Several factors affecting the galvanizing effect of galvanized folding table

- Apr 08, 2020-

In order to enhance the use effect of the folding table, the folding table manufacturer will galvanize it, and according to relevant people, when galvanizing it, there are several factors that will affect its galvanizing effect:

1. The content of sodium hydroxide is low. If the sodium hydroxide content is low, the current density is not high and the anode is passivated.

2. Anode passivation. The effective area decreases, affecting the normal distribution of current.

3. The workpiece is over-corroded. Decreasing the hydrogen precipitation potential, hydrogenation on the surface of the workpiece accelerates the current efficiency, thereby affecting the zinc deposition rate. An appropriate amount of corrosion inhibitor should be added to the pickling solution. If the scale is too thick at the local area, remove it first by mechanical methods. During the pickling process, check more.

4. The area of the plated parts is underestimated, and the current density delivered during plating appears to be too small. Or the workpiece suspension method is improper, the distance from the zinc anode is too large, the position should be adjusted.

5. The content of additives in the plating solution is low. The low content of additives will affect the dispersion ability, and the coating layer is too thin locally.

6. The temperature of the plating solution is low. When the temperature of the plating solution is low, the current density of the distribution is reduced accordingly, and the deposition speed of the plating layer is also necessarily reduced.

7. The content of sodium hydroxide in the plating solution is too high. When the sodium hydroxide content is too high, the current efficiency decreases accordingly.

8. The workpiece is too tightly bound. When galvanizing, the workpiece is partially shielded and the coating is too thin.

9. High carbon content in the workpiece. High carbon steel, cast iron, etc. will reduce the hydrogen precipitation potential, the hydrogen evolution on the surface of the workpiece is accelerated, and the current efficiency is reduced.

10. Poor conductivity. The current is consumed on the wire, and the current distributed to the workpiece surface is too small.

11. The pre-treatment is not thorough. There is an oxide film on the surface of the workpiece, which affects the normal deposition of zinc.