Microcell versus galvanic corrosion currents in carbonated concrete
Identifieur interne : 004061 ( Main/Exploration ); précédent : 004060; suivant : 004062Microcell versus galvanic corrosion currents in carbonated concrete
Auteurs : Arnaud Castel [Australie] ; Abdelkader Nasser [France]Source :
- Magazine of concrete research [ 0024-9831 ] ; 2014.
Descripteurs français
- Pascal (Inist)
- Wicri :
English descriptors
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Abstract
This paper presents specific experiments developed to assess galvanic corrosion currents in carbonated concrete. The work investigated the influence of both the steel-concrete interface condition and the cathodic to anodic surface ratio. Galvanic corrosion currents were compared with microcell corrosion currents. In the quasi-saturated condition, galvanic corrosion currents were systematically found to be much higher than microcell corrosion currents. Moreover, the presence of defects at the interface between the anodic steel surface and concrete leads to a significant increase in the macrocell driving potential and, therefore, in the galvanic corrosion current. Furthermore, the galvanic current density strongly increased with increasing cathodic to anodic surface ratio. The coupling of a high cathodic to anodic surface ratio and the presence of steel-concrete interface defects at the anodic surface leads to huge galvanic corrosion current densities.
Affiliations:
- Australie, France
- Midi-Pyrénées, Nouvelle-Galles du Sud, Occitanie (région administrative)
- Sydney, Toulouse
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Le document en format XML
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The work investigated the influence of both the steel-concrete interface condition and the cathodic to anodic surface ratio. Galvanic corrosion currents were compared with microcell corrosion currents. In the quasi-saturated condition, galvanic corrosion currents were systematically found to be much higher than microcell corrosion currents. Moreover, the presence of defects at the interface between the anodic steel surface and concrete leads to a significant increase in the macrocell driving potential and, therefore, in the galvanic corrosion current. Furthermore, the galvanic current density strongly increased with increasing cathodic to anodic surface ratio. The coupling of a high cathodic to anodic surface ratio and the presence of steel-concrete interface defects at the anodic surface leads to huge galvanic corrosion current densities.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Midi-Pyrénées</li><li>Nouvelle-Galles du Sud</li><li>Occitanie (région administrative)</li></region><settlement><li>Sydney</li><li>Toulouse</li></settlement></list><tree><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Castel, Arnaud" sort="Castel, Arnaud" uniqKey="Castel A" first="Arnaud" last="Castel">Arnaud Castel</name></region></country><country name="France"><region name="Occitanie (région administrative)"><name sortKey="Nasser, Abdelkader" sort="Nasser, Abdelkader" uniqKey="Nasser A" first="Abdelkader" last="Nasser">Abdelkader Nasser</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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