An Investigation on Stress Corrosion Cracking Behaviorof API-5L-X52 Steel in Near Neutral pH Solution

Subject Areas : journal of New Materials

M. جاویدی ¹ (استادیار بخش مهندسی مواد- دانشگاه شیراز.)
S. بهاءلو هوره ² (دانشجوی کارشناسی ارشد خوردگی و حفاظت، بخش مهندسی مواد، دانشگاه شیراز.)

Received: 2014-09-07 Accepted : 2014-09-07 Published : 2014-11-22

Keywords: X52, Stress Corrosion Cracking, Near-Neutral pH, Cathodic Protection, Slow Strain Rate Test, Potentiodynamic Polarisation,

Abstract :

Stress corrosion cracking behavior of X52 pipeline steel was investigated in a near neutral pH solution by slow strain rate test, potentiodynamic polarization and surface analysis technique. Potentiodynamic polarization tests were performed at fast and slow potential sweep rates, to simulate crack tip and crack wall roles in the SCC process. The results showed that the dominant mechanism of SCC at relatively low and moderate applied potentials is anodic dissolution mechanism. While, at more cathodic applied potentials hydrogen based mechanism was the dominant one.