Sulfide Stress Corrosion Cracking of Line Pipe

Kimura, Masao; Totsuka, Nobuo; Kurisu, T.; Amano, Keniti; Matsuyama, Junya; Nakai, Y.

doi:10.5006/1.3577866

Cited by 22 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There are several investigations on the SSC and HSC resistance of ferritic/pearlitic linepipe steel where cracks have been found at the boundary between pearlite and proeutectoid ferrite. [73][74][75] Moro et al 75 and Kimura et al 73 reported cracks along the ferrite/pearlite interfaces in banded microstructures parallel to the loading direction after SSRT and constant load tension tests, respectively. Chan and Charles 76 found hydrogen induced cracking (HIC) -cracking that results from the pressurization of trap sites by hydrogen, without external stress to the material 8 -along proeutectoid ferrite/pearlite boundaries when charging unloaded samples of homogenized high purity ferritic/pearlitic steel for 48 hours in H2S-saturated 5 wt% NaCl + 0.5 wt% acetic acid solution.…”

Section: Direct and Indirect Effects Of Ni Alloyingmentioning

confidence: 99%

Effect of Nickel on the Hydrogen Stress Cracking Resistance of Ferritic/Pearlitic Low Alloy Steels

et al. 2018

View full text Add to dashboard Cite

Nickel additions to low alloy steels improve mechanical and technological properties. However, part 2 of the ISO 15156 Standard limits the nickel content to a maximum of 1 wt% in oil and gas environments containing H2S due to 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 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.

show abstract

Section: Direct and Indirect Effects Of Ni Alloyingmentioning

confidence: 99%

Effect of Nickel on the Hydrogen Stress Cracking Resistance of Ferritic/Pearlitic Low Alloy Steels

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Grobner et al (1976) suggested that differences in hydrogen transport between bainite and martensite, higher segregation of impurities at lower cooling rates, and bainite's more heterogeneous microstructure could all play a role. Other authors suggested that the bainite-ferrite boundary in low-carbon steels is a favorable site for crack nucleation (Kimura et al, 1989). Differences in carbide distribution, according to Yoshino (1982), caused differences in hydrogen absorption and trapping.…”

Section: Bainite Resistance To Sscmentioning

confidence: 99%

“…In contrast, other irreversible traps, such as MnS and oxide interphases, are undesirable because they can act as potential flaws themselves (Chavane et al, 1986). Stringent maximum sulfur content limits and strict control of shape and distribution of inclusions is paramount for maximum SSC resistance (EFC, 2009;Kimura et al, 1989;NACE-ISO, 2001), e.g., API 6A Table 10 and API 5CT Tables C.5 (API, 2004(API, , 2010.…”

Section: Effect Of Nickel On Hydrogen Trappingmentioning

confidence: 99%

Sulfide stress cracking of nickel-containing low-alloy steels

et al. 2014

View full text Add to dashboard Cite

Low-alloy steels (LAS) are extensively used in oil and gas (O&G) production due to their good mechanical properties and low cost. Even though nickel improves mechanical properties and hardenability with low penalty on weldability, which is critical for large subsea components, nickel content cannot exceed 1-wt% when used in sour service applications. The ISO 15156-2 standard limits the nickel content in LAS on the assumption that nickel concentrations above 1-wt% negatively impact sulfide stress cracking (SSC) resistance. This restriction excludes a significant number of high-strength and high-toughness alloys, such as Ni-Cr-Mo (e.g., UNS G43200 and G43400), Ni-Mo (e.g., UNS G46200), and Ni-Cr-Mo-V grades, from sour service applications and can be used only if successfully qualified. However, the standard is based on controversial research conducted more than 40 years ago. Since then, researchers have suggested that it is the microstructure that determines SSC resistance, regardless of Ni content. This review summarizes the advantages and disadvantages of nickel-containing LAS in terms of strength, weldability, hardenability, potential weight savings, and cost reduction. Likewise, the state of knowledge on the effect of nickel on hydrogen absorption as well as SSC initiation and propagation kinetics is critically reviewed.

show abstract

“…All the found cracks in the different welding repair conditions agree with the theory proposed by the SOHIC mechanism; cracks formed parallel to the applied stress after link with cracks formed perpendicular to the direction of the applied stress, preferentially induced along the ICHAZ as is shown in Figure 8. Most of the failures reported by SSCC or SOHIC in welded line pipes of low and medium strength have occurred in the ICHAZ (Kimura, 1989;Endo, 1994). According to the applied stress acts to enhance shear stress around the first parallel formed cracks to the stress and the shear stress can cause local yielding which facilitates the vertical linking of the parallel cracks to break the specimen eventually.…”

Section: 1 Slow Strain Rate Tests Carried Out In Nace Solutionmentioning

confidence: 99%