Experimental and numerical investigation of flow- accelerated corrosion in 90° elbow

Si, Xiaodong; Zhou, Keping; Zhang, Rui; Lin, Tong; Xu, Qi

doi:10.1088/2053-1591/aacc34

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…As the higher pressure appears at the outer bend and the lower pressure is present at the inner bend, the fluid on the outer side would flow to the inner side under the pressure difference, resulting in a vortex. [45] The position of the vortex gradually moves from the outside of the elbow to the inside along the flow direction.…”

Section: Establishment Of the Fac Modelmentioning

confidence: 99%

Investigation of corrosion behavior at elbow by array electrode and computational fluid dynamics simulation

et al. 2020

Materials & Corrosion

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The present study focuses on the flow-accelerated corrosion (FAC) behavior of A106Gr.B steel at 90°elbow by electrochemical measurement and computational fluid dynamics (CFD) simulation. The FAC rates under turbulent flows with a velocity of 3 and 1.5 m/s were measured by an array electrode technique in a loop system. The experimental results reveal that the maximum FAC rate appears at the extrados of 90°elbow, consistent with the locations from the rupture of the carbon steel piping in the worst cases at elbows. In addition, an effective mass transfer coefficient in consideration of the geometric factor was used to evaluate the FAC rate at intrados and extrados of the 90°elbow by CFD simulation. The predicted results are in good agreement with the experimental values.

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Section: Establishment Of the Fac Modelmentioning

confidence: 99%

Investigation of corrosion behavior at elbow by array electrode and computational fluid dynamics simulation

et al. 2020

Materials & Corrosion

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“…Our previous study explored the distribution characteristics of flow-accelerated corrosion in carbon steel bent pipes at room temperature [26][27][28]. The results revealed that the outermost side of elbow exhibits the highest rate of FAC, and its mechanism was explained based on the corrosion-electrode model.…”

Section: Introductionmentioning

confidence: 99%

Effects of fluid dynamics parameters on flow-accelerated corrosion at elbow of carbon steel pipeline

Xu,

Zhang,

2024

Mater. Res. Express

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Flow-accelerated corrosion (FAC) has always posed a significant threat to the safe operation of the secondary circuit in nuclear power units. In this study, we investigated typical carbon steel elbow pipe sections susceptible to FAC failure using fluid dynamics software to analyze the hydrodynamic characteristics at varying inlet velocities (2m/s, 4m/s, and 6m/s). The distribution of the FAC rate was monitored in real time using an array electrode. The results revealed that the outermost side of the elbow pipe section was the most susceptible location to FAC. By comparing different fluid dynamic parameters with the FAC rate, we identified radial velocity as an effective parameter for characterizing the FAC rate. Additionally, we established an empirical formula for predicting flow-accelerated corrosion in elbow pipe sections using the least squares method. The implications of this research are pertinent to the design and operation of pipelines in nuclear power plants.

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Empirical model of flow-accelerated corrosion at elbow of carbon steel pipeline based on dimensional analysis

Bao,

Qin,

Pan

et al. 2024

Annals of Nuclear Energy

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Experimental and numerical investigation of flow- accelerated corrosion in 90° elbow

Cited by 4 publications

References 26 publications

Investigation of corrosion behavior at elbow by array electrode and computational fluid dynamics simulation

Investigation of corrosion behavior at elbow by array electrode and computational fluid dynamics simulation

Effects of fluid dynamics parameters on flow-accelerated corrosion at elbow of carbon steel pipeline

Empirical model of flow-accelerated corrosion at elbow of carbon steel pipeline based on dimensional analysis

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