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

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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[6] Odidika, C. C., Ajiwe, V. I. E., Eboagu, N. C., and Awuzie, C. I., (2020). Corrosion inhibitive action of Euphorbia heterophylla leaves extract on mild steel in 1 M H2SO4 solution. Open Science Journal of Analytical Chemistry. 5 (1): 1-8.
[7] Udensi, S. C., Ekpe, O. E., and Nnanna, L. A., (2020). Newbouldia laevis leaves extract as tenable eco-friendly corrosion inhibitor for aluminium alloy AA7075-T7351 in 1 M HCL corrosive environment: Gravimetric, electrochemical and thermodynamic studies. Chemistry Africa. 3: 303-316.
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[9] Ishak, A., Adams, F. V., Madu, J. O., Joseph, I. V., and Olubambi, P. A., (2019). Corrosion inhibition of mild steel in 1 M hydrochloric acid using Haematostaphis barteri leaves extract. Procedia Manufacturing. 35: 1279-1285.
[10] Singh, M. R., Gupta, P., and Gupta, K., (2019). The Litchi (Litchi Chinensis) peels extract as a potential green inhibitor in prevention of corrosion of mild steel in 0.5 M H2SO4 solution. Arabian Journal of Chemistry 12 (7): 1035-1041.
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[15] Vasudha V. G. and Shanmuga P. K. (2014) “Corrosion inhib ition of mild steel in H2SO4 media using Polyalthialongifolia leaves, Chemical Science Revision Letters, 2 (6): 435-443.
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Cite This Article
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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
  • Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria

  • Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria

  • Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria

  • Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University, Awka, Nigeria

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

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