SAE J2412 is a performance based standard for accelerated weathering that uses a Xenon Arc as a light sources to simulate indoor exposure to sunlight on an accelerated basis. Micom Laboratories offers SAE J2412 test services as part of its offering for UV testing and Automotive testing. This standard calls up practice ASTM G155 while specifying specific test and monitoring conditions. Testing to ASTM G155, using a proper filter combination, allows to reproduce the weathering effects occurring when materials are exposed to sunlight through window glass, heat and moisture.
SAE J2412 – Experimental parameters
Contrary to ASTM G155 where many parameters need to be specified, SAE J2412 is very specific as to what test conditions need to be used. It also differs from SAE J2527 in that in simulates indoor instead of outdoor conditions. The operational parameters are as follow:
- Inner lamp filter: quartz
- Outer lamp filter: Borosilicate
- Lamp irradiance level: 0,55 watts X meter-2 X nm-1
- Chamber air temperature – light cycle: 62 oC
- Chamber air temperature – dark cycle: 38 oC
- Chamber relative humidity – light cycle: 50 %
- Chamber relative humidity – dark cycle: 95 %
- Black panel temperature – light cycle: 89 oC
- Black panel temperature – dark cycle: 38 oC
- The timing of light/dark cycle with sample surface spray:
SAE J2412 – quality control
SAE J2412 requires the use of reference polystyrene chips as a mean to monitor the test performance. The chips are exposed to a set of specific time intervals. The chips color is monitored per ASTM D2244, on the b axis and the color change is monitored for each time interval. The measured color change must fall within the acceptable range specified by the reference polystyrene chip supplier
Other related test methods
If you have any questions about the SAE J2412 test, we invite you to contact our material testing lab today. It will be our pleasure to discuss this test and help you with your custom testing requirements.
We also invite you to download our PDF on the true color measurement: What is the difference between the “true” color of an item and its “perceived” color (by the human eye)?
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