Many people will be surprised when the appearance of spring metal stamping parts shows brown rust spots: stainless steel does not rust, so it is not stainless steel that rusts, which may be a problem with steel. In fact, stainless steel will rust under certain conditions. The information of shrapnel metal stamping parts has the ability to resist atmospheric oxidation, which is called stainless.

It also has the ability to be corrosive in the medium containing acid, alkali and salt-that is, corrosion resistance. However, the size of corrosion resistance varies with the chemical composition, processing conditions, application conditions and environmental media types of its steel. For example, 304, in a dry and clean atmosphere, can resist corrosion very well. If it is moved to the seaside area, it will soon rust in the sea fog containing a lot of salt, while 316 is outstanding.

Therefore, not any kind of stainless steel can resist corrosion and rust in any environment. Shrapnel metal stamping parts Shrapnel metal stamping parts are a very thin, compact and stable chromium-rich oxide film (protective film) formed by the appearance of data, which avoids the continuous entry and oxidation of oxygen atoms and achieves the function of anti-corrosion. Once this protective film is constantly attacked by something.

Oxygen atoms in air or liquid will continue to enter or iron atoms in metal will continue to separate out, forming loose iron oxide, and the metal surface will be constantly corroded. There are many ways to destroy this surface film, such as dust, metal particles, adhesion of organic liquid and so on.