Surface Finishing Service
Professional surface finishing services for CNC machined parts.
Overview
PiPrecision provides comprehensive surface finishing services to enhance the appearance, durability, and performance of your precision-machined components. From decorative anodizing in custom colors to hard anodizing for wear resistance, our finishing capabilities meet both aesthetic and functional requirements.
Our finishing department operates under ISO 9001 quality standards, ensuring consistent results with every batch. If you need cosmetic finishes for consumer products, we deliver the right surface treatment for your specific needs.
With 99% customer satisfaction and a 0.26% return rate, you can trust us to deliver finishes that meet your exact specifications.
Capabilities
Decorative sulfuric acid anodizing, various colors
Wear-resistant hard coat, up to 0.003" thickness
Durable organic coating, wide color range
Uniform matte finish for cosmetic applications
Stainless steel corrosion resistance treatment
Chemical conversion coating for aluminum
Stainless steel bright, smooth finish
Decorative black finish for steel
Nickel, gold, silver, tin, etc.
Permanent part marking and serialization
Quality Assurance
- Coating thickness measurement (eddy current, X-ray)
- Salt spray testing for corrosion resistance
- Adhesion testing (cross-hatch, tape test)
- Color matching with spectrophotometer
Specifications
| Type II Coating Thickness | 0.005mm - 0.025mm (0.0002" - 0.001") |
| Type III Coating Thickness | 0.025mm - 0.075mm (0.001" - 0.003") |
| Type II Standard Colors | Clear, Black, Blue, Red, Gold, Green, etc. |
| Type III Colors | Black only (dyeable to dark colors) |
| Type II Hardness | 300-400 HV |
| Type III Hardness | 400-500 HV |
| Type II Corrosion Resistance | 336+ hrs salt spray |
| Type III Corrosion Resistance | 1000+ hrs salt spray |
| Powder Coating Thickness | 0.05mm - 0.15mm (0.002" - 0.006") |
| Powder Coating Colors | RAL colors, custom matches |
| Powder Coating Salt Spray | 1000+ hrs |
Equipment
Primary Machines
- Anodizing Line — Type II & III sulfuric acid anodizing
- Powder Coating Booth — Electrostatic spray application
- Bead Blasting Cabinet — Glass, ceramic, aluminum oxide media
- Passivation Line — Nitric and citric acid processes
Inspection Equipment
- Eddy Current Thickness Gauge — Non-destructive coating measurement
- X-Ray Fluorescence — Precise thickness analysis
- Salt Spray Chamber — ASTM B117 corrosion testing
- Spectrophotometer — Color matching and verification
Materials
| Material | Grades | Applications |
|---|---|---|
| Aluminum 6061/7075 | All series | All anodizing types, chem film, powder coat, plating |
| Stainless Steel 300 Series | 304, 316, 303 | Passivation, electropolishing, bead blast, plating |
| Stainless Steel 400 Series | 410, 416, 440C | Passivation, black oxide, plating |
| Carbon Steel | 1018, 4140, C45 | Powder coat, black oxide, phosphate, plating |
| Titanium | Grade 2, Grade 5 | Decorative anodizing (colors only) |
| Brass/Bronze/Copper | C360, C464, C932, C110 | Clear coat, powder coat, patina |
Sample Parts
Why Choose PiPrecision
- Quality Focus: ISO 9001 certified with 0.26% return rate
- Fast Delivery: 2 weeks standard turnaround
- Fast Response: Quotes within 24 hours
- 99% Satisfaction: Customer satisfaction rate