When an electroplating factory uses the high-speed matte tin additive, what role does the free acid in the plating solution play? In this article, we will explore this in detail.
First of all, we need to understand where the free acid comes from. It is provided by the methylsulfonic acid component in the plating solution. The free acid is indispensable in the plating solution. It can ensure the conductivity of the plating solution, prevent the dissolution of methylsulfonic acid tin, and enable the anode to dissolve normally into divalent tin ions.
When the concentration of free acid is too low, the conductivity and uniform coating ability of the plating solution will decrease, resulting in uneven coloration of the product (both the front and back surfaces). It is recommended to use a slightly higher content of methylsulfonic acid, which will help improve the dispersion of the plating solution.
However, the content of methylsulfonic acid should not be too high. Although it does not have a significant negative impact on the electrolyte when the content is high, it does not bring about any obvious improvement in the quality of the coating. Moreover, it may reduce the current efficiency of the cathode and cause hydrogen evolution at the cathode.
So, how should the content of methylsulfonic acid be controlled? When using the high-speed matte tin plating additive, in the high-speed continuous plating process, it is generally necessary to keep its content at 100g/L.
In the high-speed matte tin plating process, in order to ensure the uniformity of the plating layer and improve production efficiency, in addition to controlling the components of the plating solution such as conductive salts accurately, it is also necessary to use additives. The additives play a significant role in the plating solution. Adding the high-speed matte tin plating additive Sn-827 from Bigely helps to produce a uniformly thick plating layer and also improves the cathode current efficiency.
About us
Guangdong Bigely Technology Co., Ltd. ,founded in 2003, is a high-tech enterprise integrating R & D，production, sales and service, specializing in the production of electroplating chemicals. As a fast growing electroplating chemicals supplier in China, our products are widely used to meet the plating needs of different industries and exported to many countries from all over the world. They can meet the environmental protection standard after use, mainly used in automobile parts, sanitary ware, electronic products, hardware, furniture, building accessories and other fields.
If you need our high-quality electroplating additives, please contact us. We can provide you samples for test, and also provide a series of services.
