Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7884294 | Cement and Concrete Composites | 2015 | 9 Pages |
Abstract
The carbon steel electrodes were first treated by immersion in 0.1Â M phenyl phosphonic acid (C6H5P(O)(OH)2, PPA) solution during 24 or 72Â h, then they were transferred into the corrosion test solution representing interstice pore electrolyte polluted by seawater: (sat. Ca(OH)2Â +Â 0.5Â M NaCl) to evaluate the protective effectiveness of the pre-treatment. The investigation was performed essentially by polarisation curves and electrochemical impedance measurements with rotating disc electrode. Very high protective effect was observed with steel pre-treated during 72Â h with stationary electrode. From polarisation and electrochemical impedance spectroscopy experiments, the protective efficiency was found to be in the 90-99% range for 72Â h pre-treatment. This protective property remains effective even one month immersion. EDS analysis showed the presence of the phosphorus on the steel surface, probably due to the presence of iron-PPA complex.
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Authors
N. Etteyeb, L. Dhouibi, H. Takenouti, E. Triki,