Stainless steel has the ability to resist atmospheric oxidation, but also has the acid, alkali, salt corrosion of the medium capacity. However, its corrosion resistance is the size of its own chemical composition of steel, plus the mutual state, the use of conditions and the type of environmental media and change.(welding overlay,flange,pipe spooling)
Such as the 304 flange, in a dry and clean atmosphere, there is absolutely excellent resistance to corrosion, but to move it to the beach area, in the sea fog containing a lot of salt, it will soon rust, and 316 flange The performance is good. Therefore, not any kind of stainless steel, in any environment can be corrosion-resistant, non-rusting.(welding overlay,flange,pipe spooling)
Stainless steel surface deposits of deposits containing other metal elements of dust or heterogeneous metal particles in the humid air, the condensate between the attachment and the stainless steel, the two connected into a micro-cell, triggering the electrochemical reaction, protection Membrane damaged, called electrochemical corrosion.