Effect of residual tensile stress on stress corrosion behavior of the base metal of x80 uoe pipe

Qingren Xiong, Daoxin Liu, Yanhua Li, Weiwei Zhang, Hongyuan Chen, Yang Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In order to investigate the role and mechanism of the residual stress on the stress corrosion behavior of the pipeline steel, SSRT test was adopted to study the stress corrosion behavior of the base metal of X80 UOE pipe with different residual tensile stress in the simulated soil solution NS4, electrochemical test techniques were adopted to test the effect of the residual stress on electrochemical polarization behavior and AC impedance characteristics of the base metal of X80 UOE pipe. It is shown that the residual tensile stress leads to the increase of the electrochemical activity and the reduction of impedance and electrochemical self-corrosion potential of the base metal surface of X80 UOE pipe, and it accelerates the nucleation and early propagation of the stress corrosion crack, which promotes the stress corrosion sensitivity of the base metal. The SCC sensitivity increases with the residual tensile stress increasing.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Offshore and Polar Engineering Conference, ISOPE 2013
Pages471-475
Number of pages5
StatePublished - 2013
Event23rd International Offshore and Polar Engineering Conference, ISOPE 2013 - Anchorage, AK, United States
Duration: 30 Jun 20135 Jul 2013

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Conference

Conference23rd International Offshore and Polar Engineering Conference, ISOPE 2013
Country/TerritoryUnited States
CityAnchorage, AK
Period30/06/135/07/13

Keywords

  • Residual tensile stress
  • Soil corrosion
  • Stress corrosion
  • X80 uoe pipe

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