Why does stainless steel need anti-corrosion?

Stainless steel needs anti-corrosion treatment, mainly because it still contains a certain amount of iron ions inside. If it is not treated with anti-corrosion, it is easy to cause corrosion on the surface of the steel.

Necessity of anti-corrosion of stainless steel
Stainless steel is widely used in manufacturing and processing industries due to its excellent corrosion resistance. However, in fact, stainless steel contains a certain amount of iron ions inside. If it is not treated with anti-corrosion, it is easy to cause corrosion on the surface of the steel. In addition, if it is used improperly or due to environmental factors, stainless steel is also prone to corrosion and rust, so anti-corrosion is necessary.

Anti-corrosion methods of stainless steel
1. Passivation treatment: Passivation is a commonly used anti-corrosion treatment method for stainless steel surfaces. During the passivation process, an acidic solution such as nitric acid, sulfuric acid or hydrochloric acid is used to produce a uniform and dense chromium oxide film on the surface of the stainless steel plate, thereby improving the corrosion resistance of stainless steel. The choice of passivation can be based on different needs, such as corrosion resistance, decorative requirements, etc.
2. Electrochemical anti-corrosion treatment: Electrochemical anti-corrosion is to form a dense oxide layer or other compound layer on the surface of stainless steel by electrolysis, thereby improving its corrosion resistance. This method usually uses a specific electrolyte and current to form a protective layer on the surface of stainless steel.
3. Spray coating: The surface of stainless steel can be sprayed with anti-corrosion coatings such as epoxy resin, polyester, polyurethane, etc. These coatings can provide additional anti-corrosion protection, forming a barrier to isolate the direct contact between stainless steel and the external environment and increase its corrosion resistance.
4. Take good protective measures: During the use and installation of stainless steel plates, good protective measures should be taken, such as avoiding direct contact with chemicals, preventing moisture or long-term immersion, and timely cleaning and repairing possible damage, etc.

In addition to the above methods, other suitable anti-corrosion treatment methods can be selected according to different special needs and actual conditions, such as hot-dip galvanizing, chrome plating, etc. It is important to understand the application environment and requirements before selecting and implementing the anti-corrosion treatment method, and consult with professionals to obtain the ideal anti-corrosion effect.