Did you know that Stainless Steel can rust?
The passivation process returns the stainless steel or other metals back to its original specifications by removing unwanted debris and oils from the surface and then submerging the part into a passivating bath. When a part is machined, various particles can permeate the surface of the base metal. This can weaken its resistance to corrosion and make the part more susceptible to corrosive environmental factors.
Debris, dirt and other particles and residue such as free iron, grease and machining oils all affect the strength of the natural surface and can become embedded in the surface during the machining process. These often go unseen to the human eye and are often the cause of the deterioration. As stated above, “passive” is defined as being less affected by environmental factors. The process improves and purifies the surface of the part. The restored surface acts like a protective coating to environmental factors such as air, water and other extreme environments. It is important to note that passivation does not change the outward appearance ofthe base metal.
The passivation of stainless steel material is a process performed to make a surface passive or less reactive. A surface film is created that causes it to lose its chemical reactivity. Stainless steel is already known as being corrosion-resistant, however the passivation process further strengthens its’ natural coating by improving the exterior surface of the material. Stainless steel passivation purges the stainless steel of the oxygen absorbed by the metal surface, creating a monomolecular oxide film. Passivation results in a highly desired, low corrosion surface on the metal.
Advantages of Passivation
- Improved Corrosion Resistance
- Uniform, Smooth Appearance & Finish
- Deburring (Polished Surface)
- Improved & Extended Life of Product