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Custom Surface Finishing Services
High-quality surface finishing services improve your part’s aesthetics and functions regardless of the manufacturing process used. Deliver quality metal, composites, and plastic finishing services so you can bring the prototype or part you dream of to life.
- Your Assurance of Quality
- Parts in 24 Hours or Less
- Exceptional Parts, Unwavering Standards
Surface Treatment Services for CNC Machining
CNC machining leaves visible tool marks during the process of removing portions of the block's surface to create desired shapes. If you don't want as-machined parts, select a surface finishing for your custom parts. At Xinjuli, we offer several common surface finishes that help improve functionality and aesthetics.
| IMAGE | Finishing | Description | Application |
|---|---|---|---|
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Anodizing | Anodizing is primarily used to treat the surfaces of aluminum components. The process thickens the natural oxide layer through electrolytic reactions,which enhances corrosion resistance, wear resistance, and surface hardness. surface hardness. Anodizing also enables a variety of coloring processes. | Widely applied in sectors such as aerospace, automotive, consumer electronics, industrial, and others. |
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Electroplating | Electroplating is primarily used to deposit metal ions onto the surfaces of workpieces through the application of an electrical current. The process forms uniform metallic coatings, which enhance conductivity, corrosion resistance, and aesthetics. Electroplating is applicable to metals such as copper, nickel, chrome, gold, and silver. | Used in precision instruments, communications, consumer goods, or decorative components. |
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Powder Coating | Powder coating involves applying dry powder to workpieces using electrostatic principles. The coating is attracted to the surface and then heated through a thermal curing process. This causes the powder to melt, adhere to the substrate, and form a continuous, highly protective, colored surface layer. | Applied in automotive, industrial, consumer, and outdoor applications. |
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Electrophoretic Paint | Spray painting utilizes pressure or electricity to atomize liquid paint into uniform particles, which are then sprayed onto a workpiece to form a thin, even film. This film levels and dries or cures to form a solid, continuous coating. | Aluminum, steel, Stainless Steel |
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Polishing | Achieves a smooth, reflective surface through mechanical or chemical means. Reduces surface roughness and enhances aesthetic and light-reflective qualities. | Applied in automotive, electronics, aerospace, marine, heavy industry, construction, and more. |
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Black Oxide | This steel-specific coating creates a black matte finish that enhances appearance and reduces glare while providing basic corrosion protection. | This material is applied to enhance both the aesthetics and durability of machinery and tools. |
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Bead Blasting | High-pressure air streams propel fine glass beads or other hard particles (such as steel shot, ceramic beads, etc.) onto the surface of components at high velocity. This precise physical impact enhances surface quality and performance, serving as a preparatory process before subsequent heat treatment. | Applied during the pre-treatment stage to improve the adhesion and uniformity of subsequent coatings, plating, or other surface treatment processes. |
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Heat Treatment | As a core metalworking process, heat treatment adjusts a workpiece's intrinsic properties (such as hardness, strength, toughness) following preparatory surface treatments. This process simultaneously hardens outer layers, thereby enhancing wear resistance and improving surface mechanical properties. | It is especially suitable for components with high-performance demands, such as gears and cutting tools. |
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Sandblasting | As a core surface pretreatment method, sandblasting uses high-velocity abrasive particles (e.g., aluminum oxide, sand) to impact workpieces. This process efficiently cleans surfaces and produces controlled surface roughening, which in turn makes it ideal for thoroughly removing contaminants (e.g., rust, old paint) and ensures the fundamental durability and adhesion of coatings. | Applied as a critical preparatory step for processes like spraying and plating. |
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Electropolishing | Electropolishing is engineered to create ultimate surface finishes by electrochemically dissolving microscopic protrusions. This process significantly reduces roughness, resulting in a high-gloss, reflective mirror surface. These linked steps not only enhance aesthetics but also create an exceptionally dense and pure surface layer, offering outstanding corrosion resistance and ease of cleaning. | Relevant to the medical, pharmaceutical, and food processing industries, highlighting cross-industry applicability. |
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Screen Printing | Screen printing, also known as stencil printing, begins by preparing a mesh screen. Ink passes through the open design areas, while other sections block the ink. A squeegee then pushes ink through the mesh onto the surface, copying the original artwork. | Common in automotive, consumer electronics, aerospace, marine, heavy industry, construction, and other. |
*Note: Table values are indicative. Actual specs can differ based on printer model, material, and settings. Delivery times depend on order volume and processing needs. Contact us for tailored recommendations on printing processes and parameters.
Surface Treatment Services FAQs
Anodizing is an electrochemical process that thickens the natural oxide layer on aluminum parts, enhancing corrosion resistance, wear resistance, hardness, and allowing for color dyeing. It is ideal for aerospace, automotive, electronics, and industrial applications.
Electroplating deposits a thin metal layer (such as nickel, chrome, gold, or silver) onto a substrate to improve conductivity, corrosion resistance, and appearance. It is commonly used for connectors, precision instruments, and decorative components.
Powder coating applies a dry powder electrostatically, followed by thermal curing to form a durable, uniform, and protective layer. It offers better coverage, environmental resistance, and reduced waste compared to traditional liquid spray painting.
Electrophoretic painting (e-coating) uses an electric field to deposit paint particles evenly onto conductive surfaces. It provides excellent coverage, corrosion resistance, and is widely used in automotive, industrial, and marine applications.
Black oxide is a conversion coating for steel that creates a black, matte surface. It provides mild corrosion resistance, reduces glare, and improves aesthetics for tools, gears, and mechanical components.
Bead blasting uses fine glass or ceramic beads propelled at high velocity to clean, deburr, and create a uniform matte finish. It is often used as a pretreatment to improve adhesion for coatings or plating.
Heat treatment is used after machining to alter metal properties such as hardness, toughness, and wear resistance. It is essential for high-stress components like gears, shafts, and cutting tools.
Sandblasting uses abrasive media like aluminum oxide to aggressively clean and roughen surfaces, while bead blasting uses softer media to create smoother, satin finishes without significant material removal.
Electropolishing electrochemically removes surface material to produce a smooth, shiny, and contamination-free finish. It improves corrosion resistance, cleanability, and aesthetics, making it ideal for medical, food, and pharmaceutical applications.
Screen printing applies logos, labels, or graphics onto parts using ink through a mesh stencil. It is durable, precise, and commonly used for branding on instruments, panels, and consumer products.
Yes. Our team offers guidance on the best finishes for your material, whether it’s aluminum, stainless steel, plastics, or other metals—ensuring optimal performance, durability, and appearance.
Absolutely. Common combinations include bead blasting + anodizing, sandblasting + powder coating, or plating + laser marking. We can tailor processes to meet both functional and visual requirements.
We follow industry standards (ASTM, MIL, ISO) and conduct quality checks including salt spray testing, thickness measurement, adhesion tests, and visual inspection to ensure reliability and consistency.
Please share:
Part material and quantity
Desired finish type and color (RAL/Pantone if needed)
Any industry-specific certifications required
Dimensional drawings or samples
Most finishes take 3–7 business days depending on the process, quantity, and complexity. Expedited options are available upon request.
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