Key Features:

• Formation of Oxide Layer: One slightly visible and very thin oxide layer forms over the metal surface, which passivates it against further oxidation. 
• Corrosion Resistance: The oxide layer provides increased resistance to the corrosive action of water and other chemicals. 
• Surface Cleaning: The metal surface is usually cleaned beforehand to get rid of such impurities that would intervene in protecting oxide formation.

Essentially, passivation is done to enhance the durability and service life of metal components in challenging conditions. It is being widely used in aerospace, medical, and electronics industries. Developments in the passivation techniques give the next protective level to the metal, leading to enhancement in reliability and longevity of these materials.