Inhibition of cashew juice on the corrosion of mild steel in sulphuric acid

THE INHIBITION of juice extracts of cashews (Anacardium Occidentale) on the corrosion of mild steel test specimens immersed in 0.5M H₂SO₄ at ambient temperature was evaluated. The weight-loss method and potential-measurement technique were used for the experimental work. The juice was obtained from the bark, apples, and nuts of the tree: the bark juice extract provided a fairly good inhibition performance at a concentration of only 0.5ml juice per 100ml of acid; the nut juice extract, at all concentrations used, provided very minimal corrosion inhibition of the test specimen in the acid; the cashew apple juice gave more-than-average performance of inhibition of the test specimen at all the concentrations used.