Method and Results
Method:
The first test performed at National Testing Standards, Inc.
was the Weatherometer, ASTM G153. The Weatherometer device
uses a combination of carbon arc UV radiation and water spray
to simulate destructive weather conditions in an accelerated
manner. Although precise equivalents are impossible to determine,
a practical calculation is: 300 hours in the Weatherometer
equals one year real time. All ten of the test panels were
exposed to 168 hours of accelerated weathering in an Atlas
Weatherometer, model 18W type HH. The apparatus and operation
was in accordance with the procedures set forth in ASTM G153. |
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| Results: None of the nine coated test panels exhibited any degradation of the integrity of the coating. The uncoated control panel exhibited light surface rusting. Printed from National
Testing Standards, Inc., Report: Method: All nine of the coated
test panels were scribed down to the metal substrate and exposed
to 168 hours of accelerated weathering in an Atlas Weatherometer
model 18W type HH. The apparatus and operation was in accordance
with the procedures set forth in ASTM* G-153. The uncoated control
panel was similarly exposed. |
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