Mechanisms of High-pH and Near-Neutral-pH SCC of Underground Pipelines

[+] Author and Article Information
John A. Beavers, Brent A. Harle

CC Technologies, Dublin, OH 43016

J. Offshore Mech. Arct. Eng 123(3), 147-151 (Mar 21, 2001) (5 pages) doi:10.1115/1.1376716 History: Received March 02, 1999; Revised March 21, 2001
Copyright © 2001 by ASME
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Grahic Jump Location
Potentiodynamic polarization curves for mild steel at 90°C in 1N Na2CO3–1N NaHCO3 at two scan rates, showing the potential range over which SCC occurs; after 5
Grahic Jump Location
Potential – pH region where SCC was found for line pipe steels in carbonate-bicarbonate solutions at 75°C; after 5
Grahic Jump Location
Anodic potentiodynamic polarization curve for X-65 line pipe steel at 35°C in a simulated near-neutral pH cracking electrolyte (NS4) sparged with gas containing 5 percent CO2–95 percent N2; scan rate 0.17 mV/s; after 10




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