GB/T 30786-2014 "Paints and varnishes - Guidelines for scribing coated metal panels for corrosion tests" is applicable to the pretreatment of various coated metal panels for corrosion testing. The standard specifies core requirements, including specimen preparation, scribing tools, operational procedures, and quality inspection. It recommends the use of dedicated scribers made of carbon steel, tungsten carbide, or tungsten steel, and defines critical parameters such as blade hardness and angle. After scribing, instruments such as coating thickness gauges and microscopes must be used to inspect the depth and integrity of the scribe, ensuring that the scratch penetrates the coating without excessively damaging the substrate. This provides a standardized defect initiation point for subsequent corrosion tests, ensuring the accuracy and comparability of test results.
| Status | Active | ||
|---|---|---|---|
| CCS | G50 | ICS | 87.040 |
| Release Date | 2014-07-08 00:00:00 | Implementation Date | 2014-12-01 00:00:00 |
