Corrosion Research and XCT Investigation of RC under Different Artificial Environment Simulation

Abstract

Abstract In this experiment, the common electric accelerated corrosion and drying-wetting cyclic corrosion test are compared, and the influencing factors (diameter of steel and thickness of protective layer) of the two corrosion methods are analyzed. When the constant current density was 100uA/cm2, the cracking time of the protective layer of the wetting-drying test samples was about 4 times that of the electrified test samples. For the two kinds of acceleration experiments, the cracking time of the protective layer increases with the increase of the diameter of the reinforcement and the thickness of the protective layer. Under the condition of accelerated corrosion by electrification, the diameter of reinforcement has a great influence on the cracking time of the protective layer, while the thickness of the protective layer has a relatively small influence. Under the condition of accelerated drying-wetting cyclic corrosion, the thickness of the protective layer has a great influence on the cracking time. The influence of the diameter of reinforcement is not obvious. In addition, we further explored the specimen with XCT. The rust patterns of the two samples are different.