CO2 corrosion of X80 steel welded joints under micro-turbulence induced by welding reinforcement height

Dou, Xiao-hui; Li, Bin; He, Zong-hao; Zhang, Xin-wei; Zhang, Da-lei; Li, Yan

doi:10.1007/s42243-023-01091-4

J. Iron Steel Res. Int.

2023

DOI: 10.1007/s42243-023-01091-4

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CO2 corrosion of X80 steel welded joints under micro-turbulence induced by welding reinforcement height

Xiao-hui Dou,

Bin Li,

Zong-hao He

et al.

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2024

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Cited by 3 publications

References 43 publications

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Crevice corrosion of reinforcing steel in carbonated simulated concrete pore solutions contaminated by chloride

Wu,

Gong,

Zhang

et al. 2024

J. Iron Steel Res. Int.

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Crevice corrosion of reinforcing steel in carbonated simulated concrete pore solutions contaminated by chloride

Wu,

Gong,

Zhang

et al. 2024

J. Iron Steel Res. Int.

View full text Add to dashboard Cite

Corrosion of welding reinforcement height under dynamic conditions

Dou,

Li,

Xiang

et al. 2024

Physics of Fluids

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The presence of welding reinforcement height (WRH) within oil and gas pipelines can lead to micro-turbulence in localized areas during transportation, resulting in corrosion failure. This study employed a modular reconstruction method to simulate and reconstruct X80 steel welded joints, and investigated the erosion-corrosion behavior at the WRH using wire beam microelectrode, electrochemical impedance spectroscopy, and computational fluid dynamics simulations. The results show that the galvanic current density (GCD) in the weld metal exhibits cathodic behavior, while the GCD in the base metal and heat-affected zone shows anodic behavior. The top of WRH is susceptible to corrosion failure. As the radius of WRH increases, the corrosion rate also increases. Additionally, the corrosion rate increases similarly with an increase in flow velocity. The galvanic corrosion intensity factor (g) is 0.24, and the local corrosion is moderate. This work has scientific significance in ensuring the long-term safe operation of pipelines and reducing the risk of corrosion failure.

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The corrosion analysis of X80 pipeline steel welded joint using wire beam electrode and numerical simulation methods

Dou,

Li,

Zhang

et al. 2024

ACMM

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Purpose The purpose of this study is to characterize the galvanic corrosion behavior of a simulated X80 pipeline steel welded joint (PSWJ) reconstructed by the wire beam electrode (WBE) and numerical simulation methods. Design/methodology/approach The galvanic corrosion of an X80 PSWJ was studied using WBE and numerical simulation methods. The microstructures of the coarse-grained heat affected zone, fine-grained heat affected zone and intercritical heat affected zone were simulated in X80 pipeline steel via Gleeble thermomechanical simulation processing. Findings Comparing the corrosion current density of coupled and isolated weld metal (WM), base metal (BM) and heat-affected zone (HAZ), the coupled WM exhibited a higher corrosion current density than isolated WM; the coupled BM and HAZ exhibited lower corrosion current densities than isolated BM and HAZ. The results exhibited that the maximum anodic galvanic current fitted the Gumbel distribution. Moreover, the numerical simulation results agreed well with the experimental data. Originality/value This study provides insight into corrosion evaluation of heterogeneous welded joints by a combination of experiment and simulation. The method of reconstruction of the welded joint has been proven to be a feasible approach for studying the corrosion behavior of the X80 PSWJ with high spatial resolution.

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CO2 corrosion of X80 steel welded joints under micro-turbulence induced by welding reinforcement height

Cited by 3 publications

References 43 publications

Crevice corrosion of reinforcing steel in carbonated simulated concrete pore solutions contaminated by chloride

Crevice corrosion of reinforcing steel in carbonated simulated concrete pore solutions contaminated by chloride

Corrosion of welding reinforcement height under dynamic conditions

The corrosion analysis of X80 pipeline steel welded joint using wire beam electrode and numerical simulation methods

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