Scouring erosion resistance of metallic materials used in slurry pump service

Llewellyn, R.; Yick, Sing; Dolman, Kevin

doi:10.1016/j.wear.2003.10.002

Cited by 181 publications

(95 citation statements)

References 4 publications

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“…Eutectic/peritectic carbides with less carbide spacing in the Mo10 iron effectively protected the matrices resulting in the best erosion-corrosion resistance. This agrees with the suggestions by Kim et al [7] that eutectic carbides can effectively improve abrasion wear resistance and by Llewellyn et al [11] that the higher Cr:C ratio can be beneficial in applications with corrosion. …”

Section: Erosion-corrosion Testsupporting

confidence: 92%

“…Walker [10] reported wear rates of slurry pump side-liners made from Fe-27Cr-2.8C and hypereutectic Fe-30Cr against of those made from natural rubber and grey cast iron using silicious ores as abrasive. Llewellyn et al [11] reported a wear ranking from the Coriolis erosion test data of several hypoeutectic and hypereutectic high chromium cast irons (up to 44% carbide volume fraction) against a standard AISI1020 steel using a slurry of silica sand (212-300 µm) as erosive medium. In this work chill cast, hypereutectic Fe-35Cr-5C iron with very fine primary carbides showed exceptionally high Coriolis erosion resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Gates et al [16] studied synergistic corrosion-abrasion of cast wear-resistant materials in nitric acid and suggested that the Fe-15Cr-1.4C iron with an austenite matrix was the most resistant to synergistic corrosion-abrasion. Llewellyn et al [11] noted that the higher Cr:C ratio in high chromium cast irons can be beneficial in certain applications where corrosion contributes significantly to overall attack.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry

Imurai¹,

Thanachayanont²,

Pearce³

et al. 2015

Archives of Metallurgy and Materials

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MIKROSTRUKTURA ODLEWANYCH WYSOKOCHROMOWYCH ŻELIW BIAŁYCH ZAWIERAJĄCYCH MOLIBDEN I ICH WŁAŚCIWOŚCI EROZYJNO-KOROZYJNE W WODNEJ ZAWIESINIE KWASU SIARKOWEGOMicrostructure and erosion-corrosion behaviour of as-cast high chromium white irons containing molybdenum in aqueous sulfuric-acid slurry was studied. The experimental irons contained 28 wt.%Cr with a Cr:C ratio of about 10 and up to 10 wt.%Mo. The irons with up to 6 wt.%Mo are hypoeutectic, whereas the iron with 10 wt.%Mo becomes eutectic/peritectic. Mo addition promotes formation of M 23 C 6 and M 6 C, instead of typical M 7 C 3 . Erosion-corrosion testing was performed in aqueous sulfuric-acid slurry containing alumina particles. The hypoeutectic Fe-28Cr-2.7C-1Mo with mainly M 7 C 3 and the eutectic/peritectic Fe-28Cr-2.6C-10Mo showed reduced wear rates of about 30% and 7% of that of the reference iron without Mo addition, respectively. The reduction of the carbide-matrix hardness difference, the increase of corrosion resistance of the matrices, and the increase of macro-hardness are determining factors for the improvement of erosion-corrosion resistance of the irons.Keywords: high chromium cast irons, microstructure, electron microscopy, erosion, corrosion W pracy badano mikrostrukturę odlewanych wysokochromowych żeliw białych zawierających molibden oraz ich właściwo-ści erozyjno-korozyjne w wodnej zawiesinie kwasu siarkowego. Badane żeliwa zawierały 28% wag. chromu przy stosunku Cr:C około 10 oraz do 10% wag. molibdenu. żeliwa zawierające do 6% wag. Mo są podeutektykami, natomiast żeliwa o zawartości 10% wag. Mo -eutektykami/perytektykami. Dodatek molibdenu sprzyja powstawaniu faz M 23 C 6 i M 6 C, w miejsce typowego M 7 C 3 . Właściwości erozyjno-korozyjne badano w wodnej zawiesinie kwasu siarkowego zawierającej cząstki tlenku glinu. Szybkość zużycia podeutektycznego żeliwa Fe-28Cr-2,7C-1Mo, zawierającego głównie M 7 C 3 , oraz eutektyczny/perytektyczny Fe-28Cr-2,6C-10Mo była niższa odpowiednio o ok. 30% i 7% w odniesieniu do żeliwa bez dodatku Mo. Jako czynniki determinujące zwiększenie odporności na erozję i korozję należy wymienić: zmniejszenie różnicy twardości pomiędzy węglikiem a matrycą, wzrost odporności na korozję matrycy oraz wzrost makrotwardości.

