Surface Finish Options Overview
Product Introduction:
This product is carefully formulated using epoxy resin and functional curing agents. It features high reactivity, strong adhesion, high cross-link density, and excellent resistance to chemicals, solvents, cathodic disbondment, as well as superior flexibility and impact resistance.
Product Usage:
Suitable for anti-corrosion of oil and gas transmission pipelines, municipal water supply, drainage, sewage, circulating water, chemical industry, and can also serve as a base layer for anti-corrosion in thermal insulation and submarine cable applications.
Product Features:
Excellent adhesion to the substrate.Good leveling of the coating surface with moderate gloss.Strong resistance to permeation and corrosion.High surface hardness and dense coating, good resistance to plant root penetration.Excellent high-temperature cathodic disbondment resistance.Low melting temperature, high reactivity, high curing completion rate.Powder Performance:
Powder Coating Performance Parameters
| Test Item | Technical Specification | Remarks |
|---|---|---|
| Appearance | Uniform color, no lumps | Visual inspection |
| Color | As per customer requirements | Color difference meter |
| Density (g/cm³) | 1.3–1.5 | GB/T 4472 |
| Particle Size Distribution | Residuals ≤3.0 at 150um, ≤0.2 at 250um | GB/T 6554 |
| Non-volatile Content (%) | ≤99.4 | GB/T 6554-1986 |
| Magnetic Substance Content (%) | ≤0.002 | GB/T 2482-1986 |
| Gellation Time at 180°C (s) | ≤100s | GB/T 6554-1986 |
| Gellation Time at 200°C (s) | ≤60s | GB/T 6554-1986 |
| Gellation Time at 230°C (s) | ≤30s | GB/T 6554-1986 |
Cured Powder Coating Performance Parameters
| Test Item | Technical Specification | Remarks |
|---|---|---|
| Appearance | Smooth, uniform color, no bubbles, no cracks, allows slight orange peel | Visual inspection |
| Adhesion (Grade) | 1-3 | SY/T 0315-2005 |
| Negative Electrode at 24h (mm) | ≤6.5 | SY/T 0315-2005 |
| Negative Electrode at 28d (mm) | ≤8 | SY/T 0315-2005 |
| Cross-sectional Crack Rate | 1-4 | SY/T 0315-2005 |
| Coating Surface Porosity Rate | 1-4 | SY/T 0315-2005 |
| Bending Resistance (3°) | No cracks | SY/T 0315-2005 |
| Volume Resistivity | ≤1*10¹³ | GB/T 1410 |
| Electric Strength (MV/m) | ≥30 | GB/T 1408.1 |
| Impact Resistance (1.5J at -30°) | No leakage points | SY/T 0315-2005 |
| Chemical Resistance | Qualified | SY/T 0315-2005 |
| Wear Resistance (Abrasion Method) | ≤3 | SY/T 0315-2005 |
| Salt Spray Test (1000h) | Coating shows no change | GB/T 1771-1991 |
Execution Standard:
SY/T 0315-2005 “Technical Specification for Single Layer Fusion Bonded Epoxy Powder Coating on Steel Pipes”
Curing Conditions:
| Property | Specification | Remarks |
|---|---|---|
| Temperature | 200-230°C for 3-1.5 minutes | Medium-frequency heating recommended |
Application Parameters:
| Parameter | Specification | Notes |
|---|---|---|
| Applicable Equipment | Frictional charging spray, corona electrostatic spray | |
| Film Thickness | 250-450um | Adjustable according to workpiece requirements |
Storage Period:
The product can be stored for 6 months in dry conditions below 30°C.The used coating must be re-sealed immediately to prevent moisture absorption affecting performance.Packaging: 20kg paper boxes lined with plastic bags.Health and Safety:
The product is non-toxic and non-flammable, but follow GB15607-1995 coating operation safety regulations when using.Precautions:
Do not mix different types of powders.Not recommended for outdoor use; fading and chalking may occur with long-term outdoor exposure.The steel pipe surface should be free of oil and moisture, with surface treatment quality reaching Sa21/2 level (GB/T8923), anchor pattern depth should be 40-100um, and the surface should be cleaned of dust and abrasives.Preheating: The temperature should be controlled between 180-230°C.
