Surface Finishing Services

ZhenDong provides processes such as electroplating, powder coating, anodizing, and sandblasting to enhance the durability, performance, and appearance of metal components.

Our Surface Treatment Options

Surface treatment technologies are used to improve part appearance, durability, or performance. Each process has its own requirements for material compatibility, color, texture, and cost. Below are the finishing options we offer for both functional and aesthetic applications.

As-Machined

Standard finish, surface roughness of 3.2 μm (126 μin), removes sharp edges and deburs parts cleanly.

Sand Blasting

Forcefully aim the blasting media at the surface to remove coatings and impurities and increase adhesion.

Laser Logo

Permanent marking on product surfaces via high-energy laser beams.

Anodizing

Electrochemical process that forms a durable, corrosion-resistant oxide layer on the surface of metals.

Polishing

The process eliminates micro-level unevenness on the material, creating a high-gloss, smooth-to-touch, and visually pure surface.

Electroplaying

This technique uses an electrical current to facilitate the electrochemical deposition of metal ions from a solution, resulting in a uniform coating with excellent adhesion.

Brushing

Mechanical polishing that produces a unidirectional satin finish.

Black Oxide

Chemical bath that creates a black oxide coating on metal to improve corrosion resistance.

Passivation

Chemical treatment to enhance the corrosion resistance of metals by removing free iron from the surface.

Chroming

A high-gloss, wear- and corrosion-resistant surface is achieved by applying a thin chrome layer onto metal or plastic substrates.

Poder Coating

It applies electrostatically charged powder to a surface, which is then heat-cured into a coating that is durable, protective, and decorative.

Electrophoretic Coating

Coating process using charged particles suspended in a solvent, typically for uniform finishes.

FAQ About Surface Finishing for CNC Parts

Yes, but we take it into account. Each surface treatment process—such as anodizing, plating, or bead blasting—can slightly alter dimensions. We pre-adjust for this based on your specified tolerances to ensure all parts remain within ISO 2768 limits.

Most metals like aluminum, stainless steel, brass, and copper support various finishes. Some engineering plastics such as ABS or PC can undergo painting or light coating, but results vary and require evaluation based on the end use.

We offer anodizing, powder coating, plating, bead blasting, brushing, polishing, and more. The right choice depends on your requirements—whether you prioritize wear resistance, corrosion protection, or cosmetic appeal. Our engineers are happy to assist with recommendations.

Some finishes (e.g., hard anodizing or multi-step coatings) may add 1–3 days to production. However, our in-house coordination and trusted vendor network minimize delays and streamline delivery even for complex requirements.

All finished parts go through visual inspection for consistency in color, texture, gloss, and coverage. We follow AQL 2.5 standards and can provide samples or color swatches upon request for your approval.

Yes. All quotes are comprehensive and tailored to your drawing and spec—including surface finishing, QC, packaging, and delivery. No need to manage multiple suppliers—we handle everything in one place.

Need Custom CNC Milling Parts?

ZhenDong provides precision CNC milling services for prototypes, production parts, and OEM manufacturing programs. Welcome to consult us