The manufacturer of En10210 pipe tells you that in the production process of seamless steel pipes, the method of using acid solution to remove oxide scale and rust on the surface of steel is called pickling. So how does the seamless steel pipe pickling process work? Let's take a look!

1. Commonly used media for seamless steel pipe pickling:
Sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid. When pickling, be sure to add pickling corrosion inhibitor to prevent the acid from corroding the metal.
2. Seamless steel pipe pickling process
The manufacturer of En10210 pipe tells you that there are mainly dip pickling method, spray pickling method and acid paste rust removal 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. The manufacturer of En10210 pipe tells you that 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 En10210 pipe tells you that because acid has a great corrosion effect on metals, it is necessary to add corrosion inhibitors. 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. 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 the analysis of acidic samples.
3. Seamless steel pipe pickling effect
Degreasing and derusting the surface of precision seamless steel pipes to prepare for the next process. The manufacturer of En10210 pipe 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 and aluminum pipe-oiling), using the old technology- Copper plating), and then drawing and deep processing. The manufacturer of En10210 pipe tells you that if the steel pipe is not pickled, there may be oxides and oil stains on the surface, and the phosphating liquid nuclear energy cannot remove them, and the quality of phosphating will be reduced.