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Copper & Brass

Electropolishing Service for Copper & Brass

Outstanding finishes on OFHC copper and 260 brass, with improved electrical and thermal conductivity, corrosion resistance, and high-luster appearance.

Outstanding260 Brass

ConductivityImproved

70+Years

#1Largest Electropolishing Specialist

Brass and copper alloys benefit from electropolishing with improved corrosion resistance, extended fatigue life, improved microfinish, and a bright high-luster finish.

Electropolishing improves electrical and thermal conductivity by removing surface oxides and contaminants that otherwise impede current flow and heat transfer.

OFHC 101 copper, 260 brass, and Berylco 25 beryllium copper achieve outstanding finishes through Able’s process.

Material removal is typically .001″–.0015″ measured from thickness or diameter, producing a uniform, smooth finish on most copper and brass alloys.

Send us your copper and brass sample parts and we will electropolish them at no charge so you can evaluate the finish firsthand.

Benefits of Electropolishing Copper & Brass

Outstanding
✨

Bright Lustrous Finish

260 brass and OFHC 101 copper achieve outstanding results through Able's electropolishing process.

Conductivity
⚡

Electrical Performance

Electropolishing removes surface oxides that impede conductivity in electrical connectors and bus bars.

Tarnish
🧹

Tarnish Removal

Removes tarnish and oxidation without aggressive chemicals or mechanical abrasion.

Smooth
💎

Ultra-Smooth Contacts

Produces smooth, uniform surfaces for electrical contacts and precision connectors.

No Distortion
⚙️

Safe Deburring

Deburrs intricate parts without distortion, preserving tight tolerances on thin-walled components.

Solder
🔗

Improved Solderability

Removes surface oxides that interfere with solder wetting and bond strength.

Before & After

Electropolishing Results: 260 Brass

BEFORE EP
→
AFTER EP

260 Brass, Visual Finish

Outstanding finish with a bright, warm luster characteristic of electropolished cartridge brass.

Before: 16–20 µin RaAfter: 8–10 µin Ra
SEM: BEFORE ELECTROPOLISHING
SEM: AFTER ELECTROPOLISHING

260 Brass, SEM Surface Topography (500×)

Scanning electron microscopy reveals how electropolishing dissolves surface peaks, eliminates machining marks, and removes embedded contaminants.

Rough: peaks, burrs, inclusionsSmooth: uniform passive layer

Copper & Brass Components We Electropolish

Electrical Connectors & Bus Bars

Maximum conductivity and low contact resistance.

Heat Exchangers

Improved thermal transfer and fouling resistance.

Plumbing & Fixtures

Valves, fittings, and decorative brass hardware.

Marine Hardware

Through-hulls, cleats, and naval brass fittings.

Electronics & RF

Connectors, waveguides, and shielding components.

Copper & Brass Alloy Finish Results

Expected finish quality from Able's electropolishing process based on extensive production experience.

Alloy Able Finish Quality EP Benefit Typical Parts Ra Before → After

Our Electropolishing Process

1

Part Evaluation

Alloy grade, geometry, heat treat condition, and finish specifications assessed by our experts.

2

Cleaning & Prep

Oils, oxides, and machining contaminants removed. Custom racking for optimal current distribution.

3

Electropolishing

Proprietary electrolyte dissolves surface peaks uniformly. A clean, passive oxide layer forms simultaneously.

4

Rinse & Dry

Thorough multi-stage rinse and controlled drying to preserve the electropolished surface quality.

5

QC & Delivery

Inspected per specification, documented, packed and shipped promptly.

Contact us to learn more about Copper & Brass electropolishing

Learn About the Electropolishing Difference


Electropolishing 101 Webinar

Electropolishing 101
Webinar

Learn everything you need to know about electropolishing as part of a private, interactive webinar. Let us know your availability and your part issues and our electropolishing experts can get you on our schedule.

Schedule Your Private Webinar
Try Electropolishing for Free: Sample Request

Try Electropolishing for Free:
Sample Request

Send us your parts and we'll electropolish them for free – we'll even pay for the shipping! Samples are processed and returned in a few days.

Request a Sample

Medical Device Manufacturing

Medical Device Manufacturing

From implantable devices to surgical instruments, electropolishing is a single-process treatment that results in biocompatible, safe and ultra clean parts.

