Why is there yellow-green precipitation in nickel plating solution? This is the problem that a lot of electroplating factory masters consult, in order to help you as soon as possible to troubleshoot this fault, we write an article today to provide some ideas to solve.
Sources of the problems
The newly prepared nickel plating solution (bright nickel plating) is a green transparent liquid. However, after a period of use, some yellowish-green precipitates often appear in the plating solution, especially on objects such as anode bags, heating tubes, and tank walls.
Its main sources are:
(1) Nickel ions in the plating solution have some chemical reactions with sodium dodecyl sulfate, partially generating insoluble sodium dodecyl sulfate.
(2) The content of iron impurities has exceeded the standard, when the plating solution pH is in a high state, it will generate gelatinous precipitates.
(3) The decomposition products of nickel plating brightener and some organic impurities brought in by the workpiece. These products are suspended in the plating solution, adsorbed in the tank or other objects, in the liquid and air contact at the junction, after evaporation and concentration becomes particularly obvious.
If these problems are removed as soon as possible, faults such as plating pinholes can be avoided.
What are the solutions?
We need to take out the appropriate amount of plating solution, check the pH value with pH test paper (not greater than 6), add 5% mass fraction of sulfuric acid solution to adjust to the normal process specification, the next will be two possibilities.
Possibility I:
Suspension does not disappear, then it means that there are too many organic impurities in the plating solution.
Possibility II:
If the suspension has disappeared, then there are too many iron impurities in the nickel plating solution. It is then removed according to its regular treatment.
Conclusion
In the process of using nickel plating brightener in plating factory, due to various reasons, there will always be some plating faults that are difficult to deal with, therefore, when we choose the supplier of the potion, we need to find the kind of technical strength. As a supplier of nickel plating brightener and other products, Bigely can provide door-to-door technical services to help customers in the process of using the products, to help customers troubleshooting problems and ensure the smooth progress of production.
If you are interested in nickel plating brightener, please feel free to contact us.
