Erosion Resistance Tests

ASTM G76-95 Erosion Resistance

Erosion resistance tests were performed in accordance with ASTM G76-95; velocity was 70m/sec and aluminium oxide (particle size 50 microns) was used as the erosive material. The graph below presents the test results and comparative results for other hard materials at various angles of impact. The Hardide 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. Hardide resists erosion by alumina particles at 70m/sec; three times better than steel and more than two times better than Cemented Carbide (hardmetal). Hardide also significantly exceeded various currently used hard materials in a sand/water erosion test.

Hardide-T Erosion Resistance 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