Steel corrosion-inducing phenomena in concrete: carbonation and chloride penetration
Corrosion of reinforced concrete structures

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Steel corrosion-inducing phenomena in concrete: carbonation and chloride penetration


Corrosion of reinforced concrete structures

Author : Bruno CAPRA

Publication date: November 10, 2014 | Lire en français

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4. Steel corrosion-inducing phenomena in concrete: carbonation and chloride penetration

Reinforcement corrosion in reinforced concrete structures is induced by two distinct phenomena:

  • carbonation of concrete, by penetration of a CO 2 front from the surface to the core of the concrete ;

  • chloride ion penetration for structures in marine environments (submerged, in tidal zones, subject to splashing or spray), or exposed to de-icing salts in environments at risk of freezing (direct contact, splashing, run-off, etc.).

The boundary between the initiation phase of reinforcement corrosion and the start of the propagation phase (point A on figure

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