Flow-Assisted Corrosion of API 5L X56 Steel: Effect of Flow Velocity and Dissolved Oxygen

Meena, L K and Madan, M and Chaudhari, G P and Singh, Raghuvir (2024) Flow-Assisted Corrosion of API 5L X56 Steel: Effect of Flow Velocity and Dissolved Oxygen. Transactions of The Indian Institute of Metals .

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Flow-accelerated corrosion (FAC) is a complex mechanism of material degradation and depends upon the fluid hydrodynamic parameters, material microstructure and compositions, and environmental chemistry. The effect of flow velocity and dissolved oxygen on FAC behavior of API 5L X56 steels in 0.3 M NaCl solution is investigated. Electrochemical and weight loss measurements were taken in a closed-loop corrosion evaluation system at flow velocities of similar to 0.25, 1.0, 1.6, and 2.3 m/s and dissolved oxygen (DO) contents of similar to 50, 500, 1500, 2500, and 4500 ppb. The corrosion rate observed to increase with flow velocity and dissolved oxygen content. The post-corrosion topography and corrosion products were investigated using 3D profilometry, scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS), and Raman spectroscopy techniques. The corrosion products mainly contained hematite (alpha-Fe2O3), lepidocrocite (gamma-FeOOH), goethite (alpha-FeOOH), and magnetite ( Fe3O4). The wall shear stress (tau) induced on specimen surface was simulated through CFD approaches and correlated with corrosion resistance of the steel at different flow velocities.

Item Type:Article
Official URL/DOI:https://10.1007/s12666-023-03229-0
Uncontrolled Keywords:Corrosion, flow-assisted corrosion, API 5L steel, flow velocity, CO2 Corrosion, dissolved oxygen, CFD, mild-steel, behavior, pipeline, accelerated corrosion, carbon-steel
Divisions:Material Science and Technology
ID Code:9499
Deposited By:HOD KRIT
Deposited On:27 Feb 2024 15:25
Last Modified:27 Feb 2024 15:25
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