Abstract

BENMESSAOUD LEFT, D.; ZERTOUBI, M.; KHOUDALI, S.  and  AZZI, M.. New Application of Chamaerops Humilis L. Extract as a Green Corrosion Inhibitor for Reinforcement Steel in a Simulated Carbonated Concrete Pore Solution. Port. Electrochim. Acta [online]. 2018, vol.36, n.4, pp.249-257. ISSN 0872-1904.  https://doi.org/10.4152/pea.201804249.

In the present work, we present the first study about the effect of Chamaerops humilis L. extract on the behavior of reinforcement steel in a carbonated concrete pore solution (pH≈9). This study has been realized using electrochemical measurements: open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS). The phytochemical screening was used to reveal the presence of some phyto-constituents in the plant extract. The Folin-Ciocalteu method and the AlCl3 coloration were used to determine the total phenolic and flavonoid contents, respectively. Results show that the plant extract has a beneficial effect on the development of a passive layer. The extract plays an important role in the corrosion potential evolution, and in the polarization resistance increase. The inhibition efficiency of the plant extract is close to 60% at a concentration of 0.75 g/L. Corrosion parameters also changed with exposure time.

Keywords : Reinforcement steel; carbonated concrete; pore solution; inhibitor; Chamaerops humilis L; plant extract.

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