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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We use SAE J heavily for automotive and non-automotive weathering as a defacto test to predict long term performance. It’s not possible to diagnose a finishing problem or sae j1960 hazards of an operation via these pages.
SAE J1960: How does it correlate to Florida exposure
While you might think that se 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. This public forum has 60, threads. Since Planck’s law says that photon energy is inversely proportional to wavelength, this low sa UV has sae j1960 energy to cause much more damage to organic materials than sunlight. In the automotive industry, they use the SAE J standard to evaluate weathering of sae j1960 plastic materials by accelerated means.
Either sae j1960, it can be a non-predictive test for some materials. These tests assume the time-temperature superposition principle without taking sae j1960 account thermooxidative effects at higher temperatures, or the deleterious effects of swe wavelength light and thus higher energy.
The SAE J test does include heat ageing 83C and water spray cycles so it should account for some of these other effects you mention. When this test temperature is lowered to 63C, the effect of discoloration is much less pronounced and we can sae j1960 mostly on the UV effects. While the automotive OEM’s and sae j1960 use J as-written or modified for preliminary material approval, they still conduct outdoor testing to validate the sae j1960 results and develop models for materials that “correlate” the lab exposure to real outdoor weathering.
SAE J | Rycobel
You make a good point about the light source though. Sae j1960 OEM’s require this. We see the same thing in tests like UL for wire and cable.
Has there been any activity sae j1960 on changing the light source and filters to more accurately predict real life exposure? First, it is important to understand jj1960 the spectral power distribution light intensity vs. Still, it’s a conundrum when considering accelerated sse like Xenon Arc or even oven aging, to test under more severe requirements to predict performance over very long periods sae j1960 time i.
One other factor is that this type of sae j1960, based on a single factor solar radiant energy does not take into account the other weathering factors of heat, moisture, etc. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. Some polymers undergo heat degradation that cause yellowing or darkening not at all due to UV.
So when comparing J to outdoors, you’re comparing apples to oranges and they don’t equate. While sae j1960 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 kinds of changes some actually less severe!