Stainless steel butterfly valve is formed by the surface layer of thin, very solid and stable chromium-rich oxide film (protective film), to prevent the continued infiltration of oxygen atoms, continue oxidation, and corrosion resistance. Once for some reason, the film was continuously damaged, the air or liquid oxygen atoms will continue to infiltrate or continuous separation of iron atoms in the metal, the formation of loose iron oxide, the metal surface will also continue to rust.
The advantages of stainless steel butterfly valve: Stainless steel butterfly valve in the atmosphere antioxidant, with acid, alkali, salt medium corrosion resistance, so all stainless steel butterfly valve with wear and corrosion resistance and so on. These features will be able to fully reflect the advantages of stainless steel, but in some special environmental media may still appear rusting, the following describes: 1 stainless steel butterfly valve surface adhesion organic juice (such as vegetables, noodles soup , Sputum, etc.), in the case of water and oxygen, the formation of organic acids, organic acids for a long time on the metal surface corrosion. 2. stainless steel butterfly valve surface containing deposits of other metal elements of dust or heterogeneous metal particles in the humid air, the condensate between the attachment and the stainless steel, the two connected into a micro-cell, triggering the electrochemical Reaction, the protective film is damaged, called electrochemical corrosion. 3. Stainless steel butterfly valve surface adhesion contains acid, alkali, salt substances (such as the renovation of the wall of alkali water, lime splashing), causing local corrosion. 4. Stainless steel butterfly valve in the polluted air (such as a large amount of sulfide, carbon dioxide, nitrogen oxides in the atmosphere), the case of condensate water, the formation of sulfuric acid, nitric acid, acetic acid point, causing chemical corrosion. The above conditions can cause damage to the stainless steel surface protective film caused corrosion.
In order to ensure that stainless steel does not rust, it is recommended that the surface of the decorative stainless steel must be cleaned and scrubbed frequently to remove the attachments and eliminate the external factors that cause the decoration. Reasonable choice for their own use of stainless steel working conditions.
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