Color Coated 5052 Aluminium Sheet Coil
Color Coated 5052 Aluminium Sheet Coil is a premium-grade aluminum alloy product characterized by excellent corrosion resistance, high strength, and outstanding paint adhesion. It’s tailored with an advanced color coating process, combining the inherent benefits of 5052 aluminum alloy with vibrant, durable coatings to meet multisectoral design and functional requirements.
Alloy Composition and Properties of 5052 Aluminum
The 5052 aluminum alloy falls under the category of non-heat-treatable alloys, primarily composed of Aluminum with roughly 2.5% Magnesium and small amounts of Chromium. This specific composition imparts mechanical and chemical advantages:
- Corrosion Resistance: Exceptional resistance to oxidization and saltwater exposure, vital for marine environments and coastal infrastructure.
- Strength: Tensile strength approximately 228 MPa and yield strength roughly 193 MPa — higher compared to pure aluminum sheets.
- Weldability and Formability: Excellent capability to form complex shapes and weld securely.
- Lightweight: Offers a high strength-to-weight ratio, improving ease of handling and reducing overall structural weight.
What is Color Coating?
Color coating refers to the application of multiple protective layers on an aluminum coil surface, typically involving:
- Pre-treatment: Cleaning and chemically preparing the aluminum substrate.
- Primer layer: Enhances adhesion between the aluminum surface and topcoat paint.
- Organic topcoats: Polyurethane (PU), polyester (PE), or fluorocarbon (PVDF) paints providing vibrant hues, UV resistance, and scratch protection.
- Back coating: Applied on the reverse side for enhanced resistance to corrosion and mechanical damage.
This multilayer construction secures product longevity, minimizes maintenance, and elevates visual appeal.
Manufacturing Process
- Alloy Melting and Casting: Aluminum 5052 ingots or billets are heat-melted and cast into slabs.
- Hot Rolling: These slabs are hot rolled to sub-coils and cooled under controlled conditions.
- Cold Rolling: Further reduction in thickness improves mechanical reliability and surface finish.
- Surface Treatment: Cleaning, etching, and phosphating preps the surface for coating.
- Coating Application: Automatic production lines evenly spread primer and topcoat layers with precise curing.
- Cutting and Coil Finishing: Coated coils are trimmed and rewound to customer-specific dimensions.
Technical Specifications
| Parameter | Typical Value |
|---|---|
| Alloy Grade | 5052 |
| Temper | H14, H32 (custom by requirement) |
| Thickness Range | 0.2 mm to 3.0 mm |
| Width Range | 100 mm to 1500 mm |
| Coil Weight | 3 tons to 7 tons per coil |
| Coating Thickness | Primer: 2-5 microns; Topcoat: 18-25 microns |
| Coating Types | PVDF, PE, PU complying with AAMA standards |
Applications
- Architectural Facades and Decorative Panels: Lifetime color retention withstanding harsh weather exposure.
- Marine Equipment: Saltwater corrosion protection on boat and ship facades.
- Automotive Components: Lightweight, ergonomic, and colorful solution for body panels and interior trims.
- Appliances: Reliable finish on refrigerators, ovens, and electronics with curved or flat surfaces.
- Village and Sign Boards: Durable, eye-catching panels resistant to fading and scratches.
Benefits of Color Coated 5052 Aluminium Sheet Coil
- Long-term Durability: High resistance to abrasion, UV degradation, and chemicals.
- Lightweight yet Strong: Perfect balance of tensile strength and weight cutoff.
- Wide Color Range: Custom color matching possibility based on customer demand.
- Low Maintenance Cost: With stand years of surface degradation without needing repaint or refurbishment.
- Corrosion Resistance Property: Essential where contact with moisture, seawater or chemicals is expected.
- Weight Saving and Energy Efficiency: Especially useful in transportation and construction industries.
Quality Assurance & Certifications
The production of color coated 5052 aluminum coils undergoes rigorous quality control processes adhering to international standards such as:
- ASTM B209 / B209M
- EN 485-2 / EN 573-3
- RoHS compliance
- ISO 9001:2015 certified manufacturing units
Testing includes adhesion, color fastness, gloss levels, thickness uniformity, and durability against salty spray conditions.
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