Investigation of the inhibition efficiency of Irish potatoes leaves extract on aluminium sheet in acidic medium

Abstract

Aluminium is the most widely used non-ferrous metal, hence there is need to protect it from corrosion. This research work, investigated the inhibitive property of the ethanol extract obtained from Irish potato leaves (Solamun tuberosum) for aluminium corrosion using 2M H₂SO₄ as a medium. The inhibitive effect of the extract against the corrosion of aluminium was investigated using gravimetric technique at various concentrations of the extract (0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, and 4.0 g/L). The results revealed that with increase in concentrations of the extract, the corrosion rate decreases and the highest inhibition efficiency was found to be 77.78% at 4.0 g/L of the extract. Additionally, the adsorption of the extract on the aluminium surface was found to obey Langmuir’s adsorption isotherm. However, the plant extract proved to be effective inhibitor on the corrosion of aluminium in the acid medium and can be used as green inhibitor.