Initiation of stress corrosion cracking for pipeline steels in a carbonate-bicarbonate solution

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/BF02652362· OSTI ID:382520

Wang, Z F; Atrens, A ^[1]

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1. Univ. of Queensland, Brisbane, Queensland (Australia). Dept. of Mining and Metallurgical Engineering

The linearly increasing stress test (LIST) was used to study the stress corrosion cracking (SCC) behavior of a range of pipeline steels in carbonate-bicarbonate solution under stress rate control at different applied potentials. Stress corrosion cracking, at potentials below {minus}800 mV(SCE), was attributed to hydrogen embrittlement. Stress corrosion cracking, in the potential range from about {minus}700 to {minus}500 mV(SCE), was attributed to an anodic dissolution mechanism. In the anodic potential region, the SCC initiation stress was larger than the yield stress and was associated with significant plastic deformation at the cracking site. The relative SCC initiation resistance decreased with increasing yield strength. In the cathodic potential region, the SCC initiation stress was smaller than the yield stress of steel; it was approximately equal to the stress at 0.1 pct strain ({sigma}{sub 0.1 pct}) for all the steels. The original surface was more susceptible to SCC initiation than the polished surface.

• Sponsoring Organization: USDOE
• OSTI ID: 382520
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 9 Vol. 27; ISSN MMTAEB; ISSN 1073-5623
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
36 MATERIALS SCIENCE
CHEMICAL COMPOSITION
CRACK PROPAGATION
CRACKS
DEFORMATION
DISSOLUTION
ELECTRIC POTENTIAL
FRACTURE PROPERTIES
HYDROGEN EMBRITTLEMENT
MECHANICAL PROPERTIES
NATURAL GAS INDUSTRY
PETROLEUM REFINERIES
PIPELINES
STEELS
STRESS CORROSION
STRESSES
TEMPERATURE DEPENDENCE