An experimental and numerical investigation of CO2 corrosion in a rapid expansion pipe geometry

Owen, Joshua; Godfrey, J E; Ma, Wenlong; Boer, Gregory de; Al-Khateeb, Mohammed; Thompson, H. M.; Neville, Anne; Ramsey, Callum; Barker, Richard

doi:10.1016/j.corsci.2019.108362

Cited by 21 publications

(15 citation statements)

References 34 publications

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“…The Rp values of each specimen were obtained by measuring the LPR, and the results are shown in Figure 7. Corrosion rates are directly proportional to 1/Rp [10]. The Rp increases along the flow direction to the maximum value on the backflow surface and then reduces on the downstream surface.…”

Section: Eis Analysismentioning

confidence: 99%

“…It is undeniable that most of them are related to the changes in material factors resulting from the thermal effects of the welding process, such as microstructure and element distribution [5][6][7][8]. However, localized corrosion is prone to occur in regions where the flow status changes suddenly, such as in rapid expansion pipes [9,10], gradual contraction pipes [11], pitting defects [12,13], and the orifice [14,15]. It has been proved that the local fluid turbulence due to the sudden change of geometry has significant effects on corrosion [11,12,14].…”

Section: Introductionmentioning

confidence: 99%

“…A new rotating disk with WRH was designed and used to examine the local turbulence effect on corrosion around the WRH combined with computational fluid dynamics (CFD). Different from the method employed in published works (elbow [3,19], rapidly expanding pipe [10], gradual contraction pipe [11]), this test rig concentrated on the corrosion differences on the weld instead of the special pipes. The corrosion behavior on different surfaces of the WRH was investigated by a homemade rotating disk electrode (RDE) with a weldlike bump.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Local Fluid Disturbance Induced by Weld Reinforcement Height on the Corrosion of a Low Alloy Steel Weld

Zheng

Wang

et al. 2023

Metals

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Weld corrosion exists widely in the petrochemical industry and attracts great attention. Most research proves that weld corrosion originates from the material factors introduced during the welding process. However, it is noted that local fluid turbulence due to the weld reinforcement height (WRH) plays an important role in the non-uniform corrosion of welds in flowing media. Accordingly, the individual effect of the local flow on the weld corrosion of low alloy steel was analyzed by experiments and simulation in this study. Electrochemical measurements and morphology observation were conducted, combined with flow field analyses. The results showed that local fluid turbulence due to WRH affected the non-uniform corrosion of low alloy steel welds. The upstream surface and the backflow surface had the highest and lowest corrosion rates, respectively. Interestingly, the high flow velocity surface region did not have a high-corrosion rate. This is due to the combined effects of mass transfer, charge transfer, and wall shear stress. The pitting corrosion was also discussed in view of the aspects above.

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Section: Eis Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Local Fluid Disturbance Induced by Weld Reinforcement Height on the Corrosion of a Low Alloy Steel Weld

Zheng

Wang

et al. 2023

Metals

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“…As an important component of offshore platform systems, seawater pipelines often undertake the functions of fire-fighting, cooling and heat exchange, and are used in the alternating environments of dynamic and static seawater 1 – 3 . The flowing seawater leads to faster diffusion of corrosive medium and accelerates the spalling of corrosion products 4 – 7 .…”

Section: Introductionmentioning

confidence: 99%

Multiscale characterization of seawater pipe erosion of B10 copper–nickel alloy welded joints

Zhang

Liu

et al. 2022

Sci Rep

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In seawater pipeline, the welding joint is a non-uniform structure composed of welding seam, base metal and heat affected zone. It has inhomogeneity in chemical composition, organizational structure, residual stress, etc. As local defects and high turbulence accelerate corrosion, the welding joint is often the weakest link in pipeline corrosion. Herein, the electrochemical corrosion behavior of B10 alloy welded joint in flowing seawater is studied from macroscopic and submicroscopic viewpoints using AC impedance, linear polarization, array electrode and morphological characterization. The results reveal that the corrosion rate of weld metal (WM), base metal (BM) and heat-affected zone (HAZ) decreased with the increase of time. Combined with SEM and EDS analysis, it can be seen that the increase in time led to the decomposition and accumulation of corrosion products, which gradually enhanced the corrosion resistance of welded joints. At the submicroscopic scale, WM acts as a cathode to mitigate corrosion during the later stages of high flow rate.

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“…the electrochemical reactions at the metal-oxide interface, [1][2][3][4][5] the accelerated removal or dissolution of the oxide film by the fluid force, [6][7][8][9][10][11] and the enhanced mass transfer of the reactants and resultants between the steel surface and the bulk solution. [12][13][14][15] Materials degradation induced by FAC is a tough issue for various steel structures such as energy pipelines, ship hulls, nuclear plants, hydro-turbines, propellers and impellers. [16][17][18][19][20] FAC of steels is a multidisciplinary issue which is determined by the interaction of electrochemical reaction, mass transfer and hydrodynamic factors.…”

mentioning

confidence: 99%

The Roles of Fluid Hydrodynamics, Mass Transfer, Rust Layer and Macro-Cell Current on Flow Accelerated Corrosion of Carbon Steel in Oxygen Containing Electrolyte

Liu¹,

Xu²,

Zhu³

et al. 2020

J. Electrochem. Soc.

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The flow accelerated corrosion (FAC) of EH 36 carbon steel in the oxygen containing flowing electrolyte is studied using multi-electrode array arranged in a jet rig system. The FAC of the working electrodes (WEs) under both uncoupled and coupled conditions are investigated in conjunction with computational fluid dynamics (CFD) simulation. Results show that a higher mass transfer rate would lead to a higher FAC rate when the WEs are uncoupled. The rust layer could retard the oxygen diffusion, resulting in the FAC rate decreasing. The mass transfer process and the distribution of the rust layer are significantly influenced by the fluid hydrodynamics. However, when the WEs are coupled together, serious FAC damage would occur on the WEs where lower mass transfer rates are registered. The macro-cell currents would become the main lead of FAC propagation at coupled conditions.

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An experimental and numerical investigation of CO2 corrosion in a rapid expansion pipe geometry

Abstract: This is a repository copy of An experimental and numerical investigation of CO2 corrosion in a rapid expansion pipe geometry.

Cited by 21 publications

References 34 publications

Effect of Local Fluid Disturbance Induced by Weld Reinforcement Height on the Corrosion of a Low Alloy Steel Weld

Effect of Local Fluid Disturbance Induced by Weld Reinforcement Height on the Corrosion of a Low Alloy Steel Weld

Multiscale characterization of seawater pipe erosion of B10 copper–nickel alloy welded joints

The Roles of Fluid Hydrodynamics, Mass Transfer, Rust Layer and Macro-Cell Current on Flow Accelerated Corrosion of Carbon Steel in Oxygen Containing Electrolyte

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