What are the surface treatments for Precision Sheet Metal Fabrication?

Precision sheet metal fabrication primarily involves the following surface treatment processes, which can significantly enhance a product's corrosion resistance, aesthetics, and functionality:

• Anodizing: This process uses electrolysis to create an oxide film on the surface of aluminum alloys (such as AL6061), enhancing wear resistance and decorative properties. Suitable for electronic device casings.
• Electroplating: Processes such as chromium (Cr) plating can improve the rust resistance of materials like 45# steel while also increasing surface finish and hardness.
• Electrophoretic Coating: Charged particles form a uniform coating under the action of an electric field, suitable for corrosion protection of complex geometries.

• Sandblasting: This process uses a high-speed stream of sand to clean or roughen the surface. This process is used to create the matte finish of iPhone metal casings.
• Polishing: This process uses mechanical or chemical methods to reduce roughness, achieving a mirror-like finish. Commonly used in medical devices and high-gloss components.
• Wire Brushing: This process creates decorative lines through grinding, highlighting the metallic texture. Widely used in consumer electronics.

• Powder Coating: Electrostatically adsorbs powder (such as ivory white and matte black) onto the metal surface. Suitable for SPCC cold-rolled steel, it offers a wide range of color options.
• PVD Vacuum Coating: Physical vapor deposition creates an ultra-thin metal film, combining aesthetics with wear resistance. Suitable for high-end tools and decorative parts.
• Painting: High-temperature curing liquid coating enhances rust resistance and is primarily used for outdoor equipment.

• Chemical Etching: Precisely engraves patterns using acid. Used for precision electronic components or logos.
• Micro-arc Oxidation: Creates a ceramic coating on the surface of aluminum alloys, enhancing heat resistance and insulation properties.

Different processes can be combined (e.g., brushing followed by anodizing). The specific choice should be based on a comprehensive assessment of the material (stainless steel/aluminum alloy) and the application (industrial/consumer electronics).