Zinc-nickel alloy plating technology is excellent in terms of corrosion prevention performance, but in the actual production process, the plating solution will sometimes appear aging and yellowing phenomenon. This phenomenon not only affects the quality of plating layer, but also causes trouble to the production efficiency. The yellowing of zinc-nickel alloy plating solution is mainly related to the degradation of organic additives in the solution and the accumulation of impurities.
Zinc-nickel alloy additives play an important role in the plating process, as they improve the gloss, dispersion and corrosion resistance of the plated layer. However, these additives are gradually consumed or chemically altered during use. As the zinc-nickel alloy plating operation continues, additive degradation products gradually accumulate, resulting in a change in solution color. In addition, there is a gradual increase in the number of impurity ions in the plating solution, such as copper and lead ions, which, in combination with the organic degradation products, may also accelerate the yellowing and aging of the solution.
By regularly analyzing the composition of the plating solution, supplementing and adjusting the concentration of additives in a timely manner, the aging of the plating solution can be slowed down to a certain extent. The use of high-performance, stable Bigely zinc-nickel alloy additives to reduce the production of additive degradation products is also an effective means to extend the service life of the plating solution. In summary, the aging and yellowing of zinc-nickel alloy plating solution is the result of a combination of factors, reasonable control of the use of plating additives and maintenance of the purity of the plating solution is to maintain the long-term stability of the plating solution is the key.
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