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Erosion slurry

A slurry by definition is a physical mixture of solid particles and a liquid (usually water) of such a consistency that it can be pumped. The particles must be in suspension in the liquid, and most pumpable slurries contain at least 10% solids. [Pg.69]

Apparent Abrasivity. Typical pumpable slurries possess inherent apparent abrasivity, which must be determined by testing to enable cost predictions for pump replacement parts or other equipment used for slurries. Apparent abrasivity, without inhibition, is the complex synergistic reaction of many factors (Fig. 14). This reaction, known as the Morrison-Miller effect (Ref 6), is such that the wear response of a given material in [Pg.69]

Other modes of wear are also encountered when handling slurries. As shown in Fig. 15, these include abrasion-corrosion (the most severe wear mode), scouring wear, abrasive metal-to-metal wear (crushing and grinding), high-velocity erosion, low-velocity erosion, saltation wear (rapid wear caused when particles are moved forward in a series of short intermittent bounces from a bottom surface), and cavitation. [Pg.70]

1 5 Slurry erosion wear modes, (a) Abrasion-corrosion, (b) Scouring wear, with wear areas equal (left) and unequal (center and right), (c) Crushing and grinding, (d) High-velocity erosion, (e) Low-velocity erosion, (f) Saltation erosion, (g) Cavitation [Pg.71]

Prevention of slurry erosion is accomplished through design changes, for example, lessening the severity of pipe bends or using replaceable [Pg.71]


Four distinct forms of erosive wear have been identified soHd-particle erosion, Hquid-droplet erosion, cavitation erosion, and slurry erosion. [Pg.374]

The abrasion resistance of cobalt-base alloys generally depends on the hardness of the carbide phases and/or the metal matrix. For the complex mechanisms of soHd-particle and slurry erosion, however, generalizations cannot be made, although for the soHd-particle erosion, ductihty may be a factor. For hquid-droplet or cavitation erosion the performance of a material is largely dependent on abiUty to absorb the shock (stress) waves without microscopic fracture occurring. In cobalt-base wear alloys, it has been found that carbide volume fraction, hence, bulk hardness, has Httie effect on resistance to Hquid-droplet and cavitation erosion (32). Much more important are the properties of the matrix. [Pg.374]

Shetty, D.K. et al. (1982), Coal slurry erosion of reaction-bonded SiC , Wear, 79, 275-9. [Pg.558]

Sasaki, K. and BursteinK.T., The generation of surface roughness during slurry erosion- corrosion and its effect on the pitting potential, corrosion science, 38, pp 2111-2120 1996. [Pg.171]

In abrasive wear by hard particles we often find either two-body abrasive wear or three-body abrasive wear, as shown in Figure 5.3. Two-body wear is caused by hard protuberances on the counterface, while in three-body wear hard particles are free to roll and slide between two sliding surfaces. Wear rates due to three-body abrasion are generally lower than those due to two-body abrasion. Various mechanisms of material removal in these two cases differ only in relative importance. Slurry erosion belongs to the abrasive wear category. Erosion is caused by hard particles sticking to the surface entrained in a flowing liquid. [Pg.103]

SLURRY EROSION - Material removal due to the combined action of corrosion and wear. [Pg.135]

From Sasaki, K. and Burstein, G.T. (2000) Observation of a threshold impact energy required to cause passive film rupture during slurry erosion of stainless steel. Philosophical Magazine Letters, 80(7), 489-493. [Pg.294]

Plastics are frequently used for applications requiring erosion resistance, but there does not seem to be much activity or interest in the tribology community of the 1990s. However, there are a number of tests that are applied and have been used to rate erosion resistance of plastics. Erosion, by definition, is progressive loss of material fiom a solid surface due to mechanical interaction between that surfitce and a fluid, a multicomponent fluid, or impinging liquid or solid particles (3). The field of erosion is usually separated into a number of forms of erosion liquid erosion, either continuous stream or droplet, solid particle erosion, slurry erosion, and cavitation erosion. Each have separate laboratory tests. [Pg.397]

Figure 12. Schematic of the ASTM G 75 slurry erosion tester to measure Miller Number. Figure 12. Schematic of the ASTM G 75 slurry erosion tester to measure Miller Number.
Figure 13. Slurry erosion resistance of ultrahigh molecular weight polyethylene (UHMWPE) compared with various metals (two weight percent silica sand in tap water, 16 m/s, 16C)... Figure 13. Slurry erosion resistance of ultrahigh molecular weight polyethylene (UHMWPE) compared with various metals (two weight percent silica sand in tap water, 16 m/s, 16C)...
Madsen, B. W., Blickensderfer, R, "A New Flow-Through Slurry Erosion Wear Test," Slurry Erosion Uses, Applications and Test Methods. ASTM STP 946, J. E Miller and F.E. Schmidt Jr, Eds., ASTM, West Conshohocken, PA, 1987, pp 169-84. [Pg.404]

Make the eroding surface resistant to corrosion. Examples include the use of cobalt-base hardfacing alloys to resist liquid erosion, cavitation, and slurry erosion aluminum bronze hardfacing alloys to prevent cavitation damage on marine propellers or to repair props that have... [Pg.7]

Solid particle erosion can occur in a gaseous or liquid medium containing solid particles. In both cases, particles can be accelerated or decelerated, and their directions of motion can be changed by the fluid. This is more significant in liquid media, and slurry erosion is generally treated as... [Pg.62]

General Description. Slurry erosion is progressive loss of material from a solid surface by the action of a mixture of solid particles in a liquid (slurry) in motion with respect to the solid surface. If the solid surface is capable of corroding in the fluid portion of the slurry, the slurry erosion will contain a corrosion component. Figure 13 shows an example of slurry erosion. [Pg.69]

Hawthorne HM. Some Coriolis slurry erosion test developments. Tribol Int 2002 35(10) 625-30. [Pg.44]

Cavitation also may be an important factor in the high-velocity attack. Attack on pump impellers has been found to be more severe in experiments in which gas bubbles were believed to have been entrained in the slurry. Erosion patterns similar to those observed by Shalnev [123] have been found on pin-specimen-holder channel walls, with most severe points of attac-k a few pin diameters downstream from a pin. Although this agrees with Shalncv s observations, it is not clear whether the effect is due to cavitation or simply high eddy density at this point. [Pg.260]


See other pages where Erosion slurry is mentioned: [Pg.321]    [Pg.259]    [Pg.321]    [Pg.321]    [Pg.399]    [Pg.8]    [Pg.69]    [Pg.70]    [Pg.38]    [Pg.38]    [Pg.117]   
See also in sourсe #XX -- [ Pg.399 , Pg.400 ]

See also in sourсe #XX -- [ Pg.7 , Pg.8 , Pg.71 ]




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