Corrosion resistance of stainless steel mesh belt

All metals react with oxygen in the atmosphere to form an oxide film on the surface. Unfortunately, the iron oxide formed on ordinary carbon steel continues to rust, causing the corrosion to continue to expand, eventually forming holes. You can use paint or anti-rust metals (such as zinc, nickel and chromium) for electroplating to fix the carbon steel surface, but, as we all know, this kind of protection is just a thin film. If the protective layer is damaged, the steel below will begin to rust. The corrosion resistance of stainless steel mesh belt depends on chromium, but because chromium is one of the components of steel, the protection method is different. The maximum amount of chromium added is when it is higher than 11.7, the atmospheric corrosion resistance of the stainless steel mesh belt is significantly improved, but when the chromium content is higher, although the corrosion resistance can still be improved, the corrosion resistance cannot be improved.






Obviously, this is because when chromium is used for alloy steel, the type of surface oxide becomes similar to the surface oxide formed on pure chromium metal. This tightly attached chromium-rich oxide protects the surface and prevents further oxidation. The oxide layer is very thin, and the natural luster of the steel surface can be seen through it, which makes the stainless steel mesh belt a surface thing. In addition, if the surface layer is damaged, the exposed steel surface will react with the atmosphere to repair itself and reform the oxide "passivation". Continue to play a protective role.

Therefore, all elements of the stainless steel mesh belt have a common feature, that is, the chromium content is greater than 10.5.