Plate roller plating solution, method and production line for copper bottoming replacing nickel plating

Abstract

The invention discloses a plate roller plating solution, method and production line for copper bottoming replacing nickel plating. The plating solution is composed of the following components of 400-500 ml / L of a cyanide-free copper plating bath solution, 45-55 ml / L of a brightening agent, 30-50 ml / L of an addition agent, 10-15 ml / L of an acid-base regulator and the balance water, wherein the cyanide-free copper plating bath solution is one kind or a mixture of more kinds of copper sulfate, copper chloride and copper nitrate, the content of copper ions in the plating solution is 8-12 g / L, thebrightening agent is one kind or a mixture of more kinds of mercaptobenzimidazole, mercaptobenzothiazole and benzotriazole, the content of the brightening agent in the plating solution is 100-150 g / L,the addition agent is prepared from the raw materials of the following components of, by weight, 1000:0.7-1.5% of polyethylene glycol, 0.8-1.3% of bis-(sodium sulfopropyl)-disulfide and the balance pure water, the acid-base regulator is sulfuric acid and sodium hydroxide, and the addition amount of the sulfuric acid and the sodium hydroxide is determined by standard under which the PH value of the plating solution is maintained to be 9.5-10. According to the plate roller plating solution, method and production line for copper bottoming replacing nickel plating, a traditional nickel plating process is cancelled to be replaced by the copper bottoming process, so that the problem that the nickel-containing wastewater is difficult to treat is solved.

Description

technical field [0001] The invention relates to the technical field of plate roll electroplating, in particular to a method and equipment for removing nickel and changing bottom copper of plate rolls. Background technique [0002] Plate rolls are also called steel rolls, which are divided into hollow rolls and solid rolls, shafted rolls and non-spooled rolls. They are generally used for plate making. The surface of the drum is plated with copper, and the pattern is engraved by an intaglio electronic engraving machine, and then plated with a layer of chromium. After it is ready, it is delivered to the printing factory. It is often used for printing plastic packaging. The traditional plate-making copper plating process has long used nickel plating as the bottom layer of the steel body, and then copper plating to ensure good communication between the copper plating layer and the steel body. However, because the nickel-containing waste water produced by nickel plating is difficu...

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Problems solved by technology

[0002] Plate rolls are also called steel rolls, which are divided into hollow rolls and solid rolls, shafted rolls and non-spooled rolls. They are generally used for plate making. The surface of the drum is plated with copper, and the pattern is engraved by an intaglio electronic engraving machine, and then plated with a layer of chromium. After it is ready, it is delivered to the printing factory. It is often used for printing plastic packaging. The traditional plate-making copper plating process has long used nickel plating as the bottom layer of the steel body, and then copper plating to ensure good communication between the copper plating layer and the steel body. However, because the nickel-containing wastewater produced by nickel plating is difficult to treat and the discharge standard indicators required by the state continue to increase, how to replace the traditional nickel plating technology has become a technical problem that needs to be solved urgently

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