Definition - What does Passivation mean?

Passivation is a technique used to make a material passive and less affected by environmental factors like water or air by coating it with a protective material. It basically involves shielding of the base material by oxidation or micro coating. It makes the surface resistant to corrosion. The main goal of the process in stainless steel is to restore its original attributes by applying a protective oxide film.

Petropedia explains Passivation

It is important for a base metal to undergo Passivation because when the metal surface is embedded in the machining process, it gets deteriorated and affects the strength of the surface. It purifies the surface of metals and acts like a protective coating. The process is necessary for all metal surfaces. Some of the materials that use the Passivation are Silicon, Ferrous materials, aluminum and stainless steel.

The main benefits of using the process are:

  • It offers cleanliness.
  • It is uniform in nature thus provides smooth appearance.
  • It extends the life of the product.
  • Less maintenance is required after Passivation.
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