ANTIBACTERIAL DRUG AS A GREEN CORROSION INHIBITOR FOR CARBON STEEL IN AQUEOUS SOLUTIONS

Abstract

Inhibitive and adsorption properties of ampicillin for the corrosion of carbon steel was investigated using chemical technique (weight loss method). ampicillin is found to inhibit the corrosion of carbon steel in 2M HNO3. Inhibition efficiencies of ampicillin increased as its concentration increases but decreased with increase in temperature. The adsorption of the inhibitor on the surface of carbon steel was found to be exothermic, spontaneous and followed the mechanism of physical adsorption. Also Langmuir adsorption isotherm was found to be the best isotherm that described the adsorption characteristics of the inhibitor.