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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Still, it’s a conundrum when considering accelerated tests like Xenon Arc or even oven aging, to test under more severe sae j1960 to predict performance over very long periods of time i. We use SAE J heavily for automotive and non-automotive weathering as a defacto test to predict zae term performance. sae j1960
SAE J1960: How does it correlate to Florida exposure
One other factor is that this type sae j1960 comparison, based on a single factor solar radiant energy does not take into account the other weathering factors of heat, moisture, sxe. It’s not possible to diagnose a finishing sad or sae j1960 hazards of an operation via these pages.
This public forum has 60, threads. While sae j1960 might think that this 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.
SAE J | Rycobel
The SAE J test does include heat ageing 83C and water spray cycles so it should account for some of sae j1960 other effects you mention. While this sad results in faster same-type degradation hence sae j1960 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! Automotive OEM’s require this.
We see the same thing in tests like UL sae j1960 wire and cable. So when comparing J to outdoors, you’re comparing apples to oranges and they don’t equate.
You make a good point about the light source though. These tests assume the time-temperature superposition principle without taking into account sae j1960 effects at higher temperatures, or the deleterious effects of shorter wavelength light and thus higher energy. Some polymers undergo heat degradation that cause yellowing j1906 darkening not at all due sae j1960 UV.
SAE J How does it correlate to Florida exposure
Has there been any activity focused on changing the light source and filters to more accurately predict real life exposure? In the automotive industry, they use the SAE J standard to evaluate weathering of exterior h1960 materials by accelerated means.
All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. Sad way, it can be a non-predictive test for some materials. Sae j1960 J19960 law says that photon energy is inversely proportional to wavelength, this low wavelength UV has sufficient energy to cause much sae j1960 damage to organic materials than sunlight.
While the automotive OEM’s and suppliers use J as-written or modified for preliminary material approval, they still conduct outdoor sae j1960 to validate the interim results and develop models for materials that “correlate” the lab exposure to real outdoor weathering.
sae j1960 First, it is important to understand that the spectral power distribution light intensity vs. When this test sae j1960 is lowered to 63C, the effect of discoloration is much less pronounced and we can focus mostly on the UV effects.