Electrochemical polishing of polishing machine technology
2021-04-12 22:41:51

Nowadays, the field of polishing machine is more and more extensive. In the past, metal polishing was mainly used, but now it involves ceramics, glass, wood and so on. Electrochemical polishing is also known as electrolytic polishing. Its polishing principle is similar to chemical polishing, and it also produces smoothness by selectively dissolving tiny protrusions on the surface of parts. The method is to put the workpiece into a prepared electrolyte solution, the workpiece uses an anode, and a corrosion-resistant conductive material with good corrosion resistance is used as an auxiliary cathode, and anode electrolysis occurs on the surface of the workpiece after power-on.

According to the principle of tip discharge, the tiny protrusions on the surface of the workpiece dissolve. Then, the dissolved product and the electrolyte on the surface of the workpiece form a viscous film layer with high resistance. The film layer of the small protrusions is thick and has a large resistance, and the dissolution rate is relatively slow. After a short period of electrolysis, the protruding parts are dissolved to flatten the concave parts, so that the surface roughness is reduced and smoothness is achieved. Electrochemical polishing can obtain different rough surfaces by controlling the intensity and time of the current, to meet the requirements of the workpiece surface requiring rough or fine polishing or even mirror polishing. Therefore, it has been widely used.