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A cyanide-free silvering electroplating solution and a preparing method thereof

A cyanide-free silver plating and electroplating solution technology, applied in the field of electroplating solution, can solve the problems of wear resistance, poor corrosion resistance, rough coating, poor conductivity, etc.

Inactive Publication Date: 2015-04-22
WUXI NUIST WEATHER SENSOR NETWORK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating formed by this electroplating solution is rough, has poor wear resistance, poor corrosion resistance, and poor electrical conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The formula of this electroplating solution is as follows: silver nitrate 50g / L, potassium sulfate 40g / L, sodium sulfate 60g / L, buffering agent 30 g / L, wetting agent 5 g / L, brightener 5g / L, add deionized water to 1000ml.

[0029] Weigh an appropriate amount of wetting agent according to the formula, add deionized water, and stir until dissolved; then weigh an appropriate amount of silver nitrate, potassium sulfate, and sodium sulfate and add them to the above solution, and stir until dissolved at room temperature; then put the above solution in a water bath Heat to 65°C, add a proper amount of brightening additives, adjust the pH value of the solution with a buffer, and stir evenly.

Embodiment 2

[0031] The formula of this electroplating solution is as follows: silver nitrate 60g / L, potassium sulfate 47g / L, sodium sulfate 80g / L, buffering agent 35 g / L, wetting agent 10 g / L, brightener 12g / L, add deionized water to 1000ml.

[0032] Weigh an appropriate amount of wetting agent according to the formula, add deionized water, and stir until dissolved; then weigh an appropriate amount of silver nitrate, potassium sulfate, and sodium sulfate and add them to the above solution, and stir until dissolved at room temperature; then put the above solution in a water bath Heat to 65°C, add a proper amount of brightening additives, adjust the pH value of the solution with a buffer, and stir evenly.

Embodiment 3

[0034] The formula of the electroplating solution is as follows: silver nitrate 70g / L, potassium sulfate 54g / L, sodium sulfate 100g / L, buffer 40 g / L, wetting agent 15 g / L, brightener 20 g / L, add deionized water to 1000ml.

[0035] Weigh an appropriate amount of wetting agent according to the formula, add deionized water, and stir until dissolved; then weigh an appropriate amount of silver nitrate, potassium sulfate, and sodium sulfate and add them to the above solution, and stir until dissolved at room temperature; then put the above solution in a water bath Heat to 65°C, add a proper amount of brightening additives, adjust the pH value of the solution with a buffer, and stir evenly.

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PUM

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Abstract

The invention relates to a cyanide-free silvering electroplating solution and a preparing method thereof. The electroplating solution comprises 50-90 g / L of silver nitrate, 40-70 g / L of potassium sulfate, 60-140 g / L of sodium sulfate, 30-50 g / L of a buffering agent, 5-25 g / L of a wetting agent and 5-35 g / L of a brightener, with the balance being deionized water and the total volume being 1000 mL. The electroplating solution is prepared by weighing a proper amount of the wetting agent according to the formula, adding the deionized water, stirring until the wetting agent is dissolved, weighing proper amounts of the silver nitrate, the potassium sulfate and the sodium sulfate, adding the weighed silver nitrate, the weighed potassium sulfate and the weighed sodium sulfate into the above-mentioned solution, stirring at room temperature until the silver nitrate, the potassium sulfate and the sodium sulfate are dissolved, heating the solution to 65 DEG C by using a water bath, adding a proper amount of the brightener, adjusting the pH value of the solution by using the buffering agent, and stirring uniformly. A plating formed by the electroplating solution is wear-resistant, good in corrosion resistance, high in brightness, good in conductivity and good in stability.

Description

technical field [0001] The invention relates to a cyanide-free silver-plating electroplating solution and a preparation method, belonging to the technical field of electroplating solutions. Background technique [0002] Electroplating is the process of plating a thin layer of other metals or alloys on the surface of certain metals using the principle of electrolysis. It is a process of using electrolysis to attach a layer of metal film to the surface of metal or other material parts to prevent metal oxidation ( Such as rust), improve wear resistance, electrical conductivity, reflective properties, corrosion resistance (copper sulfate, etc.) and enhance the appearance. The outer layer of many coins is also electroplated. [0003] During electroplating, the plated metal or other insoluble materials are used as the anode, and the workpiece to be plated is used as the cathode, and the cations of the plated metal are reduced on the surface of the workpiece to be plated to form a...

Claims

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Application Information

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IPC IPC(8): C25D3/46
CPCC25D3/46
Inventor 禹胜林
Owner WUXI NUIST WEATHER SENSOR NETWORK TECH
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