Surface Treatment Process: The Core Technology to Enhance the Performance of Aluminum Materials

In the application field of aluminum materials, surface treatment processes are not only a sublimation of aesthetics but also the key to performance enhancement. Through a series of professional techniques, these processes significantly improve the corrosion resistance, aesthetics, and functionality of aluminum materials, meeting diverse usage requirements. Below, we introduce three mainstream surface treatment processes for aluminum materials and their outstanding features in detail.

The Essence of the Process: Making Metal "Flow" into Desired Forms

The core principle of extrusion lies in leveraging aluminum’s "dough-like plasticity" at 450–550°C—a state where the billet loses its room-temperature rigidity but gains the ability to flow and deform. The extrusion press acts as an "industrial sculptor," using thousands of tons of pressure (500 tons for small presses, over 5,000 tons for large ones) to "squeeze" the billet through a die hole, causing it to solidify into the die’s cross-sectional shape. The result? Complex forms like tubes (window frames), custom profiles (car crash beams), and sheets (electronics heat sinks).

Anodizing: An Indestructible Protective Armor
Anodizing is a surface treatment technology achieved through electrochemical methods. This process forms an oxide film with a thickness of 10-25μm on the surface of aluminum materials. The hardness of this film is astonishing, reaching Mohs hardness level 9, comparable to natural sapphire, effectively resisting external scratches and abrasions. In terms of corrosion resistance, aluminum materials treated with anodizing can withstand salt spray corrosion for more than 6000 hours, enabling long-term use in harsh environments such as humid and high-salt areas and greatly extending the service life of products. In addition, the anodizing process supports dyeing, which can endow aluminum materials with various textures such as matte or glossy finishes, providing rich aesthetic options for architectural decoration, high-end furniture, and other fields.
Powder Coating: An Aesthetic Guarantee with Long-lasting Colors
Powder coating uses the principle of electrostatic adsorption to evenly adhere powder coatings to the surface of aluminum materials, and then forms a 50-100μm thick coating through high-temperature curing. This process has passed the strict ASTM D7869 test and performs excellently in terms of weather resistance and abrasion resistance. Its color fastness exceeds 20 years, remaining bright and new even after long-term exposure to sunlight and rain. Powder coating offers a wide range of colors and textures. Whether it's a low-key and luxurious metallic texture or a vibrant and bright color scheme, it can be perfectly presented. It is widely used in architectural decoration fields such as doors, windows, and Curtain Walls, combining practicality and aesthetics.

Electrophoretic Coating: A Precise and Uniform Protective Barrier
Electrophoretic coating uses the force of an electric field to evenly deposit water-soluble coatings on the surface of aluminum materials, forming a transparent or colored protective film with strong adhesion and uniform thickness. The advantage of this process lies in its high uniformity and excellent protective effect, which can penetrate into every detail of complex structures to ensure comprehensive protection. The electrophoretic coating not only has good corrosion resistance but also effectively improves the anti-fouling performance of the aluminum material surface, making it easy to clean and maintain. It is suitable for fields with extremely high requirements for surface quality, such as automotive parts and high-end kitchen and bathroom products.​
Whether you are seeking ultimate durability, rich visual effects, or strict requirements for surface quality, we YAOXING ALUMINUM, can provide you with professional surface treatment solutions. Choosing our aluminum products means choosing excellent quality and unlimited possibilities.