How to surface treat aluminum sheet to increase its corrosion resistance?

As a material widely used in various industrial and commercial fields, the corrosion resistance of aluminum sheet is crucial to its service life and performance. In order to enhance the corrosion resistance of aluminum sheet, a variety of surface treatment methods are usually used.

One of the common surface treatment methods is anodizing. Anodizing improves the surface hardness and corrosion resistance by forming an oxide layer with a thickness of about 5-25 microns on the surface of aluminum. This oxide layer not only improves the weather resistance of aluminum sheet, but also can be dyed or sealed as needed to enhance its decorative and functional properties. This treatment method is widely used in aerospace, automotive, construction and other industries, providing a cost-effective protection and decoration technology.

Although aluminum itself is not easy to electroplate, it can be electroplated with nickel, chromium, zinc or other metals after chemical treatment to increase its surface corrosion resistance and decorative properties. The electroplating layer not only provides an additional protective layer, but also improves the appearance and hardness of the aluminum sheet, which is widely used in automotive parts, household appliances and other fields.

In addition, coating technology is also an effective surface treatment method that can form an organic or inorganic coating on the surface of aluminum sheet. Polyester coating (PE) and fluorocarbon coating (PVDF) are two common types of coatings that can not only improve the corrosion resistance of aluminum panels, but also improve their weather resistance and appearance. This method is commonly used in applications such as building exterior wall panels, billboards and home decorations that require long-term color and surface maintenance.