Nickel additions to low alloy steels improve mechanical and technological properties. However, Part 2 of ISO Standard 15156 limits the nickel content to a maximum of 1 wt% in oil and gas environments containing H2S because of controversial concerns regarding sulfide stress cracking. The objective of this work was to investigate the effect of nickel in solid solution in the ferrite phase on hydrogen stress cracking resistance. Ferritic/pearlitic research-grade low alloy steels with nominal nickel contents of 0, 1, 2, and 3 wt% were tested by the slow strain rate test method with cathodic hydrogen charging to −1.05 VAg/AgCl and −2 VAg/AgCl. No difference in fracture mode or morphology was found between the alloys. However, the plastic elongation ratios and reduction in area ratios decreased with increasing nickel content when tested at −2 VAg/AgCl. The direct and indirect effects of nickel, such as the influence of an increasing fraction of pearlite with increasing nickel content, are discussed.
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1 July 2018
Research Article|
March 05 2018
Effect of Nickel on the Hydrogen Stress Cracking Resistance of Ferritic/Pearlitic Low Alloy Steels Available to Purchase
Hans Husby;
Hans Husby
‡
*Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway.
‡Corresponding author. E-mail: [email protected].
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Philip Wagstaff;
Philip Wagstaff
*Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway.
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Mariano Iannuzzi;
Mariano Iannuzzi
*Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway.
**GE Oil & Gas, 1338 Sandvika, Norway. Currently at Curtin University, Bentley, Australia.
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Roy Johnsen;
Roy Johnsen
*Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway.
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Mariano Kappes
Mariano Kappes
***Instituto Sabato, Universidad Nacional de San Martín (UNSAM) – Comisión Nacional de Energía Atómica (CNEA), San Martín, Buenos Aires, Argentina.
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‡Corresponding author. E-mail: [email protected].
Online ISSN: 1938-159X
Print ISSN: 0010-9312
© 2018, NACE International
2018
CORROSION (2018) 74 (7): 801–818.
Citation
Hans Husby, Philip Wagstaff, Mariano Iannuzzi, Roy Johnsen, Mariano Kappes; Effect of Nickel on the Hydrogen Stress Cracking Resistance of Ferritic/Pearlitic Low Alloy Steels. CORROSION 1 July 2018; 74 (7): 801–818. https://doi.org/10.5006/2724
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