Strength of Materials

, Volume 51, Issue 1, pp 145–155 | Cite as

Influence of H2S Corrosion on Tensile Properties and Fracture Toughness of X80 Pipeline Steel

  • L. Gu
  • J. WangEmail author
  • C. B. Luan
  • X. Y. Li

Tensile and fracture properties of X80 pipeline steel were studied in a mimic petrochemical environment. X80 pipeline steel specimens were firstly exposed to air or H2S corrosive medium. Then their tensile properties and δ-∆a resistance curves were obtained in experiments. The influence of H2S corrosion on the X80 pipeline steel’s crack growth resistance curve, fracture toughness, and plastic work loss was analyzed. The comparison between the test results after two pretreatments indicates that there was no significant difference in the X80 pipeline steel’s ultimate tensile strength before and after H2S corrosion. But fracture elongation, area reduction and fracture toughness varied greatly (a substantial decrease in elongation and reduction of area). The crack growth resistance curve of the specimen in air was obviously higher than the crack growth resistance curve of the corroded one. Under stable crack growth stage, the crack initiation toughness δ 0.2BL of the specimen in air was 0.732 mm, 2.02 times that of the corroded one (0.364 mm). In the case of similar crack growth ∆a, the plastic work required in the crack growing process (UP) of the specimen in air was 2.29 times that of the H2S-corroded specimen (\( {U}_P^{\hbox{'}} \) ). H2S corrosion resulted in a significant reduction of the fracture toughness of X80 pipeline steel. Hence, H2S corrosion should be avoided in the process of natural gas transportation by pipelines, so as to protect the pipeline steel from toughness degradation.


X80 pipeline steel tensile properties resistance curve fracture toughness H2S corrosion 



This article is supported by National Key Research and Development Program of China (Project No. 2016YFC0801905-16).


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Mechanical Engineering and Applied Electronics TechnologyBeijing University of TechnologyBeijingChina

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