The impressing current technique is widely used in corrosion related research with different current densities. However, the research on the effect of current density on corrosion characteristics is still limited. In the present research, five current densities were impressed to accelerate the reinforcement corrosion, and X-ray micro-computed tomography was employed to achieve non-destructive visual tracing of the entire process. The results indicate that under different current densities, the actual mass loss of the reinforcement did not always equal to the theoretical results calculated with Faraday’s Law. When altering the current densities, the corrosion uniformity changed and the development of the concrete cover cracking differed obviously.

施加电流技术已广泛用于具有不同电流密度的腐蚀相关研究。但是，关于电流密度对腐蚀特性的影响的研究仍然有限。在本研究中，施加了五种电流密度以加速钢筋腐蚀，并采用X射线计算机断层扫描技术实现了整个过程的无损视觉跟踪。结果表明，在不同的电流密度下，钢筋的实际质量损失并不总是等于法拉第定律计算的理论结果。当改变电流密度时，腐蚀均匀性发生变化，混凝土保护层开裂的发展也明显不同。