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International Journal of Corrosion
Volume 2016 (2016), Article ID 5808372, 13 pages
http://dx.doi.org/10.1155/2016/5808372
Research Article

Experimental Investigation on Corrosion Effect on Mechanical Properties of Buried Metal Pipes

1School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
2School of Engineering, RMIT University, Melbourne, VIC 3001, Australia

Received 20 June 2016; Revised 5 August 2016; Accepted 8 August 2016

Academic Editor: Flavio Deflorian

Copyright © 2016 Yingbo Hou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Corrosion has been found to be the most predominant cause for failures of buried metal pipes. A review of published literature on pipe corrosion reveals that little research has been undertaken on the effect of corrosion on mechanical properties of pipe materials and almost no research has been conducted on corrosion effect on fracture toughness. The intention of this paper is to present a comprehensive test program designed to investigate the effect of corrosion on mechanical properties of metals in soil. Two types of metals, namely, cast iron and steel, are tested under corrosion in three different environments. A relationship between corrosion and deterioration of mechanical property of metals is developed. It is found in the paper that the more acidic the environment is, the more corrosion the metal undergoes and that the corrosion reduces both the tensile strength and fracture toughness of the metal. The results presented in the paper can contribute to the body of knowledge of corrosion behavior and its effect on mechanical properties of metals in soil environment, which in turn enable more accurate prediction of failures of buried metal pipes.