Abstract
The mechanism of corrosion of reinforcing steel in concrete was investigated by the measurements of local cell polarization curve, X-ray diffraction and electron diffraction.
The formation of the protective cement film on the surface of the reinforcing steel in wet concrete is faster than that in dry concrete, and it is accelerated by existence of CO2 gas, and is delayed by existence of Cl- ion.
It seems, therefore, the cement film is a complex compound containing CaCO3. But the epitaxic relation between the cement film and the surface of the reinforcing steel could not be provided.
