Principle of Xenon Lamp Aging Test
December 7, 2020
The xenon arc light filtered by the filter is used to artificially weather the coating or artificially expose it to radiation. The purpose is to make the coating undergo a certain degree of exposure to radiation energy to change the selected performance to a certain extent. Or to make the coating reach a certain degree of aging required for the exposure radiation energy.
The performance selected for testing should be an important performance of the coating in practical applications. The performance of the exposed coating can be compared with the performance of the same prepared unexposed coating (comparative sample).
In natural climates, solar radiation is considered to be the main cause of coating aging, and the principle of exposure radiation under window glass is the same. Therefore, for artificial weathering and artificial exposure to radiation, it is very important to simulate solar radiation.
During the test of the exposure equipment, the irradiance may change due to the aging of the xenon arc and the filter system. This change occurs especially in the ultraviolet range that has the greatest impact on the photochemistry of polymer materials. Therefore, it is not only necessary to measure the exposure time, but also to measure the wavelength range below 400nm or the exposure radiation energy at a specified wavelength, such as 340nm, and use these values as the reference standard values for coating aging.
●ISO 4892-2:2013 (plastics)
Plastics-Laboratory light source exposure methods
●ISO 11341:2004 (paints and varnishes)
Paints and varnishes--simulating natural aging and exposure to simulated radiation-exposure to filtered xenon arc radiation
●ASTM G155-2013 (Non-metallic materials) Operating rules of xenon arc lamp equipment for exposure of non-metallic materials
●ASTM D2565-2016 cycle 1 (plastic, outdoor) outdoor plastic xenon arc exposure protocol
●ASTM D4459-2012 (plastic, indoor) xenon lamp aging exposure regulations for indoor plastics
●ASTM D6695-2016 (Coatings) Xenon Arc Exposure Specification for Paints and Related Coatings