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Surface Finishing Services

Comprehensive post-processing solutions for metal and plastic components. From functional anodizing and electroplating to mirror polishing and custom powder coating—engineered to enhance corrosion resistance, wear performance, and visual appeal.

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Surface Finishing

Basic Finishes

Standard or minimal surface treatments used to clean, deburr, or prepare parts for further precision processing.

As-Machined

Standard surface roughness (3.2 µm / 125 µin Ra). Parts are cleaned and deburred without additional surface finishing.

Machining MarksVisible light tool marks
ServicesCNC Machining, Sheet Metal
Suitable MaterialsMetals, Plastics

Sanding & Deburring

Uses abrasives to remove surface blemishes, smooth sharp edges, and prepare components for subsequent coatings.

Machining MarksReduced but visible
ServicesCNC Machining
Suitable MaterialsMetals, Plastics, Wood

Mechanical Polishing

Uses fine abrasive compounds to reduce surface roughness, producing a smooth, highly reflective or mirror-like appearance.

Machining MarksBright or mirror effect
ServicesCNC Machining
Suitable MaterialsMetals, Plastics

Surface Textures

Abrasive blasting processes that remove surface contaminants and create uniform matte or satin textured finishes.

Sand Blasting

Uses compressed air to propel abrasive media, effectively removing scale, rust, and surface contaminants with light texture.

Machining MarksUniform rough feel
ServicesCNC Machining, Sheet Metal
Suitable MaterialsMetals, Plastics, Glass, Ceramics

Bead Blasting

Shoots fine glass beads at high pressure to clean parts and yield a smooth, glare-free matte satin texture without changing tolerances.

Machining MarksMatte or satin texture
ServicesCNC Machining, Sheet Metal
Suitable MaterialsMetals, Plastics, Ceramics

Coatings & Painting

Applies protective or decorative layers over components to enhance durability, corrosion resistance, and aesthetic appeal.

Powder Coating

Electrostatically applies dry powder and heat-cures it to form a durable, uniform, colorful, and UV-resistant protective layer.

Machining MarksCompletely removed
ServicesCNC, Sheet Metal, Injection Molding
Suitable MaterialsMetals, Heat-resistant Plastics

Spray Painting

Applies liquid paint coats over part surfaces for aesthetic color customization, branding logos, or functional surface protection.

Machining MarksPartially visible
ServicesCNC, Sheet Metal, Molding, 3D Print
Suitable MaterialsMetals, Plastics, Wood, Composites

Cataphoretic Coating (E-Coating)

Uses electrical current in a paint bath to deposit a uniform, highly corrosion-resistant organic coating over conductive metal parts.

Machining MarksHidden
ServicesCNC Machining, Sheet Metal
Suitable MaterialsSteel, Aluminum, Zinc, Cast Iron

Electroplating & Metallic Coatings

Deposits thin metallic layers via electrolysis to prevent rusting, improve conductivity, and elevate visual appearance.

Electroplating

Electrochemical process depositing thin protective metal films (like chrome, gold, or silver) onto conductive part surfaces.

Machining MarksPartially hidden
ServicesCNC Machining, Sheet Metal
Suitable MaterialsMetals, ABS Plastic

Zinc Plating (Galvanizing)

Applies a sacrificial zinc coating to protect iron and steel components from atmospheric corrosion and sacrificial rusting.

Machining MarksPartially hidden
ServicesCNC Machining, Electroplating
Suitable MaterialsSteel, Iron, Brass

Nickel Plating

Deposits a thin, hard nickel layer to provide superior wear resistance, chemical protection, and a bright metallic luster.

Machining MarksPartially hidden
ServicesCNC Machining, Sheet Metal
Suitable MaterialsSteel, Copper, Brass, Aluminum

Chemical Treatments

Alters metal surface chemistry through immersion to maximize corrosion resistance, surface hardness, and paint adhesion.

Anodizing (Type I, II, III)

Thickens the natural oxide layer on aluminum and titanium to boost corrosion/wear resistance and allow custom color dyeing.

Machining MarksVisible
ServicesCNC Machining, Sheet Metal
Suitable MaterialsAluminum, Titanium

Passivation (ASTM A967)

Chemical acid bath treatment removing free iron contaminants from stainless steel surfaces, creating a corrosion-resistant passive film.

Machining MarksVisible
ServicesCNC Machining, Sheet Metal
Suitable MaterialsStainless Steel, Corrosion Alloys

Chromate Conversion (Chem Film)

Chemical conversion coating for aluminum/magnesium providing corrosion resistance while preserving low electrical contact resistance.

Machining MarksVisible
ServicesCNC Machining, Sheet Metal
Suitable MaterialsAluminum, Magnesium Alloys

Black Oxide Coating

Chemical conversion coating producing a dark magnetite surface on ferrous metals to reduce reflection and provide mild corrosion resistance.

Machining MarksVisible
ServicesCNC Machining, Sheet Metal
Suitable MaterialsCopper, Steel, Iron

Surface Finishing FAQs

Material selection and end-use environment drive the choice. For Aluminum, Anodizing (Type II for color, Type III for wear) is standard. For EV Copper Busbars, Tin or Silver plating is recommended for conductivity. For Clear Plastics (PC/PMMA), Vapor or Flame polishing achieves optical transparency.

Processes like Passivation, Black Oxide, and Chem Film cause zero dimensional buildup. However, Anodizing adds ~5–25 µm and Powder Coating adds ~50–100 µm thickness. We factor these plating/coating build-ups directly into our precision CNC machining CAD offsets.

For Anodizing, we offer clear, black, red, blue, gold, green, and grey. For Powder Coating and Wet Painting, we match any custom color according to Pantone or RAL color codes.

Yes. We conduct rigorous quality control including salt spray corrosion testing, coating thickness measurement via X-ray fluorescence, adhesion tape testing, and surface roughness (Ra) profilometer verification upon request.

Please submit 3D CAD models in STEP (.stp / .step) or IGES (.igs) format. Please include a 2D drawing in PDF or DWG format to specify precise surface roughness (Ra), plating thickness, masking areas, or color codes.

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Once we receive your design files, our senior manufacturing engineers will manually perform a comprehensive DFM review and deliver an accurate, optimized quote within 24 hours.