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ABSTRACT
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.
