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Introduction of four methods for coloring aluminum profiles

Aluminum is a very active metal, and aluminum profiles with aluminum as the main component are also very easy to oxidize, but the oxide film naturally formed on the surface of aluminum profiles is uneven in texture and very thin, and the corrosion resistance is not very strong. Therefore, artificial oxidation treatment is an ideal choice. The aluminum profile forms a transparent and hard oxide film on the surface through electrochemical reaction. Of course, it can also be dyed into colorful colors, which is pleasing to the eye. Dyeing is carried out during the anodizing process. Let’s take a look at 4 ways to color the surface of aluminum profiles:

1. Organic dyeing

2. Inorganic dyeing

3. Electrolytic coloring

4. Electroplating coloring

Next, we mainly discuss the differences, advantages and disadvantages of organic dyeing and electrolytic dyeing, and what occasions are they suitable for?

1. The principle of organic dyeing is the adsorption of substances, which is divided into physical adsorption and chemical adsorption. The method of physical adsorption is: molecules or ions are electrostatically adsorbed on the surface of aluminum profiles, and the method of chemical adsorption is: adsorption by chemical force. The combination of the two is organic dyeing, which usually requires a certain temperature environment. After the anodized film is formed, there are fine pores on the surface, which are very easy to absorb coloring substances. After coloring, the color can be fixed by sealing the pores. Organic dyeing is suitable for various materials used indoors, industrial aluminum profiles, decorative aluminum profiles, aluminum daily necessities, etc. The advantage of organic dyeing is that it is colorful and diverse to meet various aesthetic needs.

2. Electrolytic coloring is based on an additional coloring process in the natural anodizing process. After the aluminum material is electrolyzed to form an oxide film with dense pores, the aluminum material is placed in a metal salt solution for secondary electrolysis, so that the metal salt ions are firmly It is adsorbed in the pores to form the color of metal salt ions. The color tone of electrolytic coloring is relatively monotonous, mainly black, bronze, golden yellow, jujube red, etc., and the color difference is not well controlled. Electrolytic coloring is mainly used for outdoor architectural aluminum profiles, photovoltaic aluminum profiles, etc. Its advantages are that its weather resistance, light resistance and service life are higher than those of organic dyeing materials.

aluminum profiles


Post time: Apr-25-2022