1.1 本试验方法包括通过与照相标准进行比较来评估外部油漆的剥落（结垢）程度。 1.2 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。 1.3 该试验方法与ISO 4628第5部分相似，但不完全相同。ISO 4628第5部分使用0到5的等级，其中0的等级没有变化，5的等级是最严重的。试验方法 D772 使用10到0的等级，其中10的等级没有变化，0的等级是最严重的。这两个标准使用不同的图片参考照片来确定评级值。 1.4 本标准并不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 漆膜在使用过程中可能会出现剥落故障。该试验方法提供了一种通过与图示标准进行比较来评估失效程度的方法。

1.1 This test method covers the evaluation of the degree of flaking (scaling) of exterior paints by comparison with photographic standards. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This test method is similar though not identical to ISO 4628 Part 5. ISO 4628 Part 5 uses a 0 to 5 rating scale, where a rating of 0 is no change and a rating of 5 is most severe. Test Method D772 uses a 10 to 0 rating scale, where a rating of 10 is no change and a rating of 0 is most severe. The two standards use different pictorial reference photographs for determining the rating values. 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 Flaking failure of paint films can occur in use. This test method provides a means of evaluating the degree of failure by comparing to pictorial standards.