In the production process of using matte tin additives, the low area of the workpiece is prone to leakage of the plating, there are two points you need to pay attention to

Some customers have asked that in the production process of using matte tin additives, sometimes the workpiece low area coating is prone to leakage plating phenomenon, which is caused by what?

According to the field experience and the characteristics of the product's sulphate matte tin additive Sn-808, the following two points should be paid attention to in the production process:

1, the content of matte tin additive Sn-808 in the plating solution is seriously insufficient. The role of additives in the plating solution is to provide the dispersion ability of the plating solution, improve the cathode polarization, refine the crystallization, and make the workpiece obtain a good toughness and solderable tin coating. When the additive content is very low, due to the poor dispersion ability of the plating solution, it will affect the normal deposition of the tin layer in the low area of the workpiece, resulting in the phenomenon of coating leakage. Therefore, we should control the content of additives in the production process within the process range.

2, the content of sulfuric acid in the bath is too low. Sulfuric acid in the bath can improve the conductivity and dispersion of the bath, improve the cathodic polarization, refine the crystallization, and inhibit the hydrolysis of the divalent tin. When the sulfuric acid content is too low due to the poor conductivity and dispersion of the plating solution, the coating in the low area of the workpiece is prone to leakage plating phenomenon. Therefore, we should strictly control the content of sulfuric acid in the production process within the normal range.

Therefore, we should pay attention to these two points in the production process of using matte tin additives, and adjust the content of each component in the plating solution in time within the process range, to avoid the phenomenon of leakage of the plating layer, and to reduce the occurrence of failures. If you are interested in matte tin additives, please contact Bigely customer service for free samples and detailed technical information!