Assessment of the Corrosion Inhibitory Potentials of Chromolaena Odorata Leaf Extract on Mild Steel in Hydrogen Chloride Acid Environment

E. M. Ezeh, A. P. Chinedu












This study aims to evaluate the corrosion inhibitory potential of Chromolaena Odorata leaf extract (COL) on mild steel in a hydrogen Chloride acid (HCl) medium. A gravimetric method was used for the corrosion control experiment. The inhibition efficiency was optimized using the responses surface methodology. The protective film formed on the mild steel surface was analyzed by Fourier Transmission Infrared (FTIR) spectroscopy and Scanning Electron Microscopy (SEM). The electrochemical parameters of the corrosion test were investigated, the corrosion rate progressively decreased with time, with a maximum inhibition efficiency of 83.33%, whereas the corrosion rate reduced from 17.79 to 3.704mgcm-2h-1. FTIR analysis revealed the stretching vibrations of C≡C, C=C, C=O, and O–H bonds. The SEM images show that the addition of COL inhibitor remarkably decreased the rate of mild steel corrosion. This study showed that COL plant extracts effectively inhibited mild steel corrosion in 1M HCl. COL plant extract. Therefore, it served as an eco-friendly and effective green corrosion inhibitor for mild steel in an acidic medium                                                 









Corrosion rate; Inhibition efficiency; Chromolaena Odorata; FTIR analysis; SEM image; Optimization

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