Dual-Layer Epoxy Anti-Corrosion Powder Coating (External Coating)
Product Introduction:
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.
Product Features:
Excellent adhesion between the base layer and the substrate, as well as between the epoxy layers.
Strong resistance to permeation and corrosion.
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.
Powder Coating Performance Parameters
| Item | Quality Indicator | Test Method |
|---|---|---|
| Appearance | Uniform color, no lumps | Visual inspection |
| Volatile Content (%) | ≤ 0.6 | Q/CNPC 38-2002 Appendix B |
| Curing Time (230°C) (min) | ≤ 3 | SY/T 0315-2005 |
| Magnetic Substance Content (%) | ≤ 0.002 | GB/T 6570 |
Cured Powder Coating Performance Parameters
| No. | Test Item | Technical Indicator | Test Method |
|---|---|---|---|
| 1 | Appearance | Smooth, uniform color, no bubbles, cracks; slight orange peel allowed | Visual inspection |
| 2 | Adhesion (Grade) (24h or 48h) | 1-2 | SY/T 0315-2005 |
| 3 | Cathodic Disbondment Resistance (24h or 48h) (mm) | ≤ 6 | SY/T 0315-2005 |
| Cathodic Disbondment Resistance (28d) (mm) | ≤ 8 | SY/T 0315-2005 | |
| Cross-Section Porosity of Base Layer | 1-4 | SY/T 0315-2005 | |
| Bonding Surface Porosity of Base Layer | 1-4 | SY/T 0315-2005 | |
| 4 | Flexibility (2°) (0° or -30°) (Ordinary Grade) | No cracks | Q/CNPC 38-2002 Appendix D |
| Flexibility (1.5°) (0° or -30°) (Enhanced Grade) | No cracks | 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 |
Compliance Standard: Q/CNPC 38-2002
Application Fields:
Complex anti-corrosion environments, especially pipelines crossing mountainous areas, rivers, and hilly regions.
Application Process:
Electrostatic spraying.
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 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.
If you're ready to take the next step or Request Free Samples, Leave your message below and we’ll reply soon. 20+ years of chemical manufacturing & export experience, a partner you can trust.
Send product request
Other supplier products
 |
filter element powder Coating | Introduction Accurate selection of powder has always been a problem for the powder industry. To solve this problem, we name the powder according t... |
 |
Server Powder Coating | Key Features & Specifications FeatureSpecification / Benefit Color Precision ΔE < 1(batch-to-batch color consistency via ... |
 |
Pure epoxy powder coating series | Introduction: Made of epoxy resin and curing agent as the main raw materials. Features: —Good adhesion, excellent mechanical properties su... |
 |
Indoor Powder Coatings | Introduction Product SegmentationApplication Fields High-Flow Flat Powder File cabinets, office furniture, etc. High-Flow High-Gl... |
 |
Amorphous aluminium silicate with a high degree of whiteness SODASIL P95 | Introduction CAS:1344-00-9 EINECS:215-684-8 Nature Amorphous aluminium and sodium silicate obtained by precipitation in an aqueous medium. Tec... |
Same products
 |
Catalytic Converter Scrap Supplier, Catalytic Converter Scrap for Sale, , Catalytic Converter Scrap, Catalytic Scrap for Sale, Catalytic Scrap Supplier, Scrap Catalytic Supplier | Seller: Trucont LLC | At Trucont LLC, we have ongoing Catalytic converter scrap available for immediate loading and shi... |
 |
Epimedium Extract | Seller: Xi'an Yuensun Biological Technology Co., Ltd. | Product Name: Epimedium ExtractLatin Name: Epimedium Sagittatum Maxim.Specification: Icariin 5%, ... |
 |
Pumpkin Powder | Seller: Xi'an Yuensun Biological Technology Co., Ltd. | Product Name: Pumpkin PowderLatin Name: Cucurbita pepo L.Used Part: FruitAppearance: yellow fine ... |
 |
Broccoli Powder | Seller: Xi'an Yuensun Biological Technology Co., Ltd. | Product Name: Broccoli powder Latin Name: Brassica oleracea L.var.italic Planch. Used Part: Who... |
 |
Pomegranate Powder | Seller: Xi'an Yuensun Biological Technology Co., Ltd. | Product Name: Pomegranate PowderLatin Name: Punica granatum linn.Used Part: Fruit juiceAppearance... |
