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Painted Coil

June 24, 2022

Common seen painted coil are painted aluminum coil or steel, while aluminum painted coil has better performance and market response. Painted aluminum is also known as coated aluminum, prepainted aluminum, rolling coated aluminum, color coated aluminum and powder coated aluminum.

painted coil

Painting process of painted coil are:

The first step: aluminum coil formation

It works by pre-treating aluminium coils before roll coating. First, clean the layer of lubricating oil, anti-oxidation grease and various dirt attached to the surface of the aluminum coil during rolling to remove the precipitation of impurities such as silicon, magnesium and copper on the surface of the aluminum material. Then, some chemical raw materials are added, and the aluminum coil is chemically processed. It forms a honeycomb-shaped oxide film with a fine structure on its surface, which can make the paint and the aluminum coil closely combine with the aluminum coil when the aluminum coil is rolled, and has excellent adhesion.

Step 2: Coating and Baking

The formed aluminum coil passes through the painting room and is painted with the paint of the color specified by the customer. In the first stage, fine three-roller or four-roller reverse roller coating machine is used to carry out fine coating in a closed and dust-free condition to control the thickness and appearance quality of the coating; the second stage, baking, is divided into four furnace zones with different settings temperature to bake the painted aluminum coil. After high temperature baking, the molecules of the paint are linked and cured, so that the solvent resistance, hardness, flexibility and weather resistance of the coating can reach the ideal state. Coated aluminum coils have outstanding gloss, adhesion and corrosion resistance.


Haomei Aluminum has now become a painted coil processing enterprise with better quality and larger output in China. The painted aluminum coil produced by the company is highly valued by the industry. The company currently has 7 color-coated aluminum production lines, with an annual output of 50,000 tons, and continues to expand production capacity. With outstanding reputation, Haomei Aluminum has established a complete sales network and developed foreign markets such as Europe, America, Japan and South Korea, the Middle East and Southeast Asia.

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