NDLI: Influence of temperature on the galvanic current induced by a localized repair when using primers to the reinforcement in slightly chloride contaminated concrete

Content Provider	Springer Nature Link
Author	Andrade, C. Castro, P. Pazini, E.
Copyright Year	2007
Abstract	An electrochemical macrocell between repaired and adjacent unrepaired zones has been reported when a local concrete patch is performed. This macrocell seems to lead to the corrosion of neighboring not repaired zones. Previous experiments of the authors in slightly chloride contaminated concrete have shown that the macrocell activity lasts very short time (only during the curing). In present paper the effect to rise the temperature to 40°C maintaining the RH, typical of tropical climates, is studied. The results show that the galvanic effect is not enhanced while the corrosion rate does it, which confirms the independence of the galvanic current from the corrosion rate.Quand le béton est réparé localement on dit qui une macrocouple entre les zones si et non réparées se forme. Cette macrocouple est dite qu’accélère la corrosion des zones voisines de la part réparée. Dans des articles publiés par les auteurs sur béton avec une quantité modérée des chlorures on a vérifié que l’action galvanique a une très courte durée (seulement pendant le période de cure). Dans la présente étude ce qui a été essayé est l’effet d’une élévation de la température à 40°C en maintenant l’humidité relative. Les résultats montrent que le courant galvanique ne change presque pas mais la vitesse de corrosion augmente, ce que confirme que la corrosion est principalement dû à l’action des microcouples.
Starting Page	351
Ending Page	361
Page Count	11
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	41
Issue Number	2
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-06-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Reinforcement corrosion Galvanic couples Temperature Building Materials Civil Engineering Operating Procedures, Materials Treatment Mechanical Engineering Theoretical and Applied Mechanics Structural Mechanics
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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