How long can the stainless steel wire mesh be used?

Stainless steel wire mesh has the ability to resist atmospheric oxidation - that is, rust, and also has the ability to corrode in acids, alkalis, and salts - that is, corrosion resistance. However, the degree of corrosion resistance varies with the chemical composition of the steel itself, the state of addition, the conditions of use, and the type of environmental medium. Such as 304 stainless steel wire mesh, in the dry and clean atmosphere, has absolutely excellent rust resistance, but moved it to the coastal area, in the sea fog containing a lot of salt, it will soon rust; and 316 steel pipe It performs well. Therefore, it is not any kind of stainless steel, it can resist corrosion and rust under any environment.

Stainless steel is a very thin and strong and stable chromium-rich oxide film (protective film) formed on the surface to prevent the oxygen atoms from continuing to infiltrate and continue to oxidize, thereby obtaining the ability to resist rust. Once for some reason, the film is continually destroyed, oxygen atoms in the air or liquid will continue to infiltrate or iron atoms in the metal will be continuously separated, forming loose iron oxide, and the metal surface will be continuously rusted. There are many forms of damage to this surface film. The most common types of stainless steel wire mesh in daily life are as follows:

1. On the surface of the stainless steel, there are deposits of dust or dissimilar metal particles containing other metal elements. In humid air, the condensed water between the deposit and the stainless steel is connected into a micro battery, which triggers an electrochemical reaction. The protective film is damaged, which is called electrochemical corrosion.

2. The surface of the stainless steel adheres to the organic juice (such as melon, noodle soup, glutinous rice, etc.), and in the case of water and oxygen, constitutes an organic acid, and the organic acid corrodes the metal surface for a long time.

3. The surface of the stainless steel wire mesh adheres to acid, alkali and salt substances (such as alkali water and lime water splashing on the wall), causing local corrosion.

4. In polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, nitrogen oxide), in the case of condensed water, sulfuric acid, nitric acid, acetic acid liquid point is formed, causing chemical corrosion.

All of the above can cause the corrosion of the stainless steel surface protective film to cause rust. Therefore, in order to ensure that the metal surface is permanently bright, it is not rusted:

1. The decorative stainless steel surface must be cleaned and scrubbed frequently to remove the deposits and eliminate external factors that cause modification.

2. The 316 material should be used in the coastal area, and the 316 material can resist seawater corrosion.

3. Some stainless steel tubes in the market do not meet the chemical composition requirements, and do not meet the 304 material requirements. Therefore, it will also cause rust, which requires the user to carefully select the products of reputable manufacturers.

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