When using acid tin plating brightener, why rack plating allows the use of higher cathodic current density, but not barrel plating? The reason is that one is based on concentration polarization and the other is based on electrochemical polarization, if the current density of the rack plating system is used in the barrel plating system, then it is easy to cause plating failures. Therefore, it is necessary to explore, the cathodic current density of tin plating solution will have what effect on the coating? And how to control this process parameter for rack and barrel plating production?
Effect of cathode current density
Within the process allowable range, the control of cathode current density can be varied accordingly with the main salt concentration, plating solution temperature and the degree of flow of plating solution. Under the premise of not observing a large number of bubbles on the surface of the liquid, the current should be turned on as high as possible in order to improve the productivity and the quality of the plated layer.
The use of acid tin brightener production, when the cathodic current density is too high, the plating layer is loose, rough, porous, and may be brittle, the edge of the part is also prone to burn; when the cathodic current density is too low, it will reduce the rate of deposition and lead to the impact of the production efficiency, and can not get a mirror bright plating layer.
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 additives. As a famous electroplating additives source manufacturer in China, Bigely has over 20 years' experience in electroplating additives production and own production base of 5000 square meters. We can produce 15,000 tons of electroplating additives every year, which can fully meet the needs of customers.
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.
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