Preparing technology of cyanide-free silver plating solution

A preparation process and a cyanide-free silver-plating technology are applied in the field of preparation of a cyanide-free silver-plating electroplating solution, which can solve the problems of difficult disposal of discharged waste water, low electroplating efficiency, environmental pollution, etc., and achieve good stability of the electroplating solution, The effect of good coating adhesion and bright coating adhesion

Inactive Publication Date: 2018-02-09
韩传怀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the electroplating solution commonly used in production is cyanide zinc plating solution. The plating layer of this electroplating solution has fine crystallization and strong activation ability, but it contains highly toxic cyanide, which will cause ecological and environmental pollution problems, and the discharged wastewater is not easy to treat. not very efficient

Method used

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Embodiment Construction

[0014] The present invention will be specifically introduced below in conjunction with specific embodiments.

[0015] A preparation process for cyanide-free silver-plating electroplating solution, is characterized in that, comprises the steps:

[0016] S1. Mix creatinine, potassium nitrate and pH regulator uniformly to obtain the first mixed solution;

[0017] S2. Slowly add silver nitrate to the first mixed solution, and stir until the solution is clear to obtain a second mixed solution;

[0018] S3. Adjust the temperature of the second mixed solution to 20-50° C., let stand for 2 hours, add piperidine, stir evenly, and let stand for use.

[0019] In order to better illustrate the present invention, the usage of the cyanide-free silver-plating electroplating solution produced by the preparation process of the present invention is described. The metal base is attached to the cathode which is a part of the circuit, the cathode and the attached base are immersed in the electro...

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Abstract

The invention discloses a preparing technology of a cyanide-free silver plating solution. The preparing technology includes the following steps that a complexing agent, a supporting electrolyte and apH regulator are mixed evenly, then a silver ion source material is slowly added, stirring is conducted until the solution is clarified, the solution temperature is regulated to be 20-50 DEG C, standing is conducted for 2 h, an electroplating additive is added, stirring is conducted evenly, and standing is conducted for stand-by. The cyanide-free silver plating solution produced by the preparing technology is very low in toxicity and good in stability of the plating solution, an electroplated part does not need pre-silver plating or silver immersing, and a plating layer is good in binding force and bright.

Description

technical field [0001] The invention belongs to the technical field of preparation of electroplating solution, and in particular relates to a preparation process of a cyanide-free silver plating electroplating solution. Background technique [0002] Electroplating solution refers to a liquid that can expand the cathodic current density range of the metal, improve the appearance of the coating, and increase the anti-oxidation stability of the solution. It usually includes main salts, conductive salts, positive active agents, buffers, and additives. At present, the electroplating solution commonly used in production is cyanide zinc plating solution. The plating layer of this electroplating solution has fine crystallization and strong activation ability, but it contains highly toxic cyanide, which will cause ecological and environmental pollution problems, and the discharged wastewater is not easy to treat. The efficiency is not very high. In view of this, it is necessary to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/46
CPCC25D3/46
Inventor 韩传怀
Owner 韩传怀
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