Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution

Collins Chibuzor Odidika; Vincent Ishmael Egbulefu Ajiwe; Charity Nkiruka Eboagu; Chiagozie Michael Ekwunife; Chioma Irene Awuzie

doi:doi:10.11648/j.sjac.20200802.18

Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H₂SO₄ Solution

Collins Chibuzor Odidika, Vincent Ishmael Egbulefu Ajiwe, Charity Nkiruka Eboagu, Chiagozie Michael Ekwunife, Chioma Irene Awuzie

Published in Science Journal of Analytical Chemistry (Volume 8, Issue 2)

Received: 30 April 2020 Accepted: 15 June 2020 Published: 28 June 2020

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Abstract

The corrosion inhibition of mild steel in 1M sulphuric acid solution by the ethanol extract of Commelina benghalensis (C. B) leaves was determined using gravimetric technique. Phytochemical analysis was carried out on the extract and the effect of extract concentration, temperature, immersion time and acid concentration on the corrosion process was determined. The corrosion inhibition efficiency of the extract increased with increase in the concentration of the extract and decreased with increase in temperature. Increase in temperature also increased the corrosion rate of mild steel in 1M sulphuric acid in the absence and presence of different concentrations of the extract. The adsorption of the plant extract obeyed Langmuir and Freundlich adsorption isotherms. The process of physical adsorption was proposed for the extract from the trends of inhibition efficiency with temperature and from calculated values of Gibbs free energy, activation energy and enthalpy of adsorption. Gibbs free energy values for the reactions were less than 20kJ/mol, indicating physical adsorption process and were also found to be negative, indicating that the adsorption process was spontaneous. The corrosion inhibition efficiency (% IE) of the plant extract was attributed to the phytochemical constituents (alkaloids, flavonoids, tannins, saponins, phenolics, steroids and cardiac glycosides) present in them. The results showed that Commelina benghalensis can serve as a good corrosion inhibitor of mild steel in acid medium, since it reached a corrosion inhibition efficiency (% IE) of 91.91% at 2.0g/L extract concentration.

Published in	Science Journal of Analytical Chemistry (Volume 8, Issue 2)
DOI	10.11648/j.sjac.20200802.18
Page(s)	86-92
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), 2020. Published by Science Publishing Group

Keywords

Commelina benghalensis, Mild Steel, Adsorption, Sulphuric Acid, Corrosion Inhibitor, Gravimetric Technique

References

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Collins Chibuzor Odidika, Vincent Ishmael Egbulefu Ajiwe, Charity Nkiruka Eboagu, Chiagozie Michael Ekwunife, Chioma Irene Awuzie. (2020). Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution. Science Journal of Analytical Chemistry, 8(2), 86-92. https://doi.org/10.11648/j.sjac.20200802.18

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ACS Style

Collins Chibuzor Odidika; Vincent Ishmael Egbulefu Ajiwe; Charity Nkiruka Eboagu; Chiagozie Michael Ekwunife; Chioma Irene Awuzie. Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution. Sci. J. Anal. Chem. 2020, 8(2), 86-92. doi: 10.11648/j.sjac.20200802.18

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AMA Style

Collins Chibuzor Odidika, Vincent Ishmael Egbulefu Ajiwe, Charity Nkiruka Eboagu, Chiagozie Michael Ekwunife, Chioma Irene Awuzie. Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution. Sci J Anal Chem. 2020;8(2):86-92. doi: 10.11648/j.sjac.20200802.18

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@article{10.11648/j.sjac.20200802.18,
  author = {Collins Chibuzor Odidika and Vincent Ishmael Egbulefu Ajiwe and Charity Nkiruka Eboagu and Chiagozie Michael Ekwunife and Chioma Irene Awuzie},
  title = {Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution},
  journal = {Science Journal of Analytical Chemistry},
  volume = {8},
  number = {2},
  pages = {86-92},
  doi = {10.11648/j.sjac.20200802.18},
  url = {https://doi.org/10.11648/j.sjac.20200802.18},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjac.20200802.18},
  abstract = {The corrosion inhibition of mild steel in 1M sulphuric acid solution by the ethanol extract of Commelina benghalensis (C. B) leaves was determined using gravimetric technique. Phytochemical analysis was carried out on the extract and the effect of extract concentration, temperature, immersion time and acid concentration on the corrosion process was determined. The corrosion inhibition efficiency of the extract increased with increase in the concentration of the extract and decreased with increase in temperature. Increase in temperature also increased the corrosion rate of mild steel in 1M sulphuric acid in the absence and presence of different concentrations of the extract. The adsorption of the plant extract obeyed Langmuir and Freundlich adsorption isotherms. The process of physical adsorption was proposed for the extract from the trends of inhibition efficiency with temperature and from calculated values of Gibbs free energy, activation energy and enthalpy of adsorption. Gibbs free energy values for the reactions were less than 20kJ/mol, indicating physical adsorption process and were also found to be negative, indicating that the adsorption process was spontaneous. The corrosion inhibition efficiency (% IE) of the plant extract was attributed to the phytochemical constituents (alkaloids, flavonoids, tannins, saponins, phenolics, steroids and cardiac glycosides) present in them. The results showed that Commelina benghalensis can serve as a good corrosion inhibitor of mild steel in acid medium, since it reached a corrosion inhibition efficiency (% IE) of 91.91% at 2.0g/L extract concentration.},
 year = {2020}
}

