1.1 本规程涵盖了汽车涂料的车辆使用暴露试验规程。这种暴露测试对于验证汽车涂料的性能以及与实验室测试数据的相关性是有价值的。车辆服务暴露旨在提供与车辆操作相关的应力因素的短期（2至20周）暴露。包括划痕、破损、撞击、碎石、昆虫撞击、鸟类坠落、树液和染色、环境沉降等因素。 注1: 车辆维修暴露并非旨在提供表征风化或腐蚀暴露的长期影响所需的条件。 1.2 暴露条件是通过在穿过规定道路路线的汽车测试车队上放置多个汽车面漆测试板而产生的。暴露在操作环境中的时间可以是20小时/天，7天/周，允许累积超过100 000英里。 1.3 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。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 由于汽车涂料暴露于实际操作中遇到的各种机械和化学应力是非常偶然的，因此需要严格关注实验设计和暴露条件，才能获得可得出有效结论的具有统计意义的数据。

1.1 This practice covers the protocol for vehicle service exposure testing of automotive coatings. Such exposure testing is valuable for the verification of the performance of automotive coatings and correlation with laboratory test data. Vehicle service exposure is intended to provide short term (2 to 20 weeks) exposure to the stress factors associated with vehicle operation. Factors included are scratch, mar, impact, stone chipping, insect impact, bird dropping, tree sap and staining, environmental fallout, etc. Note 1: Vehicle service exposure is not intended to provide the conditions that are needed for characterizing the long term effects of weathering or corrosion exposure. 1.2 The exposure conditions are produced by the placement of multiple test panels of automotive finishes on automotive test fleets that traverse a defined road course. Exposure to the operating environment can be 20 h/day, 7 days/week allowing for accumulation of over 100 000 miles in 10 weeks of exposure. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 Since the exposure of automotive coatings to the various mechanical and chemical stresses encountered in actual operations, is very opportunistic, obtaining statistically significant data from which valid conclusions can be drawn, requires rigorous attention to the experimental designs and conditions of exposure.