In the field of CNC Milling machining, surface treatment technology plays a crucial role. It not only affects the appearance of the product, but also directly relates to the performance and durability of the product. The following is a detailed analysis of several common CNC Milling surface treatment technologies, aiming to provide you with comprehensive information to better understand and apply these technologies.
Type II anodizing is a widely used surface treatment technology for aluminum alloy parts. Through electrolysis, an oxide film is formed on the surface of aluminum, which effectively improves the corrosion resistance of the part. This technology is particularly popular in aerospace and electronic products.
- **Application Scenario**: Applicable to aircraft parts, electronic equipment shells, etc.
- **Features**: The oxide film has good adhesion and abrasion resistance, and a wide range of colors can be customized by adding dyes. However, it should be noted that Type II anodic oxidation coating may fade under direct sunlight for a long time.
Hard anodizing (Type III) has a thicker oxide film compared to Type II, resulting in greater abrasion and corrosion resistance. This treatment technology is suitable for applications requiring high abrasion resistance.
- **Application Scenario**: Suitable for automotive parts, medical devices, etc.
- **Features**: Although the color is slightly dull, it still supports RAL color card customization. The hard anodized layer can withstand higher physical and chemical wear.
Powder coating is an environmentally friendly and efficient surface treatment technique for a wide range of metal materials. It uses heat-cured coatings to provide a uniform, tough protective layer on parts.
- **Application Scenario**: Suitable for outdoor facilities, mechanical equipment, etc.
- **Features**: Powder coating finish is more durable than traditional spray paint and comes in a variety of color options. It can effectively resist UV rays, acid and alkali corrosion and other environmental factors.
Electrolytic polishing is an electrochemical process mainly used to improve the surface finish and corrosion resistance of metal parts. This technique is particularly suitable for materials such as stainless steel and titanium alloys.
- **Application Scenario**: Suitable for medical equipment, precision instruments, etc.
- **Features**: Electrolytic polishing removes microscopic defects from metal surfaces and improves finish. However, it should be noted that this process may have some effect on the size of the parts.
Passivation is a surface treatment technology used to improve the corrosion resistance of stainless steel. It effectively prevents corrosion by forming a colorless protective layer on the metal surface.
- **Application Scenario**: Suitable for kitchen equipment, medical equipment, etc.
- **Features**: Passivation removes surface burrs and improves corrosion resistance. However, it may cause small changes in size and surface roughness.
Electroless Nickel Plating
Electroless nickel plating is a process that forms a uniform nickel coating on metal surfaces and is suitable for metal parts of various complex shapes.
- **Application Scenario**: Suitable for electronic components, decorative parts, etc.
- **Features**: The nickel coating has good corrosion resistance and appearance brightness, but wear resistance is relatively low and may affect solderability.
Gold plating treatment is a process of plating a layer of gold on the metal surface, which has good corrosion resistance and conductivity.
- **Application Scenario**: Suitable for high end electronic connectors, jewelry, etc.
- **Features**: Gold plating provides excellent electrical conductivity and corrosion resistance, as well as a gold-like appearance, but at a higher cost.
Electro-galvanized/Hot-dip galvanized
Electro zinc plating and hot-dip galvanizing are two common rust prevention treatment techniques for steel products.
- **Application Scenario**: Suitable for building structures, fasteners, etc.
- **Features**: Zinc coating provides a physical barrier against rust. However, it may affect electrical conductivity and welding performance.
Blackening is a process that darkens the surface of ferrous materials, and is suitable for applications where reflection needs to be minimized.
- **Application Scenario**: Suitable for firearms parts, optical instruments, etc.
- **Features**: The black oxide coating is corrosion-resistant and does not affect part dimensions.
Metal heat treatment includes processes such as annealing, surface hardening (nitriding), tempering and quenching, which are used to improve the mechanical properties of metals.
- **Application Scenario**: It is applicable to a variety of metal parts, and the appropriate process is selected according to different performance requirements.
- **Features**: Annealing improves the cold working ability of the metal; surface hardening improves the hardness; tempering reduces the hardness and improves the toughness; quenching improves the overall hardness.
For customers with special needs, we offer personalized surface treatment programs. These programs are subject to review by a team of professional engineers and may require additional time to confirm feasibility.
- **Features**: Customized service can meet the needs of special application scenarios, but not all customized needs can be met.
To summarize, CNC Milling has a wide variety of surface treatment technologies, each of which has its own unique application scenarios and advantages. When choosing a surface treatment technology, it is necessary to fully consider the product's use environment, performance requirements and cost budget. By choosing and applying these technologies, you can effectively improve the quality and service life of your products to meet the needs of different industries. At Yetta Tech, a professional cnc machining company, we are committed to providing our customers with the highest quality surface treatment solutions to help our products stand out in the marketplace.
