WHAT IS ELECTROPOLISHING?
Electropolishing is an electrochemical process that selectively removes material from metal surfaces, creating ultra-smooth, mirror-bright finishes. Unlike mechanical polishing which smears material, electropolishing actually removes it — starting with high points, burrs, and sharp edges first, leaving true surface smoothness at the atomic level.
At Atomic Machine, electropolishing is available as a standalone finishing service or fully integrated with our in-house CNC machining, laser marking, and passivation — one vendor, one quality system, one certificate package.
BENEFITS OF ELECTROPOLISHING
MIRROR-SMOOTH FINISH
Ra values of 2–5 microinches — reflectivity approaching mirror quality, impossible with mechanical methods alone.
MICRO-DEBURRING
Removes burrs from complex geometries, internal passages, and intersecting holes that hand tools can't reach
ENHANCED CORROSION RESISTANCE
Removes embedded iron and builds a uniform chromium oxide layer for maximum protection.
IMPROVED CLEANABILITY
Ultra-smooth surfaces resist bacterial adhesion and clean more easily — critical for medical devices and food processing equipment.
NO DIMENSIONAL CHANGE
Material removal is measured in microns (typically 0.0005"–0.002"), so tight tolerances are maintained.
REACHES EVERYWHERE
Electrolyte flows into every surface it touches - internal passages, blind holes, complex geometries - with no line-of-sight limitations
STRESS-FREE SURFACE
No mechanical stress introduced, unlike grinding or media polishing — resists fatigue and cracking.
MATERIALS & APPLICATIONS
Materials we electropolish:
Atomic Machine offers precision micro finishing for a wide variety of metal alloys.
· Stainless steel (300 series, 400 series, precipitation hardening)
· Titanium and titanium alloys
· Aluminum alloys
· Copper and brass
· Nickel alloys (Inconel, Hastelloy)
· Nitinol
· Carbon steel & tool steel
· Exotics & other metals
Size Range:
Small precision parts through large assemblies.
Please contact us for specific size capabilities, and if you do not see your particular alloy listed above or have any other questions.
INDUSTRIES WE SERVE
MEDICAL DEVICES
surgical instruments, orthopedic implants, cardiovascular devices, dental tools. Biocompatible, corrosion-resistant surfaces that meet FDA cleanability expectations.
AEROSPACE & DEFENSE
Fuel injectors, hydraulic manifolds, turbine components. Deburred internal passages for reliable flow and reduced friction under demanding conditions.
INDUSTRIAL & COMMERCIAL
Cylinders, valves, manifolds, precision fittings. Extended service life and optimal fluid flow for automotive, oil & gas, and power generation equipment.
ELECTROPOLISHING & PASSIVATION: BETTER TOGETHER
Electropolishing and passivation solve different problems, and most demanding applications benefit from both.
Passivation is a chemical process that removes free iron and surface contaminants without changing the part's dimensions or surface texture.
Electropolishing is an electrochemical process that both removes surface material — burrs, tool marks, embedded iron — and passivates the surface in the same step, follows the guidance of ASTM B912.
Best practice: Electropolish first, for smoothness and deburring, then passivate if additional corrosion protection is specified. Atomic Machine offers both processes in-house, so your parts move between steps without ever leaving our facility.
How Electropolishing Compares to Other Finishing Methods
TECHNICAL SPECIFICATIONS
Standard: Follows the guidance of ASTM B912
Material Removal: 0.0005" to 0.002" typical (controlled per customer requirements)
Surface Finish: Ra 2-5 microinches achievable
Certifications: ISO 13485, AS9100D, ISO 9001
Volume: Prototype through production quantities
Documentation: Certificate of Conformance with process parameters and material traceability
INTEGRATED MANUFACTURING
Machine → Mark→ Electropolish → Passivate
At Atomic Machine, we offer complete manufacturing solutions:
✓ CNC machine your components to specification
✓ Laser mark for permanent traceability
✓ Electropolish for mirror finish and deburring
✓ Passivate for maximum corrosion protection
Result: One vendor. One quality system. One certificate package. Faster delivery. Better quality control.
READY FOR MIRROR-SMOOTH SURFACES?
Request an electropolishing quote today. Send us your prints and we'll recommend the right process — electropolishing, passivation, or both — for your parts.
Call: 239-272-7850
Email: bill@atomicmachine.com | info@atomicmachine.com
Visit: 1236 Industrial Blvd, Naples, FL 34104
ISO 13485 | AS9100D