Corrosion Initiation Life of Corrosion Resistant Low Alloy Steel Rebars Based on Reliability Analysis

The method of Monte Carlo probability analysis together with literature survey were used to predict the corrosion initial life of 3 kinds of corrosion resistant low alloy steel rebars with different Cr content in marine environment.The influence of temperature on the corrosion initiation life was studied as a key point.The results show that the increase of temperature not only reduced the critical chloride concentration but also increased the diffusion coefficient of chloride in concrete.Using corrosion resistant low alloy steel rebars can prolong the corrosion initial life,improve the durability of steel rebar reinforced concrete structures in marine environment.But more strict anti-corrosion measures should be taken for rebars in extremely harsh service environment.