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| The Correlation of Areas for Natural Weathering Exposure of Automotive Materials |
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| DOI：10.7643/issn.1672-9242.2022.07.018 |
| KeyWord:automotive materials natural weathering exposure experiment aging yellowing degree Spearman's rank correlation coefficient correlation severity |
| Author | Institution |
| DU Yan-wen |
Key Point Shanghai Inc., Shanghai , China |
| LIU Dan |
Pan Asia Technical Automotive Center Co., Ltd., Shanghai , China |
| ZHANG Xiao-lue |
Pan Asia Technical Automotive Center Co., Ltd., Shanghai , China |
| GAO Jia-yi |
Donghua University, Shanghai , China |
| ZHANG Heng |
Q-Lab China, Shanghai , China |
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| Abstract: |
| The outward appearance, physical and chemical properties of automotive materials will change during the production, machining, storage and the application, which is the aging process of polymer materials. Three polymer materials and three automotive materials were exposed in two typical humid and hot environments, one is Qionghai (China) and the other is Florida (USA), for natural weathering exposure test. The yellowing degree and the aging phenomenon of the materials during the exposure were evaluated at set intervals. The Spearman's rank correlation coefficient was used to study the correlation of the two said regions which have similar environments, and the difference in environmental severity of these two regions was compared by characterizing the aging degree of the same material in different testing grounds. The results are listed as follows, in terms of the yellowing degree of materials, these two regions have a good correlation, and the environmental severity ratio is about Qionghai:Florida=1:1.19. |
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