Electrophoresis Aluminum Extrusion Profile

Electrophoresis, a widely used surface treatment process, involves the application of electrophoretic paint to the cathode and anode. This process utilizes the movement of charged paint ions under the influence of voltage to create a uniform and durable coating on the surface of the workpiece. The processing of electrophoretic surface treatment consists of four processes: electrolysis, electrophoresis, electrodeposition, and electroosmosis.

(1) Electrolysis (decomposition)

The reaction at the cathode is initially an electrolytic reaction, generating hydrogen and hydroxide ions OH, which results in the formation of a highly alkaline boundary layer on the cathode surface. When the cation reacts with hydroxide to form an insoluble substance, the film is deposited, and the equation is: H2O→OH+H

(2) electrophoretic movement (swimming movement, migration)

Under the action of the electric field, the cationic resin and H+ move toward the cathode, while the anion moves toward the anode.

(3) Electrodeposition (precipitation)

On the surface of the coated workpiece, the cationic resin interacts with the surface of the cathode alkaline, neutralizes and precipitates without deposits, and deposits on the coated workpiece.

(4) Electroosmosis (dehydration)

The coating film on the surface of the paint is solid and the workpiece is semi-transparent, with most pores, water is seeped out from the cathode coating film, under the action of the electric field, causing the coating film to dehydrate, and the coating film is absorbed on the surface of the workpiece, and the entire electrophoresis process is completed.

The electrophoretic paint film offers numerous advantages, including a full, uniform, flat, and smooth coating. Additionally, the hardness, adhesion, corrosion resistance, impact performance, and penetration performance of the electrophoretic paint film are significantly superior to those of other coating processes. This makes electrophoretic surface treatment an attractive option for a wide range of applications.

However, the process also has its limitations. One of the major drawbacks of electrophoretic surface treatment is the relatively limited color options available. The color range for electrophoretic coatings is relatively narrow, with only a few options such as silver white, champagne, golden, black, and imitation stainless steel. This limitation may restrict the aesthetic choices for certain applications, posing a challenge for designers and manufacturers.

Despite this drawback, the advantages of the electrophoretic surface treatment process make it a popular choice for industries where high-quality, durable coatings are essential. The ability to achieve a uniform and long-lasting coating with superior performance characteristics makes electrophoretic surface treatment a valuable technique in various sectors, including automotive, aerospace, and industrial manufacturing.

In conclusion, the electrophoretic surface treatment process offers a revolutionary approach to achieving high-quality coatings with exceptional performance characteristics. While the limited color options may present a challenge in certain applications, the overall benefits of electrophoretic surface treatment make it a compelling choice for industries seeking superior surface finishing solutions.