Skip to content

Electropolishing

Our electropolishing process removes impurities, imperfections, and burrs from the surface of metal objects, replacing traditional mechanical polishing or buffing.

Request a Quote

 

precision controlled

The electropolishing process, also known as electrochemical polishing, dissolves surface imperfections down to the micron, leaving the surface clean and polished. We carefully formulate our electrolyte chemistries to ensure optimum results for stainless steel finishing.

Metal Spring
Dental instruments

Products Requiring Electropolishing

  • Medical implants and devices
  • Surgical instruments
  • Aerospace components
  • Precision electronic components
  • Light fittings
  • Cookware and utensils
  • Hydraulic fittings
  • Fasteners
  • Wire racks
  • Automotive parts

 

Results That Matter

Electropolishing removes subsurface contaminants that cause corrosion, providing an enhanced level of passivation (ASTM B912). This process offers these additional benefits.

 

Benefits of Electropolishing

  • Up to 30x corrosion resistance over passivation
  • No directional lines from abrasive polishing
  • Strips contaminants
  • Smooths surface imperfections
  • Uniform Luster
  • Meets tight tolerances
  • I.D. Polishing

 

Request a Quote

FAQs

The reverse plating process often called “electropolishing” is also referred to as electrochemical polishing, anodic polishing, electrolytic polishing, or EP.

The electropolishing process involves an electrical current passing through stainless steel or alloy parts submerged in a sulfuric or phosphoric acid bath mixture to remove a thin metal surface layer.

  • Polishes areas inaccessible by other polishing methods
  • Improves surface reflectivity and brightness
  • Levels micro peaks and valleys for better sterilization (roughly 20-40 micrometers thick)
  • Removes surface iron and enhances the chromium/nickel content
  • Slightly reduces the part size, if necessary
  • Provides a corrosion-resistant surface
  • Removes surface discoloration from heat treating and/or oxidation

Surface Roughness Conversion Chart

Ra (micrometers) Ra (microinches) RMS CLA (N) Rt N Cut-off Length (in) Cut-off Length (mm)
0.025 1 1.1 1 .3 1 0.003 0.08
0.05 2 2.2 2 0.5 2 0.01 0.25
.1 4 4.4 4 0.8 3 0.01 0.25
.2 8 8.8 8 1.2 4 0.01 0.25
0.4 1.6 17.6 16 2.0 5 0.01 0.25
0.8 32 32.5 32 4.0 6 0.03 0.8
1.6 63 64.3 53 8.0 7 0.03 0.8
3.2 125 137.5 125 13 8 0.1 2.5
6.3 250 275 250 25 9 0.1 2.5
12.5 500 550 500 50 10 0.1 2.5
25.0 1000 1100 1000 100 11 0.3 8.0
50.0 2000 2200 2000 200 12 0.3 8.0
Ra = Roughness Average in micrometers or microinches.
RMS = Root Mean Square in microinches.
CLA = Center Line Average in microinches.
Rt = Roughness Total in microns
N = New ISO (grade) scale numbers.
Cut-off Length = Length required for sample.

Industries

Your Single Source of Total Solutions

We look beyond today to increase efficiency and serve your business.

Technician weighing pills

Medical

Learn about Medical

We finish your materials within tight tolerances to meet exacting quality and regulatory demands.

A soldier saluting

Military

Learn about Military

Defense contractors rely on our anodizing, laser-marking, descaling, and other services to meet military specifications.

Aerospace technician with a turbine engine

Aerospace

Learn about Aerospace

We offer a range of finishing services for aerospace components and maintain NADCAP certification

Manufacturing

Precision Manufacturing

Learn about Precision Manufacturing

CNC manufacturers rely on our services to complete final finishing.

Pharmacy tech checking data

Pharmaceutical

Learn about Pharmaceutical

We innovate processes in the science and art of finishing precision-engineered pharmaceutical components.

Water treatment facility

Water Purification

Learn about Water Purification

Our services for finishing water-system components include cryogenic deflashing, passivation, and laser marking.

Automotive factory

Automotive

Learn about Automotive

Our precision capabilities handle high-volume jobs for automotive OEMs.

Server room

Computing

Learn about Computing

We offer anodizing and laser marking of components and enclosures for computers and audio equipment.

Technician soldering components

Electronics

Learn about Electronics

Our finishing services meet critical tolerances for metal and plastic parts made for consumer electronics.

Food service conveyor

Food Service

Learn about Food Service

Our cleaning and finishing services meet strict regulatory requirements while enhancing performance and longevity.

Hydraulic machines

Hydraulics

Learn about Hydraulics

Our deburring, deflashing, and other services optimize the operating life of hydraulic equipment.

Field stripped colt 1911 firearm.

Firearms

Learn about Firearms

Our suite of capabilities delivers precise results producing the highest quality finishes.

NADCAP Certified

Regular NADCAP reviews and audits ensure compliance with AC7004 requirements for the aircraft, space, and defense Industry.

MSFJSA logo (Mass Finishing Job Shops Association)
MPMA - Minnesota Precision Manufacturing Association
Nadcap Administered by PRI Accredited
TUV logo
Finished in America (American flag) logo

Our Certifications About Industries

End-to-End

Finished Means Finished. Done

We eliminate the need for your parts to go elsewhere.

A conveyor belt carrying unfinished parts through a box with the Arrow Cryogenics logo, and when after the parts pass through, they are deburred and clean.