Electropolishing Surface Finish Supplier In China
Electropolishing is an advanced electrochemical process that removes a microscopic layer of surface material, resulting in an exceptionally smooth, bright, and ultra-clean finish. This process is the ultimate solution for deburring, improving corrosion resistance, and reducing surface friction on critical metal components. As a premier technical supplier in China, Celerity Precision provides high-purity electropolishing for industries where performance and cleanliness are paramount. We deliver parts with superior surface integrity, ready for the most demanding applications from medical implants to aerospace fuel systems.
For a brilliant, ultra-clean, and performance-enhancing finish, contact Celerity Precision, your expert electropolishing supplier.
Your Electropolishing Surface Finish Manufacturer
At Celerity Precision, electropolishing is a science we have perfected. Unlike a simple supplier, we are a manufacturer that manages the entire electrochemical process within our state-of-the-art finishing facility. Our process involves immersing your components in a temperature-controlled electrolyte bath and passing a rectified current through them. We precisely control the chemistry, temperature, and current density to selectively remove microscopic high points on the surface. This controlled anodic dissolution results in a leveled, microscopically smooth surface that is free of burrs, contaminants, and residual stress.
Our manufacturing expertise extends to the design and fabrication of custom racking and tooling, which is essential for achieving a uniform polish on complex geometries and preventing rack marks in critical areas. This integrated capability, combined with our in-house CNC machining, makes Celerity Precision the ideal partner for projects requiring the highest level of surface purity and performance. We provide a fully documented and traceable process, ensuring that every electropolished part meets the stringent standards of the medical, pharmaceutical, and aerospace industries.
Entrust your critical components to a true manufacturer. Upload your project to receive a detailed quote for our precision electropolishing services.
Electropolishing: Technical Specifications
| Feature | Description |
| Surface Roughness (Ra) | Dramatically improves surface finish. Can reduce Ra values by up to 50% or more, often achieving a mirror-like finish of 0.1 μm to 0.4 μm (4 μin to 16 μin). |
| Applicable Materials | Primarily for Stainless Steel (300 & 400 series), Titanium, and certain Copper alloys. Not applicable to all metals (e.g., standard aluminum or steel). |
| Cosmetic Availability | Premium / Superior. Produces a brilliant, mirror-like, and highly reflective finish that is exceptionally clean and decorative. |
| Visual Appearance | A very bright, smooth, and reflective mirror-like surface. The finish is passive, meaning it has a high resistance to corrosion. Parts look ultra-clean and are free of any microscopic surface imperfections. |
Advantages of Electropolishing Surface Finish
Ultimate Surface Smoothness
Creates a virtually frictionless, ultra-smooth surface by removing microscopic peaks, far exceeding what mechanical polishing can achieve.
Superior Corrosion Resistance
Removes free ions and creates a passive, chromium-rich surface on stainless steel, dramatically enhancing its resistance to rust and chemical attack.
Microscopic Deburring
Safely removes micro-burrs and rounds sharp edges without the mechanical stress of tumbling or manual deburring.
Ultra-Clean and Sterile Surface
The smooth, passive surface is non-contaminating, non-particulating, and easy to sterilize, making it ideal for medical and food-grade applications.
Brilliant, High-Luster Appearance
Produces a bright, uniform, mirror-like finish that is aesthetically superior for high-end products.
Reduces Surface Stress
Removes the thin layer of stressed material often created during machining, which can improve the fatigue life of the component.
Electropolishing Design Considerations
Material Selection
The process is material-specific. Ensure your material choice (e.g., Stainless Steel 304/316L, Titanium) is compatible with electropolishing for optimal results.
Uniform Material Removal
The process removes a very small, uniform layer of material (typically 0.005mm to 0.02mm). This must be accounted for in the initial design if tolerances are extremely tight.
Racking and Contact Points
Parts must be held on a conductive rack. This will leave a small, unpolished contact mark. The location of this mark should be considered and ideally placed on a non-critical surface.
Welds and Heat-Affected Zones
Welded areas may polish at a different rate than the parent material, potentially resulting in a visible difference in finish. Proper weld quality is crucial.
FAQ
Is electropolishing just a shiny coating?
No, it is not a coating. It is a material removal process that smooths and passivates the existing surface of the metal itself.
How is electropolishing different from passivation?
While both processes improve corrosion resistance on stainless steel, electropolishing is far more comprehensive. It not only passivates the surface but also smooths, brightens, and deburrs it.
Will electropolishing change the size of my part?
Yes, it will remove a very small and uniform layer of material. Our engineers account for this to ensure your final part dimensions remain within tolerance.
Why is it so popular in the medical industry?
Because it creates an ultra-clean, smooth, and corrosion-resistant surface that is easy to sterilize and prevents bacteria from adhering, making it perfect for implants and surgical tools.
Can you electropolish aluminum parts?
Standard electropolishing is not effective on most aluminum alloys. Anodizing or chemical conversion coatings are better choices for aluminum.
Will my part have any marks after the process?
Parts will have a tiny contact point where they were held by the electrical rack. We strategically place these racks on non-critical surfaces to minimize their impact.
Does electropolishing remove deep scratches?
No. It is a micro-smoothing process. It will remove microscopic texture and burrs but will not remove visible scratches, which must be removed by mechanical polishing first.
Is the process expensive?
It is a premium finishing process and more costly than simple mechanical finishes, but it provides unmatched performance benefits in corrosion resistance and cleanliness.
How long does electropolishing take?
The process itself is relatively quick, but it requires careful racking and preparation. It typically adds 2-3 days to the overall lead time.
How should I specify electropolishing on my drawing?
Simply state “Finish: Electropolish.” If you have specific requirements, such as “Electropolish to a mirror finish, remove all burrs,” include those as well.