The pickling solution used in the pickling process of stainless steel is generally a mixture of various acids, mainly sulfuric acid, nitric acid and hydrofluoric acid. These mixed acids are highly corrosive and oxidizing, and the temperature of the corrosive medium is also relatively high. High, these put forward high requirements for the corrosion resistance of anti-corrosion materials. However, after the stainless steel reactor is pickled, passivation will occur. The solution is described below:
There are many anti-corrosion materials suitable for pickling of stainless steel reactors, among which epoxy resin and its modified resin are good. The principle of stainless steel pickling is to use acidic liquid to remove the oxide skin on the surface of the steel after pretreatment, remove the metal ions on the surface, and make it have a good finish.
The material forms of pickling include belt washing, tube washing, plate washing, line washing, etc. No matter what kind of pickling process, the stainless steel pickling production line process has strong corrosion in all links from production to waste water and waste gas recovery system. condition.
Therefore, the selection of anti-corrosion materials is directly related to the normal use of equipment, workshop floors, trenches, and environmental protection recovery systems for waste water and waste gas. The anti-corrosion of the floor and equipment of the stainless steel pickling production line is basically made of FRP material, and the main raw material (resin) of FRP is the key to directly determine the anti-corrosion effect. Therefore, the choice of resin directly affects the anti-corrosion effect. life.
