Post-Processing & Finishing
Surface
Treatment
From mechanical polishing and bead blasting to hard anodizing, PVD coatings, and DLC — we offer a complete range of surface treatment processes to enhance the appearance, corrosion resistance, wear performance, and functional properties of your CNC machined parts.
25+
Processes
5
Categories
Ra 0.05μm
Mirror Finish
Anodizing ✦
Polishing ✦
Bead Blasting ✦
Hard Anodizing ✦
Nickel Plating ✦
Powder Coating ✦
DLC Coating ✦
PVD / CVD Coating ✦
Passivation ✦
Chrome Plating ✦
PTFE Coating ✦
Laser Engraving ✦
Anodizing ✦
Polishing ✦
Bead Blasting ✦
Hard Anodizing ✦
Nickel Plating ✦
Powder Coating ✦
DLC Coating ✦
PVD / CVD Coating ✦
Passivation ✦
Chrome Plating ✦
PTFE Coating ✦
Laser Engraving ✦
All Processes
Complete Surface Treatment Capabilities
01
Mechanical Surface Treatment
Physical processes that alter surface texture, finish, and cleanliness
Polishing
Mechanical and electropolishing to achieve mirror-grade surfaces. Ra down to 0.05 μm. Applied to stainless steel, aluminum, brass, and titanium for medical, optical, and decorative parts.
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Brushing / Hairline Finish
Directional grain finish using abrasive belts or pads. Creates a consistent satin sheen with visible linear texture. Common on stainless steel and aluminum consumer and industrial parts.
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Bead Blasting / Sandblasting
Abrasive media propelled at high velocity creates a uniform matte or satin texture. Removes machining marks, improves surface uniformity, and prepares parts for anodizing or coating.
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Vibratory Finishing / Tumbling
Mass finishing process using ceramic or plastic media in a vibratory bowl. Efficiently deburrs, edge-breaks, and improves surface finish on large batches of small to medium parts simultaneously.
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Deburring
Manual, mechanical, or thermal removal of machining burrs from edges and holes. Critical for functional parts where burrs could cause assembly failure, seal damage, or contamination.
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Chamfering & Edge Breaking
Controlled edge geometry modification — chamfers, radii, and blend edges applied to sharp corners. Improves safety, prevents coating peeling, and meets aerospace edge requirements (AMS 2488).
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02
Chemical Surface Treatment
Electrochemical and chemical conversion processes for corrosion protection and surface modification
Most Requested
Chemical · Featured Process
Anodizing (Type II)
Electrochemical oxidation that converts the aluminum surface into a hard, porous aluminum oxide layer — naturally corrosion-resistant, electrically insulating, and receptive to dye coloring. Type II anodizing is the industry standard for aluminum parts requiring cosmetic consistency and moderate wear resistance.
Thickness: 5–25 μmClear / Black / Color
Al 6061 / 7075 / 6063MIL-A-8625 Type II
Full Process Details
Passivation
Chemical treatment for stainless steel that removes free iron contamination and strengthens the natural chromium oxide passive layer. Dramatically improves corrosion resistance in humid, saline, and chemical environments.
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Chemical Oxidation / Blackening
Hot caustic blackening (black oxide) for steel parts — provides a matte black appearance, light corrosion resistance, and minimal dimensional change (<0.001 mm). Common on tools, fixtures, and mechanical components.
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Pickling & Acid Washing
Acid bath treatment that removes scale, rust, heat tint, and oxide layers from metal surfaces. Used as a pre-treatment step before welding, plating, or coating, and to restore stainless steel after heat-affected zone discoloration.
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03
Electroplating
Metallic coating deposition for corrosion protection, conductivity, hardness, and aesthetics
Electroplating deposits a thin, uniform metallic layer onto base materials through electrochemical processes. The choice of plating metal determines the functional properties — corrosion resistance, hardness, conductivity, solderability, or appearance. We offer 7 plating types to cover all application requirements.
Zn
Zinc Plating
General corrosion protection. Blue-bright or yellow chromate passivation.
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Ni
Nickel Plating
Bright or electroless nickel. Uniform coverage on complex geometry. Wear & corrosion resistance.
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Cr
Chrome Plating
Hard chrome for wear surfaces; decorative chrome for appearance. High hardness Hv 800–1000.
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Cu
Copper Plating
High conductivity base layer. Used as under-plate or for EMI shielding applications.
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Ag
Silver Plating
Maximum electrical conductivity. RF components, contact surfaces, and antenna connectors.
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Au
Gold Plating
Corrosion-proof contact surfaces. Connectors, PCB contacts, and precision instrument parts.
