1.1 本试验方法包括测定涂层对石头或其他飞行物体造成的碎屑损伤的耐受性。 注1: 该试验方法类似于SAE J-400。 1.2 除非另有规定，否则所有尺寸均为标称尺寸。 1.3 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 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 业主认为涂层剥落是不可接受的，尤其是在汽车表面的前表面和边缘。在制定涂层或涂层系统以满足使用要求时，抗飞行物体（如砾石）的碎屑损伤是一个重要的特性，因为随着其他特性的调整，其变化很大。由于在较低温度下抗剥落性降低部分是由于灵活性降低，因此在低温下进行试验可能与使用条件更直接相关。 本试验方法旨在通过介质对涂层面板产生受控的冲击量，以提高再现性。

1.1 This test method covers the determination of the resistance of coatings to chipping damage by stones or other flying objects. Note 1: This test method is similar to SAE J-400. 1.2 All dimensions are nominal unless otherwise specified. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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 Owners consider chipping of coatings, particularly on the leading faces and edges of automobile surfaces, unacceptable. In formulating a coating or coating system to meet service requirements, the resistance to chipping damage by flying objects such as gravel is one of the properties of importance since it can vary considerably as other properties are adjusted. Since resistance to chipping decreases at lower temperatures partly as the result of decreased flexibility, the test may be more directly related to service conditions by performing it at a low temperature. This test method is designed to produce a controlled amount of impact by the media on the coated panel in order to enhance reproducibility.