Stainless steel electrolytic polishing is a surface brightening treatment for stainless steel workpieces. The polished workpiece is used as the anode and the insoluble metal is used as the cathode. The two electrodes are immersed in the electrolytic tank at the same time. Direct current is passed to produce selective anode dissolution, and the surface of the workpiece is gradually flattened, thereby achieving the effect of increasing the surface brightness of the workpiece.
The principle of stainless steel electrolytic polishing is generally recognized as the mucous membrane theory. This theory is mainly that the metal ions detached from the workpiece and the phosphoric acid in the polishing liquid form a phosphate film adsorbed on the surface of the workpiece. This mucous membrane is thinner at the convex part and thicker at the concave part. Because the current density at the convex part is high, it dissolves quickly. As the mucous membrane flows, the concave and convex parts change continuously, and the rough surface is gradually flattened.
Anode and cathode materials
The cathode and cathode rods should be copper rods or copper tubes. The length of the copper tube is the length of the electrolytic cell plus 20 cm. The cathode plate should be lead plate. The lead plate is fixed on the cathode rod. The length of the lead plate is the cell height plus 10 cm. The width of the lead plate is determined by the cell length, generally 10 cm, 20 cm.
SS 310 Thick Wall Pipe
