Evaluation of Anticorrosion Potential of African Black Olive (Canarium schweinfurthi) Oil as Green Corrosion Inhibtor on Aluminium Sheet in Acidic Medium

Abstract

This study evaluated the anticorrosion potential of African black olive oil obtained from its fruit (pulp) on Aluminium sheet in 2M H₂SO₄ using gravimetric method_. The extraction was carried out using soxhlet extractor and the oil was characterised using Fourier Transform Infrared Spectrophotometer (FTIR). The results showed that the oil exhibits maximum inhibitive efficiency of 88.57%. The FTIR analysis showed the presence of C=C-H, Ar-H bending out of plane, C-H bending in plane, C-O, N-O asymmetric stretch, C=C stretch, C=N stretch, and O-H functional groups at various peaks (wave numbers).The adsorption of the African black olive oil onto the Aluminium surface during the inhibition process obeyed Langmuir adsorption isotherm. Hence, based on the outcome of this study, the African black olive oil possessed excellent anticorrosion property for the corrosion of aluminium in the acidic medium and can also be used as green corrosion inhibitor for other metals.