Single-Layer Epoxy Anti-Corrosion Powder Coating (External Coating)
Product Introduction:
This product is formulated using epoxy resin, functional curing agents, and a meticulous design. It features high reactivity, strong adhesion, high cross-link density, and excellent resistance to chemicals, solvents, and cathodic disbondment. The coating also offers superior flexibility, impact resistance, and other performance characteristics.
Product Features:
Excellent adhesion to the substrate.
Smooth surface with high gloss.
Strong resistance to permeation and corrosion.
High surface hardness and dense coating, providing good resistance to plant root penetration.
Excellent resistance to high-temperature cathodic disbondment.
Low melting temperature, high reactivity, and high curing completion rate.
Powder Coating Performance Parameters
| Item | Quality Indicator | Test Method |
|---|---|---|
| Appearance | Uniform color, no lumps | Visual inspection |
| Color | As per customer requirements | ————— |
| Density (g/cm³) | 1.3-1.5 | GB/T 4472 |
| Non-Volatile Content (%) | ≥ 99.4 | GB/T 6554-1986 |
| Magnetic Substance Content (%) | ≤ 0.002 | GB/T 2482-1986 |
Cured Powder Coating Performance Parameters
| No. | Test Item | Technical Indicator | Test Method |
|---|---|---|---|
| 1 | Appearance | Smooth, uniform color, no bubbles, cracks, or pinholes; slight orange peel allowed | Visual inspection |
| 2 | Adhesion (Grade) | 1-3 | SY/T 0315-2005 |
| 3 | Cathodic Disbondment Resistance (24h) (mm) | ≤ 6.5 | SY/T 0315-2005 |
| Cathodic Disbondment Resistance (28d) (mm) | ≤ 8 | SY/T 0315-2005 | |
| Cross-Section Porosity | 1-4 | SY/T 0315-2005 | |
| Bonding Surface Porosity | 1-4 | SY/T 0315-2005 | |
| 4 | Flexibility (3°) | No cracks | SY/T 0315-2005 |
| Volume Resistivity | ≥ 1×10¹³ | GB/T 1410 | |
| 5 | Electrical Strength (MV/m) | ≥ 30 | GB/T 1408.1 |
| 6 | Impact Resistance (1.5J at -30°C) | No leakage | SY/T 0315-2005 |
| Chemical Resistance | Qualified | SY/T 0315-2005 | |
| 8 | Abrasion Resistance (falling sand method) | ≥ 3 | SY/T 0315-2005 |
| 9 | Salt Spray Test (1000h) | No change in coating | GB/T 1771-1991 |
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