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Alloy Electropolishing

Electropolishing & Deburring Service for MP35N Alloy

Outstanding, uniformly passive finishes on the premier implantable device alloy — ultrahigh strength, corrosion resistance, and biocompatibility in a single material.

OutstandingFinish

260 ksiTensile Strength

ImplantableFDA / ISO 13485

#1Largest Electropolishing Specialist

MP35N (UNS R30035) is a cobalt-nickel-chromium-molybdenum alloy that combines ultrahigh tensile strength above 260 ksi with excellent corrosion resistance and proven biocompatibility. That combination makes it the material of choice where a component must survive decades inside the human body without corroding, fracturing, or provoking a biological response.

Because MP35N develops its strength through heavy cold work and aging, its as-received surface typically carries drawing lines, embedded tooling debris, and residual tensile stress — all of which act as crack initiation sites under cyclic loading. Electropolishing removes 0.0002″ to 0.0005″ of material per surface, dissolving those peaks and subsurface defects rather than smearing them over, and leaves an outstanding, uniformly passive finish.

Able has electropolished MP35N for decades, including pacemaker and defibrillator lead conductors, neural stimulator electrodes, orthopedic cerclage cables, subsea fasteners, and aerospace structural fasteners. Components ranging from fine-gauge drawn wire to heavy threaded bolting run through the same validated process.

Send us your MP35N sample parts. We’ll electropolish them at no cost.

MP35N part before and after electropolishing

Benefits of Electropolishing MP35N

Outstanding

Outstanding Finish

Electropolishing dissolves surface peaks preferentially, taking MP35N from a drawn or machined condition down to a bright, directionless finish suitable for Class III implantable devices.

Biocompat

Biocompatibility

Removing embedded iron, tooling debris, and free surface contaminants leaves a chemically clean, chromium-enriched surface that performs predictably in long-term contact with blood and tissue.

Fatigue

Fatigue Life

Micro-notches, drawing lines, and residual tensile stress are the usual fatigue initiation sites in MP35N. Electropolishing removes them, which matters for lead conductors and cables that flex millions of cycles in vivo.

FDA

FDA & ISO

Able is ISO 9001:2015 and ISO 13485:2016 registered, with documented process control and full traceability to support Class III implantable device submissions.

Thrombus

Reduced Thrombus

A smoother surface gives platelets and proteins fewer sites to adhere to, reducing thrombus formation on blood-contacting components such as lead coils and electrodes.

Stress

Stress Removal

Wire drawing, coiling, and machining leave a cold-worked layer under residual tensile stress. Electropolishing removes that layer entirely rather than working it over, as mechanical polishing does.

Before & After

Electropolishing Results: MP35N

BEFORE EP
MP35N component before electropolishing
→
AFTER EP
MP35N component after electropolishing

MP35N, Visual Finish

Outstanding. Drawing lines and tooling marks are dissolved away, leaving an ultra-smooth, uniformly passive biocompatible surface with no directional texture.

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

MP35N, 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

MP35N Components We Electropolish

Pacemaker Leads

Conductor wires, coils, and cable assemblies requiring maximum flex fatigue life.

Neural Electrodes

Deep brain and spinal cord stimulator contacts where surface cleanliness drives charge transfer.

Orthopedic Cables

Cerclage cables and multi-strand constructs deburred without dimensional loss at strand crossings.

Subsea Fasteners

Marine bolting where chloride pitting and crevice corrosion resistance are critical.

Aerospace Fasteners

High-strength structural fasteners requiring clean, burr-free thread roots.

Dental Components

Abutments, connectors, and orthodontic wire finished for tissue contact.

MP35N 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, geometry, temper, and specification requirements assessed against production experience.

2

Cleaning & Prep

Oils, oxides, and contaminants removed. Custom racking designed for uniform current distribution.

3

Electropolishing

Proprietary electrolyte dissolves surface peaks at a controlled removal rate of .0002″ to .0005″ per surface.

4

Passivation

A uniform, corrosion-resistant passive oxide surface is formed across the part.

5

QC & Delivery

Inspected per specification, documented, packed and shipped promptly.

Contact us to learn more about MP35N 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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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