Surface Finish Options Overview
Product Introduction:
This product is formulated using linear phenolic epoxy resin, polyurethane-modified epoxy resin, and advanced curing agents, designed and manufactured based on a new formulation concept. It features high reactivity, strong adhesion, high cross-link density, and excellent resistance to chemicals, solvents, cathodic disbondment, as well as superior flexibility, impact resistance, and high-temperature resistance.
Product Features:
Excellent adhesion to the substrate.
Strong anti-corrosion capability.
Good leveling, high gloss, and dense coating.
Superior high-temperature cathodic disbondment resistance.
Extremely strong flexibility, capable of passing the 4/5 flattening and post-grooving tests.
Good performance in withstanding high and low temperatures.
Strong resistance to boiling water.
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 |
| Volatile Content (%) | ≤ 0.6 | GB/T 6554 |
| Curing Time (s) | 180°C ≤ 5 minutes | SY/T 0315-2005 |
| 230°C ≤ 3 minutes |
Cured Powder Coating Performance Parameters
| Test Item | Technical Indicator | Test Method |
|---|---|---|
| Appearance | Uniform color, no bubbles, cracks, or pinholes | Visual inspection |
| Adhesion (Grade) | 1-3 | CJ/T 120-2008 |
| Pinholes | No electrical spark generation | GB/T 5135.20-2010 |
| Impact Resistance | No peeling, no cracking | GB/T 5135.20-2010 |
| High-Temperature Resistance (300°C/1h) | Coating shows no detachment, bulging, cracking, peeling, or damage | GB/T 5135.20-2010 |
| Low-Temperature Resistance | Coating shows no detachment or damage, adhesion grade 1-3 | GB/T 5135.20-2010 |
| Pressure Cycling | Coating shows no detachment or damage, adhesion grade 1-3 | GB/T 5135.20-2010 |
| Temperature Cycling | Coating shows no detachment or damage, adhesion grade 1-3 | GB/T 5135.20-2010 |
| Boiling Water Aging | Coating shows no detachment or damage | GB/T 5135.20-2010 |
| Vacuum Resistance | Coating shows no detachment | GB/T 5135.20-2010 |
| Flexibility | Coating shows no detachment or cracking | GB/T 5135.20-2010 |
| Flattening Test | Coating shows no peeling or cracking | GB/T 5135.20-2010 |
Compliance Standards: GB/T 5135.20-2010; CJ/T 120-2008
Application Fields:
Anti-corrosion coating for internal and external surfaces of water supply pipes used in firefighting.
Application Processes:
Spraying, dip 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 50-90 mm; dust and abrasives on the steel pipe surface should be blown clean. Preheating temperature should be controlled between 180-240°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.
