Chip Resistance

BS AU 148: Part 15

 Chip Test

Scope and Field of Application

BS AU 148: Part 15 is a method of providing information regarding the resistance of a paint system to chipping by the impact of gravel and grit thrown up from road surfaces. We use it to test automotive finishes.

There are no pass/fail criteria defined in the standard. This is a matter of agreement between the parties concerned.

The actual standard is a copyright-protected document and we are not able to provide you with copies. If required however, you can easily obtain copies from the British Standards Institution.

Summary of Method

The test involves dropping 100 quarter-inch diameter hexagonal metal nuts down a 4.5 metre long vertically-mounted tube onto a test panel. The standard includes a set of 6 drawings showing gradations of damage to a paint surface ranging from very slight to very severe. The test panel is compared with these drawings and given the rating of the drawing that resembles it most closely.

Sample Requirements

We require 3 coated panels (150 x 100 mm) on an appropriate substrate.

If you wish, we can prepare the test panels. The quantity of liquid paint we needs depends on the method of application. We will be pleased to advise you regarding our requirements.

Accreditation

PRA is accredited to ISO 17025 by the United Kingdom Accreditation Service (UKAS) to carry out this test.

 

 

Please contact Peter Collins for further details.

 

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