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Article – Journal of Advanced Electrochemistry

Journal of Advanced Electrochemistry, Volume 2,Issue 1,2016 Pages 50-55

A Study of The Green Corrosion Inhibition of Acacia tortilis Extract on Mild Steel-Sulphuric Acid Environment
I.Y. Suleiman, M. Abdulwahab*, F.E. Awe

Studies was made on the effect of plant extract, Umbrella Thorn (Acacia tortilis) with mild steel using gravimetric and electrochemical corrosion techniques in 0.5 M H2SO4. Scanning electron microscope equipped with energy dispersive spectroscopy (SEM/EDS) was used to analyze the surface morphology of the sample. Linear regression equation and analysis of variance (ANOVA) were employed to investigate the influence of process parameters on the corrosion rate of the samples. From the result, corrosion rate increased with increase in temperature and decreased with increase in both inhibitor concentration and time. The maximum inhibition efficiency was 93.19% and 97.54% in the presence of KI addition. The adsorption of the molecules of the extract on the mild steel surface obeyed the Langmuir adsorption isotherm. The potentiodynamic polarization results showed that the green inhibitor acted as mixed-type inhibitor. The results from ANOVA showed that temperature, inhibitor concentration and time are statistically significant.

Keywords: Acacia tortilis; Langmuir Isotherm; Mild Steel; Linear Regression;