Explanation of different material surface treatment technologies in CNC machining
5 min
I. Introduction
In the process of CNC machining, surface treatment technology is crucial. It not only affects the appearance quality of the part, but also directly relates to the performance and durability of the part. Whether it is to improve corrosion resistance or enhance the wear resistance of parts, surface treatment plays a key role in the whole manufacturing process. Through the appropriate surface treatment technology, you can significantly improve the service life of the product and work efficiency. This article will provide an in-depth analysis of CNC machining in the common surface treatment technology, and introduces how to choose the surface treatment method suitable for different materials and application requirements.
II. CNC machining in the common surface treatment technology
Anodizing
Applicable materials: aluminium alloy, titanium alloy
Function: Anodizing forms a dense oxide film on the metal surface through electrolysis process to increase corrosion resistance and hardness and improve appearance.
Applicable Scenarios: Widely used in aerospace, automotive manufacturing and electronics industries, especially in scenarios where parts are required to have excellent corrosion resistance and good appearance.
Bead blasting
Applicable materials: metals and plastics
Function: Bead blasting cleans up surface dirt by spraying abrasives, improves surface adhesion and roughness, and increases the adhesion of coatings.
Applicable Scenarios: Commonly used for surfaces that require non-slip or decorative finishes, such as electronic housings, automotive parts and construction materials.
Nickel and chrome plating
Applicable materials: steel, aluminium
Function: Nickel and chrome plating can provide metal surfaces with additional wear resistance, corrosion resistance and glossy appearance, and enhance the oxidation resistance of parts.
Application Scenario: Widely used in automotive manufacturing, mechanical parts and electronic products, especially where enhanced appearance and longer service life are required.
Electrolytic Polishing
Applicable materials: stainless steel, aluminium
Function: Electrolytic polishing removes small particles on the surface of the material through electrolysis, making the surface smooth and bright and reducing corrosion.
Applicable Scenario: Especially suitable for food processing, medical equipment and other fields, requiring parts with high gloss and corrosion resistance.
Coating treatment
Applicable materials: metal, plastic
Function: Coating treatment usually refers to the application of protective coatings to metal or plastic surfaces to improve the wear resistance, high temperature resistance and corrosion resistance of parts.
Scenario: Widely used in aerospace, automotive industry, electronic products and other fields, especially the parts are required to withstand high temperatures and strong corrosive environment for a long time.
III. Surface treatment requirements of different materials
Surface treatment requirements of metal materials
Steel: The surface of steel usually needs to be nickel-plated, chromium-plated or sandblasted to enhance its wear resistance and corrosion resistance. For stainless steel, electrolytic polishing can also be carried out to enhance its gloss.
Aluminium alloy: The surface treatment of aluminium alloy mostly adopts Anodizing, which not only enhances its oxidation resistance, but also increases the surface hardness and improves its appearance.
Titanium alloys: Titanium alloys are usually anodised to improve their surface hardness and corrosion resistance, and are commonly used in high-tech fields such as aerospace.
Surface Finishing Needs for Plastic Materials
Nylon: Nylon typically requires Bead blasting or coating to improve surface hardness and abrasion resistance, and is used in applications requiring high mechanical strength.
Polycarbonate: Polycarbonate materials can be coated to improve their UV, heat and impact resistance for outdoor or high-intensity use.
PVC: PVC materials usually need to be sprayed, heat treatment and other methods to enhance their surface properties, especially chemical resistance and anti-aging.
IV. How to choose the appropriate surface treatment technology
Choose according to the application scenario
For parts requiring enhanced corrosion resistance, anodising and nickel-chromium plating are ideal. For parts that require an aesthetic and lustrous surface, electrolytic polishing or coating treatment is available.
In some high-performance areas, such as the aerospace, automotive or medical industries, surface treatments must not only fulfil corrosion resistance, but also take into account the strength, stability and appearance of the material.
Selection according to material properties
For different materials (e.g. metals, plastics, alloys), it is crucial to choose a surface treatment that is compatible with them. For aluminium alloys, anodising is more common, while for plastics, Bead blasting and coating are more appropriate.
Balancing Cost and Effectiveness
The cost of various surface treatment technologies varies greatly, so companies need to choose according to their project budget and needs. For example, anodising provides good corrosion resistance but is more costly, while Bead blasting is a lower cost option with significant results.
