Aminopyridine Schiff bases as eco-friendly corrosion inhibitors for carbon steel in acidic media: experimental and quantum chemical insights: Original scientific paper

Shereen M.  Al-Shomar; Ahmed Farag; Fekhra  Hedhili; Hissah Saedoon  Albaqawi; Nwuyer A.  Al-Shammari; Khaled M. Abdel-Azim; Nashwa S. Abdelshafi

doi:10.5599/jese.2769

Authors

Shereen M. Al-Shomar Department of Physics, College of Science, University of Ha’il, P.O. Box 2440, Ha’il, Saudi Arabia https://orcid.org/0000-0003-0791-3374
Ahmed Farag Egyptian Petroleum Research Institute (EPRI), Nasr City, 11727 Cairo, Egypt https://orcid.org/0000-0002-9019-5635
Fekhra Hedhili Department of Physics, College of Science, University of Ha’il, P.O. Box 2440, Ha’il, Saudi Arabia https://orcid.org/0000-0002-8194-9984
Hissah Saedoon Albaqawi Department of Physics, College of Science, University of Ha’il, P.O. Box 2440, Ha’il, Saudi Arabia https://orcid.org/0000-0001-6408-0343
Nwuyer A. Al-Shammari Department of Physics, College of Science, University of Ha’il, P.O. Box 2440, Ha’il, Saudi Arabia https://orcid.org/0000-0002-7139-6562
Khaled M. Abdel-Azim Chemistry Department, Faculty of Education, Ain Shams University, Roxy, Cairo 11711, Egypt https://orcid.org/0009-0009-6430-6563
Nashwa S. Abdelshafi Chemistry Department, Faculty of Education, Ain Shams University, Roxy, Cairo 11711, Egypt https://orcid.org/0000-0001-5170-1745

DOI:

https://doi.org/10.5599/jese.2769

Keywords:

Metal alloy, acid corrosion, aminopyridine inhibitors, electrochemical testing, weight loss, quantum chemical calculations

Abstract

Material degradation has received a lot of attention from the scientific community as a serious problem. However, a major barrier to the application of effective corrosion treatment is the ban on the use of inhibitors containing dangerous substances. In addition to being efficient corrosion inhibitors, Schiff bases offer pharmacological, anti-inflammatory, antibacterial, anti-cancer, and antioxidant qualities. In this experiment, two types of aminopyridine Schiff bases were used to investigate the corrosion resistance of carbon steel (C-steel) in an environment containing 1 mol L^-1 HCl. The study used weight loss and electrochemical assays to assess the corrosion-inhibiting effectiveness of two Schiff base derivatives (HAPT and HHTA). It was found that the inhibitory efficiency rises with increasing HAPT and HHTA dosages and falls with increasing temperature. HAPT and HHTA showed impressive corrosion inhibition rates of 93.4 and 95.2 %, respectively. The enhanced inhibitory efficiency results from the significant adsorption of HAPT and HHTA molecules on the C-steel surface through chemisorption and physisorption in compliance with the Langmuir adsorption isotherm. The production of an inhibitory film on the C-steel substrate was confirmed by the results of the scanning electron microscope. Density functional theory and molecular dynamics computations in quantum chemistry were used to identify the adsorption of HAPT and HHTA at the steel/solution interface.

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Aminopyridine Schiff bases as eco-friendly corrosion inhibitors for carbon steel in acidic media: experimental and quantum chemical insights

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