Erosion Resistance Test

Posted by Hardide 30 July, 2025

Independent erosion resistance tests have demonstrated the superior erosion resistance of Hardide coatings over other hard materials.

Hardide-T Sand in Water Slurry Erosion Resistance Test

Southampton University RIfI Erosion test

Erosion test conditions (by Southampton University RIfI)
Erodent: angular sand 300 μm average grain size in water, slurry concentration of ~2.1% w/w.
Jet velocity: 24 m/s
Impingement angle: 90 degrees
Total test time: 120 minutes
Erosion Rates Measured
Hardide-T Erosion Rate: 1.38 mg per hour
HVOF coating 85WC-10Co-4Cr: 5-15 mg per hour
Stainless steel: 171 mg per hour
Hardide-T erosion rate was measured
7x lower as compared to the average value of HVOF 85WC-10Co-4Cr
125x lower than stainless steel

ASTM G76-95 Erosion Resistance Test

Erosion resistance tests were performed in accordance with ASTM G76-95. Aluminium oxide (particle size 50 microns) was used as the erosive material with a particle velocity of 70m/sec. The graph below presents the test results and comparative results for other hard materials at various angles of impact.

Erosion by Alumina hard particles carried by gas jet at 70 m/sec

The Hardide coating erosion rate was 0.017 – 0.019 mm3/g which is significantly better than the erosion rate of the tested types of Cemented Carbide, White Iron, Hard Chrome and Chrome Carbide weld overlay. The Hardide coating resists erosion by alumina particles at 70m/sec; three times better than steel and more than two times better than Cemented Carbide (hardmetal).

ASTM G76-95 test samples – Hardide coating showing erosion by Alumina hard particles carried by gas jet at 70 m/sec at varying angles of imact

ASTM G75 Miller Slurry Abrasion Response of Materials

The Hardide coating also significantly exceeded various currently used hard materials in a sand/water erosion test.

ASTM G75 Miller Slurry Abrasion Response of Materials