Meaning and Use

4.1 The film peeling fault will occur during use. The test method provides a way to assess the degree of failure by comparing it with graphical standards.

Scope

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

1.2 Values expressed in SI units shall be considered standard. The values given in parentheses are for reference only.

1.3 This test method is similar to, but not identical to, ISO 4628 Part 5. Iso 4628 Part 5 uses a rating scale from 0 to 5, where level 0 is unchanged and level 5 is the most stringent. Test method D772 uses a rating scale from 10 to 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 This standard is not intended to address all safety issues related to use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental specifications and to determine the applicability of regulatory restrictions prior to use.

ASTM D772-2018 Standard Test Method for Evaluating the Degree of Peeling of Exterior Wall Coatings

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, Guidelines and Recommendations issued by the WTO Technical Barriers to Trade (TBT) Committee.