In the process of using sulfate tin plating brightener, some large areas of workpieces have white spots on the coating around the seam, which seriously affects the appearance and performance of the workpieces.What causes this phenomenon?
According to the field experience and the characteristics of the product sulfate tin plating brightener Sn-807, Bigolly Technology has analyzed the following three main reasons for this phenomenon:
1. The seam of the workpiece is very narrow, and it is difficult to wash after tin plating.Due to the residual plating solution or water at the seam of the workpiece, it is easy to appear white and blossoming around the seam of the workpiece.In this case, the width of the seam can be increased as much as possible within the process range to facilitate cleaning and water drying.
2. Due to the uncleanness of cleaning, there is plating solution or cleaning water residue at the seam of the workpiece, which leads to the phenomenon that the coating at the seam of the workpiece is white and flowery.In this case, the number of cleaning can be appropriately increased, and the cleaning water should be changed regularly. In addition, the hot water washing process can be added behind the cleaning water to clean the residual plating solution or water in the seam.
3. In the process of baking, due to the low baking temperature or short baking time, there is still liquid residue in the seam of the workpiece, resulting in the phenomenon of whitening and blossoming.In this case, the baking temperature should be appropriately raised and the baking time of the workpiece should be appropriately extended to ensure that there is no liquid residue at the seam of the workpiece.
Therefore, we should pay attention to the above three points in the production process of using sulfate tin plating brightener for large area workpieces to avoid white spots on the coating around the seam and reduce the loss caused by faults.If you are interested in sulfate tin plating brightener, please contact Bigolly customer service for free samples and detailed technical information!
If you want to know more about tin plating, you can check "Electroplating encyclopedia".