Application industries, powder Coating

1. Product Overview

This product is formulated with special epoxy resin, dedicated curing agents, and food-grade pigments and fillers. It features high reaction activity, excellent adhesion, and high cross-linking density. The cured coating film provides outstanding performance in chemical resistance, solvent resistance, cathodic disbondment resistance, flexibility, and impact resistance.

2. Product Features

(1) Excellent bonding strength with the substrate.

(2) Excellent surface leveling and high gloss of the coating film.

(3) Outstanding resistance to penetration and corrosion.

(4) High surface hardness and dense coating structure.

(5) Excellent resistance to high-temperature cathodic disbondment.

(6) Low melting temperature, high reaction activity, and high curing completion rate.

(7) Excellent mechanical properties and outstanding flexibility.

(8) Complies with the safety evaluation standards for protective materials used in drinking water applications.

3. Powder Coating Performance Parameters

Item	Quality Requirements	Test Method
Appearance	Uniform color, no agglomeration	Visual inspection
Color	Silver white	GB/T 4472
Density (g/cm³)	1.3–1.5	GB/T 6554-1986
Particle Size Distribution (%)	Powder retained on 150 μm sieve ≤3	GB/T 6554-1986
	Powder above 250 μm ≤0.2	GB/T 6554-1986
Non-volatile Content (%)	≥99.4	GB/T 6554-1986
Gel Time (s)	≤180 s (180°C)	GB/T 6554-1986
	≤60 s (230°C)	GB/T 6554-1986
	≤60 s (230°C)	GB/T 6554-1986
Magnetic Material Content (%)	0.002	GB/T 2482-1986
Horizontal Flow (mm)	22–28	GB/T 6554-1986

4. Performance Parameters of Cured Powder Coating Film

No.	Test Item	Technical Requirements	Test Method
1	Appearance	Smooth surface, uniform color, no bubbles, cracks, or shrinkage holes; slight orange peel is acceptable	Visual inspection
2	Adhesion (Grade)	1–3	SY/T 0442-1997
3	Cathodic Disbondment Resistance at 65°C for 48 h (mm)	≤8	SY/T 0413-95
4	Bending Resistance	No cracks	SY/T 0442-1997
5	Dielectric Strength (MV/m)	≥30	GB/T 1408-1989
6	Impact Strength	≥11	SY/T 0442-1997
7	Chemical Medium Corrosion Resistance	Qualified	GB/T 1763-1979
8	Abrasion Resistance (1000 g × 1000 cycles)	≤20 mg	GB/T 1768-1979
9	Salt Spray Test (1000 h)	No change in coating film	GB/T 1771-1991
10	Flattening Test (Flattening Ratio 4/5)	No cracks	CJ/T 120-2008
11	Water Immersion Test	Qualified	GB/T 17219-1998

Applicable Standards:CJ/T 120-2008. GB/T 17219-1998

5. Precautions

(1) The steel pipe surface must be free from oil contamination and moisture. Surface preparation quality should reach Sa2½ grade (GB/T 8923). The recommended anchor profile depth is 50–90 μm. Dust and abrasive residues attached to the steel pipe surface must be completely removed by air blowing. The preheating temperature should be controlled at 180–230°C.

(2) The product should be stored indoors in a well-ventilated and dry environment at temperatures below 30°C, away from heat sources, corrosive chemicals, and chemical solvents. Avoid direct exposure to strong sunlight. The maximum stacking height should not exceed 4 layers. Avoid prolonged compression and keep packaging sealed to prevent powder caking and moisture absorption, which may affect fluidization performance.

(3) To ensure complete curing of the epoxy coating film and achieve optimal anticorrosion performance, it is recommended that the steel pipe surface temperature be preheated to above 170°C to improve the curing completion rate.

(4) This product must not be mixed with other anticorrosion powder coatings or recycled powder. The spraying equipment must be thoroughly cleaned when changing colors to ensure drinking water safety and compliance with hygiene standards.

6. Applicable Application Processes

Suitable for:

Electrostatic spraying

Roller coating

7. Application Areas

Specially designed for municipal drinking water pipeline anticorrosion protection.

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