1. Chemical polishing: Let industrial oxalic acid dissolve preferentially in the concave part of the surface of the micro-protruding part of the chemical medium.

2. Electrolytic polishing: The surface is smooth by selectively dissolving small projections on the surface of the material.

3. Mechanical polishing: The polishing method of smooth surface is obtained by removing the convex part of polished material by plastic deformation.

4. Ultrasound polishing: The workpiece is put into the industrial oxalic acid suspension and placed together in the ultrasonic field. By means of oscillation, the workpiece is grinded and polished on the workpiece surface.

5. Fluid polishing: It relies on abrasive particles to wash the surface of the workpiece to achieve the purpose of industrial oxalic acid polishing.

6. Magnetically abrasive polishing: Magnetically abrasive polishing is the use of magnetic field in the formation of brushes, polishing sheets on the workpiece grinding processing.

What are the dissolution methods of oxalic acid?

1. There is no need to lower the temperature when dissolving. After one dissolution, the solution with higher concentration can be obtained by cooling down again.

2. When dissolving oxalic acid, it is necessary to stir while discharging. Too long time in static water or pouring it into water all at once will lead to caking and slow dissolution.

3. The higher the temperature is, the higher the solubility is, and the higher the concentration of the solution is obtained. However, it is important not to put too much oxalic acid into the solution, because once the solubility of the solution is saturated, it will not be dissolved again, which will agglomerate and affect the effect.

Oxalic acid is corrosive and releases heat continuously in the process of dissolution, so when dissolving, it needs to be stirred continuously and evenly in order to dissipate heat while being able to dissolve sufficiently.

What are the tricks in the distillation of oxalic acid

1. In the distillation process of refined oxalic acid, the distillation temperature should be strictly controlled and the amount of steam should be well controlled.

2. If the steam quantity is too large and the temperature is too high, the high boiling point substance will be taken out from the top of the tower, resulting in impurity of refined oxalic acid. If the steam volume is too small and the temperature is too low, the distillation of refined oxalic acid is slow, which affects the process.

3. In the process of distillation, flushing should be avoided in order to keep the operation stable.