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Analytical and Bioanalytical Electrochemistry، جلد ۱۵، شماره ۱۰، صفحات ۸۱۵-۸۴۶
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عنوان انگلیسی Ampicillin as a Potential Environmentally Friendly Corrosion Inhibitor for 60Cu-40Zn Brass in Nitric Acid Medium: Experimental and Computational Investigations
چکیده انگلیسی مقاله In the current study, outdated Ampicillin drug (AMP) was assessed as a potent and environmentally friendly corrosion inhibitor for 60Cu-40Zn brass by gravimetric analysis, in nitric acid solution in a concentration range of 0.5M-2M. The findings revealed that AMP exhibited high corrosion inhibition performance, and its efficiency increased with the increase of its concentration and the concentration of nitric acid. In addition, potentiodynamic polarization (PDP) curves, electrochemical impedance spectroscopy (EIS), and surface analysis were conducted in 0.5 M HNO3 solution. Ampicillin was found to act as a mixed-type inhibitor, and its inhibitory efficiency increased with the addition of AMP up to 92% at its optimal concentration of 10 mM. However, it decreased slightly with increasing temperature. The adsorption thermodynamic parameters demonstrated that the medicine adsorbed onto a brass surface in accordance with the Langmuir isotherm, via physisorption and chemisorption mechanism. Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX) and   FT-IR/ATR analysis clearly evidenced the strong adsorption of AMP onto the brass surface, leading to higher corrosion resistance of the brass alloy in the inhibitive solution. Theoretical parameters of drug molecules were computed, using density functional theory (DFT) and Fukui indices, to better understand the adsorption mechanism of AMP molecules onto the brass surface. A close agreement between quantum calculations and experimental results was observed.
کلیدواژه‌های انگلیسی مقاله Brass corrosion,Nitric acid,Corrosion inhibition,Electrochemical methods,Quantum parameters
نویسندگان مقاله Sebiane Sofiane |
USTHB, Laboratory of Electrochemical-Corrosion, Metallurgy and Mineral Chemistry BP32 El-Alia Bab-Ezzouar, 16111, Algiers, Algeria

Kellou-kerkouche Farida |
USTHB, Laboratory of Electrochemical-Corrosion, Metallurgy and Mineral Chemistry BP32 El-Alia Bab-Ezzouar, 16111, Algiers, Algeria

Idir Brahim |
USTHB, Laboratory of Electrochemical-Corrosion, Metallurgy and Mineral Chemistry BP32 El-Alia Bab-Ezzouar, 16111, Algiers, Algeria

نشانی اینترنتی https://www.abechem.com/article_708673_ab585548ff49e102b3ff7aac60a27ca1.pdf
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