The aim of this work was to obtain the electrode potential profile of steel
in a reinforced cylindrical concrete structure which was immersed in sea w
ater, as a function of surface concrete chloride concentration and pH, taki
ng into account Green Rust (GR1, Fe-4(OH)(8)Cl) formation as a corrosion pr
oduct.
The proposed model is based on a bi-directional chloride flux through the c
oncrete thickness. It allows one to predict the chloride concentration prof
ile along metal/concrete interface, and also when the critical concentratio
n (necessary to cause passive film breakdown) has been reached and the time
necessary to (at fixed concrete thickness and chloride effective diffusion
coefficient). With these values, the redox potential may be estimated. Thr
ough a series of field data, the capability of the model was tested and yie
lded good correlation.