Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 48, Issue -, Pages 127-129Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2014.08.016
Keywords
Square wave polarization; Stress corrosion cracking; Non-stable electrochemistry
Categories
Funding
- National High-tech R&D Program of China [2012AA040105]
- Chinese National Science Foundation [51131001]
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In this work, the square wave polarization (SWP) technique and slow strain rate tensile test were combined to investigate the influence of cathodic potential fluctuation, i.e. the non-stable cathodic polarization, on the electrochemical and stress corrosion cracking (SCC) behavior of X80 pipeline steel in an acidic soil solution. It was found that the non-stable cathodic polarization accelerated both the anodic dissolution and the cathodic hydrogen evolution, inducing the increase of SCC susceptibility compared with the potentiostatic cathodic polarization. This provides a novel and important concern and recommendation for controlling pipeline SCC under CP fluctuation. (C) 2014 Elsevier B.V. All rights reserved.
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