Electrochemical processes controlling SCC of underground pipelines
Book
·
OSTI ID:106148
- Ohio State Univ., Columbus, OH (United States)
Electrochemical measurements and constant extension rate tests (CERT) of cold worked X 52 carbon steel showed that stress corrosion cracking (SCC) can be induced in aqueous sulfate, bicarbonate and simulated soil solutions at 50 C. The SCC susceptibility was a minimum near the corrosion potential (E{sub corr}) and increased as the cathodic potential increased. The SCC decreased at anodic potentials when general metal dissolution or passivation occurred. The cracking was mainly transgranular (TG) at E{sub corr} and at cathodic potentials. There is strong evidence that the SCC was caused by dissolved hydrogen in the metal.
- OSTI ID:
- 106148
- Report Number(s):
- CONF-950304--
- Country of Publication:
- United States
- Language:
- English
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