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The durability of coating on car fog lamp glass cover refers to the ability of coating to maintain its anti-fog performance in the long-term use process in the face of erosion by various environmental factors (such as ultraviolet rays, temperature changes, humidity changes, etc.). The durability of coating is not only related to the lighting effect of fog lamp, but also directly affects the driving safety and driving experience of the driver. If the coating has poor durability and is easily damaged by environmental factors, resulting in a decrease in anti-fog performance, the lighting effect of fog lamp in bad weather will be greatly reduced, and may even fail completely, posing a great hidden danger to driving safety.
Environmental factors affecting coating durability
Ultraviolet rays: Ultraviolet rays are the shortest wavelength and most energetic part of sunlight, and they have strong penetrating and destructive power. Long-term exposure to strong ultraviolet rays will gradually decompose the chemical components in the coating, resulting in a decrease in coating performance and a weakened anti-fog effect.
Temperature changes: During the use of the car, it will experience repeated changes from low temperature to high temperature. This temperature change will cause the coating to expand and contract due to heat and cold, resulting in stress inside the coating, which will cause problems such as cracking and shedding of the coating.
Humidity changes: Humidity changes will cause changes in the moisture content on the surface of the coating, which will affect the anti-fog performance of the coating. Especially in a high humidity environment, a water film is easily formed on the surface of the coating. If the coating cannot quickly absorb and diffuse moisture, the anti-fog effect will decrease.
In order to ensure that the coating of the automotive fog lamp glass cover can maintain a stable anti-fog effect in actual use, manufacturers will conduct a series of rigorous tests to evaluate the durability of the coating. These tests mainly include accelerated aging tests, long-term exposure tests, etc.
Accelerated aging test: Accelerated aging test is a test method that accelerates the aging process of the coating by simulating extreme environmental conditions such as high temperature, high humidity, strong ultraviolet rays, etc. In this way, manufacturers can evaluate the performance changes of the coating during long-term use in a shorter period of time. Accelerated aging tests usually include thermal aging tests, light aging tests, wet heat aging tests, etc. Through these tests, manufacturers can understand the aging speed of the coating under different environmental factors, as well as the changes in the performance of the coating after aging.
Long-term exposure test: Long-term exposure test is a test method that places the coating sample in the natural environment and observes its performance changes for a long time. This method can more truly reflect the performance of the coating in actual use. Long-term exposure tests usually need to be carried out under different climatic conditions, such as high temperature and high humidity, low temperature and low humidity, strong ultraviolet rays, etc. Through these tests, manufacturers can understand the durability and stability of the coating under different climatic conditions.
In order to improve the durability of the coating of the automotive fog lamp glass cover, manufacturers can adopt the following strategies:
Optimize the coating formula: Improve the weather resistance and anti-aging ability of the coating by improving the chemical composition and formulation of the coating. For example, add additives such as anti-ultraviolet agents and antioxidants to enhance the anti-aging performance of the coating.
Improve the coating process: Optimize the coating coating process, such as adjusting the coating temperature, coating speed and other parameters to improve the uniformity and adhesion of the coating. At the same time, strengthen the control of the coating drying and curing process to ensure that the coating is fully cured and improve its durability and stability.
Strengthen coating protection: Add a protective film or protective layer on the surface of the coating to improve the coating's anti-scratch and anti-wear capabilities. Avoid long-term exposure of the coating to harsh environmental conditions, such as strong ultraviolet rays, high temperature, etc., to extend the service life of the coating.
