We are a factory who specializes in an array of technical services, including anodizing, hard anodizing, and colored anodizing for aluminum products. Additionally, we offer comprehensive processing solutions such as welding, CNC machining, forging, and casting. 

Aluminum parts surface treatment Metal Red anodizing Process Electrochemical Process

Red anodizing is achieved by using a combination of nickel acetate and red dye. It is important to note that the color achieved during the anodizing process can vary depending on factors such as the thickness of the anodized layer, the type of dye used, and the specific process parameters.

The anodizing process is a reputable method for aluminum or other materials. Because it can produce durable and beautiful products. Anodizing colors are important because they largely reflect the characteristics of the final product.

What is anodized aluminum?

Anodized aluminum is aluminum that has been electrochemically treated to form a tough, protective oxide layer. The process involves immersing the aluminum in an electrolyte and then passing electricity through it, which makes the surface harder and more corrosion-resistant—about two to three times harder than regular aluminum.

Because the anodized layer is bonded to the aluminum, it will not chip, flake, or peel like other coatings. This makes it ideal for applications where appearance and durability are important, such as construction, automotive parts, and consumer products. In addition, the porous surface is easily dyed, so a variety of colors and finishes are possible.

Aluminum anodizing is an electrochemical process that coats the surface of aluminum products with a wear-resistant oxide layer. As a result, the product has properties that enhance quality and aesthetics. For example, they are durable, wear-resistant, and corrosion-resistant. They also have this beautiful feel that meets the aesthetic requirements of most users.

Anodizing is an electrochemical cell reaction in which the aluminum part acts as the anode, the cathode is an inert material, and the acid electrolyte is the anode. The following are the electrochemical reactions on the electrodes:

Anode: 2Al + 3H2O = Aluminum 2O3 + 6H+ + 6e-

Cathode: 6H+ + 6e- = 3H2

Resulting anodic oxidation reaction: 2Al + 3H2O = Aluminum 2O3 + 3H2

Types of Anodizing Processes

There are three types of anodizing processes, each of which differs in terms of coating strength. The difference lies in the electrodes, electrolytes, and energy used in each process.

Type 1 Anodizing Process

Type 1 anodizing process is also called the "light" type, and it involves the use of chromic acid as the electrolyte and the aluminum part as the anode. When an electric current passes through the electrolyte, the positive particles of the anode are ejected, forming tiny grooves on the surface. The microscopic grooves are then oxidized to form an oxide layer. Products made through this process have better heat and corrosion resistance than regular aluminum products without a finish.

Type 2 Anodizing Process

The Type 2 anodizing process uses sulfuric acid instead of chromic acid. Sulfuric acid is more efficient, resulting in better positive aluminum particle blasting than seen in Type 1. As a result, the microscopic grooves formed are deeper and the oxide layer is thicker. These two characteristics are why Type 2 aluminum parts exhibit better paint retention characteristics.

Type 3 Anodizing Process

The Type 3 anodizing process is ideal for manufacturing heavy-duty aluminum products. Unlike other types of anodizing processes, it uses higher voltages and a strong acid (sulfuric acid).

Advantages

Coloring anodized aluminum enhances its beauty and provides practical advantages.

Beauty: Coloring anodized aluminum to obtain a variety of colors can produce an aesthetically pleasing product that stands out in the market. Colors can be adjusted based on brand requirements or design guidelines.

Durable: As part of the aluminum, rather than just a top coating, the colored anodized layer is less susceptible to chipping, fading, and wear. This means that the product will look good for a long time, even under extreme conditions.

Functional benefits: The use of color may include component tracking in industrial areas or safety areas, where visualization has advantages.

Environmentally friendly: Unlike typical paint or powder coating, the anodizing process does not involve any harmful chemicals. The dyes are generally non-toxic and sustainable.

Anodizing is a very important electrolytic process surface treatment, used to improve the surface treatment process in terms of aesthetics, optical relevance, etc. How the anodizing process colors aluminum parts and plays a huge role in color matching. Although the anodizing process may seem complicated. But get the best results in terms of quality and low cost.