First of all, we need to know what is pickling: the method of using acid solution to remove oxide scale and rust on the surface of DIN 2445-1 ST52.4 seamless steel pipe is called pickling. Acid for pickling includes sulfuric acid, hydrochloric acid, phosphoric acid and mixed acid.
The pickling process is to remove the oxide scale on the surface of DIN 2445-1 ST52.4 seamless steel pipe, then after lubrication treatment (carbon steel phosphorus saponification, stainless steel avocado lime, copper aluminum pipe oil coating), using the old process - copper plating), and then deep drawing.
If the DIN 2445-1 ST52.4 seamless steel pipe is not pickled, there may be oxides and oil stains on the surface, and the phosphating solution can not remove them, and the phosphating quality will be reduced. Moreover, in the process of seamless pipe manufacturing, if we do not pay attention to it, it will leave scars on the surface of DIN 2445-1 ST52.4 seamless steel pipe, which will reduce the corrosion resistance of parts and directly affect the service life.
In order to improve the corrosion resistance of DIN 2445-1 ST52.4 seamless steel pipe and prolong the service life of the product, pickling and passivation must be carried out on the surface of DIN 2445-1 ST52.4 seamless steel pipe to form a protective film on the surface.
