Projecting Time-to-Corrosion for Black and Corrosion Resistant Reinforcement in Concrete Exposed to Chlorides

A modeling approach for projecting time-to-corrosion, T_i, of black and select corrosion resistant reinforcements in concrete exposed to chlorides is proposed based upon the solution to Fick’s second law of diffusion.  In this, T_i is calculated using previously reported distributed chloride threshold concentration, C_T, and reinforcement cover data and assuming that the distributed nature of the effective diffusion coefficient and surface chloride concentration are reflected in the C_T data.  Results are discussed within the context of infrastructure durability issues.