American Journal of Materials Synthesis and Processing

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Studies on Thermal Stability, Shelf Life and Electrochemical Measurement of Methanol Extract of Air Dried Alchornea Laxiflora Leaves in Corrosion Prevention

Received: Jul. 25, 2019    Accepted: Sep. 05, 2019    Published: Nov. 22, 2019
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Abstract

The aim of this study was to determine the thermal stability and shelf life of the extract together with the influence of extract concentration, temperature and pH variation of the acidic medium on the inhibition efficiency using 1.0 M Sodium hydroxide. The dried plant samples were ground, sieved using 0.25µm and then extracted with methanol using maceration method. The phytochemical constituents were analyzed using appropriate methods. The phytochemicals detected were: Alkaloid, saponin, flavnoid, tannin, terpenoid, steroid and cardiac glycoside. Weight loss experiment was performed to ascertain the stability and shelf life of the extract at different storage temperature and time respectively while polarization experiment was used to study the behaviour of the extract on mild steel corrosion at varying concentration of the extract, pH and temperature of the acidic media. It was found that the stability of the extract inhibition efficiency was affected by the mode of storage and the inhibition efficiency decreases with increase in storage temperature of the extract. The life span of the extract was found to be 60 days from its production stage, after this, there was reduction in the inhibition efficiency of the extract. Moreso, the corrosion rate of the mild steel in 1.0 M HCl, monitored by electrochemical measurement revealed that the corrosion rate decreases with increase in the pH, decrease in temperature and increase in concentration of the extract in the acidic solution.

DOI 10.11648/j.ajmsp.20190402.13
Published in American Journal of Materials Synthesis and Processing ( Volume 4, Issue 2, December 2019 )
Page(s) 68-74
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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

Keywords

Phytochemicals, Storage Temperature, Shelf Life, Solution pH

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    Oluwafemi Lawrence Adebayo, Emmanuel Folorunso Olasehinde, Labunmi Lajide, Daniel Oloruntoba, Morenike Grace Ajayi. (2019). Studies on Thermal Stability, Shelf Life and Electrochemical Measurement of Methanol Extract of Air Dried Alchornea Laxiflora Leaves in Corrosion Prevention. American Journal of Materials Synthesis and Processing, 4(2), 68-74. https://doi.org/10.11648/j.ajmsp.20190402.13

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    ACS Style

    Oluwafemi Lawrence Adebayo; Emmanuel Folorunso Olasehinde; Labunmi Lajide; Daniel Oloruntoba; Morenike Grace Ajayi. Studies on Thermal Stability, Shelf Life and Electrochemical Measurement of Methanol Extract of Air Dried Alchornea Laxiflora Leaves in Corrosion Prevention. Am. J. Mater. Synth. Process. 2019, 4(2), 68-74. doi: 10.11648/j.ajmsp.20190402.13

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    AMA Style

    Oluwafemi Lawrence Adebayo, Emmanuel Folorunso Olasehinde, Labunmi Lajide, Daniel Oloruntoba, Morenike Grace Ajayi. Studies on Thermal Stability, Shelf Life and Electrochemical Measurement of Methanol Extract of Air Dried Alchornea Laxiflora Leaves in Corrosion Prevention. Am J Mater Synth Process. 2019;4(2):68-74. doi: 10.11648/j.ajmsp.20190402.13

