Electrolytic polishing is through the control of the current density, solution viscosity several temperature, so that the metal in the electrolytic solution selective dissolution (low concavity into the obtuse
State and raised parts of the active solution) combined with the solution of brightening agent and anodic polarization, to achieve the purpose of electrochemical smoothing and polishing.
Electrolytic polishing process
1. First of all, using mechanical polishing and polishing equipment and workpiece surface of the oxidized skin and
various surface defects, so that the surface to be dealt with initially to achieve a certain degree of roughness.
2. Electrolysis is used to further improve the surface finish of the treated surface.
Mechanical polishing is the macro-elimination of the surface of the oxide skin and a variety of defects, while electrolytic
polishing is a microscopic leveling process to further improve the physical and chemical properties of the surface.
Advantages of electrolytic polishing
1. As electrolytic polishing has electrochemical leveling and brightening effect, the surface roughness value can reach Ra0.05 (▽12), and the reflectivity can reach
more than 90%. Therefore, it can prevent the surface of the equipment from hanging materials, sticking to the wall and other phenomena.
2. Electrolytic polishing for anode non-uniform dissolution process, and in the passivation area, so the metal surface can achieve a good passivation effect, and in
Surface formation of uniform dense chromium salt film, greatly improving the resistance to environmental corrosion.
3. Electrolytic polishing eliminates the phenomenon of surface stress concentration, while eliminating the metal surface due to the grinding of the line into the Bayer Pei layer, improving the physical and chemical properties of the equipment
and the surface of the workpiece.
Scope of application of electrolytic polishing
Because of the high cost of electrolytic polishing, high technology, difficult to operate and not easy to form an automated, it is only used for some of the surface performance requirements of high
equipment and workpiece (such as: biochemical and pharmaceutical equipment, chemical polymerization reaction kettle, aerospace parts, food, cosmetic equipment, etc.).