How to carry out the pickling process for seamless steel tube?
In the rolling process of seamless steel tubes, especially precision seamless steel tubes, the pickling process is very important to remove the oxide scale and rust on the surface. So how does pickling of seamless steel tube work?

seamless steel tube

The method of removing scale and rust on the surface of steel with an acid solution is called pickling. Iron oxides such as scale and rust (Fe3O4, Fe2O3, FeO, etc.) chemically react with the acid solution to form salts, which are dissolved in the acid solution and removed. Pickling acids include sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, and mixed acids.

Common media for pickling of precision seamless steel tubes:
Sulfuric acid, nitric acid, phosphoric acid, and hydrofluoric acid. When pickling, be sure to add a pickling inhibitor to prevent the acid from corroding the metal.