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The University of Southampton
nC2 An Enterprise Consultancy Unit

Erosion Testing

Erosive wear is the results of impact by particles of solid or liquid against the surface of an object. The impacting particles gradually remove material from the surface through repeated deformations and cutting actions.

The effect or extent of erosive wear is often assessed in the laboratory various test rigs, however, the two used by nC2 consulting are the slurry jet impingement erosion test rig and air – sand erosion test rig.

Slurry erosion rig
The slurry jet impingement erosion test method is a process by which a mixture of solid particles and liquid is transported through a pipe network and a nozzle prior to being blasted on the surface of a coupon cut from a component/material.
Slurry erosion rig schematic
Slurry erosion rig schematic
Slurry erosion sample under test
The rig can be used to assess slurry erosion of coatings and bulk materials. Typical test conditions handle by the rig are jet speeds of up to 25 m/s; typical slurry conc. is 2.1% w/w; erodent size between 50 µm – 250 µm. Test angles: are typically 15°, 30°, 45°, 60° and 90°.
Air Sand Erosion Rig
Unlike the slurry jet erosion rig, the air – sand erosion rig uses a mixture of gas and solid particle to generate erosive wear on a surface. Solid particles are introduced into a fast-moving gas-stream and accelerated down an acceleration tube before impact with the test piece.
Air Sand Erosion Rig Schematic
Air Sand Erosion Rig Schematic
Slurry erosion sample under test
The air – sand erosion rig can be used to assess erosive wear of all types of engineering materials and coatings.
Slideshow image
Typical test conditions capable by the rig are particle speeds of up to 240 m/s with erodent size between 50 µm – 250 µm at a feed rate of 10 g/min. Test temperature is ambient and typical test angles are 15°, 30°, 45°, 60° and 90°.

The slurry jet impingement erosion test method is a process by which a mixture of solid particles and liquid is transported through a pipe network and a nozzle prior to being blasted on the surface of a coupon cut from a component/material. The current slurry jet erosion rig used for erosion testing by nC2. The rig can be used to assess slurry erosion of coatings and bulk materials. Typical test conditions handle by the rig are: jet speed up to 25 m/s; typical slurry conc. is 2.1% w/w; erodent size between 50 µm – 250 µm. Test angles:  are typically 15°, 30°, 45°, 60° and 90°.

Unlike the slurry jet erosion rig, the air – sand erosion rig uses a mixture of gas and solid particle to generate erosive wear on a surface. Solid particles are introduced into a fast-moving gas-stream and accelerated down an acceleration tube before impact with the test piece. The air – sand erosion rig can be used to assess erosive wear of all types of engineering materials and coatings. Typical test conditions capable by the rig are: particle speed up to 240 m/s; erodent feed rate of 10 g/min; erodent size between 50 µm – 250 µm. Test temperature is ambient and typical test angles are 15°, 30°, 45°, 60° and 90°.

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