The manufacturer of Seamless steel pipe for ship building tells you that in the production process of seamless steel pipe, the method of using acid solution to remove oxide scale and rust on the surface of steel is called pickling. How does the seamless steel pipe pickling process work? The manufacturer of Seamless steel pipe for ship building will take you to find out!

1. Commonly used media for seamless steel pipe pickling:
Sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid. The manufacturer of Seamless steel pipe for ship building tells you that you must add a pickling corrosion inhibitor during pickling to prevent the acid from corroding the metal.
2. Seamless steel pipe pickling process
The manufacturer of Seamless steel pipe for ship building tells you that there are mainly immersion pickling method, spray pickling method and acid paste derusting method. Generally, the dipping and pickling method is generally used, and the spray method can be used in mass production. Steel parts are generally pickled in a 10%-20% (volume) sulfuric acid solution at a temperature of 40°C. When the iron content in the solution exceeds 80g/L and the ferrous sulfate exceeds 215g/L, the pickling solution should be replaced. At room temperature, the steel is pickled with 20% to 80% (volume) hydrochloric acid solution to prevent over-corrosion and hydrogen embrittlement. The manufacturer of Seamless steel pipe for ship building tells you that since acid has a great effect on metal corrosion, it is necessary to add corrosion inhibitor. After cleaning, the metal surface becomes silvery white, and the surface is passivated to improve the corrosion resistance of stainless steel. In order to eliminate the surface adsorption of the diatomaceous earth carrier and reduce the tailing of the chromatographic peak, the carrier needs to be acid washed or alkaline washed before use. The manufacturer of Seamless steel pipe for ship building tells you that pickling is to soak the carrier with 6mol/L hydrochloric acid for 2 hours or heat and soak with concentrated hydrochloric acid for 30 minutes, filter, wash with water to neutrality, and dry. Pickling can remove iron, aluminum, calcium, magnesium and other impurities on the surface, but cannot remove silanol groups. The pickling carrier is suitable for analyzing acidic samples.
3. Seamless steel pipe pickling effect
The manufacturer of Seamless steel pipe for ship building tells you to degreasing and derusting the surface of precision seamless steel pipe in order to prepare for the next process. The manufacturer of Seamless steel pipe for ship building tells you that in the production process, 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 aluminum pipe-oiling), Use the old process-copper plating), and then conduct deep drawing processing. If the steel 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.