The passivation mechanism of stainless steel passivation solution 601 can be mainly explained by thin film theory, that is, it is believed that passivation is due to the action of metal and oxidizing medium, and a very thin, dense, and energy-efficient material is formed on the metal surface during the action. Passivation film that adheres firmly to metal surfaces.
This film exists as a separate phase, usually a compound of oxygen and metal. It plays the role of completely separating the metal from the corrosive medium, preventing the direct contact between the metal and the corrosive medium, so that the metal basically stops dissolving and forms a passive state to prevent corrosion.
