Application Examples

for standardized tests, check 'our tools' page

The need for an abrasion and an erosion method

WHY ? : Abrasion and erosion mechanisms are quite different from each other, and can lead to very different material behaviour.  For instance, a hard and brittle surface may be very resistant to abrasion, but sensitive to erosion under 90° impact. 

HOW ? : Using two separate test systems :

- ASTM G65 describes the method to rub solid particles tangentially over a material.  'Dry sand rubber wheel abrasion'.  ASTM G75 uses a similar motion, but reciprocating and in a wet slurry.  But it's still abrasion.

- ASTM G76 on the contrary describes how to impact with a gas flow carried stream of particles on a surface under varying angles, between 90° perpendicular impact and 15°.

RESULT : ductile vs. brittle materials behave very differently, depending on the impact angle of particles, and by extension, depending on whether it's abrasive vs. erosive conditions.

Afbeeldingsresultaat voor erosion ductile brittle

 

Continue reading
© 2017 Falex Application Center for industrial Tribology