Ruixing MFG - Custom CNC Machined Parts Manufacturer & Supplier For 18 Years

Surface Treatment
Explore our Surface Treatment section to delve into the realm of enhancing material properties. From corrosion resistance to aesthetic appeal, discover how expertly applied surface treatments elevate the performance and longevity of various materials. Uncover the latest techniques, applications, and benefits, ensuring your components meet the highest standards in quality and durability.
Surface Finishes for cnc machining parts

The target market of our brand has been continuously developed over the years. Now, we want to expand the international market and confidently push our brand to the world.

As turning machined
Our standard CNC turning surface roughness: Aluminum and plastic parts can get Ra0.8-1.6 um, Brass, stainless steel, steel and titanium alloy parts can get Ra1.6-3.2um.If you have higher inquiry in some place, We can do Ra0.4um perfect surface by use diamond blade.
As milling machined
Our standard CNC milling surface roughness: Aluminum and plastic parts can get Ra1.6 um, Brass, stainless steel, steel and titanium alloy parts can get Ra1.6-3.2um. If you have higher inquiry. need add other process to get better surface.
Polishing / Mirror polishing (Ra0.8um / Ra32uinch)
In order to obtain a bright and flat surface, usually use mechanical polishing and electro-polishing to reduce the surface roughness of a workpiece. Polishing can not improve the dimensional or geometric accuracy of the workpiece, but can get a smooth surface or mirror gloss surface.
Grinding / Lapping(Ra0.025-0.63um / Ra1.0-25uinch)
For metal and plastic parts, we use grinding / lapping to get perfect surface and precision dimension. It is suitable for flat surfaces, inner holes, outer cylindrical surfaces, and conical surfaces. The machining accuracy can reach IT5~01, and the surface roughness can reach Ra0.025-0.63um
Sandblasted (Bead blasted)
In order to reduce machining marks and get good surface, Parts can be sandblasted or bead blasted with 80#,100#,120#,150#,180# glass beads as inquirement.
In order to reduce machining marks and get consistent beautiful surface, Parts can be brushed with 320#,480#,600# grit sandpaper as inquirement.
Anodized (MIL-A-8625 type I and type II)
Usually anodized thickness is from 5um to 15um. Can be anodized clear / natural, color, black, Also do sand blast, brush, polish before anodizing as inquirement. Hardness is HV250--350.
Hard anodized (MIL-A-8625 type III )
Hard anodized thickness is from 35um to 70um. It can enhance wear resistance and corrosion resistance of aluminum parts. Hardness is HV350--550.
CNC steel and brass parts are usually done by electroplated to prevent rust and corrosion. Include zinc plated, black zinc plated, nickel plated, chrome plated, gold plated, silver plated, etc.
PVD coating
CNC stainless steel and brass copper parts can be done by PVD coating to get best quality surface than electroplating. Also add polish process before PVD coating to remove machining marks and let parts glossy or matte gloss beautiful surface.
Powder coating
Powder coating is suitable for all metal parts. Glossy or matte gloss surface are available as inquirement. Powder coating is achieved by using compressed air to disperse powder into mist particles and absorbing them onto the metal surface under high-pressure electrostatic action. Coating thickness is usually 0.05-0.1mm. For some precision dimensions, We need avoid coating or machining after coating.
Teflon Coating(PTFE coating)
Teflon coating can greatly enhance the heat and chemical resistance of products, also providing excellent insulation stability and self-lubrication. It is used in many industries such as molds, food, medical equipment, automobiles, sensors, etc.
Electroplated nickel plating/ chemical nickel plating
Electroless nickel plating is the process of immersing a workpiece in a solution containing nickel ions, and then through a chemical reaction, the nickel ions are reduced to metallic nickel, which is deposited on the metal surface to form a uniform, dense, and corrosion-resistant nickel alloy layer. It is widely used in fields such as automobiles, aviation, aerospace, electronics, and machinery, etc. Chemical nickel plating: The coating is more uniform and dense, with better corrosion resistance than electroplated nickel, and is not limited by the shape of the workpiece, Electroplating nickel: Protective and decorative coating, relatively lacking uniformity, with some inner holes and grooves unevenly plated, is limited by the shape of the workpiece
Black oxide / Burnish / blackening
Blackening or black oxide, burnish is a common method of chemical surface treatment, which produce an oxide film on the steel part surface to achieve rust prevention. It is used on not high requirement of surface finishes. The quality of blackening mainly depends on the quality of rust and oil removal, as well as the passivation and oil immersion process after blackening
Passivation / SurTec 650 / Plating chemical film / Chromate Conversion Coating
Passivation and SurTec 650 is the process of producing a protective passivation film to protect metal surfaces, thereby enhancing their oxidation and corrosion resistance. Passivation is usually used on stainless steel CNC parts and brass CNC parts. SurTec 650 us used for aluminum CNC parts. Plating chemical film is the process of Chrome nitrate coating on aluminum parts. Natural and yellow are available.
Electropolish is a surface brightening treatment for stainless steel parts. Stainless steel parts is used as the anode and insoluble metal is used as the cathode. The two electrodes are putted in the electrolytic tank and subjected to direct current to produce selective anodic dissolution. The surface of the workpiece is gradually leveled, a passivation layer will be formed on the surface, removing burrs, improving the corrosion resistance and fingerprint resistance of stainless steel parts, and increasing brightness. Make the stainless steel parts more beautiful.
Phosphating is a surface treatment process that involves the chemical conversion of a metal surface to form a protective phosphate coating. This process is commonly applied to enhance the corrosion resistance, hardness, and lubricity of metal components.
Paint Fill
Paint fill enhances engraved surfaces by applying paint or enamel for a visually appealing appearance. Steps include surface preparation, paint selection, application, curing, and quality inspection. Widely used in industrial marking and personalized products, it improves visibility, allows customization, and adds durability.
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Some blogs about surface treatment

