New Application of Chamaerops Humilis L. Extract as a Green Corrosion Inhibitor for Reinforcement Steel in a Simulated Carbonated Concrete Pore Solution

• Autor(a) principal: Benmessaoud Left,D.
• Data de Publicação: 2018
• Outros Autores: Zertoubi,M., Khoudali,S., Azzi,M.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042018000400002
• topic: Reinforcement steel; carbonated concrete; pore solution; inhibitor; Chamaerops humilis L; plant extract

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.