Electropolishing

Advantages of Stainless Steel Electropolishing too.

What is electropolishing?

Electropolishing is a reverse plating process. Parts are fixtured onto a special rack or basket and then lowered into a specially blended chemical bath. Electrical current is then applied to the part. Instead of adding to the surface imperfections such as impurities, and burrs, and other defects to be removed. The electropolishing process is monitored and refined to remove metal uniformly to customer specifications allowing great benefit on ultracleaning, microfinishing, and corrosion protection. Electropolishing processes generally specified to ASTM B912-00.

Advantages

Conventional mechanical finishing systems tend to smear, bend, stress, and even fracture the metal surface to achieve smoothness or luster. Stainless Steel Electropolishing offers the advantages of removing metal from the surface thus producing a unidirectional pattern that is both stress and occlusion-free. Parts also become microscopically smooth, and often highly reflective. Additionally, improved corrosion resistance and passivity are achieved on many ferrous and nonferrous alloys. The electropolish process micro and macro polishes the metal part. Micro-polishing accounts for the brightness and macro-polishing accounts for the smoothness of the metal part.

Through the electropolishing process, deburring is accomplished quickly because of the higher current density on the burr and because oxygen shields the low areas of the part the current is more concentrated on the burr itself.

Because the metal part is bathed in oxygen, there is no hydrogen embrittlement to the part. In fact, the electropolishing is like a stress-reliever removing hydrogen from the surface. This is important to parts placed under torque.

Another benefit of this electropolish process is that bacteria cannot successfully multiply on a surface devoid of hydrogen, therefore, electropolishing is ideal for medical, pharmaceutical, semiconductor, and other industries where the stainless steels integrity is critical for use in equipment and other parts. The combination of no directional lines due to mechanical finishing, plus a surface relatively devoid of hydrogen, results in a hygienically clean surface where no bacteria or dirt can multiply or accumulate.

 

 

Benefits of Stainless Steel Electropolishing:

  • Stress relief of surface
  • Removes oxide
  • Passivation of stainless steel
  • Superior corrosion resistance
  • Hygienically clean surfaces
  • Decarbonization of metals
  • No hydrogen embrittlement
  • No direction lines
  • Low-resistance welding surface
  • Reduces friction
  • Both polishes and deburrs all stainless parts
  • Sharpens edges
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Electropolishing is a reverse plating process. Parts are fixtured onto a special rack or basket and then lowered into a specially blended chemical bath. Electrical current is then applied to the part. Instead of adding to the surface imperfections such as impurities, and burrs, and other defects to be removed. The electropolishing process is monitored and refined to remove metal uniformly to customer specifications allowing great benefit on ultracleaning, microfinishing, and corrosion protection. Electropolishing processes generally specified to ASTM B912-00.

 

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