Pre-Painted Galvanized Steel Coil / Sheet / Plate (PPGI/PPGL)
Huaxiao-Alloy’s Pre-Painted Galvanized Steel combines dual-layer protection: a zinc-based metallic substrate (GI or GL) with advanced polymer coatings – engineered to withstand UV degradation, chemical exposure, and mechanical stress while maintaining color integrity for 20-40 years. Precision-formulated for façades, appliances, and specialty enclosures where performance and aesthetics converge.
1. PRODUCT SPECIFICATIONS & ARCHITECTURE
Base Material Options
| Substrate | Standard | Coating Mass | Key Attributes |
|---|---|---|---|
| Galvanized (GI) | ASTM A653 | Z60-Z275 (60-275g/m²) | Cost-effective, weldable |
| Galvalume® (GL) | ASTM A792 | AZ60-AZ150 (60-150g/m²) | 3-5x cut-edge corrosion resistance |
| Zinc-Al-Mg (ZM) | EN 10346 | AZ100-AZ200 (100-200g/m²) | Self-healing scratches, salt spray >2,000hrs |
Coating System Structure
1. Steel Substrate (0.3-3.0mm)
2. Metallic Coating (Zinc/Al-Zn/Zn-Al-Mg)
3. Chromate Conversion Layer (≤15mg/m² Cr⁶⁺-free)
4. Primer (5-8µm): Epoxy/Polyester/Polyurethane
5. Topcoat (15-25µm): PVDF/SMP/Polyester/Siliconized Polyester
6. Clear Coat (Optional): Anti-graffiti/UV-filter
2. COATING PERFORMANCE MATRIX
| Coating Type | Gloss (%) | Color Retention (10y) | Salt Spray (hrs) | QUV Resistance | Max Temp |
|---|---|---|---|---|---|
| Polyester (PE) | 20-80 | ΔE≤5 | 500-800 | 1,000h | 100°C |
| SMP (Silicone Modified Polyester) | 15-50 | ΔE≤3 | 1,000+ | 2,000h | 120°C |
| PVDF (70% PVDF) | 10-40 | ΔE≤2 | 1,500+ | 3,000h | 140°C |
| Fluoropolymer (FEVE) | 40-90 | ΔE≤1 | 2,000+ | 5,000h | 180°C |
ΔE = Color shift per ASTM D2244 | QUV = ASTM G154 Cycle 4
3. MECHANICAL & PHYSICAL PROPERTIES
| Property | Test Method | Typical Value | Industry Impact |
|---|---|---|---|
| Adhesion | ASTM D3359 (Cross-cut) | Class 5B | Survives forming/stamping |
| Pencil Hardness | ASTM D3363 | 2H-4H | Scratch/mar resistance |
| Impact Resistance | ASTM D2794 | 90-150 kg·cm | Withstand hail/impact |
| Flexibility (T-Bend) | ASTM D4145 | 0T-2T | Compatible with roll-forming |
| Solar Reflectivity | ASTM E903 | 80-85% (white) | LEED/EnergyStar compliance |
4. STANDARD PRODUCT RANGE
Architectural Grades (AAMA 2603-2605 Certified)
| Code | Topcoat/Primer | Substrate | Thickness | Finish |
|---|---|---|---|---|
| PPG-AP | PVDF/Polyester | GL AZ90 | 0.5-1.2mm | Matte/Smooth |
| PPG-SMP | SMP/Epoxy | ZM AZ150 | 0.4-1.0mm | Texture/Embossed |
| PPG-FEVE | FEVE/Polyurethane | GI Z180 | 0.3-0.8mm | High-Gloss |
Industrial Grades
| Code | Topcoat/Primer | Substrate | Special Features |
|---|---|---|---|
| PPG-EP | Epoxy/Epoxy | GI Z120 | Chemical resistance (ISO 2812-1) |
| PPG-ECP | Conductive Epoxy/Polyester | GL AZ75 | EMI Shielding (30-60 dB) |
| PPG-FR | Intumescent Coatings | GI Z100 | Fire Rating (ASTM E84 Class A) |
5. INDUSTRY-SPECIFIC SOLUTIONS
| Sector | Application | Huaxiao Solution | Certifications |
|---|---|---|---|
| Building Envelope | Curtain walls, roofing | PPG-AP (PVDF) | AAMA 2605, EN 13501-1 B-s1,d0 |
| HVAC | Air handling units | PPG-SMP (Anti-microbial) | NSF/ANSI 51, ISO 22196 |
| Transport | RV siding, trailer panels | PPG-FEVE (Self-cleaning) | GMW14872, SAE J2334 |
| Appliances | Refrigerator doors | PPG-HG (High-Gloss PE) | IEC 60335-2-24, FDA CFR 21 |
6. HUAXIAO-ALLOY ADVANTAGES
Coating Science Leadership
- Color Consistency: ΔE≤0.8 batch-to-batch (HunterLab Spectrophotometry)
- Edge Protection: Laser-sealed cut edges + touch-up coating systems
- Sustainable Chemistry: Zero Cr(VI), VOCs ≤50g/L (EU Directive 2004/42/CE)
Precision Manufacturing
- In-line coil coating (CPM 120m/min) with IR/UV curing
- 3-stage surface treatment (alkaline clean → rinse → nano-conversion)
- Automated defect detection (AOI with 10μm resolution)
Global Compliance & Support
- Certifications: QUALICOAT Class 2/3, GSB International, NCCA
- Digital Tools: Color matching app, weathering prediction software
- Technical Support: On-site forming/welding training
FAQs: Pre-Painted Galvanized Steel Coil / Sheet / Plate (PPGI/PPGL)
A: Use reverse-roll coating primers with >8% elongation. Huaxiao’s FlexiPrime™ technology enables 180° bending at 0T.
A: PVDF/SMP coatings maintain ΔE≤2 after 10 years Florida exposure (AAMA 2605 data). Avoid standard polyester.
A: 1) Low-pressure wash (<100 bar) 2) pH-neutral cleaners 3) Non-abrasive cloths. Download Huaxiao’s MTC-02 maintenance guide.
A: 10 MT per color with ΔE≤1.0 guarantee (spectrophotometer report included).
A: 20-year warranty against chalking/fading (ΔE≤5) when installed per Huaxiao’s AMI-2024 guidelines.
A: Class A fire-rated panels available with intumescent coatings (ASTM E84 flame spread ≤25).
Pre-Painted Galvanized Steel Coil / Sheet / Plate (PPGI/PPGL)
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