The extracts of Boscia senegalensis was study as corrosion inhibitors for Aluminium in 1M HCl environment using gravimetric and linear polarization methods. The result shows that the extract inhibits the corrosion of aluminium by elongating the latency periods of the metal beyond in the absence of the inhibitor. The results from gravimetric measurements illustrate increase in inhibition efficiency with increment in extract concentration. Linear polarization plots show that the mode of inhibition was mixed type. The observed decrease in corrosion rate was due to adsorption of the extracts on the surface of the metal which obey the Langmuir adsorption isotherm. Adsorption of the extract depends on its chemical composition which showed the presence of various phytochemicals like flavonoids, steroids, tannins and phenolic compounds etc. which has oxygen atoms with lone pair electrons for co-ordinate bonding with metal.
