Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel

Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel

Aqueous extracts of the leaves of Anthocleista djalonesis (AD) have been investigated as non toxic corrosion inhibitors for mild steel in acidic environments (1 M HCl and 0.5 M H2SO4, respectively). Corrosion rates were evaluated at 30 °C using the weight loss, electrochemical impedance spectroscopy and potentiodynamic polarization techniques. AD extract was found to inhibit mild steel corrosion in both acidic media via adsorption of the extract organic matter on the metal/solution interface. Polarization data indicate that the extract functioned via a mixed inhibition mechanism, affecting both the cathodic and anodic partial reactions of the corrosion process. Molecular dynamics (MD) simulations were performed to illustrate the adsorption process of some specific components of the extract.

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Main Authors: Ogukwe,C.E., Akalezi,C.O., Chidiebere,M. A., Oguzie,K.L., Iheabunike,Z.O., Oguziea,E.E.
Format: Digital revista
Language:English
Published: Sociedade Portuguesa de Electroquímica 2012
Online Access:http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042012000300004
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spelling oai:scielo:S0872-190420120003000042013-04-05Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild SteelOgukwe,C.E.Akalezi,C.O.Chidiebere,M. A.Oguzie,K.L.Iheabunike,Z.O.Oguziea,E.E. corrosion inhibition biomass extract Anthocleista djalonesis adsorption molecular dynamics simulations Aqueous extracts of the leaves of Anthocleista djalonesis (AD) have been investigated as non toxic corrosion inhibitors for mild steel in acidic environments (1 M HCl and 0.5 M H2SO4, respectively). Corrosion rates were evaluated at 30 °C using the weight loss, electrochemical impedance spectroscopy and potentiodynamic polarization techniques. AD extract was found to inhibit mild steel corrosion in both acidic media via adsorption of the extract organic matter on the metal/solution interface. Polarization data indicate that the extract functioned via a mixed inhibition mechanism, affecting both the cathodic and anodic partial reactions of the corrosion process. Molecular dynamics (MD) simulations were performed to illustrate the adsorption process of some specific components of the extract.info:eu-repo/semantics/openAccessSociedade Portuguesa de ElectroquímicaPortugaliae Electrochimica Acta v.30 n.3 20122012-05-01info:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042012000300004en10.4152/pea.201203189
institution SCIELO
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country Portugal
countrycode PT
component Revista
access En linea
databasecode rev-scielo-pt
tag revista
region Europa del Sur
libraryname SciELO
language English
format Digital
author Ogukwe,C.E.
Akalezi,C.O.
Chidiebere,M. A.
Oguzie,K.L.
Iheabunike,Z.O.
Oguziea,E.E.
spellingShingle Ogukwe,C.E.
Akalezi,C.O.
Chidiebere,M. A.
Oguzie,K.L.
Iheabunike,Z.O.
Oguziea,E.E.
Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel
author_facet Ogukwe,C.E.
Akalezi,C.O.
Chidiebere,M. A.
Oguzie,K.L.
Iheabunike,Z.O.
Oguziea,E.E.
author_sort Ogukwe,C.E.
title Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel
title_short Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel
title_full Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel
title_fullStr Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel
title_full_unstemmed Corrosion Inhibition and Adsorption of Anthocleista Djalonesis Leaf Extract on the Acid Corrosion of Mild Steel
title_sort corrosion inhibition and adsorption of anthocleista djalonesis leaf extract on the acid corrosion of mild steel
description Aqueous extracts of the leaves of Anthocleista djalonesis (AD) have been investigated as non toxic corrosion inhibitors for mild steel in acidic environments (1 M HCl and 0.5 M H2SO4, respectively). Corrosion rates were evaluated at 30 °C using the weight loss, electrochemical impedance spectroscopy and potentiodynamic polarization techniques. AD extract was found to inhibit mild steel corrosion in both acidic media via adsorption of the extract organic matter on the metal/solution interface. Polarization data indicate that the extract functioned via a mixed inhibition mechanism, affecting both the cathodic and anodic partial reactions of the corrosion process. Molecular dynamics (MD) simulations were performed to illustrate the adsorption process of some specific components of the extract.
publisher Sociedade Portuguesa de Electroquímica
publishDate 2012
url http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042012000300004
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