A friend consulted and said that during the production process of using nickel plating additives on their aluminum alloy workpieces, the coating of the workpieces may become rough. What is the reason for this?
Bigley Technology has analyzed the characteristics of nickel plating additives based on on-site experience and products, mainly including the following three points:
1. The cathode current density is too high. The current density of general nickel plating solution should be controlled within the range of 1-5A/dm2. Sometimes, in order to save time and obtain sufficient coating thickness, the cathode current density of the workpiece is increased, which makes the coating of the workpiece relatively rough and prone to burning.
2. The workpiece is contaminated with organic impurities. As production progresses, the decomposition products of additives and oil in the plating solution continue to accumulate. These impurities can affect the quality of the coating, causing phenomena such as pinholes, roughness, and peeling. Therefore, during the production process, activated carbon should be regularly used to treat the plating solution to reduce the impact of organic impurities.
3. The influence of solid particle impurities in the plating solution. These solid particle impurities come from anode mud, undissolved boric acid, hydroxide precipitation in the plating solution, and dust in the air. These impurities can be mixed in the coating, leading to roughness, pitting, and other phenomena. During the production process, these particulate impurities can be removed by filtration. In addition, using pure water for tank preparation and addition can control the calcium ion content in the plating solution.
Therefore, in the production process of using nickel plating additives, aluminum alloy workpieces should pay attention to the above three points when the coating appears rough, and solve the problem as soon as possible to reduce losses. If you are interested in nickel plating additives, please contact Bigley customer service for free samples and detailed technical information!
If you want to learn more about nickel plating, you can click to view the "Common problem".