Prepainted aluminum coil, color-coated aluminum coil (PPAL), and color-coated steel coil are two of the most commonly used metal materials in the construction and industrial sectors. Prepainted aluminum boasts lightweight, excellent corrosion resistance, long lifespan, aesthetic appeal, environmental friendliness, and ease of processing. It is the preferred material for projects requiring minimal structural load, high-corrosion environments, and demanding design requirements.
Prepainted Aluminum Coil For sale
Wanzhi Group is a Chinese supplier of prepainted metal materials. Our product range includes prepainted galvanized coil sheet, prepainted galvalume coil sheet, and prepainted aluminum coil sheet. We provide raw material production and additional services such as bending, slitting, forming, and stamping.
Specifications
| Substrate | Aluminum alloy sheet |
| thickness | 0.2-3.0mm |
| Width | 600-1250mm/ customized |
| Length | Customizable coils or cut-to-length sheets are available. |
| Chemical conversion layer | chrome or zirconium treatment |
| Primer | epoxy resin |
| Top coat | polyester (PE), fluorocarbon (PVDF), or nano-coating (15-30μm) |
Product Forms
Prepainted aluminum Coil: Easy to transport and store, suitable for bulk purchase by large fabricators.
Prepainted aluminum Sheet: Single steel sheets cut from coils for direct processing by fabricators.
Prepainted aluminum Strip: Strips of varying widths are obtained by slitting coils.
Grades and Standards
| Standard System | Core Substrate Standard | Core Coating Performance Standard |
| United States (ASTM/AAMA) | ASTM B209 | AAMA 2605 (PVDF) |
| Europe (EN/QUALICOAT) | EN 485 | QUALICOAT GSB Class 4 (certified) |
| Japan (JIS) | JIS H 4000 | – |
| China (GB) | GB/T 3880 | GB/T 17748 (Aluminum composite panel for buildings) |
Factory
Wanzhi Group‘s prepainted metal factory is located in Boxing County, Binzhou City, Shandong Province, China. We provide OEM/ODM services for coated metal materials, customizing products with unique materials, colors, coatings, and performance characteristics based on customer drawings, specifications, and application scenarios. We also offer customized processing services such as slitting, cutting to length, embossing, printing, and laminating. To date, our products have been exported to over 100 countries and regions, including North America, South America, Europe, the Middle East, Southeast Asia, and Australia. We have extensive export experience and can provide comprehensive export packaging and logistics solutions.
Structure of Prepainted Aluminum Coil
Prepainted aluminum coil consists of an aluminum substrate, chemical conversion layer, primer, topcoat, and protective film. The aluminum substrate typically utilizes 1-series, 3-series, and 5-series aluminum alloy coils, such as 1100 (pure aluminum), 3003 (aluminum-manganese alloy), and 5005 (aluminum-magnesium alloy). The substrate determines the mechanical properties, formability, and environmental suitability of the prepainted aluminum. Coatings, including primer, topcoat, and backcoat, determine the material’s decorative and other functional properties.
Aluminum Substrate
Compared to steel substrates, aluminum substrates as prepainted metal can significantly reduce structural loads, simplify support structures, offer improved corrosion resistance, superior electrical and thermal conductivity, and formability.
| Aluminum Series | Examples |
| Series 1 | 1050, 1060, 1100 |
| Series 5 | 5052, 5083, 5754 |
| Series 3 | 3003, 3004 |
| Series 6 | 6061, 6063 |
Coatings and Films
The coating process for pre-painted aluminum coil is similar to that for pre-painted steel. The paint material, film, and surface treatment can be selected based on application requirements.
Paint Options
- PVDF coating: The gold standard for pre-painted aluminum coil, especially for high-end architectural applications.
- PE/Polyester coating: Offers an excellent balance of cost and performance.
- SMP silicone-modified polyester coating: Provides improved gloss retention and color retention.
- HDP high-durability polyester: Performance similar to PVDF, at a lower cost.
