GB/T 30789.1-2015 "Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects, and of intensity of uniform changes in appearance—Part 1: General principles and rating system" is applicable to the assessment and designation of various defects after coating aging. It specifies general principles and a unified rating system. After completing the coating aging treatment using an aging test chamber, magnifying glasses and stereomicroscopes are used to observe defect characteristics. Defects are classified and designated based on dimensions such as defect type, quantity, and size. The standard clarifies the assessment environment and observation requirements, providing a foundational framework for subsequent specialized evaluations of specific defects.
| Status | Active | ||
|---|---|---|---|
| CCS | G50 | ICS | 87.040 |
| Release Date | 2015-06-02 00:00:00 | Implementation Date | 2016-01-01 00:00:00 |
