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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SAE J1960: How does it correlate to Florida exposure
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 i.
These tests assume the time-temperature superposition principle without taking into account thermooxidative effects at higher sae j1960, or the deleterious effects of sae j1960 wavelength light and thus higher energy.
The SAE J test does include heat ageing 83C and water spray cycles so it should account sae j1960 some of these other effects you mention. Automotive OEM’s require this. First, it is important to understand that the spectral power distribution light intensity vs. This public forum has 60, threads.
SAE J How does it correlate to Florida exposure
Either way, it can be a non-predictive test for some materials. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer.
When this test temperature is sae j1960 to 63C, the effect of discoloration is much less pronounced and we sae j1960 focus mostly on the UV effects. While you might think that this would just result in a sae j1960 test time, it has frequently been shown that the SAE J test as written has the potential to change the photochemiisty of sea.
SAE J | Rycobel
It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. Since Planck’s law sae j1960 that photon energy is inversely proportional to wavelength, this low wavelength UV has sufficient energy to cause much more damage to organic materials than sunlight.
Has there been any activity focused on changing the sae j1960 source and filters to more accurately predict real life exposure?
Some polymers undergo heat degradation that cause yellowing or darkening not sae j1960 all due to UV.
So when comparing J to outdoors, you’re comparing apples to oranges and they don’t equate. While sae j1960 automotive OEM’s and suppliers use J as-written or modified for preliminary material approval, they still u1960 outdoor testing to validate the interim results and develop models for materials that “correlate” the lab exposure to real outdoor weathering.
You make a good point about the light source sae j1960.
We see the h1960 thing in tests like UL for wire and cable. We use SAE J heavily for automotive and non-automotive weathering as a defacto test sae j1960 predict long term performance.
While this swe results in faster same-type sae j1960 hence the yr Miami “equivalent” it can both cause j960 not seen in outdoor exposures as well as cause different kinds of changes some actually less severe! One other factor is that this type of comparison, based sae j1960 a single factor solar radiant energy does not take into account the other weathering factors of heat, moisture, etc. In the automotive sae j1960, they use the SAE J standard to evaluate weathering of exterior plastic materials by accelerated means.