Introduction of Condensing Function of UV Aging Test Chamber
Although there is only 5% UV light in the sun, it can cause very large chemical damage to durable materials exposed to the outdoors for a long time. In this case, our UV aging test chamber is required. The ultraviolet aging test chamber can simulate the damage caused by sunlight and dew, simulate the effect of sunlight by ultraviolet light, simulate rainwater and dew with condensed moisture, and test the materials under the alternating temperature of light and moisture at a certain temperature. Types of hazards include: fading, discoloration, loss of light, chalking, cracking and blistering, embrittlement strength degradation, and oxidation.
Condensation function introduction:
The UV aging test chamber simulates the effects of rain and dew on the surface of the sample with a unique condensing unit. During the condensation cycle, a test tank in the lower part of the test inner shell is heated to generate steam. The hot steam maintains 100% relative humidity in the test chamber and has a certain temperature rise. The sample constitutes the inner side wall of the test chamber and the cooling effect of the ambient air. The temperature difference such that the temperature of the test surface is lower than the steam temperature allows the liquid water to continuously condense on the test surface throughout the condensation cycle. The resulting condensate is a very stable, pure distilled water that does not contain dissolved solids, which contributes to the reproducibility of the test results while eliminating water stains. Moreover, like natural dew, the newly condensed water is saturated with dissolved oxygen, so it must have a strong erosive force.
Another advantage of this unique condensing system is that the test does not require the use of distilled or deionized water. The test chamber can use ordinary tap water, which is automatically distilled during the evaporation process and then condensed onto the sample. Due to the wet time during outdoor exposure for up to 12 hours per day, the wetting cycle of this chamber usually lasts for several hours. Please note that the UV exposure and condensation process in this equipment should be carried out separately, as in natural weather conditions.