How much does Stainless Steel Passivation improve the corrosion resistance of materials?
Publish Time: 2024-09-17
As an important metal surface treatment method, Stainless Steel Passivation has a significant effect on improving the corrosion resistance of materials.
Stainless steel itself has a certain corrosion resistance, which is due to the formation of a thin and dense chromium oxide protective film on its surface. However, during processing, transportation and use, this protective film may be damaged, resulting in a decrease in the corrosion resistance of stainless steel. Through passivation treatment, this protective film can be repaired and strengthened, thereby greatly improving the corrosion resistance of stainless steel.
After passivation treatment, the chromium oxide film on the surface of stainless steel becomes more dense and stable. This film can effectively block the contact between oxygen, moisture and other corrosive media and the stainless steel matrix, slowing down the occurrence of corrosion reactions. Experiments show that the corrosion resistance of stainless steel after passivation treatment is significantly better than that of untreated stainless steel in various corrosive environments.
For example, in a humid atmospheric environment, unpassivated stainless steel may gradually rust, while passivated stainless steel can maintain a bright surface for a longer time. Passivation treatment can also significantly reduce the corrosion rate of stainless steel in acidic or alkaline solutions. It can resist the erosion of corrosive ions such as chloride ions, and prevent local corrosion phenomena such as pitting and crevice corrosion.
In addition, Stainless Steel Passivation can also improve the material's resistance to high-temperature oxidation. In a high-temperature environment, the passivation film can prevent the reaction of oxygen with the stainless steel matrix, preventing the material from oxidation and embrittlement.
However, the degree of improvement in corrosion resistance by Stainless Steel Passivation is also affected by many factors. Such as the choice of passivation process, the quality of the passivating agent, the processing time and temperature. Only when the passivation treatment is carried out under appropriate process conditions can the best corrosion resistance improvement effect be obtained.
In short, Stainless Steel Passivation can significantly improve the corrosion resistance of the material, extend the service life of stainless steel, and provide reliable guarantees for applications in various industrial fields.