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  • @article{10.11648/j.ajmsp.20190402.13,
      author = {Oluwafemi Lawrence Adebayo and Emmanuel Folorunso Olasehinde and Labunmi Lajide and Daniel Oloruntoba and Morenike Grace Ajayi},
      title = {Studies on Thermal Stability, Shelf Life and Electrochemical Measurement of Methanol Extract of Air Dried Alchornea Laxiflora Leaves in Corrosion Prevention},
      journal = {American Journal of Materials Synthesis and Processing},
      volume = {4},
      number = {2},
      pages = {68-74},
      doi = {10.11648/j.ajmsp.20190402.13},
      url = {https://doi.org/10.11648/j.ajmsp.20190402.13},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajmsp.20190402.13},
      abstract = {The aim of this study was to determine the thermal stability and shelf life of the extract together with the influence of extract concentration, temperature and pH variation of the acidic medium on the inhibition efficiency using 1.0 M Sodium hydroxide. The dried plant samples were ground, sieved using 0.25µm and then extracted with methanol using maceration method. The phytochemical constituents were analyzed using appropriate methods. The phytochemicals detected were: Alkaloid, saponin, flavnoid, tannin, terpenoid, steroid and cardiac glycoside. Weight loss experiment was performed to ascertain the stability and shelf life of the extract at different storage temperature and time respectively while polarization experiment was used to study the behaviour of the extract on mild steel corrosion at varying concentration of the extract, pH and temperature of the acidic media. It was found that the stability of the extract inhibition efficiency was affected by the mode of storage and the inhibition efficiency decreases with increase in storage temperature of the extract. The life span of the extract was found to be 60 days from its production stage, after this, there was reduction in the inhibition efficiency of the extract. Moreso, the corrosion rate of the mild steel in 1.0 M HCl, monitored by electrochemical measurement revealed that the corrosion rate decreases with increase in the pH, decrease in temperature and increase in concentration of the extract in the acidic solution.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Studies on Thermal Stability, Shelf Life and Electrochemical Measurement of Methanol Extract of Air Dried Alchornea Laxiflora Leaves in Corrosion Prevention
    AU  - Oluwafemi Lawrence Adebayo
    AU  - Emmanuel Folorunso Olasehinde
    AU  - Labunmi Lajide
    AU  - Daniel Oloruntoba
    AU  - Morenike Grace Ajayi
    Y1  - 2019/11/22
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    N1  - https://doi.org/10.11648/j.ajmsp.20190402.13
    DO  - 10.11648/j.ajmsp.20190402.13
    T2  - American Journal of Materials Synthesis and Processing
    JF  - American Journal of Materials Synthesis and Processing
    JO  - American Journal of Materials Synthesis and Processing
    SP  - 68
    EP  - 74
    PB  - Science Publishing Group
    SN  - 2575-1530
    UR  - https://doi.org/10.11648/j.ajmsp.20190402.13
    AB  - The aim of this study was to determine the thermal stability and shelf life of the extract together with the influence of extract concentration, temperature and pH variation of the acidic medium on the inhibition efficiency using 1.0 M Sodium hydroxide. The dried plant samples were ground, sieved using 0.25µm and then extracted with methanol using maceration method. The phytochemical constituents were analyzed using appropriate methods. The phytochemicals detected were: Alkaloid, saponin, flavnoid, tannin, terpenoid, steroid and cardiac glycoside. Weight loss experiment was performed to ascertain the stability and shelf life of the extract at different storage temperature and time respectively while polarization experiment was used to study the behaviour of the extract on mild steel corrosion at varying concentration of the extract, pH and temperature of the acidic media. It was found that the stability of the extract inhibition efficiency was affected by the mode of storage and the inhibition efficiency decreases with increase in storage temperature of the extract. The life span of the extract was found to be 60 days from its production stage, after this, there was reduction in the inhibition efficiency of the extract. Moreso, the corrosion rate of the mild steel in 1.0 M HCl, monitored by electrochemical measurement revealed that the corrosion rate decreases with increase in the pH, decrease in temperature and increase in concentration of the extract in the acidic solution.
    VL  - 4
    IS  - 2
    ER  - 

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Author Information
  • Department of Chemical and Process Engineering, University of Strathclyde, Glasgow, United Kingdom; Department of Chemistry, College of Education, Ikere, Nigeria

  • Department of Physical and Chemical Sciences, Elizade University, Ilara Mokin, Nigeria; Department of Chemistry, Federal University of Technology, Akure, Nigeria

  • Department of Chemistry, Federal University of Technology, Akure, Nigeria

  • Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Nigeria

  • Department of Chemistry, College of Education, Ikere, Nigeria

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