Pickling Passivation Methods of Seamless Pipe

Pickling passivation impregnation method of seamless pipe. Stainless steel pipelines, elbows, small pieces, etc. The most suitable method. And the best treatment. Because the treatment can be fully immersed in pickling passivation solution, pickling passivation seamless pipe surface reaction is complete, passivation film dense uniform. The method is suitable for continuous batch operations, but the concentration of solution reaction with the need to continue to add new liquid. The disadvantage is the acid tank shape and capacity constraints, not suitable for large-capacity equipment and the shape is too long and too wide pipeline; long-term solution will not have volatile and other reasons the effect of decline, the need for special venues, acid pool and heating equipment.

Pickling passivation seamless pipe method. Stainless steel pickling passivation paste has been widely used in the country and a series of products available, manual operation, suitable for on-site construction, stainless steel chemical tank weld treatment, welding discoloration, corner dead angle, the back of the escalator and a large area of??smear passivation be applicable. The advantages of the ointment method is that it does not require special equipment and site, heating equipment is not needed, and the field operation is flexible. The pickling passivation is completed once and the independence is strong. The passivation paste has a long shelf life and is coated with a new passivating paste use, the surface layer of passive after the end of the reaction is stopped, not easy to corrosion, not subject to subsequent flushing time limit, weld and other weak links can also be strengthened passivation. The disadvantage is that workers operating environment is poor, labor-intensive, high cost, less effective treatment of stainless steel pipe wall, the need to combine other methods.

Pickling passivation seamless pipe spray method. Suitable for a fixed site, closed environment, a single product or internal structure of the simple equipment pickling passivation, such as sheet pickling line spray process, stainless steel chemical containers, can be used for pickling container wall. Its advantages are continuous operation speed, simple operation, less impact on workers corrosion, higher solution utilization. This method is more restrictive conditions, such as:1, The container may not have residues, impurities and so on.2, Pickling liquid in the container to stay too long, will lead to corrosion caused by the reaction of stainless steel, it must be continuous operation, ready to wash a lot of water, in case of power failure, no water, downtime and other serious consequences.3, Waste acid, wastewater discharge must have a larger container in full bloom.4, With the increase of reaction time and the increase of impurities in the solution, the active ingredient of the pickling solution is gradually reduced, and the solution concentration must be checked at any time to replenish the new solution.

A worker from a steel pipe company, which is located in China.