Corrosion behavior of low alloy steels in a wet–dry acid humid environment

Qing-he Zhao; Wei Liu; Jian-wei Yang; Yi-chun Zhu; Bin-li Zhang; Min-xu Lu

doi:10.1007/s12613-016-1325-x

Volume 23 Issue 9

Sep. 2016

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International Journal of Minerals, Metallurgy and Materials > 2016 > 23(9): 1076-1086. > DOI: 10.1007/s12613-016-1325-x

Qing-he Zhao, Wei Liu, Jian-wei Yang, Yi-chun Zhu, Bin-li Zhang, and Min-xu Lu, Corrosion behavior of low alloy steels in a wet–dry acid humid environment, Int. J. Miner. Metall. Mater., 23(2016), No. 9, pp.1076-1086. https://dx.doi.org/10.1007/s12613-016-1325-x

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Corrosion behavior of low alloy steels in a wet–dry acid humid environment

Qing-he Zhao¹⁾,
Wei Liu^1), ,,
Jian-wei Yang²⁾,
Yi-chun Zhu¹⁾,
Bin-li Zhang¹⁾ and
Min-xu Lu¹⁾

Author Affilications

Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
Shougang Research Institute of Technology, Beijing, 100043, China

Funds:

The authors thank for the funding support from the National Natural Science Foundation of China (No. 51571027).

Received: 15 February 2016; Revised: 09 May 2016; Accepted: 10 May 2016; Available Online: 09 June 2021

Graphical Abstract

Abstract

Abstract

The corrosion behavior of corrosion resistant steel (CRS) in a simulated wet–dry acid humid environment was investigated and compared with carbon steel (CS) using corrosion loss, polarization curves, X-ray diffraction (XRD), scanning electron microscopy (SEM), electron probe micro-analysis (EPMA), N₂ adsorption, and X-ray photoelectron spectroscopy (XPS). The results show that the corrosion kinetics of both steels were closely related to the composition and compactness of the rust, and the electrochemical properties of rusted steel. Small amounts of Cu, Cr, and Ni in CRS increased the amount of amorphous phases and decreased the content of γ-FeOOH in the rust, resulting in higher compactness and electrochemical stability of the CRS rust. The elements Cu, Cr, and Ni were uniformly distributed in the CRS rust and formed CuFeO₂, Cu₂O, CrOOH, NiFe₂O₄, and Ni₂O₃, which enhanced the corrosion resistance of CRS in the wet–dry acid humid environment.
- low alloy steel,
- steel corrosion,
- rust,
- polarization curves,
- corrosion resistance

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