Electropolished (Ra 0.8 µm 32 µin)

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Definition and Function

Electropolishing is an electrochemical finishing process that removes microscopic peaks and surface irregularities from metal parts. The workpiece acts as an anode in an electrolytic bath, where the high points dissolve preferentially, resulting in a smooth and bright surface. Its primary functions are to improve surface smoothness, enhance corrosion resistance, remove micro-burrs and contaminants, and create a clean, hygienic finish.

Colors

Silvery-White

Gold

After electropolishing, the surface appears silvery-white or mirror-bright. The base metal color remains unchanged, but the reflectivity and brightness are significantly increased.

Example of a bead-milled + anodized colored part

Electropolished (ra 0.8 µm 32 µin) 电解抛光示例1

Electropolished (ra 0.8 µm 32 µin) 电解抛光示例2

Technical Properties

Surface Roughness	Gloss	Corrosion Resistance	Cleanliness	Typical Applications
Ra 0.8 µm (≈ 32 µin)	High, mirror-like finish	Greatly improved compared to mechanical polishing	Excellent, easy to sterilize and maintain	Precision stainless-steel parts, medical instruments, vacuum chambers, and decorative components

Applicable Materials

Metals: Aluminum Stainless Steel Brass Copper Titanium

Process Characteristics

Non-mechanical, chemical finishing process with excellent surface leveling;

Effectively removes micro-burrs, oxide films, and machining stress;

Suitable for stainless steel, aluminum alloys, and other metals;

Produces ultra-clean surfaces free of embedded particles—ideal for food, medical, vacuum, and semiconductor applications.