Color Coated Aluminum Coil Complete Guide

2022-10-17 14:06
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Color Coated Aluminum Coil Complete Guide

As one of the most common aluminum materials, color-coated coils and sheets are widely used in various industrial projects. With excellent performance and cheap price, color coated aluminum coils are recognized as the optimal choice for most of people.

color coated coil

What is Color Coated Aluminum Coil?

The color coated aluminum coil is a new type of building material that has risen rapidly in the world in recent decades. It is refined by chemical pretreatment, initial coating, and fine coating on a continuous unit. The coating quality is more stable and ideal than the quality of single-piece spraying or intercalating on the formed metal surface. With the increasing requirements for color steel quality, high-quality color coated coils came into being, and the market demand continued to expand. The color coated coil is a composite material, also known as color coated steel plate, which is made of strip steel after continuous chemical treatment such as surface degreasing and phosphating on the production line, and then coated with organic coatings and baked. Color coated coil is characterized formability, weather resistance, strong coating adhesion, and can maintain colour novelty for a long time.

Coating Types of Color Coated Aluminum Coil

Finishing Coat

Commonly used finishing coats are polyester, silicon-modified polyester, and polyvinylidene difluoride. There are some differences in hardness, flexibility, corrosive resistance between different finishing coats. Polyester is currently the most common coating material. Although the durability is relatively average, hardness and flexibility of polyester coating are performing very well. If you’re looking for some durable coils, coils made by silicon-modified polyester is you rbest choice. Polyvinylidene difluoride shows good performance in hardness and durability, but it’s not flexible and more expensive than other materials. For more details, you can consult our professional manufacturers on Bestsuppliers.

Base Coat

The commonly used base coats are epoxy and polyester. Epoxy material binds well to the substrate and is resistant to corrosion, but not as flexible as other base coats. Polyester has good adhesion to the substrate and excellent flexibility, but corrosion resistance is not as good as epoxy.

Thickness of Coating

The corrosive resistance of the colour coated coil is closely related to the coating thickness. The appropriate coating thickness should be determined according to the environment, service life, and durability.

Gloss of Coating

galvanized steel coil

The coating gloss is mainly selected according to the use. For example, Household appliances with color coat coils usually choose high gloss.

Coating Hardness

Coating hardness is the ability of coating resistance to scratch, friction, collision, depression and another mechanical effect. The scratch resistance, wear resistance, and other properties are closely related to the color coated coil, mainly based on the use, processing mode, storage, and transportation to choose from.

Materials of Color Coated Coil

There are various materials of color coated coils for you to choose. Every material has its advantages and disadvantages. You can refer to the following table.




PE, PolyesterGood adhesion; Easy to processUV resistance is not ideal
SMP, Silicone Modified PolyesterExcellent color retention and heat resistanceMolding property is not ideal
PVC PlastisolGood water resistance and chemical resistanceRelatively poor environmental properties
PVDFGood corrosive resistance and color retentionExpensive

Surface Treatment Technology of Color Coated Coil

The improvement of surface treatment technology is one of the reason why color coated coil become more and more popular. There are some surface treatment process,such as passivation treatment. In brief, the process is to put a a layer of organic film on the surface, which will protect the surface away form the moisture and improve the adhesion and anti-corrosion performance. Passivation treatment is mainly used in the conventional galvanized coatings.

Application of Color Coated Coils

color coated steel coil
  1. Color coated coil is used in the construction industry. 
    In the construction industry, any board may play an important role. Colored boards like color-coated coils are also commonly used in the construction industry. Bestsuppliers has color coated coil for sale at cheap wholesale price. Color rolls can also formulate different production standards according to the requirements of different construction industries, as well as the requirements of different construction projects for coating and color.
  2. Color coated coil is used in the decoration of doors and windows. 
    The color coated coil is also suitable for the decoration of doors and windows, especially the rolling shutter doors or ceilings of some houses that can be decorated with the color coated coil. Color coated aluminum coil has a good decorative effect in the door and window industry and can make doors, windows or ceilings have a long service life.
  3. Color coated coil is used in the household appliance industry.
    The household appliance industry is also the main industry of color coated sheets, because some refrigerators and washing machines will use color coated sheets. More specific, the door shells and side panels of refrigerators, or doors of some freezers, and the shell of washing machines are composed of color-coated boards and other materials.
  4. Color coated coil is used in purification projects. 
    Color coated coil, stainless steel and other materials are used as the composite plate of the surface material. Because of its unique dustproof, antistatic, antibacterial and other effects, it is widely used in medical, electronics, medicine, food, biology, aerospace, precision instrument manufacturing and scientific research. Also, it has been widely used in the field of purification engineering with high indoor environment requirements. You can contact our suppliers for high quality color steel coils here!

How to Choose Color Coated Coils?

stainless steel coil

A lot of people in the purchase of color coated coil can not recognize what is good color coated coil, because it’s hard to see the difference from the surface between the good one and the bad one. Here are some tips for you to choose a quality color coated aluminum coils. Firstly, Choose the inorganic pigment. This kind of paint has better ability of heat reflection, which will extend the service life of coating. Also, regarding the colors of coil, the light color is better than dark colors as the galvanized coils with dark color is easy to fade when exposed in the ultraviolet light. For the materials of color coated aluminum coils, you can choose according to your needs.


Finding suitable color coated coils needs to consider many aspects, like coating types, materials, colors. If you want some useful suggestions from the expert, please contact us on the Bestsuppliers platform.

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