Material aging is mainly manifested in discoloration, loss of light, loss of strength, cracking, peeling, chalking and oxidation. Although we all agree that the weathering and light resistance of products is important, but for the laboratory, whether to use the UV weathering chamber test or xenon lamp aging test? But often have no idea.
The first thing we need to know is that the main factors of aging are the following three points.
1. light (especially UV), for durable materials, such as most coatings, plastics, short-wave UV is the cause of most polymer aging. However, for materials that are not so durable, long-wave UV and even visible light can cause serious harm.
2. High temperature, when the temperature increases, the damaging effect of light will also increase, although the temperature does not affect the main photochemical reactions, but the subsequent chemical reactions. Laboratory aging tests must provide precise temperature control, usually also through the method of heating to accelerate aging.
3. Moisture, dew causes more damage than rain because it sticks to the material longer, creating more severe moisture absorption. However, what cannot be ignored is the thermal shock caused by a sudden drop in temperature. For example, when a car in a hot summer day temperature rise but suddenly due to showers and rapid heat dissipation, the rain in this case will produce stress erosion.
UV weathering test chamber material>
1, shell material: A3 steel plate spraying treatment;
2, the inner liner material: imported SUS stainless steel plate;
3, the box cover material: A3 steel plate spray plastic treatment;
4, in the studio on both sides of a total of 8 UV series UV lamps installed;
Back to the beginning of the question, the material weathering test UV weathering chamber or xenon lamp tester? There is no one testing technique that can meet all materials and application conditions. The method you choose depends on your testing objectives, which variations are of concern, time schedule, budget, etc.