Corrosion, which has become a menace to humans and the society is a subject of concern especially in the food and pharmaceutical industries. Research in mitigating corrosion has generated lots of interests especially in the development of organic inhibitors such as potato peels, siam weeds, harmal leaves, with promising results. This work investigated the potentials of the leaves of Editan (Lasienthera Africanum) extract for use in formulating inhibitor in corrosion prevention of Aluminum alloys. The leave was subjected to phytochemical screening, Characterization was done using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) for the protective layer and the extracts respectively. Corrosion test using gravimetric measurement on Al-Si-Mg alloy coupon in 3.5% NaCl solution was investigated. The result obtained showed that Lasienthera Africanum contains phytochemical properties of terpenoids, saponin, alkaloids, glycosides, tannins. The inhibitor efficiency was found to improve with increase in inhibitor concentration. Inhibition efficiency for Editan was obtained to be 100% at high concentration of extract (5v/v%), obtained at a temperature of 303 K The results have confirmed that the leave extract of Editan is a good inhibitor against corrosion inaluminum alloys.

Keywords : Editan (Lasienthera Africanum) Al-Si-Mg, Gravimeric, Seawater.