Jing Mingand Jin-jie Shi, Chloride resistance of Cr-bearing alloy steels in carbonated concrete pore solutions, Int. J. Miner. Metall. Mater., 27(2020), No. 4, pp. 494-504. https://doi.org/10.1007/s12613-019-1920-8
Cite this article as:
Jing Mingand Jin-jie Shi, Chloride resistance of Cr-bearing alloy steels in carbonated concrete pore solutions, Int. J. Miner. Metall. Mater., 27(2020), No. 4, pp. 494-504. https://doi.org/10.1007/s12613-019-1920-8
Research Article

Chloride resistance of Cr-bearing alloy steels in carbonated concrete pore solutions

+ Author Affiliations
  • Corresponding author:

    Jin-jie Shi    E-mail: jinjies@126.com

  • Received: 6 May 2019Revised: 13 October 2019Accepted: 16 October 2019Available online: 18 January 2020
  • The effect of carbonation on the chloride resistance of low-carbon steel and two Cr-bearing alloy steels in simulated concrete pore solutions was investigated. The chloride threshold values of steels were determined on the basis of corrosion potential (Ecorr) and polarization resistance (Rp). Moreover, the chloride-induced corrosion behavior of steels was evaluated using electrochemical impedance spectroscopy, cyclic voltammetry, cathodic potentiodynamic polarization, and scanning electron microscopy/energy dispersive X-ray spectroscopy measurements. Alloy steels have higher chloride resistance than low-carbon steel in carbonated and non-carbonated concrete pore solutions. The chloride resistance of alloy steels improves with increasing Cr content. In addition, the chloride resistance of all steels is negatively affected by the carbonation of concrete pore solution, especially for alloy steel with high Cr content in the presence of high chloride content.

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