Session: Corrosion, Fatigue, and External Stress Cracking Under Thermal Insulations
Stress corrosion cracking on carbon steel pipelines a look into testing methods (C2026-00180)
Wednesday, March 18, 2026
2:30 PM - 3:00 PM Central
Location: 370 EF
Earn .5 PDH
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Much like ageing, corrosion of metals is constantly occurring and inevitable, all we can do is slow down the corrosion rate. With stress corrosion cracking, the story is slightly different, the corrosion rate is not the primary focus, cracking can seemingly appear out of nowhere. Unlike surface corrosion, stress cannot always be detected by the naked eye, it’s often internal under the surface. Cases of external stress corrosion cracking on pipelines have been popping up over the years, frustrating owners. A race to determine a cause is ongoing and the testing has been evolving. This paper will compare the various test methods developed for external stress corrosion cracking under thermal insulation on carbon steel metals in relation to mineral wool with corrosion inhibitors as well as other types of insulation.
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