1.1 本规程涵盖了使用荧光紫外线（见方法A）或氙弧光源（见方法B）对至少具有一种玻璃或透明被粘物的粘接接头进行紫外线（UV）光老化（有水或无水）的基本原理和操作程序。 1.2 本规程仅限于获取、测量和控制老化条件的仪器以及暴露程序。其他ASTM试验方法或规范中描述了样品制备、强度、试验条件和结果评估。 1.3 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本规程用于在受控但人为的条件下确定紫外线或紫外线和水对粘接接头的影响。本规程的结果可用于比较几种粘合剂在特定实验室紫外线照射下的相对耐久性。 4.2 本规程不用于确定使用中粘合剂寿命的预测。它仅用于确定不同粘合剂之间的相对耐久性。 4.3 由于灯具的光谱辐照度不同，不同光源（氙弧或荧光紫外线）的结果可能不同。不应根据粘合剂在不同类型光源下的性能相互比较。 4.4 当操作条件在给定方法的限制范围内变化时，获得的结果可能会有所不同。当对不同制造商制造的仪器进行暴露时，结果也可能不同。只有在同一仪器中同时测试材料时，才能对材料进行比较。确保准确报告操作条件。 4.5 所用透明粘附物的类型和紫外线透射率特性可对所测试粘合剂的降解速率和类型产生显著影响。只有在具有相同紫外线透射率的相同类型（最好是相同批次）的透明粘附物上进行测试时，才能对粘合剂进行比较。 4.6 本规程不用于确定大气污染物、生物有机体、盐或冻融循环的影响。

1.1 This practice covers the basic principles and operating procedures for ultraviolet (UV) light aging (with or without water) of adhesive bonded joints having at least one glass or transparent adherend, using fluorescent UV (see Method A) or xenon-arc light sources (see Method B). 1.2 This practice is limited to the apparatus for obtaining, measuring, and controlling the aging conditions, and to the procedures for exposure. Sample preparation, strength, test conditions, and evaluation of the results are described in other ASTM test methods or specifications. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This practice is for determining the effects of UV light, or UV light and water, on adhesive bonded joints under controlled but artificial conditions. The results of this practice can be used for comparing the relative durability of several adhesives in a specific laboratory UV exposure. 4.2 This practice is not for determining a forecast of the life of an adhesive bond in service. It is only for determining the relative durability of different adhesives compared to each other. 4.3 The results obtained may vary between the different light sources (xenon-arc or fluorescent UV), because of the different spectral-irradiance of the lamps. Adhesives should not be compared to each other based on their performance under different types of light sources. 4.4 The results obtained may vary when operation conditions are varied within the limits of a given method. The results may also vary when exposures are performed on instruments made by different manufacturers. Comparisons between materials must only be made when they are tested at the same time in the same instrument. Be sure to accurately report the operating conditions. 4.5 The type and UV transmittance characteristics of the transparent adherend used can have a significant effect on the rate and type of degradation of the adhesives being tested. Comparisons between adhesives must only be made when tested on transparent adherends of the same type (preferably the same lot) with the same UV transmission. 4.6 This practice is not for determining the effects of atmospheric pollutants, biological organisms, salt, or freeze/thaw cycles.