Introducción del producto:
This dual-layer epoxy powder coating is formulated using multiple types of epoxy resins and functional curing agents. The base layer, like other epoxy anti-corrosion coatings, offers excellent corrosion resistance. The outer layer not only maintains corrosion protection but also enhances the protective properties, making it suitable for highly demanding anti-corrosion environments, especially for pipelines crossing mountainous areas, rivers, and hilly regions.
Características del producto:
Excellent adhesion between the base layer and the substrate, as well as between the epoxy layers.
Gran resistencia a la permeación y a la corrosión.
The outer layer has high hardness and density, is scratch-resistant, and provides good resistance to plant root penetration.
The coating has excellent resistance to high-temperature cathodic disbondment.
Parámetros de rendimiento del recubrimiento en polvo
| Asunto | Indicador de calidad | Método de prueba |
|---|---|---|
| Apariencia | Color uniforme, sin grumos | Inspección visual |
| Contenido volátil (%) | ≤ 0.6 | Q/CNPC 38-2002 Apéndice B |
| Curing Time (230°C) (min) | ≤ 3 | SY/T0315-2005 |
| Contenido de sustancia magnética (%) | ≤ 0.002 | GB/T6570 |
Parámetros de rendimiento del recubrimiento en polvo curado
| No. | Elemento de prueba | Indicador tecnico | Método de prueba |
|---|---|---|---|
| 1 | Apariencia | Smooth, uniform color, no bubbles, cracks; slight orange peel allowed | Inspección visual |
| 2 | Adhesion (Grade) (24h or 48h) | 1 - 2 | SY/T0315-2005 |
| 3 | Cathodic Disbondment Resistance (24h or 48h) (mm) | ≤ 6 | SY/T0315-2005 |
| Cathodic Disbondment Resistance (28d) (mm) | ≤ 8 | SY/T0315-2005 | |
| Cross-Section Porosity of Base Layer | 1 - 4 | SY/T0315-2005 | |
| Bonding Surface Porosity of Base Layer | 1 - 4 | SY/T0315-2005 | |
| 4 | Flexibility (2°) (0° or -30°) (Ordinary Grade) | Sin grietas | Q/CNPC 38-2002 Appendix D |
| Flexibility (1.5°) (0° or -30°) (Enhanced Grade) | Sin grietas | Q/CNPC 38-2002 Appendix D | |
| Impact Resistance (10J) (Ordinary Grade) | No pinholes | Q/CNPC 38-2002 Appendix E | |
| Impact Resistance (15J) (Enhanced Grade) | No pinholes | Q/CNPC 38-2002 Appendix E | |
| Scratch Resistance (30Kg) (Ordinary Grade) | Scratch depth ≤ 350 µm, no leakage | Q/CNPC 38-2002 Appendix F | |
| 8 | Scratch Resistance (50Kg) (Enhanced Grade) | Scratch depth ≤ 500 µm, no leakage | Q/CNPC 38-2002 Appendix F |
Estándar de cumplimiento: Q/CNPC 38-2002
Los campos de aplicación:
Complex anti-corrosion environments, especially pipelines crossing mountainous areas, rivers, and hilly regions.
Proceso de Solicitud:
Pulverización electrostática.
Precauciones:
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 50-90 mm; dust and abrasives on the steel pipe surface should be blown clean.
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, ensure the packaging box is sealed to prevent caking and moisture, which can affect fluidization performance.
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