Electrolytic stripping solution composition of copper-plated hanger and stripping solution cyclic regeneration method

Abstract

The invention belongs to the technical field of plating layer deplating methods, and particularly relates to an electrolytic deplating solution composition of a copper plating hanger and a deplating solution cyclic regeneration method, the electrolytic deplating solution composition of the copper plating hanger comprises nitrate, a coordination agent, an accelerator, a solid corrosion inhibitor and an organic corrosion inhibitor, the solid corrosion inhibitor is a mixture of thiourea and hexamethylenetetramine, the weight ratio of thiourea to hexamethylenetetramine is 1: (0.2-4), the pH of the electrolytic stripping solution composition of the copper plating hanger is adjusted to 6.5-7.5 through the pH regulator, the electrolytic stripping solution composition can rapidly remove a copper plating layer, and after the stripping solution loses efficacy due to increase of the copper content, the copper plating layer can be rapidly removed. The precipitant is added to remove copper ions in the deplating solution, so that the deplating solution is regenerated, and the problem that the deplating solution is difficult to recover is effectively solved. According to the method for recycling the electrolytic stripping solution of the copper plating hanger, the problem that the stripping solution is difficult to treat and recycle after losing efficacy is solved.

Description

technical field [0001] The invention belongs to the technical field of plating deplating methods, and in particular relates to an electrolytic deplating solution composition for a copper plating rack and a method for recycling and regenerating the deplating solution. Background technique [0002] In the electroplating process, along with the electroplating (electroless plating) process, the hanger as the support of the plated part is also plated with various metal coatings. Because the hanger will be used repeatedly, it is necessary to completely remove the coating on the hanger before continuing to use it when plating a batch of plated parts and carrying out the electroplating of the next batch of plated parts. The rack generally adopts stainless steel base material, and the deplating process of the rack coating must meet the following requirements: first, the coating is removed quickly and completely, and second, the rack itself is not corroded. [0003] After the deplati...

AI Technical Summary

Problems solved by technology

At present, the main problems faced by the recovery of copper stripping solution are: high acidity, high content of copper and nickel ions, complex components, difficult to handle, and high recovery cost

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