Our Summa Processing is an advanced form of electropolishing similar to, but the reverse of electroplating. The electropolishing process smoothes and streamlines the microscopic surface of a metal object. Stainless steel contains metallic and non-metallic inclusions, which are unavoidably included during manufacture. Mechanical polishing not only fails to remove inclusions, but also tends to push them further into the surface and even increase them by further pick-up of abrasive materials. These inclusions eventually can become points of corrosion.
Standard types of electropolishing do not remove metal uniformly. The resulting dimensions are usually out of blueprint tolerance. However, this is not a problem with Summa Processing due to the uniform rate of metal removal. Removing 0.0005" from a surface and maintaining a tolerance of plus or minus 0.0002" is readily achievable. While the surface of the metal is being brightened, it is also being refined and passivated. The metal is also being deburred. The basic metal surface is subsequently revealed bright, clean and microscopically smooth.
Benefits of Electropolishing:
Better Physical Appearance
- No fine directional lines from abrasive polishing
- Excellent light reflection and depth of clarity
- Bright, smooth polish; uniform luster of shaped parts
Enhanced Mechanical Properties
- Less friction and surface drag
- Increased production and duty cycles in process equipment
- Surface retains the true grain structure and properties of the bulk metal
- Fatigue strength is not reduced
- Higher fatigue strength can be promoted by particle-blasting the surface
- Stress-relieving of the surface
- Reduces galling of threads on stainless steel
- Better Corrosion and Tarnish Protection
Ease of Cleaning
- Substantially reduces product contamination and adhesion (much like a glass surface)
- Decreases cleaning time. Electropolished surfaces can be effectively hydroblasted in less time and with less pressure
- Improves sterilization and maintenance of hygienically clean surfaces
- Provides best passivation of stainless steel
- Decarburizes metals
- Removes cold-worked metal
For Special Effects
- Simultaneously deburrs as it polishes
- Reduces or sharpens edges, depending on racking position
- Polishes areas inaccessible by other methods
- Reveals flaws in metal surfaces undetectable by other means
- Provides a correct and reproducible microhardness on the metal surface
- Increases magnetism of parts by approximately 20 percent
- Allows micromachining of metal and alloy surfaces
- Processes large numbers of parts simultaneously
- Enables metal to be formed with fewer passes and annealing steps
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