Reasons for stainless steel heating tube rust
Why does the stainless steel heating tube rust? When the stainless steel heating tube showed brown rust spots (dots), everyone was surprised: "Stainless steel does not rust, and rust is not real stainless steel. It may be a heating tube. Manufacturers replaced stainless steel with other materials." actually not. Stainless steel can also rust under certain conditions. Stainless steel has the ability to resist atmospheric oxidation and rust resistance. At the same time, it also has the ability to resist corrosion in media containing acid, alkali, and salt, that is, corrosion resistance. 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 sea, it will quickly rust in the mist 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 continuously 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 the long-lasting brightness of the metal surface and not be rusted, we believe that it is necessary to clean and wipe the surface of the decorated stainless steel frequently to remove the attachments and eliminate the external elements that cause retouching. 316 raw material stainless steel should be used in the seaside area, which can resist seawater corrosion. Therefore, when we encounter the question of stainless steel heating tube rust, we should understand what is going on.
