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.

3003 White Color Coated Aluminum Coil
3003 White Color Coated Aluminum Coil

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

AlloyChinese StandardAmerican StandardEuropean Standard
1xxx Series1050
1050AEN AW-1050A
3xxx Series30033003EN AW-3003
31053105EN AW-3105
5xxx Series50055005EN AW-5005
50525052EN AW-5052

Comparison of coated aluminum coils with different alloys

11000.95 Si + Fe0.05~

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.

Coating specifications
Coating specifications

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
ItemTestingStandardStandard requirementPVDFFEVEHDPE
1ColorECCA T3Using rangeMatt and dark colorsAll colorsAll colors
2GlossECCA T2Max. gloss degree358590
Min. gloss degree155020
3Coating ThicknessECCA T12 layers coating Min.23µm≥25µm≥25µm≥25µm
3 layers coating Min. 30µm≥34µmaccording to requirementsaccording to requirements
4Pencil HardnessECCA T4≥HBHBHH
5T-bendASTM D4145Aluminum thickness≥0.50mm90 degrees no crack/90 degrees no crack
Aluminum thickness<0.50mm2T2T2T
6AdhesionASTM D3359Grade 0Grade 0Grade 0Grade 0
7Impact ResistanceASTM D2794≥50kg.cm≥50kg.cm≥50kg.cm≥50kg.cm
8Boil ResistanceGB/T177482 hours no change4 hours no change2 hours no change2 hours no change
9Solvent ResistanceASTM D2248200 times no change200 times no change200 times no change200 times no change
10Acidity ResistanceASTM D13085%HCL 24h, no change5%HCL 24h, no changeno change2%HCL 24h, no change
11Alkalescence ResistanceASTM D13085%NaOH 24h,△E≤2.05%NaOH 24h,△E≤2.05%NaOH 24h, △E≤2.0saturated Ca(OH)2 24 hours△E≤2.0
12Nitric acid ResistanceAAMA620△E≤5.0△E≤5.0△E≤5.0, slight blister△E≤5.0, slight blister
13Oil ResistanceASTM D130820#Engine oil 24 hours no change20#Engine oil 24 hours no change20#Engine oil 24 hours no changeno change
14Salt ResistanceASTM B1174000hours no less than grade 14000hours no less than grade 14000hours no less than grade 12000 hours corrosion edge≤2mm
15Abrasion ResistanceASTM D968≥5L/µm≥5L/µmWaiting for the third-party testingWaiting for the third-party testing
16Dirt ResistanceGB/T9780≤5%<5%Waiting for the third-party testingWaiting for the third-party testing
17Color retentionGB/T162594000hrs,△E≤4.04000hrs,△E≤4.02000 hours△E≤4.02000 hours△E≤4.0
18Gloss weaken level4000hours no less than grade 24000hours no less than grade 22000h, no less than grade 22000h, no less than grade 2
19Chalk resistance4000 hours no change4000 hours no change(no less than grade 2)2000hours, no less than grade 22000hours, no less than grade 2
20Fluoride resin percentage70%≥95%none
21Guarantee for exterior usingGB/T1625910-15 years in different colors10-15 years in different colors7-8 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.

Coated aluminium coil display
Coated aluminium coil display

Coated aluminium coil display
Coated aluminium coil display

Coated aluminium coil display
Coated aluminium coil display

Coated aluminium coil display
Coated aluminium coil display

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:

Aluminum coil coating process
Aluminum coil coating process
  1. Mechanical stitching of the strip to its predecessor
  2. Cleaning the strip
  3. Power brushing
  4. Surface treatment by chemical conversion
  5. Drying the strip
  6. Application of primer on one or both sides
  7. Passage through the first curing oven (between 15 to 60 seconds)
  8. Cooling down the strip
  9. Coating the finish on one or both sides
  10. Passage through the second curing oven (between 15 to 60 seconds)
  11. Cooling down to room temperature
  12. 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.

Color Coated Aluminum Coil application
Color Coated Aluminum Coil application

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.