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Test Method for Abrasion Resistance of Organic Coatings

2019-03-29 16:51
ASTM D406-This test method covers the determination  of the resistance of  organic coatings to  abrasion produced by  the Taber Abraser on coatings applied to a plane, rigid surface, such as a metal panel.
This standard  does not  purport  to address  all of  the safety  concerns,  if  any,  associated  with  its  use.  It  is  the responsibility of the  user of this standard  to establish appropriate safety and health  practices and determine the applicability of regulatory limitations prior  to use.
The organic coating is applied at uniform thickness to a plane, rigid panel and,  after curing, the surface is  abraded by rotating the panel under weighted  abrasive wheels.Abrasion resistance is calculated as  loss in weight at a specified  number of  abrasion  cycles, as  loss  in weight  percycle, or as number of cycles required to remove a unit amount of coating thickness.
Test Specimens
Apply a uniform coating of the material to be  tested to a plane, rigid panel. Specimens shall be a disk 4 in. (100 mm)in diameter  or a  plate 4 in.  (100–mm) square with  rounded corners and  with a 1⁄4-in. (6.3-mm)  hole centrally located on each panel. Prepare  a minimum of two  coated panels for the material.
Test Procedure
1、Weigh the  test specimen  to  the nearest  0.1 mg  and record this weight, if either  the wear index or the weight loss is to be reported.
2、Measure the coating thickness of the test  specimen in several locations along the path  to be abraded.
3、Mount the  test specimen  on the  turntable. Place  the abrading heads on the test film and the vacuum pick-up nozzle in  position as  outlined  in .  Set  the counter  and  suction regulator as outlined .
4、Start the vacuum pick-up and then the turntable of the abrader. Subject the test specimen to abrasion for the specified number  of  cycles or  until  wear  through  of  the  coating is observed. In determining  the point of  wear through, stop the instrument at intervals for examination  of the test specimen.
5、Remove any  loose  abradings  remaining on  the  test specimen by light brushing. Reweigh  the test specimen.
6、Repeat 10.1-10.5 on at least one additional test  specimen of the material under  test.

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