There are many reasons why the nickel plating layer is easily burned, such as excessive current density, unreasonable anode arrangement, too low solution temperature, too low nickel ion concentration, and the like. The reason why the plating layer burns easily after large nickel plating solution treatment may be excessive consumption of nickel ions during large-scale treatment, mainly in the form of hydroxide precipitation during the process of raising the pH value to remove metal impurities, and some nickel ions also Together with precipitation, this is one of them; at the same time, the loss of the solution and the amount of waste deposited at the bottom of the tank are also not less than a few, and the combined losses of these areas may reach 10% of the total tank solution, That is equivalent to 30 ~ 40g/L, if the original nickel ion concentration in the solution has been in the lower limit of the scope of the formula, there may be the above-mentioned quality failure. According to this speculation,
The problem was solved at the time when a certain factory experienced the addition of 50g/L nickel sulfate after such failures.