Analysis of cracks origin behaviors during sulfide stress corrosion (SSC) in HSLA steel at different temperatures by electrochemical noise

Li, Xiaohua; Liu, Chenxi; He, Biao; Lv, Chuantao; Gao, Zhiming; Liu, Yongchang

doi:10.1007/s42243-021-00704-0

Cited by 5 publications

(3 citation statements)

References 38 publications

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“…The circumferential fracture exhibited more dendritic bifurcation at its end, and the crack propagation displayed obvious inter-granular and trans-granular brittle characteristics, which were consistent with stress corrosion cracking [19,20]. The initial depth of the microcrack at the top of the pipeline was 0.755 mm, and the micro-morphology of the crack surface exhibited quasi-cleavage with accompanying secondary cracks, indicating a brittle fracture [21,22].…”

Section: Comprehensive Analysissupporting

confidence: 53%

Failure Causes Analysis of Circumferential Cracking on Gathering Pipeline in M Oil and Gas Field

Zhao,

Zhang,

et al. 2024

Coatings

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The gathering and transportation pipeline experienced corrosion cracking failure after 2 years of operation. This paper conducted an analysis on the reasons for the pipeline failure by integrating background information on its usage, as well as observations, analyses, and detection of the morphology of failure samples. The results indicated that the fracture originated from the inner wall of the pipeline and extended to the outer wall along the wall thickness until complete fracture occurred. Based on microstructure analysis of the fracture and original microcracks at the top of the pipeline, it was determined that the fracture was a multi-source brittle fracture, spreading in both inter-granular and trans-granular forms with obvious radial quasi-cleavage fractures accompanied by secondary cracks. EDS analysis revealed that the element S was present in all zones related to fracture initiation, spreading, and transient zones. XRD analysis showed that corrosion products on the fracture surface were mainly composed of FeS, indicating the presence of H2S in the service environment leading to sulfide stress corrosion cracking characteristics in line with pipeline failure. It is recommended to confirm the source of H2S in the service medium and test residual stress within the same pipeline for potential risk assessment regarding cracking in other areas.

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Section: Comprehensive Analysissupporting

confidence: 53%

Failure Causes Analysis of Circumferential Cracking on Gathering Pipeline in M Oil and Gas Field

Zhao,

Zhang,

et al. 2024

Coatings

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“…Furthermore, the max pit depth increased rapidly, enlarging 265.76% on the 15th day comparing with that on the 10th day, and then reached 131.91 μm on the 30th day. Therefore, during 15-30 days of this experiment, the pitting pits of 15CrMo steel were more obvious, and continued to develop, showing that the corrosion degree was seriously deepened [18][19][20][21].…”

Section: Development Of Corrosion Pitsmentioning

confidence: 83%

Study on failure evolution of 15CrMo steel used for aviation kerosene hydrogenation unit

Liu

Wang

Cui

et al. 2023

Mater. Res. Express

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In aviation kerosene hydrogenation unit, the 15CrMo steel with good resistance to hydrogen embrittlement performed obvious pitting corrosion with certain micro-cracks in H2/H2S environment. In this paper, the failure behavior of 15CrMo steel in H2/H2S environment had been studied using electrochemical method and microscopic morphology. The results showed that within 10 days, the 15CrMo steel performed good resistance with a smaller max pit depth (15.48 μm on the 10th day) in H2/H2S environment, proved by the passivation zone (-0.75~-0.62 V on 10th day). Furthermore, 15CrMo steel exhibited activated corrosion with a significantly increasing max pit depth and corrosion current density, especially, reaching 131.91 μm and 17.29 μA/m2 on 30th day. Moreover, the stress corrosion cracking caused by H2S appeared on 30th day.

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“…When temperature increases from 298.15 K to 353.15 K at a fixed partial pressure of H 2 S of 1 MPa, the corrosion rate generally decreases due to the increase in the amount of S and compactness of sulfide layers formed. [ 105,106 ] This in turn decreases the hydrogen permeation flux despite increasing the diffusivity of hydrogen through the material. [ 100 ] However, this statement is the opposite from work done by Wang et al, [ 107 ] which shows increasing hydrogen permeation flux as temperature increases from 303.15 to 313.15 K, when partial pressure of H 2 S was fixed at 0.1 MPa.…”

Section: Environmental Factors Influencing Sscmentioning

confidence: 99%

A Review of the Factors That Can Increase the Risk of Sulfide Stress Cracking in Thermomechanical Controlled Processed Pipeline Steels

Hiew Sze Kei,

van Haaften,

Britton

et al. 2023

Adv Eng Mater

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This review aims to improve our understanding of the important factors which influence the susceptibility of thermomechanical controlled processed (TMCP) steels to sulfide stress cracking (SSC). Mechanisms involved in hydrogen embrittlement (HE) from three perspectives are focused on: the microstructure constituents of TMCP steels; environmental factors; and fracture mechanism of SSC. Microstructures are reviewed as they affect the diffusion and trapping of hydrogen that can reduce the resistance to fracture. Environmental factors discussed highlight that when exposed to an aqueous H2S environment, a sulfide layer can form and influence the ingress of hydrogen, and this is affected by pH, temperature, and H2S partial pressure. Fracture is influenced by the nature of the crack tip and the crack tip plastic zone during crack propagation, and hydrogen can significantly affect crack tip growth. This review provides a critical assessment of the interplay between these three factors and aims to provide understanding to enhance our engineering approaches to manage and mitigate against fracture of TMCP steels.

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Analysis of cracks origin behaviors during sulfide stress corrosion (SSC) in HSLA steel at different temperatures by electrochemical noise

Cited by 5 publications

References 38 publications

Failure Causes Analysis of Circumferential Cracking on Gathering Pipeline in M Oil and Gas Field

Failure Causes Analysis of Circumferential Cracking on Gathering Pipeline in M Oil and Gas Field

Study on failure evolution of 15CrMo steel used for aviation kerosene hydrogenation unit

A Review of the Factors That Can Increase the Risk of Sulfide Stress Cracking in Thermomechanical Controlled Processed Pipeline Steels

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