Ethanol Extract of Mango ( Mangifera indica ) Peel as a Green Inhibitor in the Corrosion of Carbon Steel

For some years, there has been interest in exploring the efficacy of corrosion inhibitors that are more environmentally friendly. The objective of this research is to evaluate the inhibitory potential of mango peel ethanol extract on the corrosion of carbon steel. The maceration method was used to obtain the inhibitor extract, and the concentrations used were 20, 50, and 100 ppm in a 3% NaCl saline solution that simulates a highly aggressive environment. Characterization of the chemical compounds was performed by FT‐IR and UV‐visible spectra. Electrochemical tests of electrochemical noise (EN), potentiodynamic curves, and electrochemical impedance spectroscopy (EIS) were performed. The results showed that the optimum concentration obtained for the corrosion inhibitors is 50 ppm, producing an efficiency of 63.11% in the polarization curves. The adsorption of the chemical compounds present in the mango peel extract on the surface of the steel obeys the Langmuir adsorption isotherm.