Influence of Key Parameters on NACE Standard TM0177 DCB Sour Gas Test

Moderer, Luca; Holzer, Christoph; Mori, Gregor; Klösch, Gerald; Klarner, Jürgen; Sonnleitner, Robert

doi:10.1007/s00501-013-0178-0

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…A similar trend for the effect of arm displacement on the KISSC value was reported by Linne et al [176], Sponseller [165], and Asahi et al [173]. Also, Moderer et al [177] investigated the influence of arm displacement, initial crack length, pre-cracking, and notch type (slot with a chevron or an electro-discharged machine slot (EDM)) on the KISSC values. The results showed minor sensitivity of KISSC to the notch type and pre-cracking, but a higher number of valid specimens were attained for EDM-notched specimens.…”

Section: Double Cantilever Beam Testsupporting

confidence: 70%

Hydrogen Impact: A Review on Diffusibility, Embrittlement Mechanisms, and Characterization

Li,

Ghadiani,

Jalilvand

et al. 2024

Materials

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Hydrogen embrittlement (HE) is a broadly recognized phenomenon in metallic materials. If not well understood and managed, HE may lead to catastrophic environmental failures in vessels containing hydrogen, such as pipelines and storage tanks. HE can affect the mechanical properties of materials such as ductility, toughness, and strength, mainly through the interaction between metal defects and hydrogen. Various phenomena such as hydrogen adsorption, hydrogen diffusion, and hydrogen interactions with intrinsic trapping sites like dislocations, voids, grain boundaries, and oxide/matrix interfaces are involved in this process. It is important to understand HE mechanisms to develop effective hydrogen resistant strategies. Tensile, double cantilever beam, bent beam, and fatigue tests are among the most common techniques employed to study HE. This article reviews hydrogen diffusion behavior, mechanisms, and characterization techniques.

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Section: Double Cantilever Beam Testsupporting

confidence: 70%

Hydrogen Impact: A Review on Diffusibility, Embrittlement Mechanisms, and Characterization

Li,

Ghadiani,

Jalilvand

et al. 2024

Materials

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“…Therefore, solubility of hydrogen p H increases with the increase of either hydrogen pressure or temperature. Also, with the increase of temperatures, the hydrogen diffusion coefficient increases (Moderer et al, 2013), while the solubility of H 2 S in water decreases. Therefore, it is confirmed ambient temperature as the most critical temperature regarding hydrogen embrittlement in H 2 S environments (Szklarz, 1998); hence, sour gas tests conducted at room temperature are aggressive enough to evaluate the material 2003).…”

Section: Figure 4 Effect Of Temperature and Co Partial Pressure On The Corrosion Ratementioning

confidence: 99%

“…Those sites where hydrogen is accumulated are called "hydrogen traps" with higher hydrogen binding energy than the lattice (Beck et al, 1966). Traps are generally referred to lattice defects such as vacancies, dislocations, grain boundaries (Moderer et al, 2013) or microstructural features such as second phase interfaces (Sourmail and Park, 2006). In addition to atomic hydrogen, the presence of tensile stresses is recognized as the other required factor for SSC.…”

Section: Figure 4 Effect Of Temperature and Co Partial Pressure On The Corrosion Ratementioning

confidence: 99%

“…Effects of mechanical properties and SSC-resistant properties have been investigated by many authors (Cancio et al, 2010). As shown in Figure 11, the SSC resistance, expressed in terms of a critical stress intensity factor KISSC (Standard, 2005;Moderer et al, 2013), drastically decreases as the mechanical resistance increases. That's the reason why ISO 15156 places hardness restrictions on these alloys.…”

Section: Selection Of Appropriate Corrosion-resistant Materialsmentioning

confidence: 99%

“…It is recommended to apply low-grade and thick-wall OCTG in a sour service condition (Sun et al, 2012). Moreover, a decrease of KISSC in cold deformed materials can also be observed (Cancio et al, 2010;Moderer et al, 2013), because the dislocation density will be increased by cold working, resulting in a higher number of hydrogen traps as mentioned above. Therefore, the development of LAS with high mechanical properties as well as good resistance to SSC is an important and challenging aim.…”

Section: Selection Of Appropriate Corrosion-resistant Materialsmentioning

confidence: 99%

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Corrosion problems in the oil country tubular goods and their mitigation – a review

Cao¹,

He²,

Gao³

2017

ACMM

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Purpose Important reserves of oil and gas, which are left to be discovered and produced, are mainly concentrated in challenging locations and under severe conditions such as high pressure (HP)/high temperature (HT). The presence of aggressive environments including H2S, CO2 and chlorides plus HP/HT causes a series of corrosion problems, which cost the oil industry billions of dollars a year. Thus, there is an increasing challenge for tubes (i.e. oil country tubular goods, for short, OCTG) used in producing oil and gas. The purpose of this study is to summarize different kinds of corrosion problems and their mitigation, to more efficiently protect OCTG from corrosion. Design/methodology/approach To effectively select proper mitigation methods, the mechanism of corrosion must be understood, which can be classified into four categories: sweet corrosion, sour corrosion, galvanic corrosion and microbiologically induced corrosion. Also, the effects of environmental and material factors on the corrosion rate are presented. Subsequently, current technology of mitigating these corrosion problems has been discussed, including the development of materials, application of chemical inhibitors and application of protective layers. Findings It is stressed that limits exist for each individual mitigation method; therefore, a careful balance between economic life of OCTG and safety in operation is required. Originality/value The main purpose of this essay is to give a brief review and detailed introduction and analysis about those technologies.

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References

2021

Drilling Engineering

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Influence of Key Parameters on NACE Standard TM0177 DCB Sour Gas Test

Cited by 4 publications

References 2 publications

Hydrogen Impact: A Review on Diffusibility, Embrittlement Mechanisms, and Characterization

Hydrogen Impact: A Review on Diffusibility, Embrittlement Mechanisms, and Characterization

Corrosion problems in the oil country tubular goods and their mitigation – a review

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