The inhibition of aluminium corrosion in hydrochloric acid solution by ethanolic extract of Maesobatrya barteri leaf was studied using weight loss and thermometric methods. The results obtained show that Maesobatrya barteri leaf extract significantly inhibited the corrosion of aluminium in HCl solution. Inhibition efficiency was found to decrease with increase in extract concentration and temperature. The adsorption of the extract obeyed Freundlich adsorption isotherm. Physical adsorption has been proposed for the adsorption of Maesobatrya barteri leaf extract on aluminium surface. The calculated thermodynamic parameters reveal that the corrosion inhibition process was both endothermic and spontaneous.
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