Experimental study on corrosion inhibition of mild steel using Mukia maderaspatana leaves extract as green inhibitor

Abstract

In this work, investigations were conducted into the adsorption behaviour and inhibitory effect of Mukia maderaspatana leaves extract on the corrosion of mild steel in 1.5M HCl solution at several temperatures. The techniques included chemical methods (weight loss measurements), surface analysis (SEM, FESEM) and solution analysis (UV–visible spectrophotometric, ICP-MS) techniques. The examination of the data revealed that the efficiency of inhibition rose as the inhibitor's concentration increased and fell as the temperature increased. At 30 degrees Celsius, the concentration of inhibitor resulted in an increase in corrosion inhibition efficiency, reaching 99.02% efficiency at 8% concentration. The physical adsorption of the inhibitor on the metal surface was demonstrated by the adsorption free energy of the plant extract on mild steel. The conclusions above are supported by data from examinations of Scanning Electron Microscopy, FESEM, UV–visible and Fourier transform infrared spectrophotometry.