, A. Barrahi⁵, A. Chraka⁶, A. Djedouani^7,8, S. Chtita⁹, B. Dikici¹⁰, I. Warad¹¹, A. Bellaouchou⁵, M. Assouag¹ and A. Zarrouk⁵

¹ Team of Innovative Materials and Mechanical Manufacturing Processes, ENSAM, University Moulay Ismail, B.P. 15290, Al Mansour, Meknes, Morocco
² Unité de Recherche de Chimie de l’Environnement et Moléculaire Structurale, (CHEMS), Faculté des Sciences Exactes, Département de Chimie, Université des Frères Mentouri, Constantine 1, Constantine 25000, Algérie
³ Faculté de Technologie, Université Mohamed Boudiaf M’sila, Algérie
⁴ Laboratory of Interface Materials and Environment, Faculty of Sciences Ain Chock, Hassan II University, B.P. 5366 Maârif, Casablanca, Morocco
⁵ Laboratory of Materials, Nanotechnology, and Environment, Faculty of Sciences, Mohammed V University in Rabat, Morocco, PO. Box. 1014, Rabat, Morocco
⁶ Materials and Interfacial Systems Laboratory, ERESI Team, Department of Chemistry, Faculty of Sciences, Abdelmalek Essaâdi University, Morocco
⁷ Laboratoire de Physicochimie Analytique et Cristallochimie des Matériaux Organométalliques et Biomoléculaires, Université Constantine 1, 25000, Algérie
⁸ Ecole Normale Supérieure de Constantine, Université Constantine 3, 25000, Algérie
⁹ Laboratory of Analytical and Molecular Chemistry, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, Morocco
¹⁰ Ataturk University, Department of Mechanical Engineering, 25240 Erzurum, Turkey
¹¹ Department of Chemistry, AN-Najah National University, P.O. Box 7, Nablus, Palestine

Abstract: In the present research, the inhibitive potency of (E)-1-(phenyldiazenyl)naphthalen-2-ol (EPNO) for carbon steel (CS) in molar HCl acid was investigated using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). Based on the examination of Tafel data, it was revealed that EPNO displayed a mixed-type nature. EIS plots evinced that increasing the concentration of EPNO resulted in a significant 12-fold increase in polarization resistance (R_p) and a corresponding alteration in the double layer capacitance (C_dl) from 116.2 to 45.9 μF·cm^–2. The inclusion of 10^–3 M of EPNO to the solution resulted in a maximum inhibition efficiency of 91.7%. Thermodynamic activation descriptors were also assessed as a function of EPNO concentration. The adsorption of EPNO on the CS substrate followed the Langmuir isotherm. The formation of a barrier layer was confirmed by scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX) and UV-Visible assays. Overall, the findings revealed that EPNO effectively provided an adequate protection to CS and mitigated its corrosion. Finally, the theoretical studies based on the density functional theory (DFT), the molecular dynamics (MD) and the Monte Carlo (MC) simulations were also performed for understanding the adsorption mechanism of EPNO onto Fe-surface.

Keywords: naphthalene, carbon steel, corrosion, PDP/EIS, SEM/EDX/UV-Visible, DFT/MC/MD

Int. J. Corros. Scale Inhib., 2023, 12, no. 4, 1441-1475
doi: 10.17675/2305-6894-2023-12-4-5

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