Investigating the effectiveness of pomegranate peel extract in protecting rebar corrosion in concrete simulant solution

Articles in Press

Document Type : Original Article

Authors

1 Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran.

2 Department of Applied Chemistry, Faculty of Chemistry, University of Guilan, Rasht, Iran

10.30509/jcst.2025.167495.1256

Abstract

In this research, the inhibition effects of the pomegranate peel extracted with water and water/acetonitrile solvent as a green corrosion inhibitor of steel rebar in a concrete simulation environment investigated. For this purpose, the inhibition effect was evaluated using spectroscopic, electrochemical, weight loss, and electron microscopy methods. Concentrations of 1%, 2%, 3% and 4% by volume/volume of the green inhibitor were investigated and the optimal concentration of 4 wt.% for calcium nitrate inhibitor. The results showed that the inhibition efficiency of the extracted extract in the water/acetonitrile at the optimal concentration of 3% v/v was higher than nitrate. The impedance results showed that in the presence of the green inhibitor, the polarization resistance (Rp) increased from 488 (Ω.cm2) in the blank to 8260 (Ω.cm2) in the inhibitor and the inhibition efficiency was 94% compared to nitrate (91.8%). The SEM-EDX results indicated the formation of a continuous inhibitor film on the metal substrate, which prevents the penetration and absorption of chloride ions thus preserving the passive film on the metal substrate.

Keywords

Journal of Color Science and Technology

Articles in Press, Accepted Manuscript
Available Online from 09 July 2025

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