Effectiveness conditions of sodium monofluorophosphate as a corrosion inhibitor for concrete reinforcements |
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Authors: | Thierry Chaussadent Véronique Nobel-Pujol Isabelle Mabille |
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Affiliation: | a Laboratoire Central des Ponts des Chaussées, Physico-Chimie des Matériaux, 58 Boulevard Lefebvre, 75732, Paris Cedex 15, France b Laboratoire de Génie des Procédés Plasmas et Traitement de Surfaces, UPMC/ENSCP- EA 3492, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231, Paris Cedex 05, France |
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Abstract: | Among the array of protection and repair methods for reinforced concrete structures when steel reinforcements undergo corrosion, the use of migrating corrosion inhibitors could prove to be an attractive alternative. These products, applied to the concrete surface, are intended to diffuse into the concrete in order to reach the reinforcement and stop or delay corrosion.Some key aspects on the use of monofluorophosphate (MFP) as an inhibitor for concrete reinforcements are presented first. The experimental work has focused on developing a method to determine the amount of MFP in concrete and on studying the chemical interactions taking place between MFP and certain concrete components. These data are then used to explain MFP penetration profiles in concretes as well as the correlation with electrochemical measurements. |
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Keywords: | Sodium monofluorophosphate A Reaction C Corrosion C Transport properties C Electrochemical properties |
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