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Precision Carbon Steel Pipe Pickling Process
In the rolling of smooth steel tubes, specifically in the manufacturing procedure of precision seamless steel tubes, just how does the acid pickling process proceed? Today, the mysterious veil is revealed for you!

Making use of an acid service to eliminate scale and also rust from steel surface areas is called pickling. Iron oxides (Fe3O4, Fe2O3, FeO, etc), such as ranges as well as corrosion, chemically respond with the acid service to form salts that are dissolved in the acid service and eliminated. Pickling acids consist of sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, and blended acids.

Generally fertilized pickling, jet pickling and acid paste corrosion elimination. Generally, the impregnation pickling approach is generally made use of, as well as the spray technique can be made use of in mass production. Steel parts are generally marinaded in 10% to 20% (by quantity) sulfuric acid option at a temperature level of 40 ° C. When the iron content in the option goes beyond 80g/L and also the ferrous sulfate surpasses 215g/L, the acid remedy ought to be changed. At room temperature level, pickling of steel with 20% to 80% (by quantity) hydrochloric acid service is not vulnerable to over-corrosion and also hydrogen embrittlement. Because of pickling, surface treatment, steel pickling of acid on metal deterioration, rust inhibitors require to be added. After cleaning, the steel surface comes to be silver white, and also the surface area is passivated to boost the deterioration resistance of the stainless steel.

In order to eliminate the surface adsorption of the diatomaceous planet carrier and minimize the tailing of the chromatographic peaks, the carrier should be acid-washed or alkali-washed previous to utilize. Pickling is accomplished by dipping the carrier with 6 mol/L hydrochloric acid for 2 hours or heating with focused hydrochloric acid for 30 mins, filtering, washing with water to nonpartisanship, and also drying. Pickling gets rid of pollutants such as iron, aluminum, calcium, and magnesium on the surface area but does not remove silanol groups. Marinading assistances are appropriate for the analysis of acidic samples.


Degreasing as well as derusting the surface of precision seamless steel tubes to plan for the next procedure. In the manufacturing process, the pickling process is to eliminate the surface area oxide skin, after the lubrication therapy (carbon steel - phosphorus saponification, stainless steel - tallow lime, copper light weight aluminum - fueled oil), with the old process - copper plating), as well as after that Execute deep processing. If the steel pipe is not pickled as well as there might be oxides and also oil on the surface area, the phosphating solution can not remove them and the quality of phosphating will certainly be lowered.

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