Adsorption and inhibitive properties of ethanol extracts of Musa sapientum peels as a green corrosion inhibitor for mild steel in H2SO4

Abstract

The inhibition of the corrosion of mild steel by ethanol extract of Musa sapientum peels in H2SO4 has been
studied using gasometric and thermometric methods. The results of the study reveal s that the different
concentrations of ethanol extract of M. sapientum peels inhibit mild steel corrosion. Inhibition efficiency of the
extract is found to vary with concentration, temperature, period of immersion and pH. Values of activation energy
of the inhibited corrosion reaction of mild steel are greater than the value obtained for the blank. Thermodynamic
consideration reveals that adsorption of M. sapientum peels extract on mild steel surface is spontaneous and
occurred according to Langmuir and Frumkin adsorption isotherms. Physical adsorption mechanism has also
been proposed for the adsorption of the inhibitor.