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Influence of two specific inhibitors on steel corrosion in a synthetic solution simulating a carbonated concrete with chlorides / C. Monticelli in Materials and corrosion, Vol. 62 N° 2 (Fevrier 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 2 (Fevrier 2011) . - pp. 178–186 Titre : Influence of two specific inhibitors on steel corrosion in a synthetic solution simulating a carbonated concrete with chlorides Type de document : texte imprimé Auteurs : C. Monticelli, Auteur ; A. Frignani, Auteur ; A. Balbo, Auteur Année de publication : 2011 Article en page(s) : pp. 178–186 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Carbonation  Chloride  Corrosion  inhibitor  EIS  analysis  Synthetic  solution Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The present research aims at studying two corrosion inhibitors, that is sodium 2-amino-benzoate (2AMB) and sodium glycero-phosphate (GPH), in a synthetic solution simulating the composition of the pore solution in a carbonated concrete, containing chlorides. Tests have been performed to verify if the simultaneous use of the two substances is compatible and if their addition can efficiently hinder the corrosion attack in the presence of both chlorides and carbonation. The synthetic solution has been prepared by bubbling carbon dioxide through a saturated (and filtered) solution of Ca(OH)2, containing 0.1 M NaCl, in order to reach pH 7. Polarization curve recording and EIS technique have shown that, after an induction period of about 24 h, the highest inhibiting efficiencies are obtained by mixtures of the two additives at the concentration of 0.05 M, which still produce high inhibiting efficiencies (87%) at the end of 120 h immersion. At the end of this exposure period, also more diluted symmetric mixtures (0.025 and 0.01 M) exhibit comparable efficiencies. The analysis of EIS spectra gives interesting information concerning the inhibiting mechanism of the studied mixture. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005764/abstract [article] Influence of two specific inhibitors on steel corrosion in a synthetic solution simulating a carbonated concrete with chlorides [texte imprimé] / C. Monticelli, Auteur ; A. Frignani, Auteur ; A. Balbo, Auteur . - 2011 . - pp. 178–186. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 2 (Fevrier 2011) . - pp. 178–186 Mots-clés : Carbonation  Chloride  Corrosion  inhibitor  EIS  analysis  Synthetic  solution Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The present research aims at studying two corrosion inhibitors, that is sodium 2-amino-benzoate (2AMB) and sodium glycero-phosphate (GPH), in a synthetic solution simulating the composition of the pore solution in a carbonated concrete, containing chlorides. Tests have been performed to verify if the simultaneous use of the two substances is compatible and if their addition can efficiently hinder the corrosion attack in the presence of both chlorides and carbonation. The synthetic solution has been prepared by bubbling carbon dioxide through a saturated (and filtered) solution of Ca(OH)2, containing 0.1 M NaCl, in order to reach pH 7. Polarization curve recording and EIS technique have shown that, after an induction period of about 24 h, the highest inhibiting efficiencies are obtained by mixtures of the two additives at the concentration of 0.05 M, which still produce high inhibiting efficiencies (87%) at the end of 120 h immersion. At the end of this exposure period, also more diluted symmetric mixtures (0.025 and 0.01 M) exhibit comparable efficiencies. The analysis of EIS spectra gives interesting information concerning the inhibiting mechanism of the studied mixture. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005764/abstract