Naderi Mahmoodi, RezaBautista Arija, María AsunciónVelasco López, Francisco JavierSoleimani, MPourfath, M2022-05-312022-05-312022-01-15Naderi, R.; Bautista, A.; Velasco, F.; Soleimani, M.; Pourfath, M. Use of licorice plant extract for controlling corrosion of steel rebar in chloride-polluted concrete pore solution. In: Journal of molecular liquids, Vol. 346, 15 January 2022, 117856 (15 p.)0167-7322https://hdl.handle.net/10016/34940The possibility of using licorice extract as a green inhibitor for steel reinforcements in chloride-contaminated simulated concrete pore solution was explored in this study. Different licorice amounts were added to alkaline solutions and then 1% NaCl was also added. Electrochemical studies, up to 24 h, and surface analysis (X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and scanning electron microscopy) were performed. Results demonstrated the inhibition effectiveness of the plant extract on steel rebar corrosion, regardless of the concentration, being detected an inhibition efficiency higher than 80 % with electrochemical techniques for 0.1% licorice extract, which showed the most effective performance. Surface analysis methods confirmed the presence of licorice on the surface, through the deposition of organic molecules present in the plant extract on the surface oxide/hydroxide. DFT calculations confirmed that compounds present in licorice can be chemically adsorbed on steel oxide surface.15eng© 2021 The Authors. Published by Elsevier B.V.This is an open access article under the CC BY license.Atribución 3.0 EspañaSteel rebarLicorice extractGreen corrosion inhibitorSimulated concrete pore solutionElectrochemical assessmentSurface analysisresearch articleMaterialeshttps://doi.org/10.1016/j.molliq.2021.117856open access111785615JOURNAL OF MOLECULAR LIQUIDS346AR/0000029267