The Corrosion Inhibition and Adsorption Behavior of Lansium Domesticum on Mild Steel Extracts in Various Corrosive Environments

Choo, Weng Wei (2017) The Corrosion Inhibition and Adsorption Behavior of Lansium Domesticum on Mild Steel Extracts in Various Corrosive Environments. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

In this project, langsat peel was extracted and tested for its corrosion inhibition on mild steel. The corrosive media used were 3.5% NaCl , 1M HCl and simulated cooling water (SCW) to simulate environments that involve seawater, acid cleaning and cooling water respectively. The concentration of the peel extract was variated at 1.0 g/L, 2.0 g/L, 3.0 g/L and 4.0 g/L. The properties of corrosion inhibition properties were characterized by weight loss measurements and potentiodynamic polarization. The surface of the mild steel treated with the lansium domesticum inhibitor was analyzed using Fourier Transform Infrared Spectroscopy (FTIR) to characterize the interaction between metal and plant extract. Microscopic and visual observation were used to observe the degree of corrosion as well as the corrosion products on the mild steel surfaces.