意义和用途

4.1 使用过程中会出现薄膜剥落的故障. The test method provides a way to assess the degree of failure by comparing it with graphical standards.

范围

1.1 The test method includes the evaluation of the degree of peeling (脱皮) of exterior wall coatings by comparison with photographic standards.

1.2 以 SI 单位表示的值应被视为标准值. 括号内的数值仅供参考.

1.3 This test method is similar to, but not identical to, 国际标准化组织 4628 部分 5. 伊索 4628 部分 5 uses a rating scale from 0 到 5, where level 0 is unchanged and level 5 is the most stringent. Test method D772 uses a rating scale from 10 到 0, where level 10 is unchanged and level 0 is the most severe. The two criteria use different picture reference photographs to determine the rank values.

1.4 本标准并非旨在解决与使用相关的所有安全问题. 本标准的使用者有责任建立适当的安全机制, 健康和环境规范，并在使用前确定监管限制的适用性.

ASTM D772-2018 评价外墙涂料剥落程度的标准测试方法

1.5 This international standard has been developed in accordance with the internationally recognized standardization principles established in the Decision on the Principles for the Development of International Standards, 世贸组织发布的技术性贸易壁垒指南和建议 (技术性贸易壁垒) 委员会.