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This product has high reactivity, excellent adhesion, high cross-linking density, and excellent chemical resistance, solvent resistance, cathodic peel resistance, long-lasting antibacterial effect, excellent flexibility, impact resistance, and other properties of the coating.
Suitable for municipal drinking water dedicated pipelines.
1. Excellent adhesion to the substrate;
2. The coating surface has good leveling and high gloss;
3. Has excellent resistance to infiltration and corrosion;
4. High surface hardness and strong coating density;
5. The coating has excellent resistance to high-temperature cathode peeling;
6. Good mechanical performance and extremely strong flexibility;
7. Low melting temperature, high reaction activity, and high solidification completion rate;
8. The product has passed the EU WRAS water hygiene and safety testing certification and meets the safety evaluation standards for protective materials for drinking water.
Performance parameters of powder coating
experimental project | technical indicators | remark |
appearance | Uniform color, no lumps | visual inspection |
color | According to customer requirements | colorimeter |
Density (g/cm2) | 1.3~1.5 | GB/T 4472 |
particle size distribution | 150um sieve powder ≤ 3.0 250um sieve powder ≤ 0.2 | GB/T 2482-1986 |
Non volatile matter content (%) | ≤99.4 | GB/T 2482-1986 |
Magnetic content (%) | ≤0.002 | GB/T 2482-1986 |
Gelation time (s) | ≤180s (180°C) ≤120s (200°C) ≤60s (230°C) | GB/T 6554-1986 GB/T 6554-1986 |
Horizontal liquidity (mm) | 22~28 | GB/T 6554-1986 GB/T 6554-1986 |
Performance parameters of powder coating film after curing
experimental project | technical indicators | remark |
appearance | Flat, uniform color, no bubbles, no cracking or shrinkage, mild orange peel allowed | visual inspection |
Adhesion (grade) | 1~3 | SY/T 0442-1997 |
Cathodic peel resistance 65 ° C48h (mm) | ≦8 | SY/T 0413-95 |
Bending resistance (40) | crack-free | SY/T 0442-1997 |
Electrical strength (MV/m) | ≧30 | GB/T 1408-1989 |
Impact resistance strength | ≧11 | SY/T 0442-1997 |
Corrosion resistance to chemical media | qualified | GB/T 1763-1979 |
Wear resistance 1000g at 1000rpm | ≦20g | GB/T 1768-1979 |
Salt spray test (1000h) | No change in coating | GB/T 1771-1991 |
Flattening test (flattening ratio 4/5) | No cracks in the weld seam | CJ/T 120-2008 |
Water immersion test | qualified | GB-T 17219-1998 |
CJ/T120-2008 "Composite Coated Steel Pipes for Water Supply'; GB/T17219-1998 Safety Evaluation Standard forEquipment and Protective Materials in Drinking Water Transmission and Distribution'
project | workpiece temperature | curing time |
low-temperature curing | 130°C | 15min |
High temperature curing | 200~230°C | 3~1.5min |
Note: The recommended curing conditions all refer to the workpiece temperature. Deviations in temperature mayaffect the performance of the coating or prevent it from being fully realized. Curing can be achieved throughmedium-frequency heating or other heating methods.
1. Applicable equipment Processes such as friction charging spraying, corona electrostatic spraying, suction coating,dip coating, roller coating, etc.
2. Coating thickness Adjustable between 200 ~ 600um according to workpiece requirements
1. This product is non-toxic and non-flammable, but please comply with the GB15607-1995 safety regulations forpaint application operations when using it.
1. This product is not recommended for outdoor use of workpieces, otherwise phenomena such as fading andpowdering may occur.
2. The steel pipe surface should be free of oil stains and moisture, with surface treatment quality reaching Sa21/2grade (GB/T8923). The anchor pattern depth should be 40-100um, and dust or abrasive particles adhering to the pipesurface must be thoroughly blown clean.
3. Preheating: The temperature should be controlled between 180 ~ 230°C;
4. Powder products should be stored in a ventilated, dry indoor environment with temperatures below 30°C, awayfrom heat sources, corrosive chemicals, and chemical solvents, avoiding strong light exposure;the maximum stackingheight should not exceed 5 layers; avoid prolonged pressure to ensure the packaging is tightly sealed, preventingclumping and moisture absorption, which could affect fluidization performance;
5. To ensure thorough curing of the epoxy coating and maximize its anti-corrosion effect it is recommended topreheat the steel pipe surface temperature above 200°C, which enhances the curing completion rate;
6. Do not mix with other anti-corrosion powder coatings or recycled powder, and thoroughly clean the sprayingequipment when changing colors to ensure drinking water safety and compliance with the EU WRAS Water Supply(Water Fittings) Regulations hygiene and safety certification standards;
7. The product complies with the EU WRAS Water Supply (Water Fittings) Regulations hygiene and safety certificationstandards.