Passzivációs

Passzivációs is a Hungarian term that translates to passivation in English. It refers to a surface treatment process that renders a metal or alloy less reactive or susceptible to corrosion. This is typically achieved by forming a thin, inert film on the surface of the material. This film acts as a barrier, preventing the underlying metal from reacting with its environment, such as oxygen, water, or other corrosive agents.

Common methods of passivation include electrochemical treatments, chemical treatments, and thermal treatments. For example, stainless steel is often passivated by exposure to nitric acid, which forms a passive chromium oxide layer on its surface. Aluminum can be passivated through anodizing, which creates a thicker, more durable oxide layer. The effectiveness of passivation depends on the type of metal, the specific passivation method used, and the environmental conditions.

Passivation is a crucial process in many industries, including aerospace, automotive, medical, and chemical processing, where the longevity and reliability of metal components are essential. It enhances the durability of materials, extends their service life, and maintains their aesthetic appearance by preventing rust and other forms of corrosion. The passive layer is typically very thin, often only a few nanometers thick, but it is highly effective in protecting the metal.