Journal
MATERIALS & DESIGN
Volume 30, Issue 10, Pages 4088-4094Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2009.05.025
Keywords
Corrosion; Environmental performance; Microstructure; Ferrous metals and alloys
Categories
Funding
- National Sciences and Engineering Research Council of Canada (NSERC)
- ARAMCo
- CANMET
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Sulfide Stress Cracking (SSC) of API-X100 high strength low alloy steel was evaluated in NACE solution A at room temperature. The corrosion rate, utilizing electrochemical polarization techniques, in the solution was 97 mpy. Proof ring testing, per NACE TM-0177, generated an SSC threshold stress value of 46% of yield strength. SSC susceptibility was caused by the high corrosion rate which formed corrosion pits that acted as crack initiation sites on the metal surface and provided more hydrogen to migrate into the steel. In addition, the X100 inhomogeneous microstructure provided a high density of hydrogen traps which promoted hydrogen embrittlement. (C) 2009 Elsevier Ltd. All rights reserved.
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