GB/T 30789.9-2014 Active
GB/T 30789.9-2014 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 9:Assessment of degree of filiform corrosion
Abstract
This part of GB/T 30789 provides a method for evaluating filamentous corrosion by measuring the length L of the longest filament caused by scratches and the length M of the most frequently occurring filament.
Appendix A of this part illustrates the different grades of the length L of the longest filament and the length M of the most frequently occurring filament in filamentous corrosion with diagrams. The comparison of the test specimens with the 12 diagrams in Appendix A cannot replace the necessary numerical evaluation (Method 1 or Method 2).
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 30789.9-2014 |
| CCS | Paints, pigments, and dyes |
| ICS | Paints and varnishes |
| Implement Date | 2014-12-01 |