Passivation is a process used to enhance the corrosion resistance of stainless steel.
Passivation is a chemical treatment applied to stainless steel to remove free iron from the surface. This process creates a thin, protective oxide layer that prevents the steel from reacting with air and causing corrosion.
The process typically involves immersing the stainless steel in an acid solution, such as nitric or citric acid.
This treatment removes contaminants, allowing the formation of a passive oxide layer that shields the steel from further oxidation.
The primary benefit is improved resistance to rust and corrosion. Passivated stainless steel components have a longer service life.
The process also removes surface contaminants, making the steel cleaner and more suitable for sanitary applications.
Passivation is widely used in industries where corrosion resistance is crucial, such as food processing, pharmaceuticals, medical devices and aerospace.