Epoxy Anti-Corrosion Powder Coating for Coal Mine Gas Drainage Pipes
Product Introduction:
This product is formulated using phenolic epoxy resin and incorporates self-developed conductive polymers and conductive materials, combining the advantages of intrinsic and doped conductivity. It is specifically designed for conductive heavy-duty anti-corrosion powder coatings. The surface resistivity of the coating can reach below 10⁵ Ω, effectively eliminating static electricity accumulation in gas drainage pipes and preventing static sparks, thereby enhancing safety. The coating features high reactivity, strong adhesion, high cross-link density, and excellent resistance to chemicals, solvents, cathodic disbondment, as well as superior flexibility and impact resistance.
Product Features:
Excellent adhesion to the substrate.
Utilizes self-developed materials combining intrinsic and doped conductivity.
Good electrical conductivity of the coating, with surface resistivity reaching 10⁵ Ω, effectively eliminating surface charge accumulation.
Forms an anti-electric field at the coating-metal interface, shielding electron transfer and protecting the metal.
Superior high-temperature cathodic disbondment resistance.
Low melting temperature, high reactivity, high curing completion rate, and good mechanical properties.
Contains flame retardants, providing certain flame-retardant effects.
Powder Coating Performance Parameters：
| Item | Quality Indicator | Test Method |
|---|---|---|
| Appearance | Uniform color, no lumps | Visual inspection |
| Density (g/cm³) | 1.3-1.7 | GB/T 4472 |
| Non-Volatile Content (%) | ≥ 99.4 | GB/T 6554 |
Cured Powder Coating Performance Parameters：
| Test Item | Technical Indicator | Test Method |
|---|---|---|
| Appearance | Smooth surface, uniform color, no bubbles, cracks, or pinholes | Visual inspection |
| Adhesion (Grade) | 1-3 | CJ/T 120-2008 |
| Impact Resistance | No peeling, no cracking | CJ/T 120-2008 |
| Surface Resistivity (Ω·m) | ≤ 1×10⁶ (Ω·m) | GB/T 16906-97 |
| Abrasion Resistance (1000g, 1000 cycles) | ≤ 20g | GB/T 1768-1979 |
| Alcohol Burner Flame Test | Average flaming combustion time ≤ 3s | MT 181-88 |
| Maximum flaming combustion time ≤ 10s | ||
| Average non-flaming combustion time ≤ 20s | ||
| Maximum non-flaming combustion time ≤ 60s | ||
| Bending Test | No stripping or cracking of the inner coating | CJ/T 120-2008 |
| Flattening Test (Flattening ratio 4/5) | No cracking, no stripping | CJ/T 120-2008 |
Compliance Standard:
MT 181-88
Application Fields:
Special anti-static and anti-corrosion coating for gas ventilation and drainage pipes in coal mines.
Application Processes:
Electrostatic spraying, dip coating, roll coating, etc.
Precautions:
The steel pipe surface should be free of oil and moisture; the surface treatment quality should reach Sa2 1/2 level (GB/T 8923); the anchor pattern depth should be 40-90 mm; dust and abrasives on the steel pipe surface should be blown clean. Preheating temperature should be controlled between 180-250°C and must not exceed 275°C.
The product should be stored in a well-ventilated, dry indoor environment with a temperature below 30°C, away from heat sources, corrosive chemicals, and chemical solvents, and protected from strong light exposure. The stacking height should not exceed four layers. Avoid long-term pressure and ensure the packaging box is sealed to prevent caking and moisture, which can affect fluidization performance.
To ensure thorough curing of the epoxy coating and better anti-corrosion performance, it is recommended to preheat the steel pipe surface to above 200°C to improve the curing completion rate.
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