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Evaluation of soil factors influencing corrosion of buried X70 pipeline steel

  • Ping Liang*
  • , Xiao Gang Li
  • , Cui Wei Du
  • , Zhi Yong Liu
  • , Xu Chen
  • , Jie Yu
  • *Corresponding author for this work
  • University of Science and Technology Beijing
  • Liaoning University of Petroleum and Chemical Technology

Research output: Contribution to journalArticlepeer-review

Abstract

Soil corrosion is one of the important factors for safe operation of buried X70 pipelines. The main environmental factors of soil corrosion for X70 and Q235 steels were determined using fuzzy clustering, and the order and weight of the main factors were investigated by means of grey relationship analysis and analytical hierarchy process methods. The calculation results showed that the weihgt of factors for the soil corrosion of X70 steel decreased in the following order: pH value (0. 4050) , water content (0. 2517) , conductivity (0. 1493) , salt content (0. 0868) , Cr- (0. 0501) , NO3- (0.0291), SO2-4 (0.0173), HCO3- (0.0107), and the results for Q235 steel were little different from those. These results provided some new reference data for establishing an evaluation method for soil corrosion of underground pipelines.

Original languageEnglish
Pages (from-to)526-530
Number of pages5
JournalCorrosion and Protection
Volume30
Issue number8
StatePublished - Aug 2009
Externally publishedYes

Keywords

  • Analytical hierarchy process
  • Fuzzy cluster
  • Grey relationship
  • Soil corrosion
  • X70 pipeline steel

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