In practical applications, there are many factors that will damage the passive film on the surface of the 304 4x8 stainless steel sheet price per kg, so that the composition of the stainless steel changes from a passive state to an active state, making its corrosion resistance and oxidation resistance performance worse. Next, we will Just follow the technical staff of Qiyi Metal to share with you several common factors that affect the destruction of the passivation film on the surface of 301 steel strip!
1. Chloride ion.
Chloride ions will cause great harm. In the passivation process, the content of chloride ions in the passivation solution should be strictly controlled, and the passivation materials used should have a limited amount of chloride ions. , When configuring, the water and cleaning water used also need to be controlled to ensure that the water quality meets the requirements, otherwise chloride ions will adhere to the surface of the passivated finished product.
2. Surface cleanliness.
304 4x8 stainless steel sheet price per kg The cleanliness of the surface will also affect the passivation film on the surface. Generally speaking, the smoother the surface and the lower the roughness, the more difficult it is for foreign matter to adhere to it, and its corrosion The performance is also lower, so when machining, the surface should be finished.
3. Use environmental media.
The 304 4x8 stainless steel sheet price per kg passivation film itself will be affected by the metastable structure, and its protective effect is directly related to the environmental medium. In use, the surface needs to be cleaned frequently, which can remove the harmful substances attached to the surface. Especially after contact with acidic items, it must be cleaned in time to restore the passivation film.
In addition, some components in the 304 4x8 stainless steel sheet price per kg material will also affect the passivation film on its surface. For example, the content of martensite and chromium and nickel in the material will affect the passivation film, and the nickel content If it is lower, the passivation performance is poor, and compared with martensite and austenite, the passivation performance is also poorer.