When we use galvanized trivalent chromium black passivator to produce, sometimes the black color of the passivation film of the workpiece is uneven, and some do not form a film on the edge of the workpiece.At this time, the appearance of the workpiece is very bad, and the corrosion resistance is also very poor.So, what causes this?
In the process of using alkaline zinc plating additives, we sometimes use CK-778 purifier to treat the plating solution, which can effectively remove heavy metal impurities and adsorb the decomposition products of additives, and has a good adsorption effect on oil stains and suspended solids.However, the end point of the plating solution treated with CK-778 purifying agent is not obvious during the titration analysis of zinc ions, which will lead to inaccurate analysis of zinc ions. What is the reason?
With the development of production technology in the electronic component industry, people have higher requirements for coating quality, and the requirements for product coating thickness, uniformity, hardness and brightness are higher.However, the ordinary tin plating process can not meet the needs of production, and the product performance is difficult to meet the requirements, which requires the use of high-speed tin plating additives.
When we use nickel plating additives for production, sometimes the plating solution is still turbid after repeated filtration, and a frosted coating will appear on the workpiece. What is the reason?
When we use nickel plating brighteners, we always encounter such a phenomenon: the workpiece is very clean in the pretreatment, but the plating layer has pinholes after nickel plating.So what details in the electroplating process will cause pinholes in the coating?
After we use acid copper plating brightener for a period of time, monovalent copper ions will be generated in the plating solution, which will affect the quality of the plating layer.Some customers will use hydrogen peroxide to treat the plating solution, but it will reduce the sulfuric acid content in the plating solution. Why?
