Why is stainless steel passivation a pioneer in corrosion resistance in the metal surface treatment industry?
Publish Time: 2024-12-23
In metal processing and applications, stainless steel is widely used due to its excellent corrosion resistance and aesthetics. However, the corrosion resistance of stainless steel is not inherent but needs to be enhanced through a series of surface treatment technologies. Among them, passivation treatment is an important means to improve the corrosion resistance of stainless steel, and is known as the corrosion resistance pioneer in the metal surface treatment industry.
The principle of stainless steel passivation is to form a dense passivation film on the surface of stainless steel through specific chemical or electrochemical treatment. This film is mainly composed of chromium oxide, and its thickness is usually between a few microns and tens of microns. It can effectively isolate oxygen, moisture and other corrosive media in the external environment, thereby significantly improving the corrosion resistance of stainless steel.
After passivation treatment, the surface of stainless steel becomes smoother and flatter, removing the original burrs and roughness, improving the overall appearance and texture. This smooth surface is not only beautiful, but also reduces the adhesion of dirt, further enhancing the anti-pollution ability of stainless steel. In addition, passivation treatment can effectively remove grease, oxides, rust and other contaminants on the surface of stainless steel, restore its original performance, and provide a good foundation for subsequent surface treatments such as coating and welding.
In a variety of harsh environments, such as chemistry, marine and other fields, stainless steel passivation membranes can significantly extend their service life and reduce the occurrence of pitting corrosion, stress corrosion cracking and other phenomena. This is because the passivation film has extremely high chemical stability and adhesion, is not easy to fall off or peel off, and can continue to provide effective protection for stainless steel. At the same time, passivation treatment can also form oxide films of various colors on the surface of stainless steel, such as light yellow, blue, etc., which increases its decorativeness and meets the aesthetic needs of different fields.
Stainless steel passivation treatment has shown wide application value in many fields. In food processing equipment, passivation treatment can prevent corrosion and bacterial growth, ensuring food hygiene and safety; in the field of medical devices, passivation treatment can ensure surface cleanliness and corrosion resistance, reducing the risk of cross-infection; in chemical equipment , passivation treatment can resist the erosion of chemical media and improve the durability of equipment; in building decoration materials, passivation treatment can enhance weather resistance and aesthetics, making the material more durable and bright.
It is worth mentioning that stainless steel passivation treatment not only improves the corrosion resistance of stainless steel, but also maintains its original color and luster, allowing the workpiece to maintain an appearance consistent with the raw material after passivation. This treatment method not only meets the needs of metal surface protection, but also takes into account aesthetics and practicality, providing a strong guarantee for the wide application of stainless steel.
As a pioneer in corrosion resistance in the metal surface treatment industry, stainless steel passivation significantly improves the corrosion resistance and chemical stability of stainless steel by forming a dense passivation film, providing an important guarantee for the application of stainless steel in many fields.
