powder Coating

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:

1. Excellent adhesion to the substrate.
2. Good leveling of the coating surface with moderate gloss.
3. Strong resistance to permeation and corrosion.
4. High surface hardness and dense coating, good resistance to plant root penetration.
5. Excellent high-temperature cathodic disbondment resistance.
6. 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:

1. The product can be stored for 6 months in dry conditions below 30°C.
2. The used coating must be re-sealed immediately to prevent moisture absorption affecting performance.
3. Packaging: 20kg paper boxes lined with plastic bags.

Health and Safety:

1. The product is non-toxic and non-flammable, but follow GB15607-1995 coating operation safety regulations when using.

Precautions:

1. Do not mix different types of powders.
2. Not recommended for outdoor use; fading and chalking may occur with long-term outdoor exposure.
3. 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.
4. Preheating: The temperature should be controlled between 180-230°C.

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