Corrosion Inhibition of Azo Compounds Derived from Schiff Bases on Mild Steel (XC70) in (HCl, 1 M DMSO) Medium: An Experimental and Theoretical Study

Ammar Zobeidi; Salah Neghmouche Nacer; Salem Atia; Latifa Kribaa; Aicha Kerassa; Abasse Kamarchou; Mousa AlNoaimi; Djamel Ghernaout; Mohamed A Ali; Abdelmajeed Adam Lagum; Noureddine Elboughdiri

doi:10.1021/acsomega.3c00741

Corrosion Inhibition of Azo Compounds Derived from Schiff Bases on Mild Steel (XC70) in (HCl, 1 M DMSO) Medium: An Experimental and Theoretical Study

ACS Omega. 2023 Jun 5;8(24):21571-21584. doi: 10.1021/acsomega.3c00741. eCollection 2023 Jun 20.

Authors

Ammar Zobeidi^{1

2}, Salah Neghmouche Nacer¹, Salem Atia², Latifa Kribaa², Aicha Kerassa³, Abasse Kamarchou², Mousa AlNoaimi^{4

5}, Djamel Ghernaout^{6

7}, Mohamed A Ali⁸, Abdelmajeed Adam Lagum⁹, Noureddine Elboughdiri^{6

10}

Affiliations

¹ Department of Chemistry, Faculty of Exact Sciences, University of El Oued, P.O. Box 789, El Oued 39000, Algeria.
² Pollution & Waste Treatment Laboratory (PWTL), University of Ouargla, P.O. Box 511, Ouargla 30000, Algeria.
³ Laboratory Valorization and Technology of Saharan Resources (VTRS), University of El-Oued, El-Oued 39000, Algeria.
⁴ Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait.
⁵ Department of Chemistry, Faculty of Sciences, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan.
⁶ Chemical Engineering Department, College of Engineering, University of Ha'il, Ha'il 81441, Saudi Arabia.
⁷ Chemical Engineering Department, Faculty of Engineering, University of Blida, Blida 09000, Algeria.
⁸ School of Biotechnology, Badr University in Cairo (BUC), Badr, Cairo 11829, Egypt.
⁹ Department of Civil Engineering, Faculty of Engineering, Isra University, P.O. Box 22, Amman 11622, Jordan.
¹⁰ Chemical Engineering Process Department, National School of Engineers Gabes, University of Gabes, Gabes 6029, Tunisia.

Abstract

The inhibitory activity of three prepared azo compounds derived from Schiff bases, namely, bis[5-(phenylazo)-2-hydroxybenzaldehyde]-4,4'-diaminophenylmethane (C1), bis[5-(4-methylphenylazo)-2-hydroxybenzaldehyde]-4,4'-diaminophenylmethane (C2), and bis[5-(4-bromophenylazo)-2-hydroxybenzaldehyde]-4,4'-diaminophenylmethane (C3), against corrosion of steel type XC70 in (HCl, 1 M DMSO) medium was investigated experimentally by electrochemical measurements and theoretically using density functional theory (DFT). The correlation between corrosion inhibition and concentration is direct. The maximum inhibition efficiency at 6 × 10^-5 M for the three azo compounds derived from Schiff bases was 64.37, 87.27, and 55.47% for C1, C2, and C3, respectively. The Tafel curves indicate that the inhibitors follow a mixed but predominantly anodic inhibitor system and have a Langmuir isothermal adsorption process. The observed inhibitory behavior of compounds was supported by DFT calculation. It was also found that there was a strong correspondence between the theoretical and experimental results.