Stainless steel wire rust and magnetic reasons

             1）Stainless steel is beyond 60% iron matrix in complex nickel molybdenum alloy elements such as high alloy steel, its greatest feature is the erosion resistant ability, but not absolute stainless steel does not rust. In some coastal areas or severe local air pollution, as the chloride ion content in the air is large, showing in the atmosphere of stainless steel appearance that there will be some rust, but these rust only in appearance, not the internal corrosion of stainless steel substrate. Like the material 304 stainless steel used in the ocean there is no corrosion resistance of 316L stainless steel wire can be good.          
             
             2）There are many varieties of stainless steel, according to the classification of their organizations are: austenitic steel, ferritic steel, martensitic steel, duplex stainless steel (austenite + ferrite). Most of the stainless steel with micro magnetic, and therefore, the use of magnet adsorption is not a scientific way to identify stainless steel. Austenitic steel is generally micro magnetic, like 301 stainless steel, 304 stainless steel, 316L stainless steel, 321 stainless steel, 303 stainless steel rods are BITAUTO austenitic steel. Ferritic steels are ferromagnetic.          
             
             3）According to the inherent characteristics of various types of stainless steel, in the selection of materials to understand the use of the product, to select the appropriate stainless steel materials.        
             4）Stainless steel will rust under certain conditions. Stainless steel with atmospheric oxidation to that of Didang stainless steel, as well as in containing acid, alkali and salt of the medium is not easy to erosion - corrosion resistance. But its ability to resist erosion is the size of its own chemical composition of steel, add mutual form, the use of the premise and the type of media changes. Stainless steel is a thin layer formed by its appearance and the same precision solid chromium rich oxide film (protective film), infiltration of oxygen atoms and avoid continuous continuous oxidation, and anti corrosion ability. If there is a reason, which make the appearance of membrane destroyed will rust.