Stainless steel has the ability to resist atmospheric oxidation-rust resistance. At the same time, it also has the ability to resist corrosion in media containing acid, alkali and salt-corrosion resistance.
Stainless steel is not that it cannot rust, but it is not easy to rust. 316 stainless steel will rust after a long time.
Due to the addition of Mo element, 316 stainless steel has greatly improved its corrosion resistance and high temperature resistance. The high temperature resistance can reach 1200-1300 degrees, and it can be used under harsh conditions.
The corrosion resistance of stainless steel varies with the chemical composition of the steel itself, the state of protection, the conditions of use and the type of environmental media.
For example, 304 steel pipe has excellent anti-corrosion ability in a dry and clean atmosphere, but when it is moved to the seaside area, it will quickly rust in sea fog with large salt content; while 316 steel pipe has performance good. Therefore, it is not any kind of stainless steel that can resist corrosion and rust in any environment. Stainless steel relies on an extremely thin, strong, dense and stable chromium-rich oxide film (protective film) formed on its surface to prevent the oxygen atoms from continuing to penetrate and continue to oxidize, thereby obtaining the ability to resist rust.
Once this film is continuously destroyed for some reason, 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 continue to be rusted.
How to extend the life of stainless steel pipes?
Stainless steel pipe does not rust mainly depends on the material of the stainless steel pipe itself, and it is also related to the installation environment of the stainless steel pipe. If the environment is more acidic, or acid rain, the seaside, etc., it will cause the stainless steel pipe to grow. rust.
If you want to extend the life of stainless steel pipes and reduce stainless steel corrosion and rust, in addition to choosing a regular stainless steel manufacturer and ensuring the material of the stainless steel pipes, later maintenance is also very important, such as frequent acid rain or coastal areas. Regular maintenance of stainless steel pipes should be taken. After acid rain has passed, the stainless steel pipes should be wiped and the pickling liquid should not be attached to the surface of the stainless steel pipe. This can reduce the corrosion of the stainless steel pipe by the pickling material, thereby improving the use of the stainless steel pipe. life.
If there are slight rust spots, you can wipe it with a little rust remover to destroy the further expansion of the rust spots and reduce the corrosion spots. For this reason, stainless steel pipes must be correctly selected and used reasonably. The correct choice is to choose stainless steel pipes according to the requirements of specific conditions of use. Reasonable use refers to the reasonable use of stainless steel pipes for their rust and corrosion resistance.
Wrong selection or unreasonable use will cause the stainless steel pipe to rust and be corroded. Problems with the quality of stainless steel pipes can also lead to rust and corrosion of stainless steel pipes. Therefore, the quality of stainless steel pipes is a prerequisite for the correct selection and rational use of stainless steel pipes.
Extended information:
1. The surface of decorative stainless steel 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. The chemical composition of some stainless steel pipes on the market cannot meet the corresponding national standards and cannot meet the material requirements of 304. Therefore, rust can also be caused, which requires careful selection of products from reputable manufacturers.
