Faculty
Department
Year of Publication
Publication Type
Abstract
Corrosion is the deterioration of metal caused by chemical reactions or interactions with its
surroundings. In order to address the issue of corrosion which is a major challenge in the
metallurgical industry, there is need to introduce an inhibitor to combat this issue of corrosion. Before now, chemical inhibitors has been in use and because of the risk, toxicity and
disadvantages of these chemical inhibitors, there is a current trend that is moving away from the
use of chemical inhibitors to the use of green organic inhibitor that is sustainable and
environmentally friendly. In this research work, the inhibition of corrosion on mild steel in 1M
HCl solution was evaluated by utilizing Ficus sur extract which serves as the corrosion inhibitor. The synthesis of the ficus sur was done using the hot maceration method and the study of the
corrosion rate was done using the gravimetric weight loss method and the concentrations of
Ficus sur extracts used ranges from 0.0g (blank), 0.1g, 0.2g, 0.3g and 0.4g and the temperature
was varied at three temperatures of 25°C (298K), 48°C (321K) and 60°C (333K). From the result obtained it was shown that as inhibitor concentration increases, corrosion rate
decreases following the gravimetric weight loss method used. Also adsorption studies were
carried out using the Langmuir, Temkin and Freundlich models. From the adsorption studies
carried out although they followed the three adsorption model, these research work best fit the
Langmuir adsorption model which gives us R² = 0.9931. The mild steel surface was also characterized using Scanning Electron Microscope (SEM) which
provides a clear morphology of the metal surface.
surroundings. In order to address the issue of corrosion which is a major challenge in the
metallurgical industry, there is need to introduce an inhibitor to combat this issue of corrosion. Before now, chemical inhibitors has been in use and because of the risk, toxicity and
disadvantages of these chemical inhibitors, there is a current trend that is moving away from the
use of chemical inhibitors to the use of green organic inhibitor that is sustainable and
environmentally friendly. In this research work, the inhibition of corrosion on mild steel in 1M
HCl solution was evaluated by utilizing Ficus sur extract which serves as the corrosion inhibitor. The synthesis of the ficus sur was done using the hot maceration method and the study of the
corrosion rate was done using the gravimetric weight loss method and the concentrations of
Ficus sur extracts used ranges from 0.0g (blank), 0.1g, 0.2g, 0.3g and 0.4g and the temperature
was varied at three temperatures of 25°C (298K), 48°C (321K) and 60°C (333K). From the result obtained it was shown that as inhibitor concentration increases, corrosion rate
decreases following the gravimetric weight loss method used. Also adsorption studies were
carried out using the Langmuir, Temkin and Freundlich models. From the adsorption studies
carried out although they followed the three adsorption model, these research work best fit the
Langmuir adsorption model which gives us R² = 0.9931. The mild steel surface was also characterized using Scanning Electron Microscope (SEM) which
provides a clear morphology of the metal surface.
Supervisor(s)
co-supervisor