Solution and method for cyanide-free alkaline bright barrel copper plating

Abstract

The invention discloses a solution and a method for cyanide-free alkaline bright barrel copper plating. The solution comprises a No.1 BH-582 plating bath solution, 300 ml / L of a No.2 BH-582 plating bath solution, 10 ml / L of an additive and a pH value regulator, wherein the addition amount of the No.1 BH-582 plating bath solutions is calculated in such a manner that the content of copper ions in a final system is 5-7 g / L after the No.1 BH-582 plating bath solution and the No.2 BH-582 plating bath solution are matched, and the usage amount of the pH value regulators is based on the condition that the pH of the final system is kept between 9 and 11; the additive comprises a brightener, a bath change agent and a wetting agent in the volume ratio being 1:(1-3):1. The method for cyanide-free alkaline bright barrel copper plating adopts the solution for barrel copper plating and comprises steps as follows: pretreatment of an iron-based blank, activation, water washing and then cyanide-free alkaline bright barrel copper plating. On the basis that the binding force between plating and a matrix is guaranteed, the solution and the method can replace a cyanide system for pre-plating, and environment-friendly and clean production is realized.

Description

technical field [0001] The invention belongs to the field of electrochemical surface science and engineering, in particular to a solution and method for cyanide-free alkaline bright barrel copper plating. Background technique [0002] Cyanide copper plating has been used as a barrel copper plating process for a long time, but cyanide is highly toxic and poses a serious threat to operators and the environment, which makes cyanide barrel copper plating contrary to clean production. Therefore, cyanide-free barrel copper plating is the direction of future development . Cyanide-free alkaline barrel copper plating is the product of national clean production development requirements, which largely eliminates the hazards of cyanide copper plating to operators and the environment. A lot of hard work has been put in, and great progress has been made. [0003] At present, compared with cyanide barrel copper plating, traditional cyanide-free barrel copper plating still has the followi...

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Problems solved by technology

[0003] At present, compared with cyanide barrel copper plating, traditional cyanide-free barrel copper plating still has the following problems: (1) the brightness is worse than that of copper barrel plating with additive cyanide; (2) there is still a certain distance in the binding force, especially Thin parts are barrel-plated with copper and then nickel-plated, which is prone to poor bonding between the coating and the substrate such as peeling; (3) Some literature reports that it needs to be charged into the tank during electroplating, which brings inconvenience to the operation

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