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Phenomenological process of rebar corrosion in reinforced concrete evaluated by acoustic emission and electrochemical noise
Highlights In the present study, we investigate non-destructive evaluation of rebar corrosion by applying AE activity and electrochemical noise in reinforced concrete. The following innovative results are derived. Acoustic emission (AE) activity is surely observed due to peeling of oxide film on the surface of rebar. Pitting index of electrochemical noise (EN) method is applicable to detect pitting corrosion on the rebar surface. By combining both findings, the process of rebar corrosion in concrete can be phenomenologically evaluated at an early stage.
Abstract Rebar corrosion was evaluated by monitoring reinforced concrete specimens. An electrical corrosion test accelerated the corrosion, and non-destructive evaluation of the acoustic emission (AE) and electrochemical noise (EN) was applied. Because AE phenomena were detected during rebar corrosion, the rise time and maximum amplitude increased, showing waveform variations. The AE activity was attributed to oxide film peeling of the rebar surface. The pitting index of the EN analysis ranged from –1 to 0, indicating localized corrosion. The EN method can detect pitting corrosion on rebar surfaces. AE and EN can be combined to phenomenologically evaluate early-stage rebar corrosion in concrete.
Phenomenological process of rebar corrosion in reinforced concrete evaluated by acoustic emission and electrochemical noise
Highlights In the present study, we investigate non-destructive evaluation of rebar corrosion by applying AE activity and electrochemical noise in reinforced concrete. The following innovative results are derived. Acoustic emission (AE) activity is surely observed due to peeling of oxide film on the surface of rebar. Pitting index of electrochemical noise (EN) method is applicable to detect pitting corrosion on the rebar surface. By combining both findings, the process of rebar corrosion in concrete can be phenomenologically evaluated at an early stage.
Abstract Rebar corrosion was evaluated by monitoring reinforced concrete specimens. An electrical corrosion test accelerated the corrosion, and non-destructive evaluation of the acoustic emission (AE) and electrochemical noise (EN) was applied. Because AE phenomena were detected during rebar corrosion, the rise time and maximum amplitude increased, showing waveform variations. The AE activity was attributed to oxide film peeling of the rebar surface. The pitting index of the EN analysis ranged from –1 to 0, indicating localized corrosion. The EN method can detect pitting corrosion on rebar surfaces. AE and EN can be combined to phenomenologically evaluate early-stage rebar corrosion in concrete.
Phenomenological process of rebar corrosion in reinforced concrete evaluated by acoustic emission and electrochemical noise
Kawasaki, Yuma (author) / Fukui, Shinya (author) / Fukuyama, Tomoko (author)
2022-08-14
Article (Journal)
Electronic Resource
English
Acoustic Emission Techniques for Rebar Corrosion in Reinforced Concrete
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