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Evaluation of the corrosion inhibition of salts of organic acids in alkaline solutions and chloride contaminated concrete / T. Pastore in Materials and corrosion, Vol. 62 N° 2 (Fevrier 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 2 (Fevrier 2011) . - pp. 187–195 Titre : Evaluation of the corrosion inhibition of salts of organic acids in alkaline solutions and chloride contaminated concrete Type de document : texte imprimé Auteurs : T. Pastore, Auteur ; M. Cabrini, Auteur ; L. Coppola, Auteur Année de publication : 2011 Article en page(s) : pp. 187–195 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Corrosion  inhibitors  Localized  corrosion  Reinforced  concrete  Sodium  lactate  Steel Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : This paper summarizes the results of testing on salts of organic acids for evaluating their use as inhibitors of rebar corrosion in chloride-contaminated concrete. Initially a screening based on electrochemical tests in alkalinized calcium hydroxide solutions was performed on a number of carboxylic acid salts with different number of carbon atoms in the chain and carboxylic groups, also covering substances with hydroxyl and amine group substituents. The screening was completed by testing on carbon steel rebars in concretes with chlorides and substances added at 1:1 molar ratio, focused on sodium lactate, sodium oxalate and sodium borate for comparison. The monitoring of free corrosion potential and linear polarization resistance of steel bars have confirmed significant inhibition only for lactate. Corrosion was only restricted to occluded zones where the access of substance was limited by disadvantageous geometry, producing shallow attacks. Results of further tests in saturated calcium hydroxide solution are reported in order to assess the inhibition ability of lactate as a function of its content, chloride content and pH. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005789/abstract [article] Evaluation of the corrosion inhibition of salts of organic acids in alkaline solutions and chloride contaminated concrete [texte imprimé] / T. Pastore, Auteur ; M. Cabrini, Auteur ; L. Coppola, Auteur . - 2011 . - pp. 187–195. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 2 (Fevrier 2011) . - pp. 187–195 Mots-clés : Corrosion  inhibitors  Localized  corrosion  Reinforced  concrete  Sodium  lactate  Steel Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : This paper summarizes the results of testing on salts of organic acids for evaluating their use as inhibitors of rebar corrosion in chloride-contaminated concrete. Initially a screening based on electrochemical tests in alkalinized calcium hydroxide solutions was performed on a number of carboxylic acid salts with different number of carbon atoms in the chain and carboxylic groups, also covering substances with hydroxyl and amine group substituents. The screening was completed by testing on carbon steel rebars in concretes with chlorides and substances added at 1:1 molar ratio, focused on sodium lactate, sodium oxalate and sodium borate for comparison. The monitoring of free corrosion potential and linear polarization resistance of steel bars have confirmed significant inhibition only for lactate. Corrosion was only restricted to occluded zones where the access of substance was limited by disadvantageous geometry, producing shallow attacks. Results of further tests in saturated calcium hydroxide solution are reported in order to assess the inhibition ability of lactate as a function of its content, chloride content and pH. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005789/abstract