Particle concentration and size effects on the erosion-corrosion of pure metals in aqueous slurries

Telfer, C.G.; Stack, Margaret; Jana, B.D.

doi:10.1016/j.triboint.2012.04.010

Cited by 50 publications

(22 citation statements)

References 14 publications

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“…The hardness of the particles can increase the severity of the tests, and high hardness values have been reported for some foods such as nuts [9,10]. Previous works examined the effects of particle size and concentration [11][12][13]. For these tests, a concentration of 30 gl -1 of particles with the average size of 9 lm was used to maintain the consistency with the previous studies [3,6,14].…”

Section: Test Slurrymentioning

confidence: 95%

Micro-abrasion-corrosion Maps of 316L Stainless Steel in Artificial Saliva

2015

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The role of salivary media is essential during mastication and ingestion processes; yet it can hinder the performance of foreign materials in the oral cavity. The aim of this study was to examine the effects of applied load and applied electrical potential on the tribo-corrosion mechanisms of 316L stainless steel in an environment similar to oral cavity conditions. 316L stainless steel is a material commonly used in dentistry for orthodontic braces, wires and in some cases as dental crowns. This is due to its favourable corrosion resistance. Relatively few studies have examined the materials performance in an oral environment. The results of this work were used to generate polarisation curves and wastage and mechanism maps to describe the material's tribo-corrosion behaviour. A significant difference in corrosion current densities was observed in the presence of abrasive particles suggesting the removal of the protective chromium oxide passive film. It was found that the corrosion resistant nature of 316L stainless steel resulted in a wear mechanism which was micro-abrasion dominated for all test conditions. Keywords 316L stainless steel Á Artificial saliva Á Oral cavity Á Abrasion Á Corrosion Á Tribo-corrosion mechanisms V Volume loss (m 3) v Volume fraction W Applied load (N)

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Section: Test Slurrymentioning

confidence: 95%

Micro-abrasion-corrosion Maps of 316L Stainless Steel in Artificial Saliva

2015

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“…Approaches that involve mapping of the inter-relationship between erosion corrosion damage and environmental parameters, have also been utilised [7,8]. Another desirable approach involves mathematical modelling of corrosive wear which often makes use of CFD packages to predict flow regimes [9] [10].…”

Section: Introductionmentioning

confidence: 99%

Enhanced approach of assessing the corrosive wear of engineering materials under impingement

Giourntas

Hodgkiess²,

Galloway

2015

Wear

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Corrosive wear phenomena are apparent in hydraulic machinery that handle slurries. This study focuses on the development of an integrated methodology of material assessment that is employed to underst under impinging slurry. The technique involves mass loss measurements and post-test analysis of the surface, which comprises measurement of wear scar depths and volumes, that yield the quantification of the various material degradation processes that occur directly under, and adjacent to, the impinging jet. A medium carbon steel and a stainless steel have been investigated, since they exhibit different corrosive wear behaviour.

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“…Parameters. Because numerous factors affect the erosion effect, e.g., the abrasive diameter, abrasive shape, and abrasive hardness [28][29][30][31], the experimental parameters of the abrasive and gas jet should be determined along with the engineering characteristics and technological status of erosive gas jet-assisted drilling. At present, widely used abrasives include quartz sand, garnet, brown corundum, and silicon carbide.…”

Section: Methodsmentioning

confidence: 99%

Wear Mechanism of Abrasive Gas Jet Erosion on a Rock and the Effect of Abrasive Hardness on It

et al. 2019

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The existing erosion models of abrasive gas jet tend to neglect the effects of the rebounding abrasive. To address this shortcoming, abrasive wear tests were conducted on limestone by using an abrasive gas jet containing different types of particles and with different standoff distances. The results indicate that erosion pits have the shape of an inverted cone and a hemispherical bottom. An annular platform above the hemispherical bottom connects the bottom with the side of the pit. The primary cause of the peculiar pit shape is the flow field geometry of the gas jet with its entrained particles. There is an annular region between the axis and boundary of the abrasive gas jet, and it contains no abrasive. Particles swirling around the axis form a hemispherical bottom. After rebounding, the abrasive with the highest velocity enlarges the diameters of both the hemispherical bottom and erosion pit and induces the formation of an annular platform. The surface features of different areas of the erosion pit are characterized using a scanning electron microscope (SEM). It can be concluded that the failure modes for different locations are different. The failure is caused by an impact stress wave of the incident abrasive at the bottom. Plastic deformation is the primary failure mode induced by rebounding particles at the sides of the hemispherical bottom. The plastic deformation induced by the incident abrasive and fatigue failure induced by the rebounding abrasive are the primary failure modes on the annular platform. Fatigue failure induced by rebounding particles is the primary mode at the sides of the erosion pits. The rock failure mechanism that occurs for particles with different hardness is the same, but the rock damaged by the hard abrasive has a rougher surface.

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Particle concentration and size effects on the erosion-corrosion of pure metals in aqueous slurries

Cited by 50 publications

References 14 publications

Micro-abrasion-corrosion Maps of 316L Stainless Steel in Artificial Saliva

Micro-abrasion-corrosion Maps of 316L Stainless Steel in Artificial Saliva

Enhanced approach of assessing the corrosive wear of engineering materials under impingement

Wear Mechanism of Abrasive Gas Jet Erosion on a Rock and the Effect of Abrasive Hardness on It

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