Mild steel corrosion inhibition in acidic media using <i>Sarcocephalus latifolius</i> leaves extract

Abstract

At temperatures between 303K and 323K, three different concentrations of the methanol extract from Sarcocephalus latifolius were utilized to inhibit the corrosion of mild steel coupons in a 0.9M HCl solution. The plant extract adhered to the surface of mild steel metal under the investigated conditions, according to surface characterization techniques including SEM and FT-IR. It has been proven through weight loss trials in this work that the plant extract's ability to suppress growth improves with both an increase in its concentration and a decrease in temperature. The corrosion and inhibition processes were presented as being viable and spontaneous using thermodynamic parameters. Additionally, it was determined that the inhibitory process followed first order kinetics, with half life values rising as plant extract concentration did. Calculated activation energy values and isotherm characteristics demonstrated that the process adheres to the physical adsorption mechanism.