What are the differences between stainless steel electrolytic polishing and electrochemical polishin

The characteristics of electrolytic polishing: Electrolytic polishing is a surface treatment method that achieves the purpose of polishing and cleaning the surface by utilizing the selective anodic dissolution of stainless steel in the electrolyte. 

It has the following advantages:

(1) Significantly improves the surface corrosion resistance. Due to the selective dissolution of elements by electrolytic polishing, a dense and solid chromium-rich transparent film is formed on the surface, and an isoelectric surface is formed, thereby eliminating and reducing micro-cellular corrosion. 

(2) The microscopic surface after electrolytic polishing is smoother and has a higher reflectivity compared to that after mechanical polishing. This results in the equipment being free from sticking to the walls, no material accumulation, and easy cleaning. The surface roughness of the workpiece is reduced by approximately 1/1000 inch, meeting the GMP and FDA standards. 

(3) Electrolytic polishing is not limited by the size and shape of the workpiece. It can be applied to workpieces that are not suitable for mechanical polishing, such as the inner walls of slender tubes, elbows, bolts, nuts, and the inner and outer walls of containers. 

Electrolytic polishing is superior to mechanical polishing:

A. It provides a condition of uniform potential on the surface;

B. It is less likely to trap contaminants;

C. It can form a more corrosion-resistant transparent solid salt film on the surface;

D. It does not produce the Beilby layer. 

Characteristics of electrochemical polishing: Electrochemical polishing is a process of surface finishing and polishing using the principle of metal electrochemical anode dissolution. It combines electrochemical pre-polishing and mechanical fine polishing in an organic manner, leveraging the strengths of both electrochemical and mechanical polishing. It is not limited by the hardness and toughness of the material and can polish various complex-shaped workpieces. Its method is similar to electrolytic grinding. 

Advantages: The processed stainless steel is more mirror-like. The function of the electrolytic wire is applicable to high-voltage insulated W locking pins, R pins, woven metal nets, sealing gaskets, special industries, steel composite sheets, and high-end decorations, spring springs, handicrafts, etc.