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<p>Corrosion is a process that destructively affects metallic materials and chemical processes. Whereas attention has been drawn to the mitigation of corrosion following its adverse effects on materials. In the search to control corrosion, more attention has been given to the use of plant extracts as inhibitors. The reason is because of their reliability, effectiveness and eco-friendliness, over other synthetic ones. This project is based on the use of <i>Camellia sinensis</i> as a corrosion inhibitor for aluminum in sulphuric acid medium. It also reviews the computational studies of the inhibitor for the corrosion of aluminum. In this work, weight loss method of corrosion test was considered. It was found that inhibition efficiency is a function of concentration and temperature. It increases as the inhibitor’s concentration increases and decreases with temperature. Conversely, corrosion rate decreases with concentration and increase with rise in temperature. Physical adsorption was confirmed in this study because the average value of activation energies is lower than 40kJmol<sup>− 1</sup> and the heat of adsorption, Q<sub>ad</sub> is also negative which signifies that the process was spontaneous and exothermic. FTIR spectrometer shows a broad peak between 3695 and 3278&#xa0;cm<sup>− 1</sup>, 2916–2848&#xa0;cm<sup>− 1</sup> 1725&#xa0;cm<sup>− 1</sup>, 1617–1542&#xa0;cm<sup>− 1</sup>, 1418–1236&#xa0;cm<sup>− 1</sup> and 1162–1028&#xa0;cm<sup>− 1</sup> indicates the presence of hydroxyl (-OH) group, C-H stretching vibrations, esters and carboxylic acids, C = C aromatic and amide vibrations, flavonoids and proteins, C-O and C-O-C stretching confirming carbohydrates and cellulose structures. SEM and XRD were used to examine morphology and composition of the aluminum respectively.</p>

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Experimental studies on Camellia sinensis (tea) leaf extract as inhibitor for the corrosion of aluminum in H2SO4 solution

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月9日

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  • Udo Idongesit Ignatius,
  • Ukpong Etiowo George,
  • Shadrack John Aboki,
  • Humphrey Sam Samuel,
  • Emmanuel Edet Etim

摘要

Corrosion is a process that destructively affects metallic materials and chemical processes. Whereas attention has been drawn to the mitigation of corrosion following its adverse effects on materials. In the search to control corrosion, more attention has been given to the use of plant extracts as inhibitors. The reason is because of their reliability, effectiveness and eco-friendliness, over other synthetic ones. This project is based on the use of Camellia sinensis as a corrosion inhibitor for aluminum in sulphuric acid medium. It also reviews the computational studies of the inhibitor for the corrosion of aluminum. In this work, weight loss method of corrosion test was considered. It was found that inhibition efficiency is a function of concentration and temperature. It increases as the inhibitor’s concentration increases and decreases with temperature. Conversely, corrosion rate decreases with concentration and increase with rise in temperature. Physical adsorption was confirmed in this study because the average value of activation energies is lower than 40kJmol− 1 and the heat of adsorption, Qad is also negative which signifies that the process was spontaneous and exothermic. FTIR spectrometer shows a broad peak between 3695 and 3278 cm− 1, 2916–2848 cm− 1 1725 cm− 1, 1617–1542 cm− 1, 1418–1236 cm− 1 and 1162–1028 cm− 1 indicates the presence of hydroxyl (-OH) group, C-H stretching vibrations, esters and carboxylic acids, C = C aromatic and amide vibrations, flavonoids and proteins, C-O and C-O-C stretching confirming carbohydrates and cellulose structures. SEM and XRD were used to examine morphology and composition of the aluminum respectively.