Internal Pipeline Epoxy Anticorrosion Powder Coating
We are a manufacturer based in China. We specialize in providing high-quality Internal Pipeline Epoxy Anticorrosion Powder Coating for industrial clients across various sectors. Whether you need chemicals consultation or technical support, our team is here to help.
Category：Application industries, powder Coating Own Brand：MT /MOQ:100KG /From China/ B2B only.
Introduction
1. Product Overview
This product is carefully formulated using epoxy resin and functional curing agents. It features high reactivity, strong adhesion, and high cross-linking density. The cured coating film exhibits outstanding properties, including excellent chemical resistance, solvent resistance, cathodic disbondment resistance, flexibility, and impact resistance, providing reliable long-term corrosion protection for internal pipeline surfaces.
2. Product Features
(1) Excellent bonding strength with the substrate.
(2) Outstanding leveling performance and high gloss of the coating surface.
(3) Strong resistance to penetration and excellent vibration resistance.
(4) High surface hardness and dense coating structure.
(5) Excellent resistance to high-temperature cathodic corrosion.
(6) Low melting temperature, high reaction activity, and high curing completion rate.
(7) Excellent mechanical properties and outstanding flexibility.
3. Powder Coating Performance Parameters
| Item | Quality Requirements | Test Method |
|---|---|---|
| Appearance | Uniform color, no agglomeration | Visual inspection |
| Color | According to customer requirements | — |
| Density (g/cm³) | 1.3–1.5 | GB/T 4472 |
| Particle Size Distribution (%) | Powder retained on 150 μm sieve ≤3 | GB/T 6554-1986 |
| Powder retained on 250 μm sieve ≤0.2 | GB/T 6554-1986 | |
| Non-volatile Content (%) | ≥99.4 | GB/T 6554-1986 |
| Gel Time (s) | ≤180 s (180°C) | GB/T 6554-1986 |
| ≤120 s (200°C) | GB/T 6554-1986 | |
| ≤60 s (230°C) | GB/T 6554-1986 | |
| Magnetic Material Content (%) | ≤0.002 | GB/T 2482-1986 |
| Horizontal Flow (mm) | 22–28 | GB/T 6554-1986 |
4. Performance Parameters of Cured Powder Coating Film
| No. | Test Item | Technical Requirements | Test Method |
|---|---|---|---|
| 1 | Appearance | Smooth surface, uniform color, no pinholes, peeling, or phase separation; excellent internal and external bonding performance | Visual inspection |
| 2 | Adhesion (Grade) | 1–3 | SY/T 0442-1997 |
| 3 | Cathodic Corrosion Resistance (65°C, 48 h) (mm) | <8 | SY/T 0413-95 |
| 4 | Flexural Resistance (40) | No cracks | SY/T 0442-1997 |
| 5 | Dielectric Strength (MV/m) | ≥30 | GB/T 1408-1989 |
| 6 | Impact Strength | ≥11 | SY/T 0442-1997 |
| 7 | Chemical Medium Corrosion Resistance | Qualified | GB/T 1763-1979 / GB/T 1733-1993 |
| 10% HCl, room temperature, 90 days | |||
| 10% H₂SO₄, room temperature, 90 days | |||
| 3.5% NaCl, room temperature, 90 days | |||
| 10% NaOH, room temperature, 90 days | |||
| Oilfield wastewater, 80°C, 90 days | |||
| Crude oil, 80°C, 90 days | |||
| Gasoline, room temperature, 90 days | |||
| Diesel, room temperature, 90 days | |||
| Kerosene, room temperature, 90 days | |||
| 8 | Abrasion Resistance (1000 g, 1000 cycles) (mg) | ≤20 | GB/T 1768-1979 |
| 9 | Salt Spray Resistance (1000 h) | No change in coating film | GB/T 1771-1991 |
| 10 | Flattening Test (Flattening Ratio 4/5) | No cracking | CJ/T 120-2008 |
Applicable Standard: SY/T 0442-97
5. Precautions
(1) The steel pipe surface must be free from oil contamination and moisture. Surface preparation quality should reach Sa2½ grade (GB/T 8923). The recommended anchor profile depth is 50–90 μm. Dust and abrasive residues attached to the steel surface should be completely removed by air blowing. The preheating temperature should be controlled at 180–230°C.
(2) The product should be stored indoors in a well-ventilated and dry environment at temperatures below 30°C, away from heat sources, corrosive chemicals, and chemical solvents. Avoid direct exposure to strong sunlight. The maximum stacking height should not exceed 4 layers. Avoid prolonged compression and ensure packaging remains sealed to prevent powder caking and moisture absorption, which may affect fluidization performance.
(3) To ensure complete curing of the epoxy coating film and achieve optimal anticorrosion performance, it is recommended that the steel pipe surface temperature be preheated to above 170°C, which can significantly improve the curing completion rate.
6. Applicable Application Processes
Suitable for:
- Electrostatic spraying
- Suction coating
- Dip coating
- Roller coating
7. Application Areas
- Widely used for internal corrosion protection of pipelines in industries including:
- Municipal engineering pipelines
- Water supply pipelines
- Drainage pipelines
- Sewage pipelines
- Circulating water pipelines
- Chemical industry pipelines
- Thermal power plant pipelines
- Other fluid transportation pipeline systems.
If you're ready to take the next step, Leave your message below and we’ll reply soon. 20+ years of chemical manufacturing & export experience, a partner you can trust.
Inquiry
Factory & Certification