Surface Finishes
- Standard Smooth Surfaces: High Gloss, Semi-Matte, and Full Matt.
- Textured Surfaces: Suede, fine wrinkles, orange peel, and leather.
- Metallic Effects: A shimmering metallic finish, such as champagne gold and metallic silver, is achieved through coatings containing aluminum powder.
- Bionic Effects: Using a printed roller coating technique, the texture and feel of natural materials like wood, stone, and leather can be precisely simulated, as well as patterns of flowers, birds, fish, and blue skies.
Prepainted Aluminum Coil Features and Benefits
- Lightweight: Aluminum has a density of approximately 2.7 g/cm³, effectively reducing loads in architectural and other applications.
- Corrosion Resistance: The inherent corrosion resistance of the aluminum base combined with the dual protection of the organic coating ensures an extremely long lifespan, making it particularly suitable for highly corrosive environments such as coastal and industrial areas, characterized by humidity, acid rain, and high temperatures.
- Decorative and Aesthetic: Prepainted aluminum coil can be customized in color, finish, gloss, and texture to meet specific application requirements.
- Machinability: Aluminum’s excellent ductility makes it easy to cut, punch, bend, and deep-draw, allowing it to be formed into a variety of complex shapes.
- Low Maintenance: The smooth surface resists dust and washes clean with rainwater. It is durable and resists fading, ensuring minimal maintenance.
- Fire Resistance: Aluminum is a Class A non-combustible material.
Prepainted Aluminum Coil Applications
- Architectural Curtain Wall and Roofing Systems: Curtain walls, roofs, exterior walls, and roofs of large public buildings, such as coastal buildings, high-end commercial buildings, airport terminals, high-speed rail stations, stadiums, and cultural centers.
- Interior Decoration: Ceilings, wall decorations, partitions, furniture, store counters, etc.
- Home Appliances: High-end appliance panels, etc.
- Transportation: Rail transit (high-speed rail, subway) carriage interior panels, ship compartments, automotive trim, luggage, etc.
- Electronic and Electrical Appliances: Electronic product casings, LED lampshades, radiators, etc.
- Packaging: High-end food packaging, bottle caps, gift boxes, etc.
- Further Processing: Used in the production of aluminum-magnesium-manganese plate, aluminum veneer, composite aluminum plate, aluminum-plastic panel panels, and honeycomb panel panels.
Comparison between Prepainted Aluminum Coil and Colored Steel
| Feature | Color Coated Steel (PPGI/PPGL) | Color Aluminum (PPAL) |
| Substrate | Galvanized steel, galvalume steel, zinc-aluminum-magnesium ZAM steel | Aluminum alloy (commonly 3003, 3004, 5005 series) |
| Density/Weight | Heavy (steel density approx. 7.85 g/cm³) | Light (aluminum density approx. 2.7 g/cm³) |
| Strength | High (tensile and yield strength) | Lower |
| Corrosion Resistance | Good | Excellent |
| Service Life | 15-25 years (depends on substrate and paint material) | 20-40+ years, even in harsh environments |
| Cost | Low | High |
| Processability | Good | Excellent |
| Appearance | Good | Excellent |
| Recyclability | Recyclable | 100% infinitely recyclable |
| Thermal Expansion Coefficient | Relatively low | Relatively high |
| Thermal Conductivity | Poor | Good |
Customized Colored Aluminum Coils
Wanzhi Group offers exclusive, personalized solutions. We provide in-depth customization services, from raw materials and processing to packaging.
- Customized Alloy Grades: We offer a variety of aluminum alloy base materials to match different mechanical properties and application requirements.
- Customized Coating Systems: We select coating systems and film thicknesses based on weathering requirements.
- Customized Colors and Effects: We select colors from the RAL color chart and customize special effects.
- Customized Sizes: We offer precise control over thickness, width, and length.
As a professional prepainted aluminum coil supplier, Wanzhi Steel can recommend the most suitable aluminum base material solution based on your specific application, processing method, and budget. We can also provide samples and material certificates. Please contact us for a quote.