Hydrogen accumulation and hydrogen-induced cracking of API C90 tubular steel

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Corrosion

DOI:https://doi.org/10.5006/1.3290260· OSTI ID:543525

Yu, G H; Cheng, Y H; Chen, L; Qiao, L J; Wang, Y B; Chu, W Y ^[1]

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1. Univ. of Science and Technology, Beijing (China). Dept. of Materials Physics

A study was undertaken of hydrogen accumulation on grain boundaries, at inclusions, and near a kneaded notch tip; the susceptibility for blistering; and hydrogen-induced cracking (HIC) of tubular steels (API C90). Results showed the accumulation coefficients of hydrogen on the grain boundaries, various inclusions, and near the loaded notch tip were 2.2 to 11, 8 to 20, and 2.5 to 4.5, respectively. The threshold hydrogen concentration for blistering and the threshold stress in three tubular steels were 1.8 ppm and 397 MPa for SM90 steel, 4.3 ppm and 497 MPa for SM95 steel, and 8.3 ppm and 528 MPa for the C90 steel. The threshold stress intensity for HIC (K{sub IH}) in the C90 steel was K{sub IH} (MPa{radical}m) = 46 {minus} 12.5 InC{sub 0} (ppm), where C{sub 0} is the concentration of diffusible hydrogen.

• Sponsoring Organization: USDOE
• OSTI ID: 543525
• Journal Information: Corrosion, Journal Name: Corrosion Journal Issue: 10 Vol. 53; ISSN 0010-9312; ISSN CORRAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CONCENTRATION RATIO
CRACKS
GRAIN BOUNDARIES
HYDROGEN EMBRITTLEMENT
INCLUSIONS
INTERFACES
PIPES
STEELS
STRESS INTENSITY FACTORS