Electrolytic polishing principle is mainly: the metal ions on the workpiece and the phosphoric acid in the polishing solution to form a layer of phosphate film adsorbed on the surface of the workpiece, the mucosa in the convex at the thinner, concave thick, because the protrusion of high current density and the dissolution of fast, with the mucosal flow, bumps continue to change, the rough surface is gradually leveling process.
The workpiece is connected to the anode as the anode of the DC power supply. With lead, stainless steel and other electrolytic corrosion of the conductive material as the cathode, then the negative DC power supply. (Usually in sulfuric acid, phosphoric acid as a basic component), in a certain temperature, voltage and current density (generally less than 1 ampere / cm 2), the power of a certain time (usually tens of seconds to the A few points), the workpiece surface of the small convex part of the first dissolved, and gradually become smooth and bright surface.
Applicable to 304,316,316 L and other materials, stainless steel mirror polishing, polishing high brightness, gloss lasting.
Stainless steel tube features: high polishing efficiency, good quality, a few minutes can throw a high gloss. It can give priority to dissolve the metal surface deformation layer dislocation, hole accumulation and other potential organization, resulting in equipotential surface, so that the corrosion resistance of stainless steel greatly improved. Polishing requires voltage regulator, rectifier, electrolyzer and other devices.
Usage: the use of liquid, lead plate to do the cathode (negative), the workpiece to do the anode (positive), the temperature 60-80 degrees, the current density of 15-50 Amperes square meters, the voltage of about 10 volts, time 5 minutes. Process: chemical degreasing → hot water wash → cold water → electrolytic polishing → hot water wash → cold water → passivation → cold water wash → hot water wash → hot water wash Note: According to the actual situation, adjust part of the process.
