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Comprehensive Surface Finishing Services | Rongxu Machining

Expert Surface Finishing Services

Transform your custom parts with flawless finishes that enhance durability, corrosion resistance, and aesthetics. Our comprehensive services provide the perfect solution for any application.

  • Strict In-Process Quality Control
  • Wide Range of Finishing Options
  • Expert Engineering Support

Our Most Popular Finishing Services

Colorful anodized aluminum CNC parts
Anodizing (Type II & III)

Creates an incredibly hard, ceramic-like layer on aluminum parts. Perfect for enhancing wear resistance, corrosion protection, and achieving vibrant, long-lasting colors.

A sturdy metal frame with a smooth white powder coat finish
Powder Coating

Offers unparalleled durability and a flawless cosmetic finish. This tough, impact-resistant coating is ideal for industrial equipment, automotive parts, and consumer products.

A metal part with precise laser engraved markings
Laser Marking & Engraving

Add permanent, high-resolution marks like logos, serial numbers, and QR codes to your parts. Our non-contact laser process ensures precision without adding material or stress.

A metal part with a uniform matte texture from bead blasting
Bead & Sandblasting

Creates a clean, uniform, non-reflective matte finish. It's the perfect solution for removing imperfections and preparing surfaces for anodizing or painting.

A highly polished stainless steel component reflecting light
Polishing & Brushing

Achieve premium cosmetic surfaces, from a sophisticated directional brushed grain to a flawless mirror polish, elevating the perceived value of your products.

A custom control panel with white silkscreened text
Painting & Silkscreening

Apply liquid coatings for protection and precise color matching (RAL, Pantone). Add durable logos, labels, and graphics with our high-resolution silkscreening.

A Comprehensive Range of Finishes

Beyond our popular options, we provide a full spectrum of treatments to meet any technical or aesthetic requirement.

Anodizing (Type II, III)

Hard, colored, or clear protective layers for aluminum.

Polishing & Brushing

From satin brushed to mirror-like mechanical finishes.

Silk Screening

Permanent logos, labels, and graphics in various colors.

Powder Coating

Durable polymer finish in endless colors and textures.

Painting & E-Coating

Liquid coating for versatile color and protection.

Electropolishing

Creates a bright, smooth, and ultra-clean surface.

Electroplating

Zinc, Nickel, Chrome, Tin, and precious metal plating.

Passivation

Improves corrosion resistance of stainless steel parts.

Heat Treating

Annealing, hardening, and stress relieving to alter properties.

Bead & Sand Blasting

Creates a uniform matte texture for cosmetic or prep needs.

Chem Film / Alodine

Corrosion protection for aluminum that preserves conductivity.

Laser Marking & Engraving

Permanent part numbers, logos, and serialization.

Don't see the finish you need? Our capabilities extend beyond this list. Contact our engineers to discuss your specific project requirements.

Find the Perfect Finish for Your Application

FinishBest ForKey BenefitsMaterialsRelative Cost
AnodizingAluminum parts needing high durability and/or color options.Excellent Corrosion & Wear Resistance
Non-Conductive, Good Dielectric
Vibrant, fade-resistant colors
Aluminum$
Powder CoatingDurable, protective, and aesthetic coatings in a wide range of colors.Superior Durability & Impact Resistance
Thicker, uniform coating
Environmentally friendly
Most Metals$$
Chem Film (Alodine)Corrosion protection for aluminum where electrical conductivity must be maintained.Good Corrosion Resistance
Maintains Electrical Conductivity
Excellent primer for paint
Aluminum$$
PassivationMaximizing the natural corrosion resistance of stainless steel parts.Removes free iron, prevents rust
No dimensional change
Crucial for medical/food grade
Stainless Steel$
Bead BlastingCreating a uniform, non-reflective matte texture; surface prep.Creates a clean, uniform finish
Removes burrs and imperfections
Excellent prep for other finishes
Most Metals$
Diamond Cutting Creating brilliant, mirror-like edges for premium products. Ultra-precise, mirror-finish chamfers
Adds a premium, high-end aesthetic
No added material or thickness
Aluminum, Brass $$
Silk ScreeningAdding permanent graphics, logos, and part information.Excellent Durability & Abrasion Resistance
Wide Range of Color Options (Pantone/RAL)
High-Resolution Text & Graphics
Most Metals & Plastics$$

Our Finishing Advantage

Consistent Finishes

Strict process controls for color matching, thickness, and adhesion in every batch.

Advanced Equipment

Modern anodizing lines and coating booths ensure high-quality, efficient results.

One-Stop Solution

Combine our CNC machining with finishing for a streamlined, single-source supply chain.

Reliable Turnaround

We understand deadlines. Count on us for fast and dependable delivery schedules.

Surface Finishing FAQs

While both provide excellent corrosion resistance for aluminum, they serve very different purposes. Choose the one that fits your application:
  • Choose Anodizing when you need a hard, durable, non-conductive surface. It's ideal for parts requiring high wear resistance or a specific decorative color.
  • Choose Chem Film (Alodine) when you need to maintain electrical conductivity. It's the standard for parts that require grounding, EMI shielding, or are internal components where appearance is less critical.

Yes, and it's a critical design consideration. Different finishes add varying amounts of thickness:
  • Thick Finishes: Powder Coating can add a significant layer (typically 0.05mm - 0.15mm).
  • Moderate Finishes: Anodizing (Type II) adds a moderate amount (0.005mm - 0.025mm).
  • Thin Finishes: Chem Film and Passivation add a minimal thickness (<0.002mm).
To protect critical features like threads or mating surfaces, we offer precision masking. Please indicate any masked areas on your 2D drawings.

The best finish depends on your part's function and environment. Here’s a quick guide:
  • For Maximum Durability & Wear Resistance: Choose Hardcoat Anodizing (Type III).
  • For Decorative Color & Good Protection: Choose standard Anodizing (Type II) or Powder Coating.
  • For Electrical Conductivity & Corrosion Resistance: Choose Chem Film.
If you're unsure, our engineering team is happy to provide a recommendation based on your specific needs.

Yes, we offer custom color options for our most popular finishes.
  • For Powder Coating, we can match any standard RAL code for consistent and vibrant colors.
  • For Anodizing, color matching is more nuanced due to material and surface variations. We can work with samples to get as close as possible, but we recommend a sample part for mission-critical color matching.
Please provide your color requirements in your request for a quote.

Ready to Perfect Your Parts?

Our engineering team is ready to provide expert advice and a fast, comprehensive quote for your surface finishing needs.

Get Your Free Quote Now
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