Inhibition of mild steel corrosion using Jatropha Curcas leaf extract
Jatropha Curcas leaf was investigated as a green inhibitor on the degradation of mild steel in 4 M HCl and 4 M H2SO4 aqueous solutions using gasometric technique. Mild steel coupons of dimension 2 × 1.5 cm were immersed in test solutions of uninhibited acid and also those with extract concentration...
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International Association of Physical Chemists (IAPC)
2014-05-01
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doaj-03445b59962d4d589fc597f6948608e42020-11-24T22:45:28ZengInternational Association of Physical Chemists (IAPC)Journal of Electrochemical Science and Engineering1847-92861847-92862014-05-0142677410.5599/jese.2014.0046Inhibition of mild steel corrosion using Jatropha Curcas leaf extractOLORUNFEMI MICHAEL AJAYI0JAMIU KOLAWOLE ODUSOTE1RAHEEM ABOLORE YAHYA2Department of Mechanical Engineering, University of Ilorin, Ilorin, NigeriaDepartment of Materials and Metallurgical Engineering, University of Ilorin, Ilorin, NigeriaDepartment of Materials and Metallurgical Engineering, University of Ilorin, Ilorin, Nigeria Jatropha Curcas leaf was investigated as a green inhibitor on the degradation of mild steel in 4 M HCl and 4 M H2SO4 aqueous solutions using gasometric technique. Mild steel coupons of dimension 2 × 1.5 cm were immersed in test solutions of uninhibited acid and also those with extract concentrations of 4 ml, 6 ml, 8 ml and 10 ml at 30 oC, for up to 30 minutes. The results showed that as the concentration of the extract increases, there was reduction in the corrosion rate. As the extract concentration increased from 4 ml to 10 ml at 30 minutes exposure, the volume of hydrogen gas evolved decreased from 19.1 cm3 to 11.2 cm3 in H2SO4 medium, while it reduced to 5 cm3 from 9 cm3 in HCl medium. Also, the metal surface-phytoconstituent interaction mechanism showed that 6 minutes is the best exposure time for the adsorption of the extract in both acidic media. The Jatropha Curcas leaf extract was adsorbed on the mild steel surface to inhibit corrosion, while the experimental data obtained at 30 minutes exposure in both acidic media were well fitted with the Langmuir adsorption isotherm. Hence, Jatropha Curcas leaf extract is a good and safe inhibitor in both acidic solutions.http://www.jese-online.org/Articles/Vol_04/No_2/pdf/jESE_Vol4_No2_p67-74_2014.pdfGasometricInhibitoradsorptionmild steelLangmuir isotherm |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
OLORUNFEMI MICHAEL AJAYI JAMIU KOLAWOLE ODUSOTE RAHEEM ABOLORE YAHYA |
spellingShingle |
OLORUNFEMI MICHAEL AJAYI JAMIU KOLAWOLE ODUSOTE RAHEEM ABOLORE YAHYA Inhibition of mild steel corrosion using Jatropha Curcas leaf extract Journal of Electrochemical Science and Engineering Gasometric Inhibitor adsorption mild steel Langmuir isotherm |
author_facet |
OLORUNFEMI MICHAEL AJAYI JAMIU KOLAWOLE ODUSOTE RAHEEM ABOLORE YAHYA |
author_sort |
OLORUNFEMI MICHAEL AJAYI |
title |
Inhibition of mild steel corrosion using Jatropha Curcas leaf extract |
title_short |
Inhibition of mild steel corrosion using Jatropha Curcas leaf extract |
title_full |
Inhibition of mild steel corrosion using Jatropha Curcas leaf extract |
title_fullStr |
Inhibition of mild steel corrosion using Jatropha Curcas leaf extract |
title_full_unstemmed |
Inhibition of mild steel corrosion using Jatropha Curcas leaf extract |
title_sort |
inhibition of mild steel corrosion using jatropha curcas leaf extract |
publisher |
International Association of Physical Chemists (IAPC) |
series |
Journal of Electrochemical Science and Engineering |
issn |
1847-9286 1847-9286 |
publishDate |
2014-05-01 |
description |
Jatropha Curcas leaf was investigated as a green inhibitor on the degradation of mild steel in 4 M HCl and 4 M H2SO4 aqueous solutions using gasometric technique. Mild steel coupons of dimension 2 × 1.5 cm were immersed in test solutions of uninhibited acid and also those with extract concentrations of 4 ml, 6 ml, 8 ml and 10 ml at 30 oC, for up to 30 minutes. The results showed that as the concentration of the extract increases, there was reduction in the corrosion rate. As the extract concentration increased from 4 ml to 10 ml at 30 minutes exposure, the volume of hydrogen gas evolved decreased from 19.1 cm3 to 11.2 cm3 in H2SO4 medium, while it reduced to 5 cm3 from 9 cm3 in HCl medium. Also, the metal surface-phytoconstituent interaction mechanism showed that 6 minutes is the best exposure time for the adsorption of the extract in both acidic media. The Jatropha Curcas leaf extract was adsorbed on the mild steel surface to inhibit corrosion, while the experimental data obtained at 30 minutes exposure in both acidic media were well fitted with the Langmuir adsorption isotherm. Hence, Jatropha Curcas leaf extract is a good and safe inhibitor in both acidic solutions. |
topic |
Gasometric Inhibitor adsorption mild steel Langmuir isotherm |
url |
http://www.jese-online.org/Articles/Vol_04/No_2/pdf/jESE_Vol4_No2_p67-74_2014.pdf |
work_keys_str_mv |
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