Reasons for stainless steel tubular heater rust
Stainless steel has the ability to resist atmospheric oxidation and has rust resistance, and only the corrosion resistance in the medium containing acid, alkali and salt. However, the size of its anti-corrosion ability is changed with the chemical composition of its steel itself, each other's conditions, operating conditions and environmental media types. For example, 304 steel pipe has excellent anti-corrosion ability in a dry and clean atmosphere. If it is moved to an area near the seaside, it will quickly rust in the fog rich in salt, while 316 steel shows Outstanding. Therefore, it is not any kind of stainless steel, which is corrosion-resistant and does not rust in any environment.
Stainless steel relies on its appearance to form an extremely thin, compact and stable chromium-rich oxide film (protective film), which prevents oxygen atoms from continuously entering and oxidizing, and obtains the ability to resist corrosion. Once for some reason, this film is continuously damaged, oxygen atoms in the air or liquid will continue to enter or separate from the metal iron atoms, forming loose drops of iron oxide, and the metal surface will suffer. Constant corrosion.
In order to ensure that the surface of the metal is long-lasting and not rusted, the maintenance method: it is necessary to frequently clean and wipe the surface of the decorated stainless steel to remove the attachments and eliminate the external elements that cause the retouching. 316 raw material stainless steel should be used in the seaside area. 316 raw material can resist seawater corrosion.