High Chrome White Iron Air Ports Mechanical Polishing: Mechanical polishing is divided into coarse polishing and fine polishing. Rough polishing is performed with tweed wool on an electric polishing disc rotating at 200-300 rpm. In the process of rough polishing, it is necessary to sprinkle coarse chrome oxide, aluminum oxide or magnesium oxide polishing liquid appropriately, and keep the wool on the polishing disc moist.

When polishing begins, sprinkle some polishing liquid from time to time. Then slowly reduce the pressure and reduce the concentration of the polishing solution until the fine grinding marks disappear, smooth and bright without black spots.
Roughly polished samples are washed with water and then finely polished. By fine polishing, the grinding marks left by rough polishing are removed, so that the grinding surface is bright and smooth.
The polishing machine used for fine polishing is basically the same as the equipment used for rough polishing, and its speed is 150-200 rpm.
High Chrome White Iron Air Ports point solution polishing: The metal ions detached from the workpiece and the phosphoric acid in the polishing solution form a phosphate film that is adsorbed on the surface of the workpiece. The current density at the starting point is high and the dissolution is fast. With the flow of the mucosa, the unevenness is constantly changing, and the rough surface is gradually flattened.