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Aerospace

Aerospace

We offer aerospace vendors and original equipment manufacturers our signature metal finishing services to increase fatigue-resistance for their metal parts, rendering them capable of withstanding the stress and corrosion that comes with long-term use.

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Pharmaceutical

Pharmaceutical

Our strict adherence to industry standards ensures that pharmaceutical components are electropolished in accordance with ASTM B912 and ASME BPE specifications. These products are clean and smooth, corrosion resistant and contaminant free.

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Automotive

Automotive

Corrosion resistance and microfinish improvement are essential for critical automotive parts, making electropolishing an increasingly beneficial option for automakers.

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Consumer Appliance

Consumer Appliance

Our metal finishing services help increase corrosion resistance for these parts, and by removing the outermost layer of metal with electropolishing the durability and longevity of these appliance components is increased.

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Food & Beverage

Food & Beverage

Electropolishing materials for this industry eliminates the buildup of bacterial biofilms, as well as keeping the equipment free of contaminants like Salmonella. Electropolishing delivers the level of sanitation required by a number of regulatory agencies.

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Hydraulics & Pneumatics

Hydraulics & Pneumatics

From robotics to mobile equipment, the uses of electropolishing in the hydraulics and pneumatics industry are many. By helping prevent premature part failure, electropolishing reduces downtime and increases the life cycle of these components.

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Electronics

Electronics

Improving conductivity and performance is just one benefit electropolishing offers for electronics parts. The surface finish is improved by as much as 50%, removing imperfections from the material without material removal.

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Electropolishing, Passivation and Metal Surface Analytics Blog

Electropolishing for Small Modular Reactor Component Performance

Small modular reactors are entering component fabrication under tight schedule pressure. Across every coolant technology, surface integrity is becoming a qualification gate — not an afterthought.

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Why Manufacturers Use Electropolishing for Precision Metal Parts

Electropolishing is a precise and controllable process for eliminating defects from the surface of metal parts. But it’s not the only finishing process available to manufacturers; there are mechanical, chemical and plating processes that can remove defects and improve the…

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High-Quality Electropolishing for Small and Intricate Parts

Metal fabrication for parts used in the medical and electronics industries can involve dimensions as small as a grain of rice — or even a strand of hair. At that scale, surface defects may be invisible to the naked eye,…

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When is Stainless Steel Passivation Required?

While stainless steel is known for its corrosion resistance, it contains iron, which is susceptible to corrosion, especially if parts are frequently exposed to moisture or harsh environments. Contamination left behind by machining processes can also impede the corrosion resistance…

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Frequently Asked Questions

What services does Able Electropolishing provide?

We provide electropolishing, nitric & citric passivation, and vacuum vapor degreasing.

What are the maximum part sizes that can be processed for electropolishing, passivation, and vapor degreasing?

Electropolishing:

  • 300 & 400 series stainless steel: 108” Length x 41” Width x 42” Height
  • Copper, brass, aluminum, steel, and nickel alloys: 72” Length x 14” Width x 17” Height (best results are achieved on parts that are no larger than 12” square)
  • Titanium, Nitinol, tungsten, and niobium, etc. (refractory metals): 26” Length x 8-3/4” Width x 9-3/4” Height

Passivation:

  • Standard nitric acid passivation: 72” Length x 30” Width x 30” Height
  • Nitric acid/sodium dichromate: 20” Length, 20” Width x 20” Height
  • Citric acid: 26” Length x 18” Width x 15” Height

Vapor degrease:

  • Vapor degrease (vacuum): 23” Length x 16” Width x 10” Height

Note: If there is a question regarding our capabilities, please email a print for review to sales@ableelectropolishing.com.

What information do you require in order to receive a quotation?

We need a copy of the drawing, service needed, lot and annual quantities, process specification and packaging requirements.

What is your standard lead-time?

Standard delivery is 3 to 5 working days after receipt of order. Next day and same day services are offered at an additional cost. Please contact our sales department for further details.

What is the difference between passivation and electropolishing?

Passivation is a chemical process designed to remove free iron and other contaminants from the part surface. Electropolishing is an electro-chemical process that removes surface metal which improves micro finish, provides deburring and adds to the aesthetics of your part.

Contact an Electropolishing Expert Today