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Electropolishing Basics
Electropolishing employs electrical current and chemicals in a highly controlled electrolytic bath to remove burrs and produce a high luster finish. This stress-free process preserves the detail in engraved or knurled surfaces, improves the fatigue life of stampings and springs, removes contaminants, passivates and creates an outer layer that retards corrosion.
During the electropolishing process, metal parts are immersed in an electrolytic chemical bath, which reaches both interior and exterior surfaces, and electrical current is applied at a controlled rate. The electropolishing process removes burrs, weld marks, scale from heat treating, and can produce a high-luster surface finish down to RA 2, depending on the part configuration. This process is ideal for finishing odd-shaped parts and for reaching interior surfaces when other methods fail.
Electropolishing has become the standard for metal finishing in a variety of industries. A sampling of the industries that regularly employ electropolishing services include: Aeronautics, Biotechnology, Electronics, Food Service, Marine, Medical/Surgical, Pharmaceuticals, Semiconductor, Vacuum, Water Treatment.
Features of the Electropolishing Process
- Creates a clean, uniform finish
- Removes burrs and weld marks
- Superior to passivation
- Aesthetic appeal: Bright, highly reflective appearance
- Improve Sterilization
- Surface resistance to the impregnation of bacteria
- Chemically-bonded oxide layer resists corrosion for many years
- Improved fatigue life of springs and stampings by removing surface impurities
- Causes no hydrogen embrittlement, coatings or residues
- Need for multiple finishing operations is eliminated