Polishing process of black steel seamless pipe

Commonly used black steel seamless pipe polishing methods include mechanical polishing, chemical polishing, and electrochemical polishing.

Mechanical polishing

The advantage is that the leveling of the parts after processing is good, and the brightness is high. The disadvantage is that the labor intensity is high, the pollution is serious, and the complex parts cannot be processed, and the gloss cannot be consistent, the gloss does not last for a long time, and it is stuffy and rusted. It is more suitable for processing simple parts, medium and small products.

Chemical polishing

Chemical polishing is another common finish to metal surfaces. It will chemically etch the metal parts in the process in a specific solution, etch through the solution and level the metal surface for a brighter surface. Chemical polishing can be used for surface finishing of instruments, aluminum reflectors and other components or coatings for decorative finishing. The advantages are that the investment in processing equipment is less, the complex parts can be thrown away, the speed is high, the efficiency is high, and the corrosion resistance is good. The disadvantage is that the brightness is poor, there is gas overflow, ventilation equipment is required, and heating is difficult. It is suitable for processing small batches of complex parts and small parts that do not require high brightness.

Electrochemical polishing

Electrochemical polishing can be used to replace complex mechanical polishing many times, especially for parts with complex shapes and difficult to handle by mechanical methods. Its advantages are that the mirror gloss is maintained for a long time, the process is stable, the pollution is less, the cost is low, and the corrosion resistance is good. The disadvantages are high pollution resistance, large one-time investment in processing equipment, tooling and auxiliary electrodes for complex parts, and cooling facilities for mass production. Suitable for mass production, mainly used in high-end products, export products, products with tolerances, its processing technology is stable, and the operation is simple.

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