V. Advantages of JLCCNC's surface treatment technology
High quality machining and surface treatment
JLCCNC provides high quality CNC machining services to ensure that the surface treatment of parts and processing of high-high quality requirements to ensure that the final product meets the quality standards of customers.
Wide range of material selection and processing technology
JLCCNC has a wide range of material selection and surface treatment technology, and can provide customers with personalised machining solutions for aluminium alloy, stainless steel, plastics and other materials to meet the needs of different industries.
Fast Delivery and Quality Assurance
JLCCNC's CNC machining services start from as little as $1 and can be delivered in as little as 3 days, ensuring that customers get the customised parts they need efficiently.
Customised Service and Technical Support
JLCCNC provides customers with full technical support to help them choose the most appropriate surface treatment solution for their specific needs, ensuring the successful completion of each machining project.
VI. Conclusion
Surface treatment technology in the CNC machining process is of great significance, it can not only improve the appearance of the quality of the part, but also significantly enhance its durability and performance. By choosing the right surface treatment technology, companies can optimise the cost-effectiveness of their parts while meeting functional requirements. jlccnc, with its rich technical experience and efficient production capacity, is able to provide customers with precise machining and surface treatment solutions to ensure that every product meets the expected quality standards.
Popular Articles
• How to choose between Laser marking and UV printing?
• Anodizing vs. Hard Anodizing: The Differences in Surface Treatment Techniques
• What is Bead Blasting Finish in CNC? A Complete Guide
• Surface Finish in Machining, Types, Charts & Testing
• Explanation of different material surface treatment technologies in CNC machining
Keep Learning
How to Anodize Aluminum: Complete DIY & CNC Manufacturing Guide
Key Takeaways Anodizing grows an oxide layer from the aluminum itself instead of adding a separate coating on top. Type II anodizing is commonly chosen for appearance-focused parts, while Type III hardcoat anodizing is used more often on sliding or wear-prone components. Surface condition before anodizing still shows afterward. Tool marks, scratches, bead blasting, and polishing all remain visible. Hole sizes, thread fit, and sliding clearances can change after anodizing because the oxide layer grows ......
Sulfuric Acid Anodizing for Aluminum in CNC Manufacturing
Key Takeaways About Sulfuric Acid Anodizing Sulfuric acid anodizing is the most widely used anodizing process for CNC-machined aluminum parts. The process creates an integral oxide layer that improves corrosion resistance, wear resistance, and surface appearance. Coating thickness affects both performance and dimensional growth, making tolerance planning important for precision components. Aluminum alloy selection influences anodizing quality, color consistency, and final surface appearance. Type II s......
Abrasive Blasting Process for CNC Machined Components: Technical Best Practices
Key Takeaways Abrasive blasting propels media at metal surfaces to clean, texture, or prep them, the process changes depending almost entirely on what media you use and how hard you throw it. Industrial abrasive blasting isn't one process, sandblasting, bead blasting, shot blasting, grit blasting all use the same principle and produce completely different surface conditions. In most applications, media selection has a greater influence on the final surface condition than blasting pressure or nozzle co......
Metal Polishing Process for CNC Machined Parts and Surface Finishing
Key Takeaways Metal polishing is a surface finishing process that improves the smoothness, appearance, and functional properties of CNC machined metal parts through progressive abrasive material removal. The metal polishing process removes surface peaks, tool marks, and micro-defects to produce surfaces ranging from matte satin to mirror finish. CNC metal polishing removes material and can affect part dimensions, so it must be accounted for on close-tolerance features. Different metals respond differe......
Electropolishing Explained: Process, Surface Finish, and Stainless Steel Applications
Key Takeaways Electropolishing is an electrochemical process that removes material from metal surfaces by anodic dissolution, preferentially attacking microscopic surface peaks to produce a smoother, brighter, and more corrosion-resistant surface. Stainless steel electropolishing is the most common industrial application, used in medical, pharmaceutical, food processing, and aerospace manufacturing. A properly controlled electropolishing process can often reduce Ra surface roughness by around 30-50% o......
Vibratory Finishing for CNC Parts: Process, Media, and Deburring Methods
Key Takeaways Vibratory finishing is a batch surface treatment process that uses vibrating abrasive media to deburr, smooth, and polish CNC machined parts simultaneously. The vibratory finishing process works on large batches without operator attention during the cycle. Media selection is the primary variable controlling whether you get aggressive deburring, surface smoothing, or high-shine vibratory polishing. Vibratory deburring removes burrs and sharp edges consistently across complex geometries th......