Types of Color Coated Steel Coil

1. Color Cold Rolled Steel Coil

The color-coated coil, with cold-rolled steel as its base metal, has a smooth and attractive appearance. And it maintains the processing performance of cold-rolled steel. However, cold-rolled steel is prone to rusting when there are any minor scratches on the surface. Hence, color cold-rolled steel products are only recommended for indoor applications with low requirements.

2. Prepainted Galvanized Steel Coil (PPGI Coil)

The most popular type of color-coated steel uses galvanized steel as its base metal, including both hot-dip galvanized sheets and electro-galvanized sheets. Hot-dip galvanized steel is particularly favored as a base material. These prepainted galvanized steel coils are protected from rusting by a layer of zinc and organic coatings. Hence, its service life is longer than that of the hot-dip galvanized sheet. Despite this, due to their smooth surface and attractive appearance, they are widely used for interior decoration, steel furniture, home appliances, and other similar applications. The zinc thickness of the hot-dip galvanized substrate ranges from 30 g/㎡ (double-sided) to 275 g/㎡. You can choose according to the use environments.

3. Electro-galvanized Color-coated Steel

Color coated steel is also made using electro-galvanized sheets as the substrate. However, the zinc layer on the electro-galvanized sheet is typically thin, with a range of 10-30 g/㎡, making it unsuitable for use in exterior wall or roof panels. Despite this limitation, electro-galvanized color coated steel is valued for its attractive appearance and outstanding processing performance, making it a popular choice for home appliances, steel furniture, interior decoration, and other applications.

4. Colour Coated Galvalume Coil (PPGL Coil)

You can also find color coated steel coil with galvalume steel (55% Al-Zn alloy coating) as metal, that is, PPGL coil. Galvalume coil has superior corrosion resistance, as well as excellent adhesion and flexibility. So it is widely used in home appliances, construction, etc.

Popular Colors of Color Coated Steel Coil

According to our sales data, the hot-selling colors for pre-painted coil include cement grey (RAL 7033), signal blue (RAL 5005), traffic red (RAL 3020), moss green (RAL 6005), colza yellow (RAL 1021), wine red (RAL 3005), etc. While pattern coils are very popular for ceiling, door, or interior decoration. It all depends on your needs and preference. If you want other colors or patterns, please contact us for a custom design.

Applications of Color Coated Steel Coil

Pre-painted steel coils can be slit, sheared, and profiled for different uses, for example,
1. Construction uses, for example, walls and roofs of public buildings, workshops, prefabricated houses, integrated houses, door panels, window frames, ceilings, partitioning walls, roller shutters, guard gates, etc.
2. Transportation industry, such as decorative panels of cars, bodies of trains or ships, containers, back panels, hoardings, tractors, ship compartments, etc.
3. Home Appliances, are mainly used to make side or back panels or shells of refrigerators, washing machines, air conditioners, electric stoves, etc. 
4. Steel Furniture, like wardrobes, lockers, radiators, lampshades, tables, beds, bookcases, shelves, etc.
5. Other Industries, such as advertising boards, traffic signboards, elevators, whiteboards, etc.
Considering its flexible uses and good formability, it is profitable to invest in pre-painted steel coils.

Why Purchase Pre-painted Steel Coils?

As an emerging material, colour coated sheet is very popular in our life. But it is a kind of material, which makes it a great investment project. Let’s review its features.

1. Easy to Transport & Cheap Price

Compared to color coated steel sheets, coils are easier to transport. In this way, it will save your shipping cost. Besides, the color coated steel coil price is cheaper.

2. Wide Applications

As a kind of material, the color coated coil has features like light in weight, beautiful appearance, and good processability. That’s why it is popular in many areas. Its wide usage and cheap price make it promising to invest in.

3. Easy Processing

Due to the good formality, it is easy to shear, or shape the color steel coils according to different applications. You may just need less equipment and simple operation. While it is cheaper than end products. For large projects, it will greatly lower your investment cost.

4. Less Maintenance

Because of its excellent corrosion resistance of galvanized steel or galvalume steel, prepainted steel coil and products made of color-coated steel require less maintenance. For investors, you will never worry about after-sales problems. While for users, it is a cost-effective choice.

5. Friendly to the Environment

Colour coated sheet coil is good for the environment. For example, there is no need to undermine if using color coated steel as building materials, which is good for the environment. Even the used color coated steel can be reused.

Prepainted Steel Coating Process

The coating process is the process by which a steel coil is coated continuously. The steel coil will go through uncoiling, welding, press rolling, inlet looping, pre-treatment (including chemical degreasing and chemical conversion), primer coating, drying, cooling, finish coating, drying, cooling, outlet looping, and coiling. Below is a flow chart for your reference.

Through the coating process, both sides of the steel coil are coated twice. Generally, the back coating thickness is 5-14 μm and the top one is 11-35 μm, which can be customized according to your needs. Below is a picture showing the coating structure.

How to Choose Prepainted Steel Coil?

1. Take the use environment into account

The first thing is to take the corrosion of the use environment into consideration, such as the snow load capacity, corrosive factors, etc. It matters how to choose the substrate, thickness, coating, paint structure, etc. So inform us where and what you will use the color coated coil for, and our professional sales team will offer suitable options.

2. Pay more attention to product quality

There are many color-coated steel coils on the market. Some are very cheap. But you need to pay more attention to the quality rather than the price. If possible, you can ask for samples for reference or visit the factory on-site.

3. Take your budget into consideration

You need to make the best choice according to your budget. For the other thing, it is important to compare the price to get the most cost-effective solution. Welcome to contact us for a price list!

4. Cooperate with the company with great service

Service is also very important. You need to choose the pre-painted steel coil suppliers who offer great service, such as product warranty, after-sales system, etc. Taking Wanzhi Steel for example, we have a full service system with professional engineers and multilingual consultants to serve you 24*7 hours a week.