Passivation is a chemical process that enhances the corrosion resistance of metals, particularly stainless steel. It involves treating the metal surface with an acid solution, which removes free iron and other contaminants. This treatment leads to the formation of a thin, protective oxide layer that helps prevent rust and degradation. The passivation process is commonly used in various industries, including aerospace, automotive, and medical devices. By improving the durability of metal components, passivation contributes to the longevity and reliability of products, ensuring they perform well in challenging environments.