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

Jing Ming; Jin-jie Shi

doi:10.1007/s12613-019-1920-8

Volume 27 Issue 4

Apr. 2020

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > 27(4): 494-504

Jing Ming and 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

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Jing Ming and 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

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Research Article

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

Jing Ming and
Jin-jie Shi

+ Author Affiliations

Corresponding author:
Jin-jie Shi E-mail: jinjies@126.com
Received: 6 May 2019; Revised: 13 October 2019; Accepted: 16 October 2019; Available online: 18 January 2020

Abstract

Abstract

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 (E_corr) and polarization resistance (R_p). 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.
- alloy steel;
- concrete pore solution;
- carbonation;
- chloride resistance;
- electrochemical measurements

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