ACCELERATED SIMULTANEOUS DETERMINATION OF CHLORIDE DEPASSIVATION THRESHOLD OF REBAR IN CONCRETE

J Chin Soc Corr Pro

2012, Vol. 32

Issue (3): 223-227 DOI:

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ACCELERATED SIMULTANEOUS DETERMINATION OF CHLORIDE DEPASSIVATION THRESHOLD OF REBAR IN CONCRETE

JIN Weiliang, YUE Zengguo, XU Chen, LI Zhiyuan

Institute of Structural Engineering, Zhejiang University, Hangzhou 310058

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Abstract Based on metal polarization theory, the influence of external electric field voltage on the passive film of reinforcement was studied through experimental analysis. By defining the reasonable value of the voltage applied by electric field, discrimination method of steel depassivition under continuous de-energized condition was proposed. An rapid test to determine chloride threshold under field conditions was designed, for comparison, a normal test to determine chloride threshold by the natural chloride penetration was also carried out correspondingly. The results showed that chloride threshold determined by rapid test was slightly smaller than the value determined by the natural penetration test, the ratio was about 1.261, which verified the feasibility of this test method.

Key words: chloride threshold passivation depassivation electrochemistry EIS accelerated field

Received: 30 March 2011

ZTFLH:

TG174.3

Corresponding Authors: XU Chen E-mail: alan20612114@zju.edu.cn

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JIN Weiliang, YUE Zengguo, XU Chen, LI Zhiyuan. ACCELERATED SIMULTANEOUS DETERMINATION OF CHLORIDE DEPASSIVATION THRESHOLD OF REBAR IN CONCRETE. J Chin Soc Corr Pro, 2012, 32(3): 223-227.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I3/223

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