SAE J is a guide for comparing the performance of test equipment. SAE J and J gave automotive manufacturers the opportunity to standardize . 22 Apr SAE J SAE J is the performance standard based on the test parameters of SAE J Use of xenon arc test apparatus to perform. 29 Jul Cascade TEK has placed an order for an Atlas Ci Weather-Ometer Test System. This new machine meets international test standards for.
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This public forum has 60, threads. Still, it’s a conundrum when considering accelerated tests like Xenon Arc or even oven aging, to test under more severe requirements to predict performance over very long periods of time sae j1960.
SAE J1960: How does it correlate to Florida exposure
One other factor is that this type of comparison, based on a single factor solar radiant energy does not take into account the sae j1960 weathering factors of heat, moisture, etc. While this sometimes results in faster same-type degradation hence the yr Miami “equivalent” it can both cause failures not seen in outdoor exposures as well as cause different sae j1960 of changes some actually less severe!
We see the same thing in tests like UL for wire and cable. While you might think that sae j1960 would just result in a shorter test time, it has frequently been shown that the SAE J test as written has the potential to change the photochemiisty of degradation. Automotive Eae require this. While the automotive OEM’s sae j1960 suppliers use J as-written or modified for preliminary material approval, they still conduct outdoor testing to validate the interim results and develop sae j1960 for materials that “correlate” the lab exposure to real outdoor weathering.
When this test temperature is sae j1960 to 63C, the effect of discoloration is much less pronounced and we can focus mostly on the UV effects. You make a good point about the light source though. In the automotive industry, they use the SAE J standard to evaluate weathering of exterior plastic materials by accelerated means.
These tests assume sae j1960 time-temperature superposition principle without taking into account thermooxidative effects at higher temperatures, or the deleterious effects of shorter wavelength light and thus higher energy. The SAE J test does include heat ageing 83C and water spray cycles so it should m1960 for some of these other effects you mention.
All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. Has there been any activity focused on changing the light source and filters to more accurately predict real sae j1960 exposure?
SAE J How does it correlate to Florida exposure
It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. First, sae j1960 is important to understand that the spectral power distribution light intensity vs.
Since Planck’s law says that photon energy is inversely proportional to wavelength, this low wavelength UV has sufficient sae j1960 to cause much more damage to organic materials than sunlight.
So when comparing J to outdoors, you’re comparing apples to oranges and sae j1960 don’t equate. Some polymers undergo heat degradation that cause yellowing or darkening not at all due to UV.
We use SAE Sae j1960 heavily for automotive and non-automotive weathering as a defacto test to predict long term performance. Either way, it can be a non-predictive saae for some materials.