Physicochemical Evidence for the Adsorption of Extract of Jacaranda Mimosifolia on Steel Against Corrosion in Acid Medium

Abstract

For the first time, the homogeneous adsorption of ethanolic extract of Jacaranda mimosifolia green inhibitor is evaluated for inhibition of steel corrosion in acid environment. The inhibitive properties are evaluated by means of weight loss measurements, polarization studies, and electrochemical impedance spectroscopy. A maximum of 96% of inhibition efficiency is achieved by using 500 ppm of the green inhibitor. The mechanism and nature of adsorption of inhibitor on the surface of steel are evidenced by Langmuir adsorption isotherm and energy dispersive X-ray spectral elemental mapping.