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 sae j1960 test to predict long term performance.
SAE J | Rycobel
While you 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. In the automotive industry, they use the SAE J standard to evaluate weathering of exterior plastic materials by accelerated means. Some polymers undergo heat degradation that cause yellowing or darkening not at sae j1960 due to UV.
These tests assume the 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. You make a good point about the light source though. Still, it’s a conundrum sae j1960 considering accelerated tests like Xenon Arc or even oven aging, to test under more severe sae j1960 to wae sae j1960 over very long periods of time i.
SAE J1960: How does it correlate to Florida exposure
When this test temperature is lowered to 63C, the effect sae j1960 discoloration is much less pronounced and we can focus sae j1960 on the UV effects.
It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages.
sae j1960 While this sometimes results in faster same-type degradation hence the yr Miami “equivalent” it can both cause sae j1960 not seen in outdoor exposures as well as cause different kinds sae j1960 changes some actually less severe! First, it is important to understand that the spectral power distribution light intensity vs. One other factor is that this type of comparison, based on a single factor solar radiant energy does not take into account the other weathering factors of heat, moisture, etc.
This public forum has 60, threads. Has there been sae j1960 activity focused on changing the light source and filters to more accurately predict real life exposure?
sea Automotive OEM’s require this. We see the same thing in tests like UL for wire and cable. Either sae j1960, it can be a non-predictive test for some materials.
So when comparing J sae j1960 outdoors, you’re comparing apples to oranges and they don’t equate. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer.
While the automotive OEM’s and suppliers use J swe or modified for preliminary sae j1960 approval, they still conduct outdoor testing to validate the interim results and develop models for materials that “correlate” the lab exposure to real sae j1960 weathering. 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.
Since Planck’s law says that photon energy is sae j1960 proportional to wavelength, this low wavelength UV has sufficient energy to cause much more damage to organic materials than sunlight.