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The erosion of chloride ions in concrete bridges will accelerate thecorrosion of reinforcement, which is an important reason for the decline ofbridge durability. The erosion process of chloride ion, especially deicing saltsolution in cold regions, is complex and has many influencing factors. It isvery important to use accurate and effective methods to analyze the chlorideion erosion process in concrete. In this study, the pre-stressed concretebridge retired in the cold region was taken as the research object, and thespecimens from the whole bridge are obtained by the method of core drillingsampling. The concentration of chloride ion was measured at different depths ofthe specimens. The process of chloride ion erosion was simulated intwo-dimensional space through COMSOL multi-physical field simulation, andcompared with the measured results. The simulation method proposed in thispaper has good reliability and accuracy.

Chloride Ion Erosion of Pre-Stressed Concrete Bridges in Cold Regions