Corrosion Inhibition of Mild Steel in 0.5 M H2SO4 Using Ethanol Extract of Funtumia elastica

Adindu, Chinonso Blessing; Oguzie, Emeka Emmanuel; Ogukwe, Cynthia E.

doi:10.18052/www.scipress.com/ILCPA.68.24

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Corrosion Inhibition of Mild Steel in 0.5 M H₂SO₄ Using Ethanol Extract of Funtumia elastica

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Abstract:

The adsorption and corrosion inhibitive effect of the ethanol extract of Funtumia elastica (FE) leaves on mild steel corrosion in 0.5 M H₂SO₄ was studied using gravimetric, potentiodynamic polarization and electrochemical impedance spectroscopic techniques. As well as Fourier transform infrared spectroscopy and computational methods. The gravimetric and electrochemical studies revealed that FE is an adsorption inhibitor. The potentiodynamic polarization result showed that the inhibitor is a mixed type corrosion inhibitor for mild steel in 0.5 M H₂SO₄, inhibiting both the cathodic and anodic partial reactions. Density functional theory calculations were performed to model the electronic structures of some selected extract constituents (conessine, and ascorbic acid) to conﬁrm their inhibiting potential and established their individual contributions to the observed inhibiting effects.

Info:

Periodical:

International Letters of Chemistry, Physics and Astronomy (Volume 68)

Pages:

24-38

DOI:

https://doi.org/10.18052/www.scipress.com/ILCPA.68.24

Citation:

C. B. Adindu et al., "Corrosion Inhibition of Mild Steel in 0.5 M H₂SO₄ Using Ethanol Extract of Funtumia elastica", International Letters of Chemistry, Physics and Astronomy, Vol. 68, pp. 24-38, 2016

Online since:

July 2016

Authors:

Chinonso Blessing Adindu, Emeka Emmanuel Oguzie, Cynthia E. Ogukwe

Keywords:

Adsorption, Corrosion, Corrosion Inhibition, Density Functional Theory, Funtumia elastica, Mild Steel

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Open Access

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Creative Commons Attribution 4.0 International License

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