What is coated aluminum coil?
Color coated aluminium coil refers to aluminium coil which has gone through coating and coloring treatment steps. It shows stronger corrosion resistance with a layer of coating. Classified by coated materials, it generally includes PE coated aluminium coil and PVDF coated aluminum coil. Huawei produces color coated aluminum coil of 1000 series, 3000 series, 5000 series and 8000 series.
Specification of coated aluminium coil
Alloys: series 1000, 3000, 5000 and 8000.
Thickness: from 0.1 to 0.5 mm.
Strip width: from 500 to 1.600 mm.
Maximum outside diameter: 1.840 mm.
Inside diameter: 150, 405 and 508 mm.
Maximum coil weight: 6 tonnes.
Alter name of coated aluminium coil
- Painted Aluminium Coil
- Prepainted aluminum coil
- Color-coated aluminum sheet
- Coil coated aluminum
- Color coated metal coil
Alloys of Color Coated Aluminum Coil
| Alloy | Chinese Standard | American Standard | European Standard |
| 1xxx Series | 1050 | – | – |
| 1050A | – | EN AW-1050A | |
| 1100 | 1100 | – | |
| 3xxx Series | 3003 | 3003 | EN AW-3003 |
| 3105 | 3105 | EN AW-3105 | |
| 5xxx Series | 5005 | 5005 | EN AW-5005 |
| 5052 | 5052 | EN AW-5052 |
Comparison of coated aluminum coils with different alloys
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Others： Each |
Others: Total |
Al:Min. |
| 1050 | 0.25 | 0.40 | 0.05 | 0.05 | 0.05 | – | 0.05 | 0.03 | 0.03 | – | 99.50 |
| 1050A | 0.25 | 0.40 | 0.05 | 0.05 | 0.05 | – | 0.07 | 0.05 | 0.03 | – | 99.50 |
| 1100 | 0.95 Si + Fe | 0.05~0.20 | 0.05 | – | – | 0.10 | – | 0.05 | 0.15 | 99.0 | |
| 3003 | 0.60 | 0.70 | 0.05~0.20 | 1.0~1.5 | – | – | 0.10 | – | 0.05 | 0.15 | remainder |
| 3105 | 0.60 | 0.70 | 0.30 | 0.3~0.8 | 0.2~0.8 | 0.20 | 0.40 | 0.10 | 0.05 | 0.15 | remainder |
| 5005 | 0.30 | 0.70 | 0.20 | 0.20 | 0.5~1.1 | 0.1 | 0.25 | – | 0.05 | 0.15 | remainder |
| 5052 | 0.25 | 0.40 | 0.10 | 0.10 | 2.2~2.8 | 0.15~0.35 | 0.10 | – | 0.05 | 0.15 | remainder |
Classification of color coated aluminum coils
Coated aluminum coils can be classified based on the type of coating used:
PE (Polyester) Coated Aluminum Coil
Polyester coated aluminum coil is an anti-UV coating. Polyester resin uses a high molecular polymer containing ester bonds in the main chain as a monomer. Alkyd resin is added. UV absorbers can be divided according to glossiness. Matte and high gloss range. Especially suitable for interior decoration and advertising boards.
PVDF (Polyvinylidene Fluoride) Coated Aluminum Coil
Pvdf coated aluminum coil are made of fluorocarbon resin with fluorine as the basic monomer, pigments, alcohol ester solvents and additives. After the film is formed by high-temperature barbecue, the molecular structure of the coating is tight and has super weather resistance. Fluorocarbon coatings can be divided into traditional fluorocarbon and nano-fluorocarbon coatings according to the surface film formation structure. It is especially suitable for decoration and display of indoor and outdoor decoration in public places, commercial chains, exhibition advertising, etc.
