Falling Sand Abrasion Tester0 pages

Falling Sand Tester 820
Surface Abrasion Testing

Simple and effective means to evaluate abrasion resistance
This widely used method of abrasion testing has been employed
for over 70 years to evaluate coatings applied to a plane rigid
surface, such as a metal or glass panel. Described in internationally
recognized test standards such as ASTM D968, this apparatus is
normally used for testing paint, varnish, lacquer and other organic
coatings. Abrasion Resistance is expressed in terms of the volume of
abrasive required to wear through a unit thickness of the coating.
Proven design built for durability
Standardized abrasive particles placed in a reservoir are released
and guided by a straight, smooth bore tube to impinge on a
specimen fixed under the guide tube at a 45° angle. A sturdy base
and support system hold the apparatus in a vertical position. The
specimen receptacle includes an opening so used abrasive
particles can be collected.
Choice of abrading sands
Standardized natural silica sand, commonly referred to as Ottawa
sand, along with silicon carbide grain are popular abradants for this
apparatus. Silica sand has been characterized by its roundness of
grains and produces a slower rate of abrasion compared to silicon
carbide. However, for certain coatings, the silica sand may provide
greater discrimination.

Note: Due to the quantity of abrasive required, this instrument may not be suitable for extremely durable coatings.