Surface treatment production line with plating tanks and coated metal parts

Surface Treatment

Finishes for appearance, protection, and function.

Choose finishes for corrosion resistance, color, texture, conductivity, wear protection, and product appearance. We review finish feasibility together with material and tolerance requirements.

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Finish Options

Common surface treatments for custom parts.

Anodizing process line with aluminum parts hanging over treatment tanks
Aluminum

Anodizing

Protective oxide layer with clear, black, or custom colors for machined aluminum parts.

Type II, hard anodizing
Bead blasting cabinet process with operator finishing aluminum parts
Texture

Bead Blasting

Uniform matte texture that reduces machining marks and prepares parts for anodizing.

Satin appearance
Powder coating booth with hanging sheet metal parts being sprayed
Sheet Metal

Powder Coating

Durable colored coating for enclosures, panels, brackets, cabinets, and welded parts.

RAL colors available
Metal brushing machine creating directional grain on sheet metal panels
Appearance

Brushing

Directional grain for stainless steel, aluminum panels, covers, and visible metal parts.

Linear finish
Operator polishing metal parts at a buffing wheel workstation
Appearance

Polishing

Improves brightness and smoothness for decorative, sealing, or appearance surfaces.

Mirror or semi-polish
Painting and plating line with metal parts on racks in a surface treatment workshop
Protection

Painting & Plating

Color, corrosion resistance, conductivity, or wear protection depending on project needs.

Zinc, nickel, paint

Finish Notes

Confirm surface requirements before production.

Critical DimensionsSome coatings add thickness. We review tolerance and masking before production.
Appearance SamplesFor visible parts, confirm color, gloss, texture, and acceptable range early.
Material MatchAnodizing is for aluminum, passivation is for stainless steel, powder coating suits sheet metal.
PackagingFinished surfaces need proper separation, film, foam, or individual packing for export.

Audio Component Guide

Match the finish to the part's job in the sound system.

Finish selection should follow the base material, exposure, appearance zone, electrical function, tolerance allowance, and expected handling during touring or installation.

Round-hole perforated steel grille for a professional stage speaker
Speaker grilles

Powder coating

Specify color, gloss, edge coverage, perforation openness, and foam or mesh bonding after coating.

Load-related metal rigging rail for a professional line array speaker
Rigging hardware

Plating or coating

Review corrosion exposure, hole wear, grounding, mating pins, masking, and the inspection evidence required by the project.

Machined aluminum heat sink for an active professional loudspeaker amplifier
Heat sinks

Black anodizing

Keep thermal interfaces, threaded holes, flatness zones, and electrical contact areas clear in the finish specification.

Machined aluminum control knobs for professional audio electronics
Visible controls

Blast, brush & anodize

Define texture direction, color range, engraving contrast, touch surfaces, and an approved cosmetic limit sample.

Finish Engineering

Specify the finish together with material, fit, and cosmetic zones.

Coating thickness, masking, texture direction, color range, corrosion exposure, electrical contact, and packaging can all affect the drawing and production route.

Include finishing in the design review