Tech Text

Will the stainless steel filter rust?

The stainless steel filter only has the effect of preventing the phenomenon of rust, but it cannot completely prevent it. The stainless steel filter will also rust under certain conditions.

The rust of the stainless steel filter is mainly a process in which the iron element and the oxygen or carbon dioxide in the air dissolve in the water to produce oxidation or electrolysis to form iron oxide, iron hydroxide, basic iron carbonate and other components. Stainless steel is made by adding a certain amount of chromium to general carbon steel. The key reason why stainless steel has rust resistance is because steel contains chromium. Under the action of corrosive medium, chromium forms a strong and dense oxide film on the surface of steel parts, which is called "passivation film". This film isolates the metal from the external media and prevents the metal from being further corroded. It also has the ability to repair itself. If it is damaged, the chromium in the steel will regenerate a passivation film with the oxygen in the medium to continue to play a protective role. The rust resistance of stainless steel is also related to the use environment. In different environments, stainless steels with different chromium content should be used. The chromium content is the fundamental factor that determines the performance of the stainless steel filter.

The stainless steel filter screen has the ability to resist atmospheric oxidation (that is, rust resistance), and it also has the ability to resist corrosion (that is, corrosion resistance) in media containing acid, alkali and salt. However, the size of its corrosion resistance varies with the chemical composition of the steel itself, the state of mutual addition, the use conditions and the type of environmental media. Such as 304 stainless steel filter, in a dry and clean atmosphere, it has absolutely excellent anti-corrosion ability, but when it is moved to the beach area, it will soon rust in the sea fog containing a lot of salt; while 316 stainless steel The filter performed well.
 
Therefore, to ensure that the metal surface is permanently bright and not rusted, we recommend:
1. The surface of the stainless steel filter must be cleaned and scrubbed frequently to remove attachments and eliminate external factors that cause rust;
2. 316 stainless steel should be used in coastal areas, which can resist seawater corrosion;
3. Some stainless steels on the market cannot be chemically It meets the corresponding national standards and does not meet the 304 material requirements. Therefore, rust can also be caused.
 
MAISHI will inspect the material with XRF, and provide a material report to ensure that the corresponding material requirements are met. If you have any questions, please feel free to contact us, thank you.


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