Detection method for quickly evaluating weatherability of coating
A detection method and weather resistance technology, which is applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of attenuation, coating strength decline, heat resistance performance decline, etc., and achieve reasonable test methods and weather resistance The advantages and disadvantages are reasonable, and the effect of generally long development cycle is solved
Inactive Publication Date: 2015-08-05
CHINA FIRST AUTOMOBILE
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The coating has a decrease in strength, h...
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[0105] Embodiment: The present invention is verified by the results of long-term natural exposure test (2 years).
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The invention relates to a detection method for quickly evaluating weatherability of a coating. The method is characterized by comprising the following specific steps: preparing a test sample, testing and analyzing UV (Ultraviolet) transmittance, testing and analyzing secondary UV transmittance, calculating to obtain the change rate of the secondary UV transmittance after 3-month natural exposure testing or 500-hour artificially accelerated aging testing of the tested coating, and analyzing the advantages and disadvantages of the weatherability of the coating. By using the detection of the UV transmittance of the coating, whether the intrinsic property of the coating changes can be quickly judged through the change condition of the UV transmittance of the coating after 3-month natural exposure testing or 500-hour artificially accelerated aging testing, and further the weatherability of the coating is quickly evaluated through test data after detection of a standard instrument. The detection method has the characteristics of quickness, good reproducibility, accurate relation, low testing cost and the like; meanwhile, the relevance of outdoor natural exposure testing and artificially accelerated aging testing can be established.
Description
technical field [0001] The invention relates to a detection method for quickly evaluating the weather resistance of coatings, belonging to the technical field of coatings and coatings. Background technique [0002] Usually, the weather resistance test of the coating adopts the outdoor natural exposure test and the artificial accelerated aging test. Performance, chemical properties, and mechanical properties, etc., so as to predict the possible aging phenomenon and service life of the coating in the actual use process in the future. [0003] The outdoor natural exposure test is carried out under certain typical natural environmental conditions. Generally, it takes a long time. According to the test requirements, the shortest test period also takes 1 to 2 years. Therefore, the test period to judge the weather resistance of the coating is relatively long and the cost is high, but it is a test method that can best reflect the actual service life of the coating. [0004] The a...
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Inventor 王纳新张馨月廖大政高成勇李文刚
Owner CHINA FIRST AUTOMOBILE
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