| PVDF & PE coated aluminum coil performance | ||||||
| Item | Testing | Standard | Standard requirement | PVDF | FEVE | HDPE |
| 1 | Color | ECCA T3 | Using range | Matt and dark colors | All colors | All colors |
| 2 | Gloss | ECCA T2 | Max. gloss degree | 35 | 85 | 90 |
| Min. gloss degree | 15 | 50 | 20 | |||
| 3 | Coating Thickness | ECCA T1 | 2 layers coating Min.23µm | ≥25µm | ≥25µm | ≥25µm |
| 3 layers coating Min. 30µm | ≥34µm | according to requirements | according to requirements | |||
| 4 | Pencil Hardness | ECCA T4 | ≥HB | HB | H | H |
| 5 | T-bend | ASTM D4145 | Aluminum thickness≥0.50mm | 90 degrees no crack | / | 90 degrees no crack |
| Aluminum thickness＜0.50mm | 2T | 2T | 2T | |||
| 6 | Adhesion | ASTM D3359 | Grade 0 | Grade 0 | Grade 0 | Grade 0 |
| 7 | Impact Resistance | ASTM D2794 | ≥50kg.cm | ≥50kg.cm | ≥50kg.cm | ≥50kg.cm |
| 8 | Boil Resistance | GB/T17748 | 2 hours no change | 4 hours no change | 2 hours no change | 2 hours no change |
| 9 | Solvent Resistance | ASTM D2248 | 200 times no change | 200 times no change | 200 times no change | 200 times no change |
| 10 | Acidity Resistance | ASTM D1308 | 5%HCL 24h, no change | 5%HCL 24h, no change | no change | 2%HCL 24h, no change |
| 11 | Alkalescence Resistance | ASTM D1308 | 5%NaOH 24h,△E≤2.0 | 5%NaOH 24h,△E≤2.0 | 5%NaOH 24h, △E≤2.0 | saturated Ca(OH)2 24 hours△E≤2.0 |
| 12 | Nitric acid Resistance | AAMA620 | △E≤5.0 | △E≤5.0 | △E≤5.0， slight blister | △E≤5.0， slight blister |
| 13 | Oil Resistance | ASTM D1308 | 20＃Engine oil 24 hours no change | 20＃Engine oil 24 hours no change | 20＃Engine oil 24 hours no change | no change |
| 14 | Salt Resistance | ASTM B117 | 4000hours no less than grade 1 | 4000hours no less than grade 1 | 4000hours no less than grade 1 | 2000 hours corrosion edge≤2mm |
| 15 | Abrasion Resistance | ASTM D968 | ≥5L/µm | ≥5L/µm | Waiting for the third-party testing | Waiting for the third-party testing |
| 16 | Dirt Resistance | GB/T9780 | ≤5% | ＜5% | Waiting for the third-party testing | Waiting for the third-party testing |
| 17 | Color retention | GB/T16259 | 4000hrs，△E≤4.0 | 4000hrs，△E≤4.0 | 2000 hours△E≤4.0 | 2000 hours△E≤4.0 |
| 18 | Gloss weaken level | 4000hours no less than grade 2 | 4000hours no less than grade 2 | 2000h, no less than grade 2 | 2000h, no less than grade 2 | |
| 19 | Chalk resistance | 4000 hours no change | 4000 hours no change（no less than grade 2） | 2000hours, no less than grade 2 | 2000hours, no less than grade 2 | |
| 20 | Fluoride resin percentage | 70% | ≥95% | none | ||
| 21 | Guarantee for exterior using | GB/T16259 | 10-15 years in different colors | 10-15 years in different colors | 7-8 years in different colors | |
Characteristics of color-coated aluminum coils
Color-coated aluminum coils are coated with a layer of paint, typically a polyester-based paint, on the surface of aluminum coils. Here are some characteristics of color-coated aluminum coils:
- Weather Resistance: The coating on color-coated aluminum coils provides excellent weather resistance, protecting the underlying aluminum from corrosion, UV rays, and other environmental factors.
- Durability: The coating enhances the durability of aluminum, making it suitable for outdoor applications where the material is exposed to harsh conditions.
