Passivability is the property of a material to form a very thin layer of oxide of the order of a few nanometers, for the only contact with atmospheric air.
This oxide has a very important function, which is to protect the core of the material from corrosion.
The particular advantage of passivation lies in the fact that this layer of oxide is formed spontaneously, without any artificial intervention being necessary. Materials that have good passivation are of particular importance in many applications: the various types of stainless steel, for which the phenomenon is due to the presence of a minimum content of 12% chromium that forms the protective oxide ; and titanium, which has the characteristic of developing the oxide film without the presence of any particular binder. Voices correlateemodify wikitesto
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