Under what circumstances will stainless steel cold storage panels rust?

Under what circumstances will stainless steel cold storage panels rust?

The susceptibility of stainless steel plates to rust is closely related to their composition. In addition to iron, stainless steel plates also contain chromium, nickel, aluminum, silicon, and other components. The chromium content of ordinary stainless steel plates is generally not less than 12%, and even up to 18%. After adding elements such as chromium to steel, the properties of the steel can be changed. For example, the molecular structure of steel is more uniform, and a dense oxide protective film is more easily formed on the surface of the steel, greatly improving the corrosion resistance of stainless steel plates. So stainless steel plates can resist the corrosion of fire, water, acid, alkali, and various solutions, and do not rust. Experts have found that the more uniform the internal structure of steel, the closer the various components are connected, making it more difficult for corrosive substances to invade. In addition, a layer of oxide protective film is attached to the surface, just like putting armor on steel, which naturally makes it less prone to rust.

Why does stainless steel plate also rust? When brown rust spots (spots) appear on the surface of stainless steel plates and pipes, people are greatly surprised: they believe that "stainless steel plates are not rusty, and if rusted, it is not stainless steel plates, it may be a problem with the steel quality.". In fact, this is a one-sided erroneous view that lacks understanding of stainless steel plates. Stainless steel plates can also rust under certain conditions.

Stainless steel plates have the ability to resist atmospheric oxidation, namely rust resistance, and also have the ability to corrode in media containing acid, alkali, and salt, namely corrosion resistance. But the magnitude of its corrosion resistance varies with the chemical composition, additive state, usage conditions, and type of environmental medium of the steel itself. For example, 304 steel pipes have absolutely excellent rust resistance in a dry and clean atmosphere, but when moved to coastal areas, they will quickly rust in sea mist containing a large amount of salt; The 304 # stainless steel plate cold storage plate performed well. Therefore, not any type of stainless steel plate can withstand corrosion and rust in any environment.

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