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No. | Test item | Technical indicators | Test method |
1 | Appearance of original paint | Uniform and no impurities | Visual inspection |
2 | Paint film appearance | Flat, smooth and no shrinkage | GB 1729-79 |
3 | Viscosity (Tu-4 cup, s) | ≥40 | GB/T 1723-93 |
4 | Non-volatilization component, % | ≥50 | GB 1725-79 |
5 | Curing requirement | 130ºC×30min | GB 1728-79 |
6 | Hardness, H | ≥1 | GB 6739-86 |
7 | Impact strength, kg×cm | 50 | GB/T 1732-93 |
8 | Adhesion, (1mm,grade) | 0-1 | GB 9286-88 |
9 | Bending,mm | ≤1 | GB/T 1731-93 |
10 | Salt fog resistance | No obvious change in 24h | GB/T 1771-91 |