Studies on the impact for pyrimidine compounds upon aluminum corrosion protection in acidic conditions, both experimentally and theoretically.

Ibrahim, Galal H. H.; Abdelmotelb, Mohamed; Elnouby, Mohamed S.; Mostafa, M. A.

doi:10.21608/ejchem.2023.190675.7559

Studies on the impact for pyrimidine compounds upon aluminum corrosion protection in acidic conditions, both experimentally and theoretically.

Document Type : Original Article

Authors

¹ Chemistry Department, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt

² City of Scientific Researches and Technology Applications , New Borg El Arab, Alexandria, Egypt

10.21608/ejchem.2023.190675.7559

Abstract

pyrimidine compounds were tested for aluminum corrosion prevention in 1.0 M HCl solutions at 30-60°C using the electrochemical measurement, gravimetric method , scanning electronic microscope analysis, and quantum chemical calculations. The values of inhibitory efficiency discovered using electrochemical and non-electrochemical methods show good agreement. At different temperatures and in the concentration range of 50 to 500 ppm, the inhibitory efficiency for the compounds tested ranged from 42.60 to 91.69 percent. During the adsorption process, these substances bind to the Langmuir adsorption isotherm. Some adsorption isotherm and kinetic parameters have been developed and discussed. scanning electron microscopy (SEM) analyze of the metal surface revealed the presence of a thin inhibitory protective layer. Density functional theory was employed in theoretical calculations to forecast some parameters and the outcomes were generally in agreement the findings of experiments.

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