Aging Test Method for Powder Sprayed Aluminum Profile

September 21, 2020

Latest company news about Aging Test Method for Powder Sprayed Aluminum Profile

Like other materials, when aluminum alloy building profiles are affected by factors such as light, temperature, humidity, etc. under atmospheric conditions, they will produce aging phenomena such as fading, chalking, cracking, blistering, and surface peeling, which will affect the performance and appearance of the product. . Therefore, the weather resistance of aluminum alloy building profiles is an important indicator of product development and quality control.


The aging test of powder-coated aluminum profiles includes two methods: outdoor atmospheric test and laboratory accelerated test
1.Outdoor exposure is cheap, easy to operate but long time
2.Accelerated testing can achieve 1-2 years of exposure in a shorter time


The principle of laboratory accelerated aging
Laboratory accelerated weathering tests mainly use xenon lamp and ultraviolet test equipment, but their test principles are completely different.


The aging principle of xenon lamp test chamber
The xenon lamp test chamber can simulate the full spectrum of sunlight, including ultraviolet, visible and infrared. Xenon lamp spectrum has two influence factors: filter system and light source stability. The spectrum generated by the xenon lamp must be filtered to reduce unwanted spectral components. Use different types of glass filters to get different spectra. The use of the filter depends on the tested material and the final use conditions of the material. The amount of short-wavelength ultraviolet rays in the spectrum obtained after filtering by different filters is different, which will greatly affect the speed and type of aging. There are three types of filters that are frequently used: daylight, window glass, and UV extension filters.


The aging principle of UV testing machine
QUV uses fluorescent ultraviolet lamps to simulate the damage caused by sunlight to durable materials. Ultraviolet lamps are similar in electrical principle to lamps used for general lighting, but they mainly emit ultraviolet light instead of visible light.
For different application conditions, different types of lamps are required to produce different spectra. The UVA-340 tube has a good simulation effect on the ultraviolet short-wavelength light of sunlight.