- Aesthetics: Color-coated aluminum coils are available in a wide range of colors and finishes, allowing for customization and aesthetic appeal in architectural and decorative applications.
- Lightweight: Aluminum is inherently lightweight, and the coating adds minimal weight, making it suitable for applications where weight is a concern.
- Easy Maintenance: The coating on color-coated aluminum coils is easy to clean and maintain, helping to preserve the appearance of the material over time.
- Formability: Aluminum is highly formable, and the coating does not significantly affect its formability, making it suitable for a variety of applications that require shaping.
- Environmentally Friendly: Aluminum is recyclable, and the coating can be applied using environmentally friendly processes, making color-coated aluminum coils a sustainable choice.
- Cost-Effective: While the initial cost of color-coated aluminum coils may be higher than some other materials, their durability and low maintenance requirements can make them cost-effective in the long run.
Overall, color-coated aluminum coils offer a combination of aesthetic appeal, durability, and environmental sustainability, making them a popular choice for a variety of applications, including building materials, signage, and automotive components.
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Why use coated aluminium coil?
- Enhanced durability: The coating protects the aluminum from corrosion, scratches, and fading, extending its lifespan.
- Improved aesthetics: The wide range of colors and finishes enhances the visual appeal of the material.
- Versatility: Coated aluminum coils can be used in various applications, including roofing, siding, and interior design.
- Cost-effective: Compared to other materials, coated aluminum coils provide a cost-effective solution for many applications.
The aluminum coil coating process
The following steps take place on a modern coating line:
- Mechanical stitching of the strip to its predecessor
- Cleaning the strip
- Power brushing
- Surface treatment by chemical conversion
- Drying the strip
- Application of primer on one or both sides
- Passage through the first curing oven (between 15 to 60 seconds)
- Cooling down the strip
- Coating the finish on one or both sides
- Passage through the second curing oven (between 15 to 60 seconds)
- Cooling down to room temperature
- Rewinding of the coated coil
Applications of Color-Coated Aluminum Coil
Building and Construction: Color-coated aluminum coils are used in the construction industry for roofing, wall cladding, and facade systems. The coils provide an attractive and durable finish that can withstand harsh weather conditions.
Transportation: The lightweight nature of aluminum makes it ideal for use in transportation applications. Color-coated aluminum coils are used in the manufacturing of automotive parts, such as body panels, trim, and wheels, due to their durability and corrosion resistance.
Signage and Displays: Color-coated aluminum coils are commonly used in the signage industry for the production of outdoor and indoor signs, as well as displays and exhibition stands. The coils can be easily shaped and customized to create eye-catching designs.
Consumer Goods: Color-coated aluminum coils are used in the manufacturing of consumer goods, such as appliances, electronics, and furniture. The coils provide a durable and attractive finish that can enhance the appearance of products.
Packaging: Color-coated aluminum coils are used in the packaging industry for the production of food and beverage cans, as well as other packaging materials. The coils provide a protective and decorative finish that can help products stand out on the shelf.
Solar Panels: Color-coated aluminum coils are used in the manufacturing of solar panels due to their lightweight nature and durability. The coils can be used to create frames and mounting systems for solar panels.
Other Applications: Color-coated aluminum coils are also used in a variety of other applications, such as awnings, garage doors, gutters, and downspouts, due to their durability, aesthetics, and weather resistance.
Color coated aluminum coil price
The price of color-coated aluminum coils can vary depending on several factors, including the quality of the coating, the thickness and width of the coil, the color and finish of the coating, and the supplier or manufacturer. Additionally, market conditions, such as the cost of raw materials and supply and demand dynamics, can also impact the price.
As of my last update, prices for color-coated aluminum coils typically ranged from $2500 to $4000 per metric ton. However, these prices can fluctuate based on the factors mentioned above. It’s best to contact suppliers or manufacturers directly for current pricing information based on your specific requirements.
