Why does a precision cold-rolled stainless steel tube need polishing? In the production process of cold-rolled precision seamless steel tubes, the surface of the stainless steel tube is subjected to perforation, cold drawing, straightening, and precision cold rolling. These treatments result in appearance, texture, alloy composition, purity, and energy state. Changes.
When the manufacturing process is completed, the surface of the stainless steel pipe generally differs greatly in terms of structure and performance, and in most cases is the opposite of the base material.
For example, after the soft stainless steel seamless tube is processed by a precision cold rolling mill, the hardness of the surface of the steel pipe is increased, and the surface finish is about 320 meshes, that is, Ra ≤ 0.8 μm.
These damaged surfaces can be removed and electropolished to a certain depth without greater pressure, where the material is still in an impurity-free, original shape.
As a result, the surface properties can be increased to a certain degree within a single process step, which cannot be achieved with any other process.
With electrolytic polishing, the defective surface is removed and no more energy is introduced into the treated surface. Therefore, the potential of the electropolished surface is minimal, resulting in high bluntness and corrosion resistance. The deposits formed by the adhesion and catalysis processes are also significantly reduced.