A comparative study on the corrosion behavior of Q235 steel in saturated acidic red and yellow soils
Abstract
Purpose
The purpose of this paper is to study the corrosion behavior of Q235 steel in saturated acidic red and yellow soils.
Design/methodology/approach
The corrosion behavior of Q235 steel in saturated red and yellow soils was compared by weight-loss, SEM/EDS, 3D ultra-depth microscopy and electrochemical measurements.
Findings
Rp of the steel gradually increases and icorr gradually decreases in both the red and yellow soils with time. The Rp of the steel in the red soil is lower, but its icorr is higher than that in the yellow soil. The uniform corrosion rate, diameter and density of the corrosion pit on the steel surface in the red soil are greater than those in the yellow soil. Lower pH, higher contents of corrosive anions and high-valence Fe oxides in the red soil are responsible for its higher corrosion rates and local corrosion susceptibility.
Originality/value
This paper investigates the difference in corrosion behavior of carbon steel in saturated acidic red and yellow soils, which can help to understand the mechanism of soil corrosion.
Keywords
Acknowledgements
This work is financially supported by the Provincial Key R&D Program of Hunan, China (2021GK2008), Science and Technology Program of State Grid (China) (5200-202016471A-0–0-00) and the National Scholarship Foundation (No. 202008430013).
Citation
Li, Y., Liu, L., Wang, J., Xu, S., Su, H., Xie, Y. and Wu, T. (2023), "A comparative study on the corrosion behavior of Q235 steel in saturated acidic red and yellow soils", Anti-Corrosion Methods and Materials, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/ACMM-03-2023-2775
Publisher
:Emerald Publishing Limited
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