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Section: Erosion-corrosion Testsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry

Imurai¹,

Thanachayanont²,

Pearce³

et al. 2015

Archives of Metallurgy and Materials

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“…There are many studies on wear and abrasion of internal surface of pump, [3][4][5][6][7][8][9][10][11] but only few focus on the motion of particles in centrifugal dredge pumps. Wilson et al 1 discussed the effect of solid concentration on deposit velocity and fully stratification of coarseparticle transport.…”

Section: Introductionmentioning

confidence: 99%

Trajectories of coarse granular sediment particles in a simplified centrifugal dredge pump model

Zhang²,

2016

Advances in Mechanical Engineering

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Due to different inertia, sediment particles stop following the trails of water elements during the flow passage of a centrifugal pump. In a dredge pump, deviation characteristics of sediment particles from surrounding fluid are still not crystal clear. Apparently, the deviation makes sediment particles attacking the inner wall and causes wear and tear. In addition, the deviation would also decrease the pump efficiency. In order to understand the motion of the sediment particles and their deviation characteristics inside a dredge pump, authors built a Lagrangian numerical model based on particle's kinematic balance equations, and then verified it through a rotating platform. The influential factors of the sediment particle motion, such as the rotation speed, as well as the diameter and density of sediment particles, were investigated. Finally, a conclusion is obtained that says if blade profiles are close to the relative trajectory of a particle, this particle will cause minimized wear to the blade wall.

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“…slurry pumps, where abrasion and/or erosion in aqueous environments occur [21,22]. Most studies found in the literature have concentrated either on the corrosion behaviour of high-Cr WCIs [23][24][25] or on their wear characteristics in air and in slurries [21,[26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Three-Body Abrasion Corrosion Studies of High-Cr Cast Irons: Benefits and Limitations of Tribo-electrochemical Methods

Salasi

Stachowiak

2015

J Bio Tribo Corros

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High-Cr white cast irons (WCIs) are multiphase alloys commonly used in aqueous industrial environments in applications that require both high abrasion and high corrosion resistance. Various electrochemical techniques can be useful in elucidating tribocorrosion characteristics of metallic materials undergoing wear in a corrosive environment. This study is focused on the interpretation of electrochemical measurements applied to three-body abrasion corrosion contacts of high-Cr WCIs. Particular attention has been paid to determine whether tribo-electrochemical data can pick up any effects that the multiphase microstructure of WCIs may have on the tribocorrosion characteristics, especially in environments containing chloride ions. Since both wear and corrosion of multiphase alloys are usually not uniform, their tribocorrosion behaviour is difficult to study and is still poorly understood. The experimental results are discussed in terms of benefits and limitations of tribo-electrochemical techniques such as polarization (potentiostatic, potentiodynamic) and electrochemical noise (galvanic coupling, potentiostatic) in studying abrasion corrosion behaviour of high-Cr WCIs. The application of high-resolution surface analysis techniques (microprobe, NanoSIMS, C-AFM and SKPFM), used in support of the electrochemical data interpretation, is also demonstrated.

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Scouring erosion resistance of metallic materials used in slurry pump service

Cited by 181 publications

References 4 publications

Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry

Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry

Trajectories of coarse granular sediment particles in a simplified centrifugal dredge pump model

Three-Body Abrasion Corrosion Studies of High-Cr Cast Irons: Benefits and Limitations of Tribo-electrochemical Methods

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