Surface treatment after aluminum alloy CNC machining is an important step to improve product performance and appearance. Different surface treatment technologies can give aluminum alloys different characteristics to meet various application requirements
The main surface treatment technologies include:
Anodizing: This is the most commonly used surface treatment method for aluminum alloys. It increases the wear resistance and corrosion resistance of aluminum through electrochemical methods and provides a variety of color options. The anodized film layer is thicker and can effectively extend the service life of aluminum alloys
Sandblasting: Remove burrs and oxide layers on the surface by high-speed sand jetting to make the surface smoother and enhance the adhesion of the coating
Electroplating: Deposit a layer of metal such as nickel or chromium on the surface of aluminum alloy to enhance its wear resistance and corrosion resistance while providing good conductivity or weldability
Chemical conversion coating: Use chemical solutions to treat the surface of aluminum alloys to form a protective layer to improve corrosion resistance and paint adhesion
Powder coating: Powder coating is applied to the surface of aluminum alloy and then heated and fused into a protective layer, providing corrosion resistance, impact resistance, and a variety of colors are available.
Polishing: Remove surface defects by mechanical or chemical methods to improve the gloss and smoothness of aluminum alloy.
Wire drawing: Create linear textures on the surface of aluminum alloy, providing unique visual effects and feel.
High-gloss cutting: Cut parts through high-speed rotating diamond tools to produce local highlight areas to enhance the visual effect of the product.
PVDF coating: Provides corrosion resistance, anti-fading and chemical resistance, suitable for outdoor applications.
Factors to consider when choosing a surface treatment method:
The application environment of the product: For example, outdoor applications may require stronger corrosion resistance.
Aesthetic requirements: Some products may require specific colors or gloss.
Cost-effectiveness: Different surface treatment technologies have significant cost differences.
Environmental impact: Choose environmentally friendly surface treatment technologies.
Durability and wear resistance: Choose according to the frequency and conditions of product use.
By selecting the appropriate surface treatment technology, the performance and appearance of aluminum alloy CNC machined parts can be significantly improved to meet the needs of specific applications.
