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Explain the light and rain test conditions of the box-type ultraviolet aging test chamber
Explain the light and rain test conditions of the box-type ultraviolet aging test chamber
The ultraviolet aging test box uses fluorescent ultraviolet lamps as the light source, and conducts accelerated weather resistance tests on materials by simulating ultraviolet radiation and condensation in natural sunlight to obtain the weather resistance results of the materials. The UV test chamber can simulate the environmental conditions such as UV, rain, high temperature, high humidity, condensation, darkness, etc. in the natural climate. By reproducing these conditions, they can be combined into a cycle and let it automatically execute the cycle times. This is the working principle of the UV aging test chamber.
1. Simulated ultraviolet rays: The ultraviolet rays in the sun are the main factor causing the damage to the durability of most materials. In the experiment, we use an ultraviolet lamp to simulate the short-wave ultraviolet part of sunlight, which produces little visible or infrared spectrum energy. We can choose different wavelength UV lamps according to different test requirements.
2. Temperature control: In each cycle, the temperature can be controlled at a set value. The temperature can be monitored by observation during the test. The increase in temperature can accelerate the aging process of the test, and temperature control is more important for the reproducibility of the test.
3. Humid condensing environment: Studies have shown that the main cause of this outdoor humidity is dew, not rain. Condensation function to simulate outdoor moisture erosion. During the condensation cycle during the test, the water in the reservoir at the bottom of the test chamber is heated to generate hot steam, the sample is fixed on the side wall of the test chamber, and the test surface of the sample is exposed to the ambient air in the test chamber. The outer side of the sample is exposed to the natural environment, resulting in a temperature difference between the inner and outer surfaces of the sample. The appearance of this temperature difference causes the sample to have liquid water condensed on the test surface during the entire condensation cycle.
4. Sprinkler system: Water spray can better simulate the environmental conditions of the final use. Water spray is very effective in simulating thermal shock or mechanical erosion caused by drastic temperature changes and rain erosion. Under certain practical application conditions, such as sunlight, when the accumulated heat is quickly dissipated due to sudden showers, the temperature of the material will change sharply, resulting in thermal shock, which is a kind of thermal shock for many materials. test. High and low temperature test box, constant temperature and humidity test box, salt spray corrosion test box, thermal shock test box, xenon lamp weather resistance test box, ultraviolet aging test box, etc.