passiválást

Passziválás 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 inert. The primary goal of passivation is to form a thin, protective, and non-reactive film on the metal's surface, thereby preventing or significantly reducing corrosion.

This process is commonly applied to stainless steel, where it enhances its inherent corrosion resistance. When stainless steel is exposed to certain chemicals, particularly oxidizing agents like nitric acid, a passive layer rich in chromium oxide is formed. This layer acts as a barrier, preventing the underlying metal from further oxidation or corrosion. Other methods of passivation can involve electrochemical treatments or the use of specific cleaning agents.

Passivation is crucial in various industries where metal components are exposed to corrosive environments. This includes the medical device industry, where biocompatibility and resistance to sterilization processes are vital, and the food and beverage industry, where hygiene and preventing contamination are paramount. It is also widely used in aerospace, chemical processing, and automotive manufacturing to extend the lifespan and maintain the integrity of metal parts. The effectiveness of passivation depends on factors such as the type of metal, the specific passivation treatment used, and the environmental conditions the metal will encounter.