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ZHONG Zhiheng, MO Yeqiang, ZHANG Kai, LIN Zhiyao, JIANG Manxuan, HUANG Xue'er, ZHOU Haijun. The Steel Corrosion Mechanism and Corrosion Rate Control in Concrete[J]. Journal of South China Normal University (Natural Science Edition), 2022, 54(1): 48-53. DOI: 10.6054/j.jscnun.2022008
Citation: ZHONG Zhiheng, MO Yeqiang, ZHANG Kai, LIN Zhiyao, JIANG Manxuan, HUANG Xue'er, ZHOU Haijun. The Steel Corrosion Mechanism and Corrosion Rate Control in Concrete[J]. Journal of South China Normal University (Natural Science Edition), 2022, 54(1): 48-53. DOI: 10.6054/j.jscnun.2022008
shu

The Steel Corrosion Mechanism and Corrosion Rate Control in Concrete

  • 1.

    College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China

  • 2.

    Guangdong Provincial Academy of Building Research Group Co., Ltd., Guangzhou 510500, China

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  • Received Date: May 31, 2021
  • Available Online: March 13, 2022
    Graphical Abstract
    • Abstract
  • The corrosion control mechanism and corrosion rate calculation method of rebar in concrete exposed to different test conditions were studied using polarization curve and electrochemical impedance spectroscopy. The results show that, under natural corrosion condition, the corrosion reaction process of rebar was controlled by the anodic reaction. The corrosion rate can be effectively calculated utilizing a modificative equation used to calculate the bidirectional linear polarization resistance. However, under accelerated corrosion condition, the corrosion reaction process of rebar was controlled by combined mechanism of electrochemical and concentration polarization. The polarization resistance with a relatively high accuracy can be obtained by fitting the weak polarization curve. The research results provide a reference for the judgment of corrosion mechanism and the control of corrosion rate of steel reinforcement in concrete structures.
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    • References (17)
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