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Cyanide-free high-speed silver plating electroplating solution

An electroplating solution and high-speed technology, which is applied in the field of electrochemical silver plating, can solve the problems of poor stability, high cost of plating solution, and low production efficiency, and achieve high corrosion resistance and wear resistance, low cost of plating solution, and high silver plating efficiency Effect

Inactive Publication Date: 2010-07-21
NINGBO SHUNJIA COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a simple and efficient cyanide-free high-speed silver-plating solution for solving the problems of poor stability of the above-mentioned prior art silver-plating solution, high cost of the solution, and low production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The silver plating solution is mainly composed of silver nitrate-sodium thiosulfate system and brightener sodium selenocyanide. The mass concentration of each component in the electroplating solution is:

[0020] Silver nitrate 60g / L, sodium thiosulfate 145g / L, sodium metabisulfite 60g / L, sodium sulfate 15g / L, boric acid 24g / L, sodium selenocyanide 2mg / L, and the balance is pure water.

Embodiment 2

[0022] The silver plating solution is mainly composed of silver nitrate-sodium thiosulfate system and brightener sodium selenocyanide. The mass concentration of each component in the electroplating solution is:

[0023] Silver nitrate 45g / L, sodium thiosulfate 105g / L, sodium metabisulfite 54g / L, sodium sulfate 15g / L, boric acid 18g / L, sodium selenocyanide 2mg / L, and the balance is pure water.

Embodiment 3

[0025] The silver plating solution is mainly composed of silver nitrate-sodium thiosulfate system and brightener sodium selenocyanide. The mass concentration of each component in the silver plating electroplating solution is: silver nitrate 50g / L, sodium thiosulfate 125g / L, sodium metabisulfite 57g / L, sodium sulfate 15g / L, boric acid 21g / L, sodium selenocyanide 2mg / L L, the balance is pure water.

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Abstract

The invention relates to the technical field of electrochemical silver plating, in particular to a cyanide-free high-speed silver plating electroplating solution, which solves the problem that the existing silver plating electroplating solution has high toxicity or low productivity and provides a cyanide-free high-speed silver plating electroplating solution. The electroplating solution comprises the following components in mass concentration: 40-60g / L of silver nitrate, 100-300g / L of sodium thiosulfate, 45-85g / L of sodium metabisulfite, 8-22g / L of sodium sulfate, 15-38g / L of boric acid and 0-2.5mg / L of brightener. The invention has low toxicity and high plating speed.

Description

technical field [0001] The invention relates to the technical field of electrochemical silver plating, and relates to a cyanide-free high-speed silver plating electroplating solution. Background technique [0002] The standard potential of silver is +0.799V. For common metal parts, the silver coating is a cathodic coating. Silver has a unique silver-white luster and is chemically stable to organic acids and alkalis. In the early days, it was mainly used for decorations and tableware. In recent years, it has been used more and more in aircraft and electronic products, especially for the fast-developing high-speed selective silver plating of lead brackets to meet the needs of decorative and functional silver plating. and other applications in many fields. [0003] So far, most of the domestic and foreign electroplating silver processes still adopt the cyanide silver plating process to electroplate the silver layer, mainly due to the good stability of the plating solution, go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/46
Inventor 李炳芳徐启泰
Owner NINGBO SHUNJIA COMM TECH CO LTD
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