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TY  - JOUR
T1  - Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution
AU  - Collins Chibuzor Odidika
AU  - Vincent Ishmael Egbulefu Ajiwe
AU  - Charity Nkiruka Eboagu
AU  - Chiagozie Michael Ekwunife
AU  - Chioma Irene Awuzie
Y1  - 2020/06/28
PY  - 2020
N1  - https://doi.org/10.11648/j.sjac.20200802.18
DO  - 10.11648/j.sjac.20200802.18
T2  - Science Journal of Analytical Chemistry
JF  - Science Journal of Analytical Chemistry
JO  - Science Journal of Analytical Chemistry
SP  - 86
EP  - 92
PB  - Science Publishing Group
SN  - 2376-8053
UR  - https://doi.org/10.11648/j.sjac.20200802.18
AB  - The corrosion inhibition of mild steel in 1M sulphuric acid solution by the ethanol extract of Commelina benghalensis (C. B) leaves was determined using gravimetric technique. Phytochemical analysis was carried out on the extract and the effect of extract concentration, temperature, immersion time and acid concentration on the corrosion process was determined. The corrosion inhibition efficiency of the extract increased with increase in the concentration of the extract and decreased with increase in temperature. Increase in temperature also increased the corrosion rate of mild steel in 1M sulphuric acid in the absence and presence of different concentrations of the extract. The adsorption of the plant extract obeyed Langmuir and Freundlich adsorption isotherms. The process of physical adsorption was proposed for the extract from the trends of inhibition efficiency with temperature and from calculated values of Gibbs free energy, activation energy and enthalpy of adsorption. Gibbs free energy values for the reactions were less than 20kJ/mol, indicating physical adsorption process and were also found to be negative, indicating that the adsorption process was spontaneous. The corrosion inhibition efficiency (% IE) of the plant extract was attributed to the phytochemical constituents (alkaloids, flavonoids, tannins, saponins, phenolics, steroids and cardiac glycosides) present in them. The results showed that Commelina benghalensis can serve as a good corrosion inhibitor of mild steel in acid medium, since it reached a corrosion inhibition efficiency (% IE) of 91.91% at 2.0g/L extract concentration.
VL  - 8
IS  - 2
ER  -

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Author Information

Collins Chibuzor Odidika

Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria
Vincent Ishmael Egbulefu Ajiwe

Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria
Charity Nkiruka Eboagu

Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria
Chiagozie Michael Ekwunife

Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria
Chioma Irene Awuzie

Department of Science Laboratory Technology, Federal Polytechnic, Oko, Nigeria

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Collins Chibuzor Odidika, Vincent Ishmael Egbulefu Ajiwe, Charity Nkiruka Eboagu, Chiagozie Michael Ekwunife, Chioma Irene Awuzie. (2020). Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution. Science Journal of Analytical Chemistry, 8(2), 86-92. https://doi.org/10.11648/j.sjac.20200802.18

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ACS Style

Collins Chibuzor Odidika; Vincent Ishmael Egbulefu Ajiwe; Charity Nkiruka Eboagu; Chiagozie Michael Ekwunife; Chioma Irene Awuzie. Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution. Sci. J. Anal. Chem. 2020, 8(2), 86-92. doi: 10.11648/j.sjac.20200802.18

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AMA Style

Collins Chibuzor Odidika, Vincent Ishmael Egbulefu Ajiwe, Charity Nkiruka Eboagu, Chiagozie Michael Ekwunife, Chioma Irene Awuzie. Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution. Sci J Anal Chem. 2020;8(2):86-92. doi: 10.11648/j.sjac.20200802.18

