Conversion Between Accelerated Aging of Xenon Lamp Aging Test Chamber And Outdoor Aging

Conversion Between Accelerated Aging of Xenon Lamp Aging Test Chamber And Outdoor Aging 

Generally speaking, it is difficult to have a detailed positioning and conversion formula for the conversion between accelerated aging of xenon lamp aging test chamber and outdoor aging. The biggest problem is the variability and complexity of the outdoor environment. The variables that determine the relationship between xenon lamp aging test chamber exposure and outdoor exposure include:

1. Geographical latitude of outdoor aging exposure sites (closer to the equator means more UV).

2. Altitude (Higher altitude means more UV).

3. Local geographical characteristics, such as the wind can dry the test sample or close to water will produce condensation.

4. Random changes in climate from year to year can lead to a 2:1 change in aging at the same location.

5. Seasonal changes (e.g., winter exposure may be 1/7 of summer exposure).

6. Direction of the sample (5° south vs. vertical facing north)

7. Sample insulation (outdoor samples with insulated backing age 50% faster than uninsulated samples).

8. Working cycle of xenon lamp aging box (light time and wet time).

9. The working temperature of the test chamber (the higher the temperature, the faster the aging).

10. Test the uniqueness of the sample.

11. Spectral Intensity Distribution (SPD) of laboratory light sources

Objectively speaking, accelerated aging and outdoor aging have no convertibility, one is a variable, one is a fixed value, the only thing to do is to obtain a relative value, rather than an absolute value. Of course, it is not to say that relative values have no effect; on the contrary, relative values can also be very effective. For example, you will find that a slight change in design may double the durability of standard materials. Or you may find the same looking material from multiple suppliers, some of which age quickly, most of which take a moderate amount of time to age, and a smaller amount that ages after longer exposure. Or you may find that less expensive designs have the same durability against standard materials that have satisfactory performance over actual service life, such as 5 years.