How to handle surplus or failed plating additives?

Many plating liquids are appended with additives, they will produce an analyte when the time out, it is bad for the plating, so we must be cleaned the plating tanks in a fixed cycle. If the plating surface is too light, the dispersion ability is often not so good, and it’s easy to cause the surface to peel off, even caused broken when under high voltage. Some operators did what they did according to the process requirements, but they did not catch the key point. The key point should be treated with hydrogen peroxide first, then heated(not heating the plating liquid first), and then added with any activated carbide. When there are many organic impurities, potassium permanganate is used for treatment. At this time should adjust the pH value of 3, and then heated to 60 ~ 80 °C, add the previously dissolved potassium permanganate, the amount of 0.3 ~ 1.59 / L or less, after stirring for more than 8h, filtered and adjusted The pH is in the normal range. If the plating liquid is red, we can use hydrogen peroxide to remove it.

Many plating liquids are appended with additives, they will produce an analyte when the time out, it is bad for the plating, so we must be cleaned the plating tanks in a fixed cycle. If the plating surface is too light, the dispersion ability is often not so good, and it’s easy to cause the surface to peel off, even caused broken when under high voltage.

Some operators did what they did according to the process requirements, but they did not catch the key point. The key point should be treated with hydrogen peroxide first, then heated(not heating the plating liquid first), and then added with any activated carbide. When there are many organic impurities, potassium permanganate is used for treatment. At this time should adjust the pH value of 3, and then heated to 60 ~ 80 °C, add the previously dissolved potassium permanganate, the amount of 0.3 ~ 1.59 / L or less, after stirring for more than 8h, filtered and adjusted The pH is in the normal range. If the plating liquid is red, we can use hydrogen peroxide to remove it.

In addition, the above method doesn’t work on the special organic contamination. Such as the organic impurities of animal glues, the dissolution of wax prototypes, and so on. The content of impurities is easy to cause the surface to peel off only with 0.01 ~ O.19 / L. But added tannin 0.03 to 0.059/L into the tank, the floc will appear within 10 minutes. After more than 8 hours of precipitation, it can be removed. It is best to add any activated carbide to completely remove the contamination of all organic impurities.