volume | PIER Journals

Abstract

Rebar corrosion is a common hidden danger in concrete structures, posing a serious threat to structural safety. Due to its concealed nature, detecting rebar corrosion remains a significant challenge. Recently, a new detecting principle for internal rebar corrosion: Magnetic Resonance Eddy Current Penetration Imaging (MREPI) is proposed. This method significantly enhances the detection depth of eddy currents through resonance amplification. In this work, the theoretical and numerical analysis of MREPI has been done. The results demonstrate the higher sensitivity than the traditional eddy current testing (ECT). Furthermore, we built an MREPI sensor by using nanocrystalline soft magnetic metal as magnetic core to detect the rebar corrosion. Experimental results show that the proposed sensor can effectively test rebar within concrete, with the imaging patterns of corroded rebar being distinguishable.

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Dr. Xiaoming She

Dr. Haitao Chen

Dr. Zhengxuan Zhang

Dr. Jinming Zhang

Professor Leng Liao