Blackening solution and cyanide-free zinc-plating cadmium-free electroplating blackening technology

A blackening liquid and blackening technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of environmental pollution chromium, complex blackening process of rolled copper foil, etc., and achieve good performance and blackness The effect of uniform and simplified blackening process

Inactive Publication Date: 2021-04-06
中铜华中铜业有限公司
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Problems solved by technology

[0005] The embodiment of the present invention provides a blackening solution and cyanide-free zinc-plating and cadmium-free electroplating blackening process, which are used to solve the problem that the existing rolling copper foil blackening process is too complicated, and the blackening solution contains serious pollution to the environment. chrome problem

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  • Blackening solution and cyanide-free zinc-plating cadmium-free electroplating blackening technology
  • Blackening solution and cyanide-free zinc-plating cadmium-free electroplating blackening technology

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[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] In the description of the embodiments of the present invention, it should be noted that unless otherwise specified and limited, the terms "first", "second" and "third" are for the purpose of clearly explaining the numbering of product parts and do not represent any substantive gender distinction. The directions of "up", "down", "left"...

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Abstract

The invention relates to the technical field of rolled copper foil processing technologies, and discloses a blackening solution and a cyanide-free zinc-plating cadmium-free electroplating blackening technology. According to the blackening solution, water is adopted as a solvent, and the blackening solution comprises the following components including, by mass concentration, 20 g/L-30 g/L of zinc sulfate, 20 g/L-30 g/L of of zinc chloride, 10 g/L-30 g/L of potassium pyrophosphate, 5 g/L-20 g/L of sodium ethylene diamine tetracetate, 30 g/L-40 g/L of boric acid, 5 g/L-15 g/L of didodecyl dimethyl ammonium chloride, 10 g/L-20 g/L of didodecyl dimethyl ammonium bromide and a surface active additive. The cyanide-free zinc-plating cadmium-free electroplating blackening technology is provided and is used for solving the problems that an existing rolled copper foil blackening technology flow is too complex, and a blackening solution of the existing rolled copper foil blackening technology flow contains chromium which seriously pollutes the environment.

Description

technical field [0001] The invention relates to the technical field of rolling copper foil processing technology, in particular to a blackening solution and a blackening process of cyanide-free zinc-plating and cadmium-free electroplating. Background technique [0002] In recent years, calendered copper foil products have become the most basic material for flexible printed circuit boards due to their good physical properties such as good ductility and high folding resistance, and are mainly used in flexible circuit boards and high-frequency circuit boards. . In order to meet the heat resistance, corrosion resistance and solderability requirements of the copper foil of the circuit board, the surface of the rolled copper foil needs to be treated, that is, blackening treatment and reddening treatment. The reddish-treated rolled copper foil basically copies the surface treatment method of electrolytic copper foil, but the peeling resistance and etching properties of the reddish...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/00
CPCC25D11/00
Inventor 李楚方刘新宽刘平王佳兴高克乔亚峰张宇智董振兴潘菲
Owner 中铜华中铜业有限公司
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