Why should the anode current density be lower than 2 amperes per square decimeter when using acid tin plating brighteners?
Anode and anode current density
The anode uses pure tin with a high purity (above 99.5%). If the anode current density is too high, a dark insoluble film will be formed (like soil), turning into sludge and leaving the anode. It will be suspended in the plating solution. The greater the anode current density, the lower the anode current efficiency, the more severe the oxygen evolution, and the more oxide sludge is produced.
Therefore, when using Bigely acid tin plating brightener Sn-807, we recommend that the anode current density should be lower than 2 amperes per square decimeter. This can prevent the plating solution from becoming turbid. When using the anode bag, it is necessary to ensure that the concentration of sulfuric acid in the bag does not decrease, otherwise it will have a negative impact on the plating solution.
The function of acid tin plating brightener
Without adding the acid tin plating brightener Sn-807 by Bigely, the dispersion ability of the plating solution would be poorer, resulting in dendritic deposits. After adding it, the precipitated substances can be made finer and smoother, and the current density range can be expanded.
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.