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Sn
Tin Plating
Excellent solderability and food-contact safety. Used on electronics terminals and food-processing equipment fittings.
04
Coating & Painting
Organic and functional coating processes for protection, aesthetics, and low-friction surfaces
Powder Coating
Electrostatically applied thermosetting polymer powder cured under heat. Produces a durable, chip-resistant, and UV-stable coating 60–100 μm thick. Full RAL/Pantone color range with matte, gloss, satin, and textured finishes available.
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Liquid Paint / Spray Painting
Conventional liquid paint spraying for complex geometry, thin-wall parts, or where powder coating process temperatures are not suitable. Available in primer + topcoat systems with custom RAL colors.
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E-Coat / Electrophoretic Coating
Electrically deposited paint that penetrates cavities, blind holes, and complex internal geometry with perfect uniformity — impossible with spray painting. Exceptional corrosion protection at 15–25 μm thickness.
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PTFE / Teflon Coating
Sprayed and baked PTFE coating creates an ultra-low friction, chemically inert, and non-stick surface. Applied to valve bodies, mold surfaces, food-contact parts, and mechanical guides where stick-slip must be eliminated.
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05
High-Performance Functional Treatments
Advanced surface engineering for extreme wear, temperature, and precision requirements
Hard Anodizing (Type III)
25–75 μm dense oxide layer. Hv 350–550, excellent wear and dielectric resistance. MIL-A-8625 Type III.
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DLC Coating
Diamond-Like Carbon — Hv 2000–8000, μ <0.1, 1–5 μm. Near-zero dimensional impact. Cutting tools, molds, engine parts, precision shafts.
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PVD / CVD Coating
TiN, TiAlN, CrN, AlCrN — Hv 2200–3300. Wear and oxidation resistance for cutting tools, mold inserts, and sliding surfaces at high operating temps.
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Laser Marking & Engraving
Permanent, high-precision laser marking for part numbers, logos, QR codes, and serial numbers. No ink, no chemicals. Pad printing and silk screening also available for color branding.
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Quick Reference
Process Selection Guide
| Process | Primary Benefit | Base Material | Typical Thickness | |
|---|---|---|---|---|
| Polishing | Appearance, Ra 0.05 μm, biocompatibility | SS, Al, Ti, Brass | Material removal | Details → |
| Bead Blasting | Uniform matte texture, pre-coat prep | All metals | Surface only | Details → |
| Anodizing Type II | Corrosion resistance, color, insulation | Aluminum only | 5–25 μm | Details → |
| Hard Anodizing | Hardness Hv 500+, wear resistance | Aluminum only | 25–75 μm | Details → |
| Passivation | Corrosion resistance on stainless | Stainless steel | Conversion only | Details → |
| Zinc Plating | General corrosion protection, low cost | Steel, iron | 5–25 μm | Details → |
| Nickel Plating | Uniform coverage, moderate corrosion | Most metals | 5–50 μm | Details → |
| Hard Chrome | Wear resistance Hv 900, low friction | Steel, SS | 20–500 μm | Details → |
| Powder Coating | Durable color, chip resistance | Steel, Al | 60–100 μm | Details → |
| PTFE Coating | Non-stick, low friction μ <0.1 | Most metals | 15–30 μm | Details → |
| DLC Coating | Extreme hardness, near-zero friction | Steel, Ti, WC | 1–5 μm | Details → |
| PVD / CVD | Tool life, oxidation resistance | Steel, carbide | 2–6 μm | Details → |
25+
Finishing Processes
Ra 0.05μm
Finest Surface
Hv 8000
Max DLC Hardness
24hr
Quote Turnaround
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Send Your Drawing.
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Every enquiry includes a DFM review — tolerance feasibility, material confirmation, and process approach confirmed before production starts. MOQ 1 piece.
24hr
Quote Response
MOQ 1
Prototypes OK
ISO
9001:2015
📐
DFM Review on Every Enquiry
Tolerance feasibility, fixturing strategy, and material confirmation. Specific, actionable feedback — not generic pushback.
🎯
First Article Inspection — Standard
FAI report on every new run. Material certs and surface treatment certs included with every shipment.
🔄
Same Process: Prototype to Production
Process plan from your prototype applies to production batches. No re-qualification when you scale.
⚙
3 / 4 / 5-Axis CNC + Turning
Complex structural parts, shafts, housings, and transmission components. Metals and engineering plastics.
ISO 9001:2015
3/4/5-Axis Milling
CNC Turning
CMM Inspection
Global Delivery