Accelerated Weathering Tester using a QUV equipment simulates the damage caused by sunlight, rain and dew. In a few days or weeks, the QUV can reproduce the damage that occurs over months or years outdoors. Experiments are performed with elevated temperatures, UV lamps, condensation and/or spray. The QUV’s fluorescent lamps simulate UV light from the sun and reproduce the physical damage to materials caused by sunlight. Different lamps, encompassing different wavelengths, can be used to simulate realistic degradation (via UVA-340 lamps) or unrealistic, severe degradation (UVB-313 lamps). In addition to condensation, spraying can also be used to induce thermal shock, resulting from the rapid dissipation of heat, upon the addition of cooler water droplets. Types of damage include colour change, gloss loss, chalking, cracking, crazing, hazing, blistering, embrittlement, strength loss, and oxidation.
At CREST, QUV accelerated weathering can be performed with either UV/condensation or UV/condensation/spray. Light sources of either 340 nm (UVA-340) or 313 nm (UVB-313) can be used. Experiments are run within the specified guidelines of international standards; ASTM G154, ISO 4892, ISO 16747, ASTM D4329. Additional standards can be performed upon request. Typical samples for testing include plastics, coated substrates (metallic or plastic), raw metallic substrates, and paint coated metallic substrates.