újrapassiválásra

Újrapassziválás is a Hungarian term that translates to "re-passivation" in English. It refers to the process of restoring or improving the passive layer on a metal surface, particularly stainless steel. Stainless steel naturally forms a thin, protective oxide layer on its surface, which is crucial for its corrosion resistance. This passive layer can be damaged or compromised by various factors, such as mechanical abrasion, chemical attack, or welding.

Re-passivation aims to re-establish this protective layer. This can be achieved through several methods, including chemical cleaning and pickling. Pickling typically involves immersing the metal in an acidic solution, often a mixture of nitric and hydrofluoric acids. This process removes any contaminants or damaged material and simultaneously promotes the formation of a new, uniform passive layer. Electrochemical methods can also be employed for re-passivation, where an electric current is used to accelerate the formation of the oxide layer.

The effectiveness of re-passivation depends on factors such as the type of metal, the extent of surface damage, and the chosen method. Proper re-passivation is essential for maintaining the long-term corrosion resistance and aesthetic appearance of stainless steel components in various applications, from industrial equipment to architectural elements. It is a critical step in stainless steel fabrication and maintenance.