Primary methods for pickling precision seamless tubes:
Precision seamless steel tubes are mainly pickled using immersion pickling, jet pickling, and acid paste rust removal methods. Immersion pickling is generally more commonly used, while the jet method can be adopted for large-scale production. Steel parts are typically pickled in a 10% to 20% (by volume) sulfuric acid solution at a temperature of 40°C. When the iron content in the solution exceeds 80g/L, or 215g/L, the pickling solution should be replaced. At room temperature, steel is pickled using a 20% to 80% (by volume) hydrochloric acid solution, which is less prone to over-corrosion and hydrogen embrittlement. Due to the significant corrosive effect of the acid on metal, corrosion inhibitors need to be added. After cleaning, the metal surface becomes silver-white, and the surface is passivated, enhancing the corrosion resistance of stainless steel. The main pickling method for Wulan Buqa precision seamless steel tubes is knowledge
To eliminate adsorption on the diatomite carrier surface, refine tubes, and reduce tailing of chromatographic peaks, the carrier must be acid-washed or alkali-washed before use. Acid-washing involves boiling the carrier in 6mol/L hydrochloric acid for 2 hours or heating it in concentrated hydrochloric acid for 30 minutes, then filtering, rinsing with water until neutral, and drying. Acid-washing can remove impurities such as iron, aluminum, calcium, and magnesium on the surface but cannot remove silanol groups. Acid-washed carriers are suitable for analyzing acidic samples. The primary method of acid-washing for Wulanbuqita precision seamless tubes is...
Surface degreasing and descaling of precision seamless tubes are performed to prepare for subsequent processing. The main method of pickling for Wulanbuta precision seamless tubes is solely during the production process, where pickling is used to remove surface oxidation scale. After lubrication treatment, deep processing is conducted. Without pickling, the surface of precision seamless tubes may have oxides and oil stains, and the phosphating solution may not remove them, thus lowering the quality of the phosphating.