Calculation of Diffusion Rate of Migrating Corrosion Inhibitors (MCI) Through Concrete

Migrating Corrosion Inhibitors (MCI) are used for the protection of reinforcing steel in concrete. They can be incorporated as an admixture or topically applied to the concrete surface. Migratory inhibitors are transmitted through concrete to the reinforcing steel by diffusion. Calculation of the diffusion rate of Migratory Corrosion Inhibitors can be used as the basis for calculation of the diffusion rate of these products through concrete. The series of data obtained by IONDIF computer program have been analyzed in the period when the concentration of Migratory Corrosion Inhibitors reached the protective value. The diffusion rates of the Migratory Corrosion Inhibitors were calculated with respect to two depths of reinforcement, 3 and 5 cm, taking them as the most frequent in practice. The application of this calculation to the maintenance schedules of structures is also presented.