Rostfri stålplåt är faktiskt en produkt som inte är utsatt för korrosion. Om det inte är någon allvarlig situation är det omöjligt för någon produkt att skyddas från korrosion. Om vår rostfria plåt är korroderad kan det påverka dess normalitet. Använd, så vi måste fortfarande vidta några förebyggande åtgärder för att undvika denna situation. Låt oss först förstå vilka faktorer som orsakar korrosion av rostfria stålplåtar?
一) Electrochemical corrosion
The scratches caused by the contact of the stainless steel sheet with the carbon steel parts, and then form a galvanic cell with the corrosive medium, which will cause electrochemical corrosion. If the pickling passivation effect is not good, the passivation film on the surface of the plate will be uneven or too thin, which will easily cause electrochemical corrosion, cutting slag, splash and other rusty substances to adhere to the plate, and then form with corrosive media The primary battery, which produces electrochemical corrosion. Unclean pickling passivation cleaning results in chemical corrosion products between the remaining pickling passivation residue and the plate, and then electrochemical corrosion with the plate.
2) Chemical corrosion
Under certain conditions, a lot of oil, dust, acid, alkali, salt, etc. adhering to the surface of the stainless steel sheet will be converted into corrosive media and chemically react with some components in the sheet, resulting in chemical corrosion and rust. The cleaning and pickling passivation is not clean enough to cause residual liquid to be retained, which directly corrodes the plate. The surface of the plate is scratched, which leads to the destruction of the passivation film. Therefore, the protective ability of the plate is reduced, and it is easy to react with chemical media, causing chemical corrosion and rust.