Journal
CORROSION SCIENCE
Volume 52, Issue 11, Pages 3750-3756Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2010.07.025
Keywords
Steel; SEM; Cathodic protection; Pitting corrosion; Stress corrosion
Funding
- NSERC
- TransCanada Pipelines Limited
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A novel test setup has been used in this study to simulate stress corrosion cracking initiation under a disbonded coating on an X-65 pipeline steel. In this setup, the synergistic effects of cyclic loading, cathodic protection and soil solution environment under disbonded coatings have been considered. When the X-65 pipeline steel was exposed to the test environment, there existed a wide range of corrosion products on the steel surface in the gradient of cathodic protection. Increasing the test time and the maximum stress increased the possibility of stress corrosion cracking initiation in regions with a high susceptibility to pitting corrosion. (C) 2010 Elsevier Ltd. All rights reserved.
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