Prediction of sulfide stress cracking in high-strength tubulars
- Nippon Steel Corp., Chiba (Japan). Steel Research Lab.
- Japan National Oil Corp., Chiba (Japan). Technical Research Center
It is important to systematically assess the severity of a sour environment for susceptibility to sulfide stress cracking (SSC). A prediction system was established based upon SSC as a phenomenon of hydrogen embrittlement (HE). The content of H entering into steel (H[sub Fe]) could be predicted from the hydrogen sulfide (H[sub 2]S) concentration and hydrogen ion (H[sup +]) concentration by the equation: H[sub Fe] (in ppm) = 13 [times] (H[sup +] [times] H[sub 2]S)[sup 0.26]. SSC failure stress decreased with increases in H[sub Fe] for any combination of pH and H[sub 2]S. A critical hydrogen content (H[sub c]) below which no SSC occurred decreased with increases in yield strength (YS) of a steel and could be formulated as a function of YS.
- OSTI ID:
- 7051993
- Journal Information:
- Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 50:7; ISSN 0010-9312; ISSN CORRAK
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CONCENTRATION RATIO
CORROSION
CORROSIVE EFFECTS
EMBRITTLEMENT
HYDROGEN COMPOUNDS
HYDROGEN EMBRITTLEMENT
HYDROGEN SULFIDES
IRON ALLOYS
IRON BASE ALLOYS
NATURAL GAS WELLS
OIL WELLS
PIPES
STEELS
STRESS CORROSION
SULFIDES
SULFUR COMPOUNDS
WELLS