Learn more about surface treatment explanations
What surface treatments can be done on CNC machined copper parts?
With a surge in demand for CNC machined pure copper components, the exploration of surface treatments has become paramount. These treatments not only enhance the visual appeal of copper but also elevate its functionality.
2024 01 29
What surface treatments can be applied to CNC machined stainless steel parts?
In the realm of CNC machining, surface treatments play a pivotal role in enhancing the durability, corrosion resistance, and aesthetic appeal of stainless steel parts.
2024 01 25
Exploring the Pros and Cons of CNC Machining Aluminum Parts with Hard Anodizing
Hard anodizing is a specialized electrochemical process that enhances the surface properties of aluminum components. As a CNC machining facility focused on custom OEM services, understanding the nuanced aspects of hard anodizing is crucial for informed decision-making in material selection and finishing processes.
2024 01 22
The influence of anodizing on the glossiness and thickness of CNC machined aluminum parts
Aluminum, known for its versatility and lightweight properties, is a widely used material in the CNC machining industry. To enhance both aesthetics and durability, manufacturers often turn to anodizing processes.
2024 01 11
Comparing Electroplated Nickel Plating vs. Chemical Nickel Plating - Custom CNC Machining Service
In the world of surface treatments, electroplated nickel plating and chemical nickel plating stand out as two prominent methods, each with its own set of characteristics and applications. Understanding the differences between these processes is crucial for making informed decisions in various industries.
2024 01 15
How to apply color markings on CNC machining stainless steel parts?
In the realm of CNC machining, stainless steel parts often require color markings for various reasons, ranging from identification to aesthetic considerations. This comprehensive guide delves into the methods, considerations, and applications of applying color markings on CNC-machined stainless steel components.
2024 01 04
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Display of some CNC machining parts
Quality Showcase of Surface Treatment for CNC Machined Parts
CNC machining aluminum parts with powder coating
To elevate both functionality and aesthetics, our aluminum parts undergo a specialized powder coating process. This not only provides a durable and corrosion-resistant finish but also opens the door to a spectrum of color options, allowing customization according to specific project requirements.
CNC Machining Service for 316 Stainless Steel with Chrome Plating
Our CNC machining service offers unparalleled precision for manufacturing 316 stainless steel components with chrome plating. Specializing in OEM solutions, we ensure top-notch quality and accuracy in every custom part we produce.
Precision CNC Turning Ti 6AL-4V Titanium Service With PVD Coating For Custom Parts
Our precision CNC turning services offer unparalleled expertise in crafting Ti 6AL-4V titanium parts with the added advantage of PVD coating. We specialize in delivering high-quality, custom OEM solutions for diverse industries.
CNC machined hard anodized 7075 aluminum parts
Our custom CNC machined hard anodized 7075 aluminum parts are precision-engineered components designed to deliver exceptional performance and durability.
Custom CNC machined CuA1 copper parts with silver plating
CNC machining meets precision in our custom CuA1 copper parts with silver plating. Crafted with meticulous attention to detail, our OEM services offer tailored solutions for diverse industries.
Custom CNC machined 304 stainless steel M5 Square Screw with PVD coating
Precision in every detail defines our custom CNC machined 304 stainless steel M5 Square Screw with PVD coating. Tailored to your specifications, our OEM CNC machining services guarantee the high standards in quality and functionality.
Custom 45# carbon steel Wire EDM gears
In the realm of CNC machining, our Custom 45# carbon steel Wire EDM gears stand as a testament to precision and reliability. Crafted from robust 45# carbon steel, these gears are meticulously shaped through the wire-cutting process, ensuring unparalleled accuracy and durability.
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Surface Treatment Process in CNC Machining: Elevating Precision and Durability

