Acceleration test and equivalence estimation method of simulation coating under marine atmospheric environment
An accelerated test, marine and atmospheric technology, applied to effectively evaluate the change of coating performance in the marine and atmospheric environment, multi-factor cycle combined accelerated test, rapid evaluation of the coating's marine and atmospheric environment adaptability, can solve the reliability test that affects the test results Problems such as method practicability, coating performance degradation, loss of gloss, discoloration, chalking and blistering
Inactive Publication Date: 2015-04-29
NO 59 RES INST OF CHINA ORDNANCE IND
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Problems solved by technology
A large amount of data shows that the coating is aging due to the comprehensive influence of various environmental factors during use, especially the marine atmospheric environment with high radiation, high temperature, high humidity, and high salt spray is more likely to deteriorate the performance of the coating, resulting in Aging phenomena such as loss of light, discoloration, pulverization, and foaming seriously affect product performance and appearance. In consideration of market competition, manufacturers urgently need to obtain multi-factor combined accelerated test methods that can be used to quickly simulate marine atmospheric environment exposure tests , and a method that can equivalently evaluate the main performance changes of the coating in the marine atmospheric environment, so as to achieve the purpose of rapid screening, improvement and optimization of the coating
[0003] At present, most of the accelerated tests for simulating the marine atmospheric environment in the laboratory only consider a single environmental factor or multiple single environmental condition factors are applied to the coating surface sequentially, which cannot well simulate the marine atmospheric environment. Various environmental factors are applied to the coating comprehensively at the same time Surface conditions, especially the synergistic effect of multiple factors such as solar radiation, alternating wet and dry conditions, and temperature cycles on the coating, have seriously affected the reliability of the test results and the practicability of the test method.
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Embodiment 1
[0050] Example 1: The natural environment atmospheric exposure test was carried out at Wanning Test Station in Hainan, which has a typical marine atmospheric environment. The test site is 95 meters away from the coastline. The test surface of the model faces south and is exposed at an angle of 45° to the horizontal plane. The detection cycle is: 1 Month, 2 months, 3 months, 6 months, 9 months, 12 months, the color difference, gloss, and Fourier infrared spectrum of the samples are tested every cycle.
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Abstract
The invention discloses an acceleration test and equivalence estimation method of a simulation coating under marine atmospheric environment. The method comprises the following steps: sequentially performing multi-factor synergy test and salt spray test, and performing combined circulation. One test circulation cycle is 6 days, wherein one cycle of the multi-factor synergy test is 5 days and one cycle of the salt spray test is 1 day. The method is characterized in that conversion coefficients of the coating color difference or the light loss rate between the combined acceleration test in a laboratory and the marine atmospheric environment test are established, when the coating ageing mechanisms are essentially consistent under acceleration test and marine atmospheric environment, the color difference or the light loss rate during the marine atmospheric test is equivalently estimated by the acceleration test data in the laboratory under the same coating and the solar radiation, and the acceleration ratio can reach more than 8 times; the estimation result of the coating performance change is compared with the atmospheric exposure test result, and the error is less than 15%.
Description
technical field [0001] The invention relates to an accelerated test and an equivalent evaluation method for simulating a coating in a marine atmospheric environment, in particular to a multi-factor cycle combined accelerated test method for rapid evaluation of coating marine atmospheric environment adaptability and an equivalent evaluation marine Changes in coating properties in atmospheric environments. Background technique [0002] Coating is one of the most economical and effective means of anti-corrosion for metal materials and industrial products, and its aging resistance directly affects the stability of product performance. A large amount of data shows that the coating is aging due to the comprehensive influence of various environmental factors during use, especially the marine atmospheric environment with high radiation, high temperature, high humidity, and high salt spray is more likely to deteriorate the performance of the coating, resulting in Aging phenomena suc...
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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
Inventor 向江涛罗来正杨小奎肖勇
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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