caa a22 4500 463232798 CHVBK 20180405153247.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-0880-3 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0880-3 Electrochemical study of corrosion inhibition of steel reinforcement in alkaline solutions containing phosphates based components [Elektronische Daten] [Naceur Etteyeb, Leila Dhouibi, Mercedes Sanchez, Cruz Alonso, Carmen Andrade, Ezzeddine Triki] The aim of this study is to investigate the viability of use of sodium phosphate (Na3PO4: SP), tetrasodium pyrophosphate (Na4P2O7: TSPP) and hydroxyethylidene-diphosphonic acid (C2H8O7P2: HEDP) as a non-toxic corrosion inhibitors of steel bars in alkaline media which simulate the electrolyte in the concrete pores. The effectiveness of these phosphate compounds as corrosion inhibitors was investigated by measuring the corrosion potentials, the polarization curves, the corrosion current densities, and the electrochemical impedance spectroscopy of steel bars immersed for 30days in saturated Ca(OH)2 solutions with and without chlorides. At the completion of the tests, the mass losses were determined in order to verify the reliability of the electrochemical results. The results showed that phosphate compounds form a protective layer on the steel surface when immersed in alkaline solution without chlorides. In the presence of chloride ions, the SP acts as an anodic inhibitor and reduces the corrosion activity on steel. The HEDP shows lower efficiency, probably due to the decrease of the pH and to the high [Cl−]/[inh] ratio used. Results obtained by electrochemical and gravimetric methods are in quite reasonable agreement. Springer Science+Business Media, LLC, 2007 Etteyeb Naceur Unité de Recherche: Corrosion et Protection des Métalliques, ENIT, B. P. 37, 1002, Tunis-Belvedere, Tunisia aut Dhouibi Leila Unité de Recherche: Corrosion et Protection des Métalliques, ENIT, B. P. 37, 1002, Tunis-Belvedere, Tunisia aut Sanchez Mercedes Institute of Construction Science Eduardo Torroja (CSIC), 28033, Madrid, Spain aut Alonso Cruz Institute of Construction Science Eduardo Torroja (CSIC), 28033, Madrid, Spain aut Andrade Carmen Institute of Construction Science Eduardo Torroja (CSIC), 28033, Madrid, Spain aut Triki Ezzeddine Unité de Recherche: Corrosion et Protection des Métalliques, ENIT, B. P. 37, 1002, Tunis-Belvedere, Tunisia aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 4721-4730 0022-2461 42:13<4721 2007 42 10853 https://doi.org/10.1007/s10853-006-0880-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0880-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Etteyeb Naceur Unité de Recherche: Corrosion et Protection des Métalliques, ENIT, B. P. 37, 1002, Tunis-Belvedere, Tunisia aut NATIONALLICENCE 700 1- Dhouibi Leila Unité de Recherche: Corrosion et Protection des Métalliques, ENIT, B. P. 37, 1002, Tunis-Belvedere, Tunisia aut NATIONALLICENCE 700 1- Sanchez Mercedes Institute of Construction Science Eduardo Torroja (CSIC), 28033, Madrid, Spain aut NATIONALLICENCE 700 1- Alonso Cruz Institute of Construction Science Eduardo Torroja (CSIC), 28033, Madrid, Spain aut NATIONALLICENCE 700 1- Andrade Carmen Institute of Construction Science Eduardo Torroja (CSIC), 28033, Madrid, Spain aut NATIONALLICENCE 700 1- Triki Ezzeddine Unité de Recherche: Corrosion et Protection des Métalliques, ENIT, B. P. 37, 1002, Tunis-Belvedere, Tunisia aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/13(2007-07-01), 4721-4730 0022-2461 42:13<4721 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer