Abstract
Expired Tylosin Drug (ETD) is examined as corrosion inhibitor for copper (Cu) dipped in 2.0 M HNO3. The study was conducted utilizing ac impedance spectroscopy (EIS), weight loss (WL), polarization, and surface checks to illustrate the importance of this ETD to prevent the corrosion process for Cu. The influence of temperature and concentration of ETD on the efficiency of inhibition were tested. The corrosion mechanism occurs when the ETD molecules block the active center in the electrode surface. Langmuir isotherm is the isotherm that is applied in the process of adsorption. The effect of temperature at various temperatures on the corrosion efficiency was investigated in case of the presence and absence of ETD. Finally, thermodynamic parameters for the inhibition process were determined. Results were of all methods used are in good agreement.
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