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Corrosion Inhibition of Mild Steel in Sesamum indicum -2M HCl/H2SO4 Interface

Popoola, A. P. I. and Abdulwahab, M and Fayomi, O. S. I (2012) Corrosion Inhibition of Mild Steel in Sesamum indicum -2M HCl/H2SO4 Interface. International Journal of ELECTROCHEMICAL SCIENCE, 7. 5805- 5816.

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The corrosion inhibition of mild steel in 2M HCl and H2SO4 solution with natural Sesamum indicum of varying concentrations have been studied using gravimetric and linear polarization techniques. The surface morphology of as-corroded samples was assessed with scanning electron microscopy equipped with energy dispersive spectroscopy (SEM-EDS). From the results obtained, the corrosion rate decreased with Sesamum indicum concentrations in both environments investigated. Inhibitor efficiency of 85.74, 84.99 and 71.61% were obtained at 50/50/100%v/v Sesamum indicum addition in 2M HCl solution for 12, 24 and 36 h exposure time respectively. While at 20%v/v Sesame indicum addition, 98.04, 97.60 and 97.46% inhibitor efficiency in 2M H2SO4 solution for 12, 36 and 24 h exposure time were obtained respectively using gravimetric method. Results from the linear polarization technique indicate higher potential value with an increase in the polarization resistance (Rp) and lower current density for the inhibited samples than the uninhibited mild steel as obtained from the Tafel plot corrosion rate analysis. Equally, the two methods used for the corrosion evaluation of mild steel/Sesamum indicum in HCl and H2SO4 were in agreement

Item Type: Article
Uncontrolled Keywords: Sesamum indicum, Inhibitor efficiency, SEM-EDS, passivation, interface
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 29 Sep 2017 12:11
Last Modified: 29 Sep 2017 12:11

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