Effects of moisture availability on corrosion kinetics of steel embedded in concrete
- Centro Nacional de Investigaciones Metalurgicas, Madrid (Spain)
- Univ. Nacional Autonoma de Mexico, Edificio (Mexico). Facultad de Quimica
The quantitative relations between the corrosion rate (in terms of the corrosion current density, I{sub corr}) of steel in concrete and the electrolyte supply was studied. The degree of pore saturation of concrete determined the type of natural control of the corrosion kinetics of the embedded steel. Corrosion of steel in atmosphere and in concrete in an active state conformed to a semi-logarithmic relationship between I{sub corr} and the relative humidity (RH) of the atmosphere or the degree of pore saturation of the concrete. The latter variable dictated resistivity of the concrete. However, once corrosion at a steel-concrete interface started, it was found that the concrete cover could be detrimental to the corrosion process of the embedded steel. The porous nature of concrete resulted in longer wetting times than bare steel surfaces.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 142364
- Journal Information:
- Corrosion, Vol. 49, Issue 12; Other Information: PBD: Dec 1993
- Country of Publication:
- United States
- Language:
- English
Similar Records
Significance of coplanar macrocells to corrosion in concrete-embedded steel
Electrochemical behavior of steel in concrete and evaluation of the corrosion rate