Blue Coated Aluminum Sheet
Blue Coated Aluminum Sheet is a premium aluminum product characterized by an additional protective and decorative blue-colored coating on its surface. This coating enhances the material's durability, corrosion resistance, and aesthetic appeal, making it a versatile choice across various industries such as construction, automotive, advertising, and electronics. The core aluminum substrate is typically from high-quality alloy groups, providing excellent structural properties combined with the functional benefits of the coating.
Material Composition & Properties
Base Aluminum Alloy
| Alloy Type | Common Grade | Aluminum Content (%) | Major Alloying Elements | Mechanical Properties |
|---|---|---|---|---|
| 1xxx | 1100 | ≥ 99.0 | Very low amounts of Cu, Fe | Excellent corrosion resistance, good ductility |
| 3xxx | 3003 | 96.8–99.5 | Mn | Good strength, corrosion resistance, workability |
| 5xxx | 5052 | 95.0–97.0 | Mg | Higher strength, excellent corrosion resistance |
Usually, grades like 1100 and 3003 are preferred for blue coated sheets, ensuring good formability and cost-effectiveness.
Coating Composition
- Type: Polyurethane or polyester-based paint, polyurethane being more weather-resistant.
- Color: Blue (various shades available as per customer requirements).
- Thickness: Typically ranges from 10 to 25 microns (μm).
- Additional Layers: Back-side coating may also be applied for improved resistance.
Physical & Mechanical Parameters
| Parameter | Value Range | Test Standard |
|---|---|---|
| Thickness (mm) | 0.3 – 3.0 | ASTM B209 |
| Width (mm) | 1000 – 1500 | ASTM B209 |
| Length (mm) | Custom-cut (up to coils) | Internal specification |
| Surface Roughness (Ra) | ≤ 0.5 μm | ISO 4287 |
| Tensile Strength (MPa) | 70 – 220 (depending on alloy) | ASTM E8/E8M |
| Elongation (%) | 10 – 30 | ASTM E8/E8M |
| Hardness (HB) | 30 – 60 | ASTM E10 |
| Coating Adhesion | ≥ 5B (Standard cross-cut test) | ASTM D3359 |
| Corrosion Resistance | Salt spray ≥ 100 hours | ASTM B117 |
Features
1. Corrosion Resistance
The blue coating acts as a barrier against moisture, chemical agents, and environmental factors, significantly improving the aluminum sheet's resistance to oxidation and corrosion.
2. Enhanced Aesthetics
The vibrant blue finish provides visual appeal due to its uniform surface color, suitable for applications where product appearance is critical.
3. Weather and UV Resistance
Polyester and polyurethane coatings provide robust resistance against UV radiation and weather exposure, preventing fading or peeling in outdoor applications.
4. Flexibility and Formability
The underlying aluminum alloy retains excellent ductility allowing the sheets to be bent, formed, and fabricated without cracking the coating.
5. Lightweight and High Strength
Leveraging the high strength-to-weight ratio of aluminum alloys, the sheets remain lightweight while capable of enduring various structural loads.
6. Easy Maintenance
The smooth coating surface facilitates easy cleaning, reducing cleaning intervals and maintenance costs.
Applications
1. Building and Architecture
- Roofing panels: Durable, corrosion-resistant material with decorative blue finish.
- Wall cladding and facades: Provides aesthetic exterior enhancement and prolongs structural life.
- Ceiling panels and decorative interiors: Lightweight and durable, easy to shape for architectural accents.
2. Automotive Industry
- Vehicle body panels: Corrosion-resistant coating protects surfaces from environmental damage.
- Interior trims: Lightweight blue-coated aluminum can be customized for aesthetic interior applications.
3. Advertising and Signage
- Outdoor signage boards: Coating withstands fast changing weather conditions withoutistering color.
- Billboard panels and exhibition equipment: Durable and visually attractive.
4. Electronics and Electrical Appliances
- Enclosures and casings: Elevate durability and aesthetics in consumer electronics.
- Heat sinks: Formability with blue painted finish offering protective decoration.
5. Marine Equipment & Transport
- Due to good corrosion resistance, suitable for smaller components on boats and ships exposed to saltwater environments.
Available Finishes
| Finish Type | Description |
|---|---|
| Glossy | High-reflective surface for vibrant appearance |
| Matte | Low-gloss, smooth finish with subtle visual appeal |
| Textured | Enhanced tactile surface, anti-slip effect |
Quality Assurance
- Strict inspection: Includes visual, coating adhesion, thickness uniformity, and metal purity tests.
- Standards compliance: ASTM, ISO, JIS as per client requirements.
- Environmental compliance: RoHS and REACH-compliant coatings.
Customization and Packaging
Blue Coated Aluminum Sheets can be customized in thickness, width, length, and coil/flat sheet format. Protective packaging with anti-scratch film available optionally, ensuring perfect condition upon delivery.
