Corrosion Inhibition of Mild Steel in Seawater using Jatropha Stem

Adediran, A.A (2016) Corrosion Inhibition of Mild Steel in Seawater using Jatropha Stem. “EFTIMIE MURGU” REŞIŢA, XXIII (1). pp. 228-238. ISSN ISSN 1453 - 7397

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Abstract

The present work investigates the inhibition of Jatropha Stem Extract (JSE) in sea water using mild steel coupons of dimension 5 × 5 × 0.5 cm. The cupons were immersed in test solutions of sea water and varied concentrations of extracts of 0.1g/l to 0.9g/l were used. The functional groups of the compounds were analyzed using an FTIR. The results showed that as the concentration of the extract increases, there was a reduction in the corrosion rates. Furthermore, as the extract concentrations increased from 0.1g/l to 0.4g/l at 48hrs exposure time, the weight loss decreased by 14.3% in the medium. However, the Jatropha Stem Extract was absorbed on the substrate surface to inhibit corrosion, the morphology of phases formed from the scanning Electron Microscopy examination confirmed this trend. Hence, JSE is a good and safe inhibitor in sea water solution. The FT-IR results also indicate the presence of active corrosion inhibitor present in the Jatropha Stem.

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