Experimental and Computational Chemical Studies on the Corrosion Inhibition Performance of Two Antibiotics for Copper in Hydrochloric Acid Media
نویسندگان
1 1 Assistant Professor, Department of Mechanics, Faculty of Engineering, Lian Institute of Higher Education, Bushehr, Iran
2 2 Assistant Professor, Department of Chemistry, University of Sistan and Baluchestan, Zahedan, Iran
3 3 Assistant Professor, Department of Chemistry, University of Sistan and Baluchestan, Zahedan, Iran
doi
10.22050/ijogst.2025.392040.1675چکیده
The corrosion inhibition effects of two antibiotic compounds, tetracycline (TE) and streptomycin (ST), on the corrosion of copper sheets in 1 M hydrochloric acid were investigated using weight loss measurements, Tafel polarization, electrochemical impedance spectroscopy, scanning electron microscopy, molecular dynamics simulations, and quantum chemical calculations. The Tafel polarization results indicated that both inhibitors act as mixed-type inhibitors and showed that the inhibition efficiency of streptomycin is higher than that of tetracycline. In addition, the adsorption behavior of the inhibitors was found to be consistent with the Temkin adsorption isotherm. As a complementary approach, computational chemical studies were performed. Molecular dynamics simulations were used to evaluate the most stable configurations and adsorption energies of the two compounds on the Cu 100, Cu 110, and Cu 111 surfaces. The theoretical results provide substantial support for understanding the inhibition mechanism of the two antibiotic compounds and show good agreement with the experimental findings.
