1.1 本规程涵盖了将粘接接头和结构直接暴露在自然大气环境中的程序。 1.2 遮蔽大气暴露程序，如史蒂文森屏幕 ( 1. ) , 2. 除了朝南和测量太阳辐射的要求外，胶接接头和试样的厚度相同。 1.3 本规程仅限于暴露样品的程序，不包括可用于评估大气暴露对这些粘合剂影响的试验- 粘结接头和结构。这些样本可以是几个品种中的任何一个。 1.3.1 完整的测试结构， 1.3.2 用于测试的结构部分， 1.3.3 一个完整的结构或截面，在其上切割的样本上进行强度观察， 1.3.4 试样本身，或 1.3.5 上述任何一种，在压力下安装。 1.4 评估暴露影响的合适试验方法包括按规定间隔对同一样本进行无损定性或定量观察，或根据试验方法等试验对单独样本集进行破坏性试验 D1002 . 注1: 见测试方法 D896 和 D897 . 1.5 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.6 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。 1.7 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 本规程中所述的大气暴露试验将仅根据特定的自然大气评估粘合剂的稳定性。由于大气条件每年变化很大，因此这些结果的再现性不如实验室老化程序得出的结果。大量研究表明，实验室人工风化试验不会与室外试验暴露始终保持良好的相关性 ( 2. , 3. , 4. ) .

1.1 This practice covers the procedure for the direct exposure of adhesive bonded joints and structures to natural atmospheric environments. 1.2 The procedure for sheltered atmospheric exposure, such as a Stevenson screen ( 1 ) , 2 of adhesive-bonded joints and specimens is the same except for the requirements of facing south and measurement of solar radiation. 1.3 This practice is limited to the procedure by which samples are exposed and does not cover the tests that may be used to evaluate the effects of atmospheric exposure on these adhesive-bonded joints and structures. These samples could be any one of several varieties. 1.3.1 A complete structure for test, 1.3.2 A section of a structure for test, 1.3.3 A complete structure or section with strength observations on specimens cut therefrom, 1.3.4 Test specimens themselves, or 1.3.5 Any of the above, mounted under stress. 1.4 Suitable test methods for evaluation of the effects of exposure include nondestructive qualitative or quantitative observations on the same sample at prescribed intervals, or destructive tests on separate sets of specimens in accordance with such tests as Test Method D1002 . Note 1: See Test Methods D896 and D897 . 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.6 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. 1.7 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 The atmospheric exposure tests described in this practice will evaluate the stability of the adhesive bond only in terms of a particular natural atmosphere. Since the atmospheric conditions vary greatly from year to year, these results will not be as reproducible as those derived from laboratory aging procedures. Considerable research has shown that laboratory artificial weathering tests will not give consistently good correlation with outdoor test exposures ( 2 , 3 , 4 ) .