Four reasons why the edges and corners of workpieces are prone to burning during the production process using sulfate tin plating additives

In the production process of using sulfate tin plating additives, the edges and corners of the workpiece are prone to burning. What is the reason for this?

Bigely Technology has conducted an analysis based on on-site experience and product characteristics, mainly for the following four reasons:

1.The cathode current density is too high. The cathode current density is high, and the coating is loose, rough, and porous. The edges and corners are prone to burning, and it is also prone to brittleness. The current density should be reduced to within the process range.

2.The concentration of divalent tin is too low. If the concentration of divalent tin is too low, the cathode current density will be low, production efficiency will also decrease, and the coating is prone to burning. It is necessary to analyze and adjust the concentration of plating solution components in a timely manner within the process range.

3.The cathode movement speed is not sufficient. The sulfate electroplating tin plating process cannot use air agitation, and requires cathode movement to obtain a bright coating, which can improve production efficiency. The cathode movement speed is not sufficient, the coating will be rough, and it is easy to burn. The movement speed should be adjusted properly.

4.Insufficient softener in the plating solution. Softener can improve the dispersion ability of plating solution, enhance cathodic polarization, refine coating crystallization, and reduce pores. When the softener in the plating solution is insufficient, the dispersion ability of the coating decreases, the crystallization becomes rough, and it is easy to burn. An appropriate amount of softener should be added to the process range.

So, we need to pay attention to the above four points, which can effectively avoid burning of the edges and corners of the workpiece, improve production efficiency, and better use sulfate tin plating additives. If you are interested in sulfate tin plating additives, please contact Bigely customer service for free samples and detailed technical information!