Insights into using a Schiff base as corrosion inhibitor for carbon steel in HCl medium: Experimental and theoretical approaches
Eltohamy, A., Kamel, M., Aboelmagd, A., Rashwan, S., Fouda, A., Awad, M., Atlam, F. (2024). Insights into using a Schiff base as corrosion inhibitor for carbon steel in HCl medium: Experimental and theoretical approaches. EKB Journal Management System, 31(1), 25-39. doi: 10.21608/cat.2024.240859.1210
Amal R. Eltohamy; Medhat M. Kamel; Ahmed Aboelmagd; Salah M. Rashwan; A. S. Fouda; M. K. Awad; F. M. Atlam. "Insights into using a Schiff base as corrosion inhibitor for carbon steel in HCl medium: Experimental and theoretical approaches". EKB Journal Management System, 31, 1, 2024, 25-39. doi: 10.21608/cat.2024.240859.1210
Eltohamy, A., Kamel, M., Aboelmagd, A., Rashwan, S., Fouda, A., Awad, M., Atlam, F. (2024). 'Insights into using a Schiff base as corrosion inhibitor for carbon steel in HCl medium: Experimental and theoretical approaches', EKB Journal Management System, 31(1), pp. 25-39. doi: 10.21608/cat.2024.240859.1210
Eltohamy, A., Kamel, M., Aboelmagd, A., Rashwan, S., Fouda, A., Awad, M., Atlam, F. Insights into using a Schiff base as corrosion inhibitor for carbon steel in HCl medium: Experimental and theoretical approaches. EKB Journal Management System, 2024; 31(1): 25-39. doi: 10.21608/cat.2024.240859.1210

Insights into using a Schiff base as corrosion inhibitor for carbon steel in HCl medium: Experimental and theoretical approaches

Catrina: The International Journal of Environmental Sciences
Volume 31, Issue 1, August 2024, Page 25-39  XML PDF (1.83 MB)
Document Type: Original Article
DOI: 10.21608/cat.2024.240859.1210
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Authors
Amal R. Eltohamy email 1; Medhat M. Kamel1; Ahmed Aboelmagd1; Salah M. Rashwan1; A. S. Fouda2; M. K. Awad3; F. M. Atlam3
1Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
2Department of Chemistry, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
3Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt
Abstract
In an aqueous environment, the corrosion of metals or alloys is often inhibited by the application of organic inhibitors. On carbon steel (CS), N, N′-bis (salicylidene) butylene-1,4-diamine (SB) was investigated for its anticorrosive properties. With the use of potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and weight loss (WL) measurements, corrosion behavior in the temperature range of 298-333 K, both with and without the SB inhibitor, was predicted. A maximal inhibitory effectiveness of 84.0% was observed in half molar HCl at 298 K, and it rises as SB (50-300 ppm) concentration increases. The variation in kinetic and thermodynamic properties of SB on CS indicates mixed adsorption (physisorption and chemisorption). The polarization curves indicate its mixed kind of inhibition activity followed by the Langmuir adsorption isotherm. The experimental results are supported by density functional theory (DFT) and Monte Carlo (MC) simulations, indicating the potential corrosion inhibition behavior of SB on CS in acidic environments. SEM and EDX analyses revealed the development and adsorption of a continuous layer at CS in the presence of the SB chemical. The quantum characteristics of SB supported its efficacy as an inhibitor.
Keywords
Corrosion inhibition; Carbon steel; HCl; Schiff base; Quantum chemical calculation
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