The mechanism of passivation can be explained by thin film theory, that is, it is believed that passivation is due to the action of metal and oxidation properties. When it acts, a very thin, dense, good covering performance, and firmly adsorbed on the metal surface is formed. Passivation film. This layer of film exists as a separate phase, usually a compound of oxide metal. It plays the role of completely separating the metal from the corrosive medium, preventing the metal from contacting the corrosive medium, so that the metal basically stops dissolving and forming a passive state to achieve corrosion resistance.

 

　　The world's annual steel loss due to corrosion accounts for about 15%-20% of the output, causing huge economic losses and waste of resources. Chongqing Dayou Surface Technology Co., Ltd. is a high-tech enterprise supported by the National Science and Technology Innovation Fund. Since its establishment, the company has been committed to the research and development of neutral salt spray test, anti-rust treatment, heavy anti-corrosion, marine anti-corrosion and ferrous metal anti-corrosion technology. Now it has five invention patents and twelve utility model patents. Our company's "Zinc-Nickel Infiltrated Layer Ferrous Metal Anticorrosion Process" won the national invention patent gold medal. Our high corrosion resistance and high wear resistance double-high series bolts have been awarded "Chongqing High-tech Products" and have been awarded the national intellectual property rights The bureau applied for invention patents.