The 3-Layer Polyethylene (FPE) Anti-Corrosion Epoxy Powder Coating is engineered for long-term corrosion protection of oil and gas pipelines. You can apply this coating using electrostatic spraying techniques to create a three-layer system where the epoxy base layer and intermediate adhesive layer form a cohesive unit with the outer polyethylene layer.
This system provides excellent adhesion, high cross-link density, chemical resistance, impact resistance, and superior high-temperature cathodic disbondment resistance, ensuring pipeline integrity in extreme environmental conditions.
You can use 3-Layer Polyethylene Anti-Corrosion Powder Coating for pipelines and metal structures exposed to demanding environments. Typical applications include:
| Industry / Field | Typical Products / Parts | Benefits |
|---|---|---|
| Oil & Gas Pipelines | Buried steel pipelines, cross-country pipelines | Long-term corrosion resistance, high adhesion, chemical and mechanical durability |
| Industrial Pipelines | Chemical and process pipelines | Excellent chemical resistance and impact protection |
| Infrastructure & Utilities | Water, gas, and district heating pipelines | Maintains coating integrity under wide temperature ranges and soil conditions |
Applicable Equipment: Frictional charging spray, corona electrostatic spray
Recommended Film Thickness: 120–150 μm (adjustable according to workpiece requirements)
The coating is formulated to meet internationally recognized anti-corrosion and coating performance standards:
ISO 21809-3 – Polyethylene coatings for buried steel pipelines
ISO 2409 – Cross-cut adhesion test
ISO 4624 – Pull-off adhesion test
ISO 17872 – Cathodic disbondment resistance
ISO 1519 / ISO 1520 – Flexibility and cupping test
ISO 6272 – Impact resistance of coatings
ISO 4628 – Evaluation of visual defects
ASTM D3363 – Pencil hardness
RoHS Directive – Restriction of hazardous substances
These standards ensure long-term mechanical, chemical, and corrosion protection performance.
| Item | Specification | Test Method / Standard |
|---|---|---|
| Product Type | 3-Layer Polyethylene (FPE) Anti-Corrosion Epoxy Powder Coating | — |
| Appearance | Uniform color, no lumps | Visual inspection |
| Color | Customizable | Colorimeter & visual inspection |
| Density (g/cm³) | 1.4–1.6 | ISO 2811-1 |
| Particle Size Distribution | ≤3% residuals at 150 μm, ≤0.2% at 250 μm | ISO 13320 |
| Volatile Content (%) | ≤0.6 | ISO 3251 |
| Gelation Time at 200°C | ≥12 s | ISO 8130-6 |
| Curing Time at 200°C | ≤3 min | ISO 8130-6 Appendix A |
| Adhesion | Grade ≤2 | ISO 2409 |
| Cathodic Disbondment Resistance | 48h at 5°C ≤8 mm; 30±5°C ≤15 mm | ISO 17872 |
| Bending Resistance | -20°C, 2.5° | No cracks (ISO 1519 / ISO 1520) |
| Surface Hardness | High | ASTM D3363 |
Excellent Adhesion and Cohesion
You benefit from strong bonding between the substrate, base layer, intermediate adhesive, and outer polyethylene layer.
Superior Corrosion Protection
High chemical and cathodic disbondment resistance ensures long-term pipeline durability.
Mechanical and Thermal Stability
Resistant to impact, bending, and a wide range of temperatures for reliable performance in buried and above-ground pipelines.
Efficient Application
High transfer efficiency and coverage area reduce waste and improve coating consistency.
Customizable Color and Finish
You can adjust color according to project specifications while maintaining functional performance.
| Item | Specification |
|---|---|
| Standard Packaging | 20 kg paper box with inner plastic liner |
| Storage Conditions | Dry, ventilated area below 30°C; avoid heat sources, chemical exposure, and strong light |
| Handling | Maximum stack height 5 layers; keep packaging sealed to prevent moisture and caking |
| Shelf Life | Maintain in original packaging until use to preserve powder fluidization and performance |
1. What substrates can this coating be applied to?
You can apply it to steel pipelines and metal structures requiring anti-corrosion protection in buried or extreme environments.
2. How does the 3-layer system improve performance?
The epoxy base layer ensures adhesion and corrosion resistance, the intermediate adhesive layer bonds the layers cohesively, and the polyethylene outer layer provides chemical, impact, and environmental protection.
3. What is the recommended film thickness for effective protection?
You should apply 120–150 μm, adjustable based on pipeline requirements and environmental exposure.
4. How resistant is this coating to high-temperature cathodic disbondment?
It exhibits excellent resistance, maintaining coating adhesion and integrity under prolonged high-temperature stress, consistent with ISO 17872 testing.
5. Can this coating be applied in outdoor conditions?
Outdoor application is not recommended for long-term aesthetic performance, as UV exposure may lead to fading or chalking.
Powder coatings can be categorized by resin system (epoxy, polyester, hybrid, polyurethane), appearance (smooth, texture, hammer, metallic, pearlescent), or performance level (anti-corrosion, heat-resistant, UV-resistant, architectural grade, automotive grade).
Powder coatings offer thousands of colors in gloss, matte, satin, metallic, candy, texture, wrinkle, hammer tone, wood grain, fluorescent, and other custom effects. Special powders can create soft-touch, anti-scratch, anti-fingerprint, or anti-graffiti surfaces.
The process generally includes surface pretreatment (degreasing, phosphating, chromating, sandblasting), drying, electrostatic spraying, curing in an oven, and cooling. A well-controlled pretreatment and curing process ensures strong adhesion and long service life.
Powder coatings are environmentally friendly, solvent-free, and produce minimal waste. They offer excellent corrosion resistance, weather durability, mechanical strength, and uniform film appearance. The coating is tough, impact-resistant, scratch-resistant, and has a long lifespan.
Powder coatings are widely used in appliances, aluminum profiles, architectural components, automotive parts, bicycles, furniture, outdoor equipment, machinery, electrical cabinets, pipeline systems, and general industrial and consumer goods.
Powder coating is a dry finishing technology where finely ground powder is electrostatically sprayed onto a metal or non-metal surface and then cured at high temperature. After curing, the powder melts into a continuous, durable, and decorative coating layer.
Powder coating protects the substrate from corrosion, weathering, chemical attack, and mechanical wear. It also provides decorative appearance with rich colors, gloss levels, textures, and special effects.
In many industrial applications, powder coating outperforms liquid paint. It forms a thicker and tougher coating, resists corrosion and chemicals better, and does not contain VOCs. It also provides excellent consistency and cost-effective mass production.
It is called powder coating because the coating material is a solid powder instead of a liquid paint. The coating is formed by melting and curing powder particles under heat.
Powder coatings include several families depending on resin chemistry:
• Epoxy powders
• Polyester powders
• Epoxy-polyester hybrid powders
• Polyurethane powders
• Acrylic powders
• Fluorocarbon (PVDF) powders
Each type has its own performance features such as corrosion resistance, UV resistance, chemical resistance, outdoor durability, or decorative properties.
Powder coatings are based on thermoset or thermoplastic resins combined with pigments, curing agents, fillers, additives, and in some cases metallic or effect particles. Common substrates include steel, aluminum, galvanized metal, MDF, and certain heat-resistant plastics.
The lifespan depends on powder type, film thickness, application method, pretreatment, and service environment. Indoor coatings can last more than 10–20 years. High-grade outdoor polyester or fluorocarbon powders can last 15–25 years or longer under UV exposure.
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