Network cabinets problem maintenance measures

Network cabinets have what problem and maintenance measures, we often meet many problems, such as cabinet surface rust, or dust, so how do we solve?
surface contamination: adhere to the surface of oil, dirt, acid, alkali and salt into a corrosive medium, under certain conditions, such as the react with some of the stainless steel parts, chemical corrosion and rust.
surface scratches: various scratches on the destruction of the passivation membrane, lower the stainless steel protection ability, easy to react with chemical medium, chemical corrosion and rust.
cleaning: cleaning not clean after pickling passivation caused by residual fluid collection, direct corrosion of stainless steel ( Chemical etching) 。 :
carbon pollution caused by contact with carbon steel cut and form a galvanic corrosion medium, resulting in electrochemical corrosion.
cutting: cutting slag, spatter is easy to rust material such as adhesion and corrosion medium to form a galvanic cell, resulting in electrochemical corrosion.
baking school: flame heating area of the composition and microstructure change and uneven, and form a galvanic corrosion medium, resulting in electrochemical corrosion.
welding: physical defects of welding area ( Bite edge, porosity, crack, incomplete fusion, incomplete fusion, etc. ) And chemical defects ( Coarse grains, poor chromium, grain boundary segregation, etc. ) Form a galvanic cell and produce electrochemical corrosion and corrosion medium.
material: stainless steel chemical defects ( Uneven ingredients, S, P, impurities, etc. ) And the surface physical defect ( Loose, sand holes, cracks, etc. ) Benefit and form a galvanic corrosion medium, resulting in electrochemical corrosion.
passivation: pickling passivation effect is not good cause uneven or thin stainless steel surface passivation membrane, easy to form the electrochemical corrosion.
clean: pickling passivation of the residual liquid with chemical corrosion of stainless steel products and stainless steel parts form the electrochemical corrosion.
stainless steel because of their special microstructure and surface passivation membrane, making it in the general case difficult to react with medium and corrosion, but not in no conditions can be corrosive. In the corrosive medium and incentives ( Such as scratches, splash, cutting slag, etc. ) Existing conditions, the stainless steel can also slow chemical and electrochemical reactions with the corrosive medium corrosion, and under certain conditions the corrosion speed is quite fast and produce corrosion phenomenon, especially pitting and crevice corrosion. The corrosion mechanism of stainless steel mainly for electrochemical corrosion.
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