Omeprazole's Inhibitive Activity on the Corrosion of the Al Alloy in 0.5 M H2SO4 Solution

Belafhaili, A.; El Hawary, M.; Bellaouchou, A.; Guenbour, A.; Warad, I.; Zarrouk, Abdelkader M

doi:10.22034/abec.2023.702330

Omeprazole's Inhibitive Activity on the Corrosion of the Al Alloy in 0.5 M H2SO4 Solution

Document Type : Original Article

Authors

A. Belafhaili ¹

M. El Hawary ¹

A. Bellaouchou ¹

A. Guenbour ¹

I. Warad ²

Abdelkader M Zarrouk ³

¹ Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University in Rabat, Av. Ibn Battouta, P.O. Box. 1014 Agdal-Rabat, Morocco

² Department of Chemistry, AN-Najah National University, P.O. Box 7, Nablus, Palestine

³ Laboratory of Materials, Nanotechnology and Environment, Faculty of Sciences, Mohammed V University in Rabat, Av. Ibn Battouta, P.O. Box. 1014 Agdal-Rabat, Moroccoco

10.22034/abec.2023.702330

Abstract

Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques were used to examine the inhibitory effect of omeprazole (OMP) on the corrosive behavior of Al-Mg-Si alloy in 0.5 M H₂SO₄. SEM/EDS microscopy methods and
X-ray diffraction (XRD) analysis were utilized to examine the surface morphology. According to the findings, OMP acted flawlessly as an inhibitor of corrosion for an Al-Mg-Si alloy in 0.5 M H₂SO₄ at 298 K. The effect of temperature on inhibition efficiency was also discussed. Moreover, the experimental results suggest that OMP is an effective inhibitor, with a maximum inhibition efficiency of 90.5% at a concentration of 1.5 g/L, and the potentiodynamic polarization curves show that it is a mixed-type inhibitor. Electrochemical impedance spectroscopy discovered that an inhibitory adsorption film was being formed on the surface of the Al-Mg-Si alloy, and that this adsorption isotherm model is being followed. Thermodynamic activation parameters have been identified and discussed.

Keywords

Aluminium alloy corrosion

Sulfuric acid

Omeprazole

Electrochemical techniques

SEM/EDS/XRD