Method and Results
Method:
The next device to be used is the Thermal Shock Chamber, ASTM D2337. This is simply a temperature control device in which temperature can be raised or lowered over a controlled period of time. For purposes of our testing, we started with an upper temperature of 160ºF (71ºC), and lowered the temperature to -20ºF (-29ºC). Two cycles were performed, each consisting of 3 hours. This is done to simulate the extreme conditions found in nature and as a means of inducing coating failure. |
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| Results: None of the coated test panels exhibited any visible evidence of coating degradation. The uncoated control panel exhibited additional surface rusting. Printed from National
Testing Standards, Inc., Report: Method: After accelerated weathering
all ten of the submitted test panels were thermal cycled (ASTM
D-2337) between 160°F and –20°F. Two cycles were
performed each consisting of 3 hours. |
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