Chemical Passivation Process
Harrison EP takes great pride in all of the products that it has an opportunity to work on. Our passivation process improves surface function of materials such as: stainless steel, AL6xn, nickel, etc.
Why does stainless steel rust? When the correct alloy has been chosen for a specific environment, and it still rusts, then something has likely affected the surface of the material. Real-world fabrication, welding and handling of stainless steel components will leave surface contaminates. These contaminates, including weld oxides and embedded particles, hinder stainless steel’s natural ability to resist corrosion. Pickling and/or Passivation can remove these surface contaminates, and allow the material to perform as it is engineered.
Chemical Passivating and it's Advantages
- Corrosion Resistance: passivation effectively removes surface contaminates in order to improve performance.
- Appearance: with no machinery actually coming into contact with the surface of the metal, passivation leaves it microscopically smooth.
- Restoration of Surfaces: as with any material, metal is susceptible to wear from any number of impacts, abrasions, erosion and corrosion.
- Deburring: electropolishing will simultaneously deburr and polish the surface.
- Cleanliness: after passivation the improved microfinish will reduce total surface area and contaminate adhesion.
- Endurance: since our processes remove cracks and other surface defects, the fatigue strength of a metal is improved. Seen most commonly in springs.
- Microsizing: electropolishing can be used as a method for sizing parts to close tolerances within 0.0001 inch.
- Inspection: electropolishing reveals the true microstructure of the metal and thus becomes an effective inspection tool.
Chemical passivation treatment removes free iron & contaminants and promotes the formation of a chromium-rich corrosion resistant layer...
Passivation and Pickling are two different processes, which produce different results...
Harrison Electropolishing has performed passivation treatments on AL6XN with excellent results for a number of years...
Surface contaminants, including grease, dirt, iron, and other imbedded metallic particles are removed during the passivation process...
The presence of exogenous surface contaminants may adversely affect the engineered corrosion-resistant properties of Nickel alloys...
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