In this study, the influence of voids on corrosion process at the steel-concrete interface was investigated, as the exact influence of these features on corrosion processes under various environmental conditions is not entirely understood. Coupled multi electrode arrays and electrical resistance probes were implemented to monitor the evolution of corrosion under cyclic exposure to chlorides and carbonation. MicroCT was used to determine the location and volume of corrosion damage. It was found that, in most cases, corrosion damage initiated outside the voids. During initiation and the early propagation phase, the steel beneath the voids rarely participated in the redox reaction. In following phases, various kinds of corrosion evolution were observed. Specific corrosion mechanisms were proposed and discussed to explain these corrosion processes.

中文翻译：

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钢-混凝土界面空隙周围腐蚀的研究


在本研究中，研究了空隙对钢-混凝土界面腐蚀过程的影响，因为这些特征在各种环境条件下对腐蚀过程的确切影响尚不完全清楚。采用耦合多电极阵列和电阻探针来监测循环暴露于氯化物和碳酸化下的腐蚀演变。 MicroCT 用于确定腐蚀损伤的位置和体积。研究发现，在大多数情况下，腐蚀损伤是在空隙外部开始的。在引发和早期扩展阶段，空隙下方的钢很少参与氧化还原反应。在接下来的阶段中，观察到各种腐蚀演变。提出并讨论了具体的腐蚀机制来解释这些腐蚀过程。