A STUDY ON CORROSION BEHAVIOR OF REINFORCED REBAR IN SIMULATED PORE SOLUTION BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY (EIS)

J Chin Soc Corr Pro

1997, Vol. 17

Issue (1): 19-24 DOI:

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A STUDY ON CORROSION BEHAVIOR OF REINFORCED REBAR IN SIMULATED PORE SOLUTION BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY (EIS)

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Abstract The EIS of rebars immersed in simulated pore solutions of concrete with different pH values and concentrations of chloride ion was measured. The characteristics of EIS of rebar in periods of stable passivation, pit incubation and pit propagation were studied. The EIS of rebar in stable passivation was a single capacitive arc with one time constant on impedance plane. An inductive component was observed in low frequency range during pit incubation period, and the impedance plane composed of two capacitive loops during pit propagation period. The correspoding equivalent circuits were proposed respectively, which could interpret the corrosion mechanism of rebar in simulated pore solutions.

Key words: Reinforcing rebar Simulated pore solution Corrosion EIS

Received: 25 February 1997

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LIU Xiaomin SHI Zhiming LIN Haichao SONG Guangling CAO Chunan(State Key Laboratory for Corrosion and Protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015). A STUDY ON CORROSION BEHAVIOR OF REINFORCED REBAR IN SIMULATED PORE SOLUTION BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY (EIS). J Chin Soc Corr Pro, 1997, 17(1): 19-24.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1997/V17/I1/19

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