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Dr Jelili Bello (JB)


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Particulate Erosion Testing

We have the facilities and the erosive wear expertise to offer particulate erosion testing which will reveal the best erosive resistant material or coating for your environment.

Talk to us about erosion testing

What is erosive wear?

Erosive wear is caused by the impact of solid particles or liquid against the surface of an object. This gradually removes material from the surface. nC² has the facilities to simulate both ordinary types of erosive wear: through sand in water or in air.

Slurry Erosion Test

In our water-sand (slurry jet) erosion test method, we mix sand with water before firing it through a nozzle onto the surface of a material. The specimens are subjected to the conditions for a set time and the wear rate is determined by weight loss, 2D contact or 3D non contact profilometry, and microscopy. The results can be used to rank materials or coatings for the resistance to erosion with the conditions tailored to suit your specific requirements.

JB testing on the slurry erosion rig

The Erosion Chamber

Typical test conditions

  • Slurry type: Either with normal water or 3.5% NaCl
  • Slurry flow rate: 2.5 ± 0.1 m3/hr
  • Jet velocity: 25 ± 1 m/s
  • Slurry concentration: ~2.1% w/w
  • Nozzle size: 6 mm
  • Test duration (water-sand): 120 mins
  • Sand size: 181 – 251 μm typical
  • Test angles: 15°, 30°, 45°, 60° and 90°
  • Specimen size 50 x 50 x 5 mm

Air Sand Erosion Test

The air-sand erosion test method, which conforms to ASTM-G76, involves adding dry sand to a fast-moving dry air stream and accelerating it down a tube onto a test piece. Typical test conditions are described below and can be tailored to suit your requirements.

Typical test conditions

  • Jet/Particle speed: up to 240 ± 20 m/s
  • Particle feed rate: 10 ± 0.5 g/min
  • Sand feed-rate: 10 g/min
  • Test duration: variable but typically 30 min
  • Particle size: 69 – 251 μm (181 – 251 μm typical)
  • Test temperature: ambient and sub-zero
  • Test angles: 15°, 30°, 45°, 60° and 90°
  • Specimen size 50 x 50 x 5 mm

JB carrying out a sand Erosion test

  • Erosion testing will reveal the best resistant material or coating for your specific environment

Post test analysis

All our tests are repeated three to five times for consistency, and all the samples are weighed before and after exposure to calculate mass loss. If we know material density, we can determine volume loss. We can also use 2D and 3D profilometry equipment to measure volume loss directly.

3D image of wear scar

  • Slurry Erosion Chamber

    Our new slurry erosion test chamber offers a higher capacity for improved testing by allowing a high volume of slurry to be used.

  • Slurry Erosion Pump

    Approximately 200 l of slurry is pumped around the system at speeds of up to 50 m/s.

  • Sample holder

    50 mm x 50 mm samples are placed in the holder at an angle of between 15 and 90 degrees in the slurry flow.

  • Slurry collector

    The slurry is recirculated through a bespoke design of the chamber for test periods of up to 2 hours.

  • Example sample

    Image of erosion damage caused on a sample in two hours of slurry erosion test.

Recent Case Studies