In the realm of CNC machining, the significance of surface treatment process cannot be overstated.
It not only enhances the aesthetics but also plays a crucial role in improving the durability
and functionality of metal and plastic components. Let's delve into the fundamentals of surface treatment
and explore its applications in CNC machining.

Introduction to Surface Treatment:

surface treatment processes involve a meticulous series of techniques applied to the exteriors of metal components. The primary objective is to enhance their characteristics, functionality, and aesthetic appeal. This methodical approach is indispensable for ensuring the longevity and performance of machined metal parts.

Metal Surface Treatment in CNC Machining:

1. Anodizing:

This process forms a protective oxide layer on metal surfaces, providing corrosion resistance.

2. Electroplating:

A method to deposit a thin layer of metal onto the component's surface for enhanced aesthetics and corrosion resistance.

3. Passivation:

Primarily used for stainless steel, it enhances corrosion resistance by forming a passive oxide layer.

Plastic Surface Treatment in CNC Machining:

1. Polishing:

This process improves the surface finish of plastic components, providing a smooth and glossy appearance.

2. Painting/Coating:

Adds a protective layer to plastic parts, improving resistance to environmental factors and wear.

3. UV Curing:

A method to harden and cure the surface of certain plastics, enhancing durability.

Applications Across Industries:

The versatility of Metal Surface Treatment finds applications across various industries, including aerospace, automotive, medical devices, and electronics. From precision instruments to industrial equipment, each sector benefits from tailored surface enhancements that ensure optimal performance.

Why is surface treatment necessary for CNC machined parts?
Surface treatment processes enhances the properties of CNC machined parts, providing benefits such as improved corrosion resistance, increased hardness, and enhanced aesthetics.
What types of metals benefit most from anodizing?
Anodizing is particularly effective for aluminum, titanium, and magnesium metals, providing them with corrosion resistance and improved durability.
How does electroplating contribute to component durability?
Electroplating forms a thin, protective layer on the component's surface, offering enhanced corrosion resistance, improved wear resistance, and a decorative finish.
Is surface treatment recommended for plastic components used outdoors?
Yes, surface treatment for plastics, such as UV curing or coating, is recommended for outdoor use to protect against environmental factors like UV radiation, moisture, and temperature fluctuations.
What factors influence the choice between painting and coating for plastics?
The choice depends on factors like the desired finish, level of protection required, and the specific properties of the plastic material. Coating often provides a more durable protective layer compared to painting.
Can Metal Surface Treatment be customized for specific aesthetic requirements?
Yes, Metal Surface Treatments can be customized to meet specific aesthetic preferences, including color, texture, and finish. Customization options offer flexibility in achieving desired visual effects.
Are there eco-friendly options for Metal Surface Treatment in CNC machining?
Yes, environmentally friendly options, such as water-based coatings and eco-friendly anodizing processes, are available. These alternatives minimize the environmental impact of surface treatment.
How does UV curing improve the performance of plastic parts?
UV curing hardens the surface of plastic parts, increasing their resistance to scratches, chemicals, and general wear. It also enhances the overall durability of the plastic component.
Are there any considerations for post-treatment maintenance?
Post-treatment maintenance may include regular cleaning with mild solutions and avoiding abrasive materials. The specific maintenance requirements depend on the type of surface treatment applied.
Can surface treatment be applied to components with intricate geometries?
Yes, modern surface treatment techniques, including precision spraying and selective coating, allow for the application of treatments on components with intricate geometries, ensuring uniform coverage.
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Ruixing MFG - Custom CNC Machined Parts Manufacturer Since 2005
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