Abstract
The inhibition effectiveness of Punica granatum (also called Pomegranate) extract and the synergistic effect of potassium iodide (KI) against the degradation of mild steel in 1 M HCl was studied. Potentiodynamic polarization measurement (PDP) was used in order to investigate the performance of this compound. The presence of a mixture of iodide ions (KI) and inhibitor (PG) increased the degree of surface coverage. Also, the inhibition efficiency reaches 82% at 323 K when the concentration of P. granatum (PG) is 2 mg/L with 10 mM of KI. The synergistic effect between the inhibitor and KI could be explained by the reinforcement of the layer being adsorbed onto the steel surface. The adsorption of inhibitor onto the steel surface followed the Freundlich adsorption isotherm. Characterization techniques, such as scanning electronic microscopy coupled with energy dispersive X–ray spectroscopy (SEM/EDX), Raman, and ultra-violet-visible (UV-visible) spectroscopies, confirm the adsorption of inhibitor onto the surface morphology.
Acknowledgments
The authors wish to thank the timely help given by the Center of Analysis and Characterization (CAC) for analyzing our studied samples at the Cady Ayyad University (Marrakech, Morocco).
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare that they have no conflicts of interest.
Data availability: The all data used to support the findings of this study are available from the corresponding author upon request.
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