Materials such ascoating、Building plastics, rubber products, etc., used outdoors to withstand the weather test, such asillumination、Cold and hot、wind and rain、BacteriaThe resistance to comprehensive damage caused by, etc. is called weatherability.English: Weather fastness,weatherability；weathering resistance
Various weather resistantdeterminationMethods, such as variousageingTest, simulating natural climatic conditions, and conducting the test.ascoatingWeather resistance testalso calledAtmospheric exposure test, assess the impact of the coating itself on the atmosphereDurability。The weather resistance of leather can beWeathering test chamber(orAging chamber, accelerated weathering tester).
Main impacts
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Weather resistance refers toplasticFading and discoloration due to external conditions such as sunlight, temperature change, wind and rain, etc,Cracking,A series of aging phenomena such as pulverization and strength decline.The ultraviolet radiation is to promotePlastic agingKey factors of.
Light, high temperature and humidity are the main reasons for the loss of light, fading, yellowing and chalking of vehicle paint coatings. The weather resistance of paint coatings is related to the spectral sensitivity of paint components.
Automotive CoatingsThe main resin is mainly composed ofepoxy resin、Amino resin、polyester resinIt contains carbon oxygen double bond, carbon carbon single bond and other functional groups.Different functional groups have different sensitivity to light due to different bond energy, resulting in different weather resistance.
For automotive coatings, ultraviolet radiation is the main reason for coating aging.The ultraviolet accelerated aging test can simulate the damage of the ultraviolet part of the sunlight on the paint coating, and reproduce the hazards that occur outdoors for months or even years in a few days or weeks.
It can help to select new materials and evaluate the influence of material formula on durability, so as to achieve the purpose of verifying coating performance.
