The advantages of stainless steel butterfly valve:
The stainless steel butterfly valve can resist oxidation in the atmosphere and has corrosion resistance in the medium of acid, alkali and salt, so the all stainless steel butterfly valve has the characteristics of wear resistance and corrosion resistance. These characteristics can fully reflect the advantages of stainless steel, but there is still the possibility of rust in some special environmental media.
The stainless steel butterfly valve relies on a very thin, firm and stable chromium-rich oxide film (protective film) formed on its surface to prevent the continuous infiltration and oxidation of oxygen atoms and obtain the ability to resist rust. Once for some reason, this film is continuously damaged, oxygen atoms in the air or liquid will continue to infiltrate or iron atoms in the metal will continue to separate out, forming loose iron oxide, and the metal surface will be continuously corroded.
Stainless steel butterfly valve rust reasons:
1. The surface of the stainless steel butterfly valve adheres to organic juices (such as vegetables, noodle soup, sputum, etc.), and in the presence of water and oxygen, organic acids are formed, and organic acids will corrode the metal surface for a long time.
2. On the surface of the stainless steel butterfly valve, there are deposits of dust or heterogeneous metal particles containing other metal elements. In the humid air, the condensed water between the attachments and the stainless steel connects the two into a micro-battery, which triggers electrochemical reactions. Reaction, the protective film is destroyed, called electrochemical corrosion.
3. The surface of the stainless steel butterfly valve contains acid, alkali and salt substances (such as alkali water and lime water splashing on the decoration wall), causing local corrosion.
4. In the polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide and nitrogen oxide), when encountering condensed water, the liquid point of sulfuric acid, nitric acid and acetic acid is formed, causing chemical corrosion. The above conditions can cause damage to the protective film on the stainless steel surface and cause rust.
In order to ensure that stainless steel does not rust, it is recommended that the surface of decorative stainless steel must be cleaned and scrubbed frequently to remove attachments and eliminate external factors that cause modification. Reasonably choose the stainless steel material suitable for your working conditions.
