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| Correlation between Outdoor Exposure Test and Laboratory Comprehensive Accelerated Test of Epoxy Micaceous Iron/Acrylic Coating |
| Received:May 15, 2023 Revised:June 29, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.11.018 |
| KeyWord:epoxy micaceous iron/acrylic coating outdoor exposure test comprehensive accelerated test correlation color difference loss of light rate electrochemical impedance |
| Author | Institution |
| LI Di-fan |
Southwest Institute of Technology and Engineering, Chongqing , China |
| XIANG Jiang-tao |
Southwest Institute of Technology and Engineering, Chongqing , China |
| LONG Shi-teng |
Southwest Institute of Technology and Engineering, Chongqing , China;Hainan Wanning National Observation and Research Station for Corrosion of Materials in Atmospheric Environment, Hainan Wanning , China |
| WANG Xiao-hui |
Southwest Institute of Technology and Engineering, Chongqing , China |
| CHEN Yuan |
Southwest Institute of Technology and Engineering, Chongqing , China |
| LI Jing-yu |
Southwest Institute of Technology and Engineering, Chongqing , China |
| LI Hong-fei |
Southwest Institute of Technology and Engineering, Chongqing , China |
| CHEN Xing-hao |
Southwest Institute of Technology and Engineering, Chongqing , China |
| LIU Qun |
Southwest Institute of Technology and Engineering, Chongqing , China |
| YANG Hao-yu |
Southwest Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| The work aims to study the correlation of organic coatings under the conditions of outdoor exposure test at Lhasa Test Station and multi-factor comprehensive plateau cold climate environment simulation accelerated test.Taking the epoxy micaceous iron/acrylic coating as the research object, through the outdoor exposure test and the laboratory comprehensive simulation accelerated test, analysis devices such as the glossmeter and colorimeter were used to obtain the change rules of color difference and loss of light to characterize the aging performance of the coating, and the aging degree of the coating system under the two test conditions was compared; ATR-FTIR, EIS and other methods were used to study the effect of the change of the molecular structure of the coating and different environmental conditions on the corrosion resistance of the coating, and the degradation mechanism of the coating was analyzed; The correlation of the coating system in two environments was calculated by the Spearman rank correlation coefficient (rhos) method.Compared with the outdoor exposure test for 12 months, the color difference and light loss rate of the epoxy micaceous iron/acrylic coating were basically the same after the comprehensive simulated accelerated test for 60 days. The correlation between the color difference and the light loss rate was 0.771 4 and 0.828 6. Compared with the outdoor exposure test at Lhasa Test Station, the change trend of key performance parameters such as color difference, loss of light, infrared spectrum, electrochemical impedance, etc. of the epoxy micaceous iron/acrylic coating system after the comprehensive accelerated test is basically the same, and the aging mechanism is basically the same. The multi-factor comprehensive plateau cold climate environment simulation accelerated test device can comprehensively simulate the environmental factors such as solar radiation, air pressure, temperature and humidity under the plateau cold climate environment. It has good simulation and correlation. |
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