After electropolishing according to the normal process, the surface of the workpiece will show signs of yellowing. The reason for this phenomenon is that the stainless steel electrolytic polishing liquid remains on the surface and is not cleaned, causing the workpiece to be corroded. . There are two solutions to this problem:

1. Because many companies directly pass through clean water without neutralizing it, after the clean water is used repeatedly, the electrolyte remains In the water tank, there will be residual liquid medicine on the surface of the workpiece when passing water. Therefore, after electrolytic polishing, the workpiece needs to be neutralized and then cleaned with water to solve the problem of yellowing.

2. Soak the yellowed workpiece in 20% concentration of dilute nitric acid for two minutes.

Stainless steel electrolytic polishing

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 the cathode. Both poles are immersed in the electrolytic tank at the same time. Direct current is used to produce selective anode dissolution, and the surface of the workpiece is gradually leveled, thereby achieving the effect of increasing the surface brightness of the workpiece.