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Influence of moisture on corrosion behaviour of steel ground rods in mildly desertified soil

Jing Fu (School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, China)
Feng Pei (Jiangxi Electrical Power Research Institute, Nanchang, China)
Zhiping Zhu (School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, China)
Zhenghui Tan (School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, China)
Xu Tian (Jiangxi Electrical Power Research Institute, Nanchang, China)
Rongjun Mao (Jiangxi Electrical Power Research Institute, Nanchang, China)
Leijing Wang (School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 17 May 2013

271

Abstract

Purpose

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The purpose of this paper is to study the influence of moisture on corrosion behaviour of steel ground rods in mildly desertified soil and the mechanism behind it.

Design/methodology/approach

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The specimens were used for weight loss corrosion experiments and polarization scans were taken at different moisture levels. Specimen surfaces were characterized using a scanning electron microscope, energy dispersive spectrometer, and using X‐ray diffraction.

Findings

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The results indicated that the moisture content of the soil influenced steel corrosion considerably. The maximum corrosion of 20G and Q235 galvanised steels occurred at 10 per cent and 12.5 per cent soil moisture, respectively. The corrosion products of 20G steel were mostly Fe2O3 and Fe3O4, whereas that of Q235 galvanised steel was Zn5(OH)8Cl2 · H2O.

Originality/value

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The paper provides information regarding the relationship between moisture and corrosion of steel ground rods, which is useful for understanding the mechanism of soil corrosion. The research results can provide theoretical guidelines for preventing the corrosion of steel ground rods buried in mildly desertified soil.

Keywords

Citation

Fu, J., Pei, F., Zhu, Z., Tan, Z., Tian, X., Mao, R. and Wang, L. (2013), "Influence of moisture on corrosion behaviour of steel ground rods in mildly desertified soil", Anti-Corrosion Methods and Materials, Vol. 60 No. 3, pp. 148-152. https://doi.org/10.1108/00035591311315346

Publisher

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Emerald Group Publishing Limited

Copyright © 2013, Emerald Group Publishing Limited

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