First of all, we must understand what is pickling: the […]
First of all, we must understand what is pickling: the method of using an acid solution to remove oxide scale and rust on the surface of the steel is called pickling. Acids for pickling include sulfuric acid, hydrochloric acid, phosphoric acid, and mixed acids.
The pickling process is to remove the surface oxide scale, and then go through lubrication treatment (carbon steel-phosphorous saponification, stainless steel-butter lime, copper and aluminum pipe-oiling), using the old technology-copper plating), and then deep drawing processing. If the seamless pipe is not pickled, there may be oxides and oil stains on the surface, and the nuclear energy of the phosphating solution cannot remove them, and the quality of phosphating will be reduced. Moreover, in the manufacturing process of seamless pipes, after many processes, if you are not careful, it will leave scars on the surface of seamless pipes, which will reduce the corrosion resistance of parts and directly affect the service life.
In order to improve the corrosion resistance of Ferritic Stainless Steel Seamless Pipe And Tube the service life of the product, the seamless pipe must be pickled and passivated to form a protective film on the surface.