First, Pickled and Passivated Seamless Steel Pipes
1. Process Principle: Pickling removes oxide scale, rust, and other impurities from the surface of seamless steel pipes using an acidic solution. Passivation forms a dense passivation film on the surface of the pickled seamless steel pipe, enhancing its corrosion resistance.
2. Application Areas: Widely used in machinery manufacturing, petrochemical, power, shipbuilding, and other industries. Suitable for various pipeline systems requiring corrosion resistance of seamless steel pipes.
3. Advantages: Improves the corrosion resistance of seamless steel pipes, extending their service life; improves the surface quality of seamless steel pipes, making them cleaner and smoother; enhances the adhesion of seamless steel pipes to coatings or other materials.
Second, Pickled and Phosphated Seamless Steel Pipes
1. Process: First, pickling removes surface impurities, followed by phosphating treatment, forming a phosphate protective film on the surface of the seamless steel pipe. This phosphating film improves the wear resistance, lubricity, and corrosion resistance of the steel pipe.
2. Applicable Scenarios: Commonly used in industries such as automobile manufacturing, machining, and construction, as raw materials for structural components, drive shafts, hydraulic systems, etc.
3. Performance Characteristics: It has excellent corrosion resistance, especially in harsh working environments such as humid, acidic, and alkaline corrosive media, effectively protecting steel pipes from corrosion; the phosphating film can also improve the surface hardness of seamless steel pipes, enhance their wear resistance, and reduce wear during use.
Third, 20# Steel Pickled and Passivated Seamless Steel Pipe
1. Material Characteristics: 20# steel is a high-quality carbon structural steel with good strength and toughness. Its carbon content is moderate, resulting in good overall performance and ease of processing, such as welding and cutting.
2. Advantages after Pickling and Passivation Treatment: After pickling and passivation treatment, 20# steel seamless steel pipes maintain their original mechanical properties while significantly improving corrosion resistance, making them suitable for more applications requiring high corrosion resistance, such as pipelines in cold storage refrigeration systems.
3. Applications in Cold Storage: Cold storage environments are characterized by high humidity and low temperatures, requiring steel pipes with high corrosion resistance. 20# pickled and passivated seamless steel pipes can resist corrosion from condensate, refrigerants, and other media in cold storage, ensuring the normal operation of the refrigeration system and reducing pipe leaks and other malfunctions.
4. Cold Storage Processing
Cold Storage Structure and Composition: Cold storage mainly consists of the storage body, refrigeration system, insulation system, and control system. The storage body includes walls, roof, and floor, typically constructed with materials offering good insulation performance. The refrigeration system is the core of the cold storage, responsible for lowering the internal temperature, and includes components such as compressors, condensers, evaporators, and expansion valves. The insulation system reduces heat exchange between the inside and outside of the storage, improving its insulation effect. The control system monitors and regulates parameters such as temperature and humidity.
The Role of Pickled and Passivated Seamless Steel Pipes in Cold Storage Processing: In cold storage processing, pickled and passivated seamless steel pipes are primarily used for piping installation in the refrigeration system. These steel pipes are responsible for transporting refrigerants and require excellent corrosion resistance and sealing properties. Pickling and passivation of seamless steel pipes can effectively prevent refrigerant leakage, ensure the normal operation of the refrigeration system, and at the same time improve the service life of the steel pipes and reduce maintenance costs.
Post time: Nov-10-2025