Method for sustainably complementing metallic cations in plating solution

Abstract

The invention discloses a method for sustainably complementing metallic cations in plating solution. In the process of plating, the plating solution in a plating device is delivered into a cation generator; the cation generator can generate coated metal cations during working; the plating solution containing the metal cations is delivered back to the plating device; and the steps are circulated so as to complement the metallic cations consumed in the plating solution of the plating device. The method can sustainably complement the metallic cations consumed in the plating solution, so as to avoid pouring the plating solution lacking the cations and preparing new plating solution again. By the method, the plating solution can be continuously used, the service life of the plating solution is prolonged, the plating solution does not be wasted so as to reduce production cost, and environmental pollution is reduced to achieve the aims of saving energy and reducing emission.

Description

technical field [0001] The invention relates to the electroplating industry, in particular to a method for continuously replenishing metal cations to an electroplating solution during electroplating. Background technique [0002] In the actual production process of electroplating, insoluble anodes are used a lot, which is also called inert anode system. In this electroplating process, since the electroplating metal ions in the electroplating solution will continue to decrease, it is necessary to add the prepared standard metal salt solution to supplement metal ions, such as in the process of nickel plating, it is necessary to continuously supplement nickel sulfate or other nickel salts to continue the electroplating, however, as the nickel ions in the supplemented nickel sulfate are consumed, the sulfate radical Ions or anions are retained, and then the charge in the plating solution will be unbalanced, so that the electroplating reaction cannot continue, so the plating solu...

AI Technical Summary

Problems solved by technology

[0002] In the actual production process of electroplating, insoluble anodes are used a lot, which is also called inert anode system. In this electroplating process, since the electroplating metal ions in the electroplating solution will continue to decrease, it is necessary to add the prepared standard metal salt solution to supplement metal ions, such as in the process of nickel plating, it is necessary to continuously supplement nickel sulfate or other nickel salts to continue the electroplating, however, as the nickel ions in the supplemented nickel sulfate are consumed, the sulfate radical Ions or anions are retained, and then the charge in the plating solution will be unbalanced, so that the electroplating reaction cannot continue, so the plating solution must be poured out regularly, and a new plating solution must be reconfigured. Not only is the operation troublesome, the plating solution is wasted, and The drained electroplating solution seriously pollutes the environment

In addition, during the electroplating process, as the metal cations are gradually reduced, they will become acidified at the same time, because the following reaction will occur at this time: 2H 2 O=O 2 +4H + +4e - or 4OH - =O 2 +2H 2 O+4e - (in alkaline plating solution), these two kinds of reactions all can cause the PH value of solution to drop, so must add the compound that adjusts solution PH value, both waste resources like this, also increase labor intensity, inconvenient operation, and add and adjust plating solution PH After the compound with high value is used, the pH value of the plating solution cannot be kept stable, which seriously affects the effect and efficiency of electroplating.

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