Study on the corrosion mechanism of the oxide scale on hot rolled steel in an atmospheric environment
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 9 August 2019
Issue publication date: 22 August 2019
Abstract
Purpose
The purpose of this paper is to understand the process of failure of scale and the corrosion resistance of scale to the substrate in an atmospheric environment.
Design/methodology/approach
The corrosion behaviour of X65 pipeline steel with different types of oxide scale was analysed using the natural environment exposure corrosion test, scanning electron microscopy analysis, electrochemical corrosion polarization curve test and other methods in a warehouse environment.
Findings
The results of this research show that one type of oxide scale, which is rough, has an uneven microstructure, and exhibits weak adhesion to the matrix, does not protect the substrate from corrosion. Conversely, the uniform, dense oxide scale, which exhibits strong adhesion to the matrix, provides effective protection to the steel. However, as the corrosion develops, the corrosion rate of the substrate tends to accelerate, especially when the structure of the oxide scale is damaged to a certain extent.
Originality/value
The corrosion mechanism of the oxide scale on hot rolled steel in an atmospheric environment has been proposed.
Keywords
Acknowledgements
The authors acknowledge the support of the National Key Research and Development Program of China (No.2016YFB0300604) and the National Natural Science Foundation of China (No. 51671028).
Citation
Cai, J., Cheng, X., Zhao, B., Chen, L., Fan, Y., Dai, Q., Ma, H. and Li, X. (2019), "Study on the corrosion mechanism of the oxide scale on hot rolled steel in an atmospheric environment", Anti-Corrosion Methods and Materials, Vol. 66 No. 5, pp. 613-620. https://doi.org/10.1108/ACMM-03-2019-2102
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited