The weather resistance test refers to the weather resistance of the coating or coating, and is an important indicator for evaluating the durability of the coating or coating. The weather resistance test sometimes refers to the ability to resist photoaging such as long-term sunlight such as ultraviolet light and long-term temperature changes (temperature differences).
For weather resistance tests, natural weather aging tests and artificial accelerated light aging tests are commonly used, which are mainly tests for light-sensitive coatings or certain coatings, including arc lamp irradiation or carbon arc lamp irradiation, Artificially accelerated weathering test methods such as ultraviolet light irradiation.
The natural weather aging test method is widely used at home and abroad, the main reason is that the natural weather aging test results are more realistic, the cost is lower and the operation is simple and convenient. Although the natural weather aging test can be carried out in any place, the internationally recognized test site is similar to the exposure test site in Florida in the United States because of its abundant sunlight.
However, the shortcoming of the natural weathering test is that the test takes a long time, and Testers may not have so many years to wait for the test results of a product. In addition, even in a satisfactory exposure test site, the climate cannot be exactly the same year after year, so the reproducibility of the test results is not satisfactory. Therefore, artificial weathering tests are often used.
