In the production process of using methylsulfonic acid tin plating brightener, sometimes the bonding force of the tin-plated layer of the workpiece will be relatively poor, thus affecting the quality of the workpiece. What is the reason for this?
Bigolly Technology made an analysis based on the field experience and the characteristics of the product's methylsulfonic acid tin plating brightener Sn-819,there are four main reasons:
1. Poor pre-plating treatment.The pre-treatment process of the workpiece should be checked and adjusted to ensure that the oil stains on the surface of the workpiece are cleaned.If the operation is improper or the composition of the degreasing solution is out of balance, the adhesion of the coating may be poor due to the residual oil on the surface of the workpiece.
2. The plating solution is contaminated by metal impurities.If the metal impurity content in the plating solution is too high, too many impurities will be included in the plating layer, resulting in poor adhesion between the plating layer and the substrate.
3. The content of methanesulfonic acid in the bath is too low.When the content of methanesulfonic acid in the plating solution is too low, the plating solution will easily become cloudy, and the dispersing ability will decrease, so that the bonding force of the workpiece coating will become worse.
4. The cathode current density is too high.If the current density is too high, the coating at the corners of the workpiece is rough, and problems such as pinholes, scorching, and poor bonding will occur;At the same time, the consumption of brightener will increase, and the conversion rate of divalent tin to tetravalent tin will also be accelerated.
Therefore, we need to pay attention to these 4 points in the production process of using methylsulfonic acid tin plating brightener, which can effectively avoid the phenomenon of poor adhesion of the workpiece coating and reduce the occurrence of failures.If you are interested in methylsulfonic acid tin plating brightener, please contact Bigolly customer service, you can get free samples and detailed technical information!
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