Corrosion Behavior of 2507 Super Duplex Stainless Steel in H2S-Free and H2S-Containing Acidic Environments

Zhang, Guohui; Jin, Jie; Wang, Zhu; Ren, Yi; Zhang, Lei

doi:10.1007/s11665-022-07163-y

Cited by 5 publications

(4 citation statements)

References 58 publications

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“…Generally speaking, with the increase of experiment time, the potential (corrosion potential, E corr , and opencircuit potential, E OCP ) and corrosion current density (I corr ) gradually increased, indicating that the corrosion rate of 15CrMo steel was accelerated [24]. In detail, the polarization curves of 15CrMo steel on 1st and 3rd day basically coincided, and there was an obvious passivation region in the anode segment of these polarization curves, in which the passivation potential and over-passivation potential were −0.90 V and −0.65 V, respectively [25][26][27]. Furthermore, the polarization curve still showed obvious anode passivation zone on the 10th day, as shown in figure 4(b).…”

Section: Electrochemical Analysismentioning

confidence: 93%

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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Section: Electrochemical Analysismentioning

confidence: 93%

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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“…[ 1–5 ] As compared with 2205 DSS, 2507 super DSS (SDSS) exhibits better mechanical properties and higher corrosion resistance. [ 6–13 ] Consequently, 2507 SDSS is effectively used in many areas such as desulfurization and denitrification equipment for large ships, pumps and valves, containers, and pipes for the storage and transportation of oil and gas. [ 14–18 ]…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] As compared with 2205 DSS, 2507 super DSS (SDSS) exhibits better mechanical properties and higher corrosion resistance. [6][7][8][9][10][11][12][13] Consequently, 2507 SDSS is effectively used in many areas such as desulfurization and denitrification equipment for large ships, pumps and valves, containers, and pipes for the storage and transportation of oil and gas. [14][15][16][17][18] Cr 2 N and the chi, Laves, and sigma phases may be present in 2507 SDSS continuous casting (CC) slabs and hot-rolled black coils after aging treatments.…”

mentioning

confidence: 99%

Sigma‐Phase Distribution in 2507 Super Duplex Stainless Steel Continuous Casting Slabs

Chen,

Qiao,

Cheng

et al. 2023

steel research int.

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The sigma‐phase distribution in a 2507 super duplex stainless steel continuous casting slab is analyzed using microstructural analyses and thermodynamic calculations. The sigma phase contains high Cr and Mo contents, and precipitates along the phase boundary between austenite and ferrite and grows toward the interior of the ferrite phase in the continuously cast slab. The sigma‐phase fraction at the center of the width direction is higher than that in the one fourth width. Furthermore, the sigma‐phase fraction at the center of the thickness direction is higher than those at the upper and lower surfaces, which is due to the lower cooling rate at the center. The Brinell hardness (HB) at the center increases to 313 HB with an increasing sigma‐phase fraction. The sigma‐phase fraction at the one fourth thickness near the lower surface is higher than that at the one fourth thickness near the upper surface at the same cooling rate. Additionally, Mo and Ni are severely segregated in this zone. A higher Mo content influences the precipitation and stabilization of the sigma phase. Furthermore, Scheil–Gulliver calculations indicate that compositional segregation results in an increase in the sigma‐phase precipitation temperature range.

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“…On the other hand, SAF 2507 has good performance in all aspects, but it is more expensive to completely replace 316L to make pipes, so replacing SAF 2507 with SAF 2507 in some key parts can reduce the cost. Due to the dual-phase nature of SAF 2507 (50% austenite and 50% ferrite), the presence of austenite phase improves toughness, while the presence of ferrite phase improves yield strength and reduces stress corrosion cracking or hot cracking, so SAF 2507 performs excellent in strength, toughness and corrosion resistance [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Optimization of plasma arc welding process parameters of SAF 2507/316L dissimilar steel based on response surface method

Hong,

Huang,

et al. 2023

Weld World

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As a tubing adapter for submarine oil and gas development, super duplex stainless steel usually needs to be connected with other different metals. In the welding process, the welding parameters have a great influence on the stress and deformation of the welded joint. Since there are many welding parameters and the welding parameters interact with each other, changing one parameter requires changing one or more parameters to produce the expected results. Therefore, it is not easy to find an optimal parameter combination to meet the assembly requirements and improve the joint quality. Based on the response surface method, this paper mainly evaluates the influence of welding current, welding voltage and welding speed on the equivalent stress and overall deformation of SAF 2507/316L plasma arc welded joints. The regression model equations of equivalent stress and overall deformation with respect to welding parameters are obtained. The optimal predicted welding parameters output from the regression equation are very close to the simulated values. The Simufact Welding software was used for numerical simulation, and the influence of parameter combinations based on response surface test design on the transverse, longitudinal and Z-direction deformation of SAF 2507/316L plasma arc welded joints was studied. The accuracy of the simulation results was verified by experiments.

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Corrosion Behavior of 2507 Super Duplex Stainless Steel in H2S-Free and H2S-Containing Acidic Environments

Cited by 5 publications

References 58 publications

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

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

Sigma‐Phase Distribution in 2507 Super Duplex Stainless Steel Continuous Casting Slabs

Optimization of plasma arc welding process parameters of SAF 2507/316L dissimilar steel based on response surface method

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