Erosion-Corrosion of 90° Carbonsteel Elbow in Potash Brine-Sand Slurries

Elemuren, Raheem; Evitts, Richard W.; Gerspacher, Regan; Oguocha, I. N. A.; Kennell, Glyn; Odeshi, A.G.

doi:10.7449/2018mst/2018/mst_2018_1381_1388

Cited by 2 publications

(5 citation statements)

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“…Consequently, the outer wall of the elbow inferred maximum particle wall impaction due to entrained particles that were mostly concentrated near the outlet. The erosion-corrosion damage increase with the escalation in slurry transport velocity with maximum particle impaction adjacent to the outlet, which is consistent with the observations found in the literature [2,14,15].…”

Section: Mass Losssupporting

confidence: 91%

“…Based on the path followed by a sand particle in Figure 15, some conclusions were drawn: the zone of peak erosion generated downstream was the result of a re-directed particle path towards the elbow exit section. Cumulative mechanisms of sliding wear and the redirected particle at the bottom half (BH) section caused the maximum erosion downstream near the outlet of the elbow, consistent with findings reported by other authors [2,26]. The maximum erosion rate of 90-degree elbow was 2.35 × 10 −8 kg/s-m 2 located in the bottom section for 2 m/s flow velocity.…”

Section: Influence Of the Slurry Speed On The Erosion Profile And Erosion Ratesupporting

confidence: 89%

“…In order to alleviate the erosion of pipelines, the massive cost is directed annually. If erosion induced damage is not detected, it might lead to malfunction of equipment, flow changing devices and affects the operating safety of the whole process [2]. Erosion-corrosion is the cumulative degradation due to corrosion and erosion and is caused by one or more than two-phase flow under high transportation velocities in pipelines.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Sand Fines Transport Velocity on Erosion-Corrosion Phenomena of Carbon Steel 90-Degree Elbow

Khan

Pao

et al. 2020

Metals

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Erosion-corrosion is an ineluctable flow assurance problem confronted in hydrocarbon transportation and production systems. In this work, the effect of sand fines velocity on the erosion-corrosion behavior of AISI 1018 carbon steel long radius 90° elbows was experimentally and numerically investigated for liquid-solid flow conditions. Experiments were effectuated for sand fines of mean diameter 50 µm circulated in a flow loop with three different velocities (0.5, 1 and 2 m/s). To elucidate the erosion-corrosion mechanism and degradation rate, the material loss analysis, multilayer paint modeling (MPM) and microscopic imaging technique were employed, with computational fluid dynamics (CFD) and discrete phase modeling (DPM) also capacitating to evaluate the erosion distribution. It was perceived that increasing slurry velocity significantly changes the particle-wall impaction mechanism, leading to an increase in material degradation in the elbow bottom section up to 2 times in comparison to the low transport velocity. The erosion scars and pits development at the elbows internal surface was found to govern the wear mechanism in the carbon steel and made downstream section susceptible to erosion and corrosion. The material removal mechanisms were ascertained to change from cutting to pitting and plastic deformation with an increase of sand fines transportation velocity from 0.5 m/s to 2 m/s.

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Section: Mass Losssupporting

confidence: 91%

Section: Influence Of the Slurry Speed On The Erosion Profile And Erosion Ratesupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Influence of Sand Fines Transport Velocity on Erosion-Corrosion Phenomena of Carbon Steel 90-Degree Elbow

Khan

Pao

et al. 2020

Metals

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“…Erosion-corrosion resistance of ductile materials is governed by impact conditions, material properties, erodent characteristics, and flow conditions [3][4][5][6][7][8]. Many studies [1,[9][10][11][12][13][14][15] are reported in the literature which highlight the erosion-corrosion phenomena of different types of carbon steel (CS) and austenitic stainless steel (SS). Both 304L SS and 1018 CS have excellent mechanical properties and high thermal persistence, which determine their ubiquitous applications in hydrocarbon and mineral processing pipeline systems.…”

Section: Introductionmentioning

confidence: 99%

“…However, the long radius curvature geometry of 90 • elbow results in severe particle impaction, rebound, and mass transfer at different locations around the elbow configurations [16,17]. The erosion wear and the cumulative erosion-corrosion mechanism of the 90 • elbows have been experimentally evaluated by some authors to acquire meaningful data on the erosion-corrosion in elbow configurations for field working conditions [4,9,20]. In most studies, the mass loss of the whole elbow geometry is measured after the experiment to quantify the erosion-corrosion rate.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Erosion-Corrosion Performance of AISI 1018 Carbon Steel and AISI 304L Stainless Steel 90-Degree Elbow Pipe

Khan

Pao

2019

Metals

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Erosion-corrosion is an unavoidable material degradation process in flow pipelines transporting abrasive particles with carrier fluids. In this study, the multiphase flow loop apparatus is employed to assess the erosion-corrosion behavior and mechanism relative to AISI 1018 carbon steel (CS) and AISI 304L stainless steel (SS) 90° long radius elbows with the inner diameter of 50.8 mm. Fine silica sand of 50 µm average size was used as a dispersed phase and erosion-corrosion tests were conducted for slug flow conditions. The erosion-corrosion analysis of 90° elbows was determined from its surface morphologies before and after the experiment using confocal and scanning electron microscopy (SEM). The direct mass loss was measured to quantify the erosion-corrosion rate of the elbow configurations. Additionally, multilayer paint modeling experiments were performed to relate qualitative inferences on erosion distribution and location with the erosion-corrosion mechanism. It was observed that the erosion or corrosion pitting mechanism prevailed on the 1018 CS elbow surface, and the 304L SS displayed excellent erosion-corrosion resistance properties. Moreover, the erosion-corrosion rate was found to be 4.12 times more in the 1018 CS compared to the 304L SS with the maximum particle impaction identified at the exit of the horizontal-horizontal (H-H) 90° elbow for slug flow.

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Erosion-Corrosion of 90° Carbonsteel Elbow in Potash Brine-Sand Slurries

Cited by 2 publications

References 0 publications

Influence of Sand Fines Transport Velocity on Erosion-Corrosion Phenomena of Carbon Steel 90-Degree Elbow

Influence of Sand Fines Transport Velocity on Erosion-Corrosion Phenomena of Carbon Steel 90-Degree Elbow

An Experimental Study on the Erosion-Corrosion Performance of AISI 1018 Carbon Steel and AISI 304L Stainless Steel 90-Degree Elbow Pipe

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