The corrosion inhibitive effect of Urena lobata leaves extract on mild steel in 1M HCl solution was investigated via gravimetric, Electrochemical and Surface analyses. Adsorption isotherms were investigated using the Langmuir and Freundlich plots. Phytochemicals of the extract were investigated using Gas Chromatography-Mass Spectrometric (GC-MS) technique. The effect of the leaves extract through immersion time, temperature and concentration on the corrosion inhibition were obtained. The results obtained showed that the increase in extract’s concentration increased the inhibition efficiency and the protection was more on the surface of the metal at lower temperature. Maximum inhibition efficiency of 95.8% was obtained at 2.5g/L extract concentration. Corrosion rate of mild steel increased with temperature increase in the acidic solution. The adsorption process reduced as temperature increased thereby indicating physisorption. The Langmuir isotherms gave the best fit indicating chemisorption. Physical adsorption was confirmed for the leaves extract from observations of inhibition efficiency with temperature, activation energy and enthalpy of adsorption values. Hence indicating that the plant extract has mixed properties. The electrochemical results confirmed the inhibitory ability of the plant extract. The inhibition efficiencies (% IE) were attributed to the phytochemical components (alkaloids, saponins, flavonoids, tannins, cynagenic glycosides) present in the extract. The extracts of Urena lobata are effective corrosion inhibitors of mild steel.
| Published in | American Journal of Physical Chemistry (Volume 13, Issue 1) |
| DOI | 10.11648/j.ajpc.20241301.13 |
| Page(s) | 17-27 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Urena Lobata, Inhibition Efficiency, Corrosion Inhibitors, Corrosion Rate, Mild Steel
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APA Style
Barineka, Z. K., Maduelosi, N. J., Umoh, E. T. (2024). Experimental Study on Adsorption and Corrosion Inhibition Properties of Urena lobata Leaves Extract on Mild Steel in Acidic Medium. American Journal of Physical Chemistry, 13(1), 17-27. https://doi.org/10.11648/j.ajpc.20241301.13
ACS Style
Barineka, Z. K.; Maduelosi, N. J.; Umoh, E. T. Experimental Study on Adsorption and Corrosion Inhibition Properties of Urena lobata Leaves Extract on Mild Steel in Acidic Medium. Am. J. Phys. Chem. 2024, 13(1), 17-27. doi: 10.11648/j.ajpc.20241301.13
AMA Style
Barineka ZK, Maduelosi NJ, Umoh ET. Experimental Study on Adsorption and Corrosion Inhibition Properties of Urena lobata Leaves Extract on Mild Steel in Acidic Medium. Am J Phys Chem. 2024;13(1):17-27. doi: 10.11648/j.ajpc.20241301.13
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Download@article{10.11648/j.ajpc.20241301.13,
author = {Zorbari Kelvin Barineka and Ngozi Jane Maduelosi and Enobong Thompson Umoh},
title = {Experimental Study on Adsorption and Corrosion Inhibition Properties of Urena lobata Leaves Extract on Mild Steel in Acidic Medium},
journal = {American Journal of Physical Chemistry},
volume = {13},
number = {1},
pages = {17-27},
doi = {10.11648/j.ajpc.20241301.13},
url = {https://doi.org/10.11648/j.ajpc.20241301.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpc.20241301.13},
abstract = {The corrosion inhibitive effect of Urena lobata leaves extract on mild steel in 1M HCl solution was investigated via gravimetric, Electrochemical and Surface analyses. Adsorption isotherms were investigated using the Langmuir and Freundlich plots. Phytochemicals of the extract were investigated using Gas Chromatography-Mass Spectrometric (GC-MS) technique. The effect of the leaves extract through immersion time, temperature and concentration on the corrosion inhibition were obtained. The results obtained showed that the increase in extract’s concentration increased the inhibition efficiency and the protection was more on the surface of the metal at lower temperature. Maximum inhibition efficiency of 95.8% was obtained at 2.5g/L extract concentration. Corrosion rate of mild steel increased with temperature increase in the acidic solution. The adsorption process reduced as temperature increased thereby indicating physisorption. The Langmuir isotherms gave the best fit indicating chemisorption. Physical adsorption was confirmed for the leaves extract from observations of inhibition efficiency with temperature, activation energy and enthalpy of adsorption values. Hence indicating that the plant extract has mixed properties. The electrochemical results confirmed the inhibitory ability of the plant extract. The inhibition efficiencies (% IE) were attributed to the phytochemical components (alkaloids, saponins, flavonoids, tannins, cynagenic glycosides) present in the extract. The extracts of Urena lobata are effective corrosion inhibitors of mild steel.
},
year = {2024}
}
TY - JOUR T1 - Experimental Study on Adsorption and Corrosion Inhibition Properties of Urena lobata Leaves Extract on Mild Steel in Acidic Medium AU - Zorbari Kelvin Barineka AU - Ngozi Jane Maduelosi AU - Enobong Thompson Umoh Y1 - 2024/03/13 PY - 2024 N1 - https://doi.org/10.11648/j.ajpc.20241301.13 DO - 10.11648/j.ajpc.20241301.13 T2 - American Journal of Physical Chemistry JF - American Journal of Physical Chemistry JO - American Journal of Physical Chemistry SP - 17 EP - 27 PB - Science Publishing Group SN - 2327-2449 UR - https://doi.org/10.11648/j.ajpc.20241301.13 AB - The corrosion inhibitive effect of Urena lobata leaves extract on mild steel in 1M HCl solution was investigated via gravimetric, Electrochemical and Surface analyses. Adsorption isotherms were investigated using the Langmuir and Freundlich plots. Phytochemicals of the extract were investigated using Gas Chromatography-Mass Spectrometric (GC-MS) technique. The effect of the leaves extract through immersion time, temperature and concentration on the corrosion inhibition were obtained. The results obtained showed that the increase in extract’s concentration increased the inhibition efficiency and the protection was more on the surface of the metal at lower temperature. Maximum inhibition efficiency of 95.8% was obtained at 2.5g/L extract concentration. Corrosion rate of mild steel increased with temperature increase in the acidic solution. The adsorption process reduced as temperature increased thereby indicating physisorption. The Langmuir isotherms gave the best fit indicating chemisorption. Physical adsorption was confirmed for the leaves extract from observations of inhibition efficiency with temperature, activation energy and enthalpy of adsorption values. Hence indicating that the plant extract has mixed properties. The electrochemical results confirmed the inhibitory ability of the plant extract. The inhibition efficiencies (% IE) were attributed to the phytochemical components (alkaloids, saponins, flavonoids, tannins, cynagenic glycosides) present in the extract. The extracts of Urena lobata are effective corrosion inhibitors of mild steel. VL - 13 IS - 1 ER -
Department of Chemistry, Rivers State University, Port Harcourt, Nigeria
