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.
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 impact
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.