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@article{10.11648/j.sjac.20200802.18,
  author = {Collins Chibuzor Odidika and Vincent Ishmael Egbulefu Ajiwe and Charity Nkiruka Eboagu and Chiagozie Michael Ekwunife and Chioma Irene Awuzie},
  title = {Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution},
  journal = {Science Journal of Analytical Chemistry},
  volume = {8},
  number = {2},
  pages = {86-92},
  doi = {10.11648/j.sjac.20200802.18},
  url = {https://doi.org/10.11648/j.sjac.20200802.18},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjac.20200802.18},
  abstract = {The corrosion inhibition of mild steel in 1M sulphuric acid solution by the ethanol extract of Commelina benghalensis (C. B) leaves was determined using gravimetric technique. Phytochemical analysis was carried out on the extract and the effect of extract concentration, temperature, immersion time and acid concentration on the corrosion process was determined. The corrosion inhibition efficiency of the extract increased with increase in the concentration of the extract and decreased with increase in temperature. Increase in temperature also increased the corrosion rate of mild steel in 1M sulphuric acid in the absence and presence of different concentrations of the extract. The adsorption of the plant extract obeyed Langmuir and Freundlich adsorption isotherms. The process of physical adsorption was proposed for the extract from the trends of inhibition efficiency with temperature and from calculated values of Gibbs free energy, activation energy and enthalpy of adsorption. Gibbs free energy values for the reactions were less than 20kJ/mol, indicating physical adsorption process and were also found to be negative, indicating that the adsorption process was spontaneous. The corrosion inhibition efficiency (% IE) of the plant extract was attributed to the phytochemical constituents (alkaloids, flavonoids, tannins, saponins, phenolics, steroids and cardiac glycosides) present in them. The results showed that Commelina benghalensis can serve as a good corrosion inhibitor of mild steel in acid medium, since it reached a corrosion inhibition efficiency (% IE) of 91.91% at 2.0g/L extract concentration.},
 year = {2020}
}

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TY  - JOUR
T1  - Corrosion Inhibition and Adsorption Properties of Commelina benghalensis Leaves Extract on Mild Steel in 1M H2SO4 Solution
AU  - Collins Chibuzor Odidika
AU  - Vincent Ishmael Egbulefu Ajiwe
AU  - Charity Nkiruka Eboagu
AU  - Chiagozie Michael Ekwunife
AU  - Chioma Irene Awuzie
Y1  - 2020/06/28
PY  - 2020
N1  - https://doi.org/10.11648/j.sjac.20200802.18
DO  - 10.11648/j.sjac.20200802.18
T2  - Science Journal of Analytical Chemistry
JF  - Science Journal of Analytical Chemistry
JO  - Science Journal of Analytical Chemistry
SP  - 86
EP  - 92
PB  - Science Publishing Group
SN  - 2376-8053
UR  - https://doi.org/10.11648/j.sjac.20200802.18
AB  - The corrosion inhibition of mild steel in 1M sulphuric acid solution by the ethanol extract of Commelina benghalensis (C. B) leaves was determined using gravimetric technique. Phytochemical analysis was carried out on the extract and the effect of extract concentration, temperature, immersion time and acid concentration on the corrosion process was determined. The corrosion inhibition efficiency of the extract increased with increase in the concentration of the extract and decreased with increase in temperature. Increase in temperature also increased the corrosion rate of mild steel in 1M sulphuric acid in the absence and presence of different concentrations of the extract. The adsorption of the plant extract obeyed Langmuir and Freundlich adsorption isotherms. The process of physical adsorption was proposed for the extract from the trends of inhibition efficiency with temperature and from calculated values of Gibbs free energy, activation energy and enthalpy of adsorption. Gibbs free energy values for the reactions were less than 20kJ/mol, indicating physical adsorption process and were also found to be negative, indicating that the adsorption process was spontaneous. The corrosion inhibition efficiency (% IE) of the plant extract was attributed to the phytochemical constituents (alkaloids, flavonoids, tannins, saponins, phenolics, steroids and cardiac glycosides) present in them. The results showed that Commelina benghalensis can serve as a good corrosion inhibitor of mild steel in acid medium, since it reached a corrosion inhibition efficiency (% IE) of 91.91% at 2.0g/L extract concentration.
VL  - 8
IS  - 2
ER  -

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