1. Temperature Control Part
Temperature control is also very important for ultraviolet light aging test. When irradiated by ultraviolet light, temperature does not participate in the photochemical reaction of the test material, but temperature can affect the rate of light reaction. Generally, The rate of light reaction becomes faster as the temperature increases. Therefore, temperature control also becomes very important when irradiating ultraviolet light. During the UV aging test, the appropriate temperature can be selected according to the intensity of the UV light, and it is generally set between 50°C and 80°C. In addition, the blast system is used to make the temperature distribution in the box more uniform.
2. Wetting Cycle Part
The humidity of the air can also affect the aging and corrosion of the experimental materials, and the aging caused by the humidity is accelerated with the rise of temperature. Therefore, temperature control in a specific humidity environment can also achieve good corrosion and aging effects. In the UV aging tester, the temperature during the condensation process is controlled between 40 and 60°C. Because condensation and light are in different test stages, the temperature during condensation is different from the temperature used during ultraviolet light irradiation.
3. Ultraviolet Light Irradiation Part
The main core function of the ultraviolet light aging tester is ultraviolet light irradiation, which simulates the most harmful ultraviolet light in sunlight. The ultraviolet light content in sunlight is only 7%, but the main factor of aging in the natural environment is the effect of ultraviolet light. In the aging test, generally only need to simulate the ultraviolet light. When testing the material, the test material needs to be covered by the ultraviolet light in all directions. At present, the ultraviolet light aging test machine can carry out the full coverage of ultraviolet light.
4.Rain and Dew Condensation Part
The rain and dew condensation function of the UV aging tester mainly simulates the rain and dew in the natural environment. In the test box, the water in the water storage tank at the lower part of the shell is heated to generate a large amount of water vapor to keep the humidity in the box at 100%. The high-temperature water vapor condenses on the surface of the test sample to produce a condensation effect, which can produce a galvanic corrosion effect on the test product. In the process of rain and dew condensation, the general test needs to last for 12 hours to see obvious results.