The GB/T 30789.7-2015 standard provides a swan flannel method for evaluating the coating chalking grade, which is particularly suitable for the evaluation of rough surfaces and multi-coating systems. By using the swan flannel method, the chalking degree of coatings under natural or artificial accelerated aging conditions can be effectively evaluated. This method is not affected by the surface structure of substrates with large surface roughness, such as fiber cement board and concrete. The method specified in the standard is suitable for laboratory and field evaluation, providing a reliable basis for the durability evaluation of coatings.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | G50 | ICS | 87.040 |
| Release Date | 2015-05-15 00:00:00 | Implementation Date | 2015-10-01 00:00:00 |