采用汽车行业内常用的光老化试验方法，主要针对汽车仪表板材料和汽车保险杠材料，展开了光老化研究，一方面比较了常用的光老化试验方法对汽车零部件材料老化严酷程度的影响，另一方面对比了不同零部件材料的耐光老化性能。研究结果显示，对于仪表板材料的光老化行为，3 种常用试验方法的老化严酷程度基本表现为方法二＞方法三＞方法一，仪表板材料A和材料B的耐老化性能基本一致；对于保险杠材料的光老化行为，3 种常用试验方法的老化严酷程度基本表现为方法四＞方法六＞方法五，保险杠材料D的耐光老化性能优于材料C。

The light-aging test method commonly used in the automobile industry is utilized to carry out light- aging research on automotive instrument panel（IP）materials and bumper materials. On one hand，the impacts of common light-aging test methods on aging degree of automotive component materials are compared；on the other hand，the light-aging resistances of different component materials are compared. The results show that，for light-aging behavior of IP materials，the aging degree of the third test method is not severer than that of the second method，but it is severer than that of the first method. The light-aging resistance of IP material A is almost the same as that of IP material B. With reference to light-aging behavior of bumper materials，the aging degree of three common test methods indicates that the aging degree of the sixth test method is not severer than that of the fourth method，but it is severer than that of the fifth method. The light- aging resistance of bumper material D is superior to that of bumper material C.