Stainless steel pickling passivation is a method of surface treatment of stainless steel, mainly through the action of acidic solution, to remove oxides and contaminants on the surface of stainless steel, and form a dense passivation film on the surface. The main functions of stainless steel pickling passivation are as follows:
Removal of contaminants: Stainless steel may be subject to the deposition of environmental contaminants such as grease, dust, oxides, etc. during processing, transportation, and use. These contaminants can affect the appearance and corrosion resistance of stainless steel surfaces. These contaminants can be effectively removed by pickling passivation, restoring the surface finish of stainless steel.
Oxide removal: Stainless steel may undergo oxidation reactions in high-temperature, humid and corrosive environments, causing a layer of oxide to form on the surface. These oxides can damage the finish and aesthetics of stainless steel, as well as affect its corrosion resistance. By pickling passivation, these oxides can be effectively removed and the stainless steel surface can be restored to shine.
Formation of passivation film: Pickling passivation can not only remove pollutants and oxides from the surface of stainless steel, but also form a dense passivation film on the surface. This passivation film is mainly composed of components such as chromium and titanium oxide, which has very good corrosion resistance. Passivation films can improve the corrosion resistance of stainless steel, preventing further oxidation and corrosion.
Increase surface finish: After pickling and passivation, the stainless steel surface can be pickled and passivated, and a brighter and smooth surface can be obtained. This is of great significance for some application scenarios with high requirements for appearance, such as home decoration, ships, etc. At the same time, the smooth surface also helps to reduce secondary pollution to stainless steel.
It should be noted that the pickling passivation treatment should pay attention to the safety of the operation, and avoid direct contact with the acid solution to cause damage to the ** and eyes. Generally speaking, after pickling and passivation, it should be neutralized and rinsed with clean water in time to ensure the cleanliness and safety of the stainless steel surface. In addition, when using the pickling passivation method to treat stainless steel, the appropriate pickling agent and treatment time should be selected according to the specific situation to ensure the optimal treatment effect.