Moxifloxacin Antibiotic as Green Corrosion Inhibitor for Carbon Steel in 1 M HCl

Abstract

Moxifloxacin antibiotic investigated as green corrosion inhibitor for carbon steel in 1 M HCl solution using chemical and electrochemical methods in 1 M HCl solution at 25 °C. Results showed that Moxifloxacin is an efficient inhibitor for carbon steel and the efficiency reached to 94 % at 300 ppm. The inhibition efficiency increases with Moxifloxacin concentration and decreases with increasing temperature. The adsorption of Moxifloxacin on carbon steel surface follows Langmuir adsorption isotherm. The polarization plots revealed that Moxifloxacin acts as a mixed-type inhibitor. The impedance results showed that the charge transfer resistance will increase while, the double layer capacitance decreased by increasing the concentration of Moxifloxacin. The thermodynamic parameters of activation and adsorption processes were calculated and discussed. The surface morphology of the carbon steel specimens was analyzed using scanning electron microscope and energy dispersive X-ray analysis.