Why does stainless steel need passivation treatment?

Stainless steel passivation: After the metal is treated with an oxidizing medium, the corrosion rate is significantly lower than before the original treatment, which is called passivation of the metal. Stainless steel passivation treatment is to allow the stainless steel surface to react with the passivation agent to form a stable passivation film, thereby protecting the stainless steel base material from being oxidized and corroded and causing rust.

The following are the reasons for passivation:

1. Extend service life: After passivation treatment, the surface of stainless steel forms a dense passivation film. This film can reduce the sensitivity of the metal surface, prevent direct contact between the metal and external media, and reduce the occurrence of corrosion, thereby reducing the occurrence of corrosion. Extends the service life of stainless steel.

2. Improve corrosion resistance: Passivation treatment can increase the corrosion resistance of the stainless steel surface, especially for some acidic or alkaline media, such as salt water, pickling liquid, etc. After passivation treatment, stainless steel can better Resist the corrosion of these media, thereby maintaining its normal working condition.

3. Improve appearance quality: Through passivation treatment, the passivation film formed on the surface of stainless steel has a certain degree of flatness, which can improve the surface quality of stainless steel and make it more beautiful and smooth. It is suitable for some high-demand applications, such as manufacturing , building decoration, etc.

4. Prevent secondary pollution: Passivation treatment can prevent the release of metal ions on the surface of stainless steel and reduce the occurrence of secondary pollution, which is especially important in the food field.

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Liaocheng Steel Merchants sharing and Exchange Meeting

Yangtze Steel Group was invited to attend the 2023 Shandong Stainless Steel Industry Association Annual Meeting

Liaocheng Steel Merchants sharing and Exchange Meeting

Yangtze Steel Group was invited to attend the 2023 Shandong Stainless Steel Industry Association Annual Meeting