Experimental and Theoretical Study on the Corrosion Inhibition of Mild Steel in Acidic Medium Using Ethanolic Extract of ziziphus spina-christi leaves

This study investigates the corrosion inhibition of mild steel in 0.3 M HCl using ethanolic extract of Ziziphus spina-christi leaves.Using the weight loss technique, the extract demonstrated good corrosion inhibition efficiency, ranging from 56.13% to 64.24% at 303 K.The corrosion rate decreased as the inhibitor concentration increased, with surface coverage and inhibitor efficiency improving as well.The adsorption of the extract on the mild steel surface was exothermic, spontaneous, and aligned with physical adsorption.The adsorption followed the Langmuir isotherm.