Corrosion Inhibition of Mild Steel in 0.1M H2SO4 Solution by Anacardium occidentale Gum
David E. Arthur, Adebiyi Adedayo, Gerald Igelige, Edwin Ogwuche
Chemical Science International Journal · pp. 847–854 · Published 9 Jul 2014
10.9734/ACSJ/2014/9499Abstract
The corrosion inhibition of mild steel is of technological importance due to the increase of industrial requirements. This study reports the corrosion inhibition of mild steel in acidic solution of 0.1 M H2SO4 using Anarcadium occidentale gum, also known as Cashew gum by way of gravimetric measurements. It was shown that the presence of cashew gum inhibited the corrosion of mild steel in the test solution and the inhibition efficiency increased with increase in concentration of the gum, hence it’s depended on the concentration of the plant extract as well as on the time of exposure of the mild steel samples in H2SO4 solutions containing the extract. The experimental data complied with the Langmuir adsorption isotherm. The results obtained authenticate that cashew gum is a good corrosion inhibitor and the adsorption mechanism is physisorption.
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