In the plating process, the use of acid copper brightener can improve the appearance of the layer brightness, increase the flatness of the copper layer, but when the brightener is used in excess, it will bring a series of problems to the quality of the layer and the plating process. Below we briefly analyze the possible effects of excessive acid copper brightener.
First of all, acid copper brightener contains a variety of organic substances, which can be adsorbed on the cathode surface (i.e., the surface of the workpiece to be plated) under appropriate concentration conditions, so that the copper ions can be uniformly deposited on the surface of the workpiece under the action of the electric current. However, when the brightener is too much, too much organic material will form too thick adsorption layer, which will affect the reduction and deposition of copper ions, resulting in holes, pinholes, blistering and uneven deposition of defects in the plating layer.
Secondly, too high concentration of acid copper brightener will lead to blackening of the plated layer in the low current area (at the edges or corners of the plated parts). Due to the surface active effect of organic brightener, it will form a thicker layer in the low current density area, which will affect the color of the plated layer and reduce the appearance quality of the product.
In addition, the excessive use of acid copper brightener will also increase the viscosity of the plating solution, reduce its mobility, affect the diffusion of solutes, which leads to a decrease in current efficiency. This will not only slow down the plating speed, but also increase the production cost, and due to the uniformity of the plating layer becomes poor, may lead to the performance of the product is reduced, the production of products do not meet the quality requirements.
Finally, excessive acid copper brighteners can also contaminate plating baths, increasing bath maintenance costs and disposal difficulties. Maintaining the proper concentration of brightener is very important in the operation of the plating line and needs to be controlled by regular analysis and addition of fresh plating solution to ensure the stability of the acid copper plating bath and the consistency of the plating process.
To summarize, although Bigely acid copper brightener can improve the appearance quality of the plated layer, its dosage must be strictly controlled, and you can consult the technical engineer for the dosage. Excessive amount will affect the plating quality and plating production.
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