Abstract:The corrosion of reinforced bars induced by intrusion of corrosive substances under 2D diffusion could be offset by setting proper bending radius. Relationship between the bending radius and the 2D chloride diffusion was investigated, and the bending radius to achieve synchronization corrosion of reinforced bars at the corner region and the middle region were deduced. Sensitivity analyses indicate that under chloride environments, the bending radius to ensure synchronization corrosion of the reinforced bars at the corner region and the middle region is not related to chloride diffusion coefficient, it is proportional to protective layer thickness and critical chloride concentration, and is inversely proportional to surface chloride concentration and initial chloride concentration. Through the analysis of the test data of T shape beam, the protective layer thickness of reinforced bars should be determined based on the 3D images of reinforced bars skeleton considering the influences of the bending radius and 2D diffusion effects, so that the risk of reinforced bar corrosion can be properly evaluated.