What is the difference between stainless steel passivation and non-passivation
Stainless steel is widely used in daily life and industrial production, and passivation, as an important process of stainless steel surface treatment, has a significant impact on its corrosion resistance and service life. This article will introduce the difference between passivation and non-passivation of stainless steel in detail to help readers better understand this surface treatment technology.
First, the role of passivation.
Passivation treatment refers to the application of a chemical solution to the surface of stainless steel, and a dense oxide film is formed on the surface of stainless steel through chemical reaction. This oxide film can significantly improve the corrosion resistance of stainless steel, so that it can maintain stable performance in various harsh environments. In addition, passivation improves the scratch and wear resistance of stainless steel, extending its service life.
2. The difference between passivation and non-passivation of stainless steel.
1.Corrosion resistance.
There is a significant difference in corrosion resistance between stainless steel passivation and non-passivation. Unpassivated stainless steel is prone to oxidation in a humid environment, resulting in rust on the surface. The passivated stainless steel surface forms a dense oxide film, which can effectively block oxygen from contacting the stainless steel matrix, thereby significantly improving its corrosion resistance.
2.Appearance quality.
After the passivation treatment of stainless steel, the surface quality is significantly improved. The passivated stainless steel has a smooth, delicate surface with a consistent appearance. The surface of stainless steel without passivation treatment is prone to scratches, pits and other defects, which affects its aesthetics.
3.Service life.
Passivated stainless steel has a longer service life because it significantly improves its corrosion resistance, scratch and wear resistance. Stainless steel without passivation treatment is susceptible to corrosion and wear during use, resulting in a gradual decline in its performance. The passivated stainless steel can maintain a good performance state and extend its service life.
4.Cost & Maintenance.
Although stainless steel passivation requires a certain amount of investment, it can significantly improve the service life and corrosion resistance of stainless steel, thereby reducing long-term maintenance costs. Stainless steel without passivation treatment requires frequent maintenance and maintenance, such as cleaning, rust removal, painting, etc., which increases the cost of use. Therefore, it is more economical to choose passivated stainless steel in the long run.
III. Conclusion. In summary, there are significant differences between stainless steel passivation and non-passivation in terms of corrosion resistance, appearance quality, service life and cost. In order to improve the performance and service life of stainless steel, it is recommended to give preference to passivated stainless steel in production and application. At the same time, for occasions that require frequent use of stainless steel, such as chemical, food, construction and other fields, the importance of passivation treatment should also be fully recognized to reduce maintenance costs and improve the service life of equipment.