Stainless steel 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. For example, 304 steel pipe has absolutely excellent rust resistance in a dry and clean atmosphere, but it is moved to the coastal area, and it will soon rust in sea fog containing a lot of salt; while 316 steel pipe will perform. good. Therefore, it is not any kind of stainless steel that is resistant to corrosion and rust in 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. Therefore, if it is used for a long time, rust will occur.
Long-term use of stainless steel sinks will definitely cause floating rust. When the stainless steel sink appears to be rusted, it must be properly cleaned. If it is improperly cleaned, it may cause more rust in the stainless steel sink. How to clean the stainless steel sink? ? Simply introduce the correct cleaning method for everyone.
The stainless steel sink is rusty. This is a phenomenon of floating rust. The sink is corroded by corrosive gases, liquids, metal dust in newly renovated rooms, or exposed to acidic or alkaline substances for a long time (non-304 material problems). The slight floating rust can be removed by repeatedly rubbing the cotton cloth with the toothpaste. The more serious floating rust can be removed by scrubbing along with the scouring pad and toothpaste along the drawing line. Generally, when cleaning the stainless steel sink, the above methods can be used for cleaning.