Trivalent chromium electroplating liquid and preparation method thereof

A technology of electroplating solution and trivalent chromium, applied in the field of electroplating solution, can solve the problems of wear resistance, poor corrosion resistance, dull and rough coating, etc.

Inactive Publication Date: 2015-03-04
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 plating layer formed by this electroplating solution is dull, rough, wear-resistant and corrosion-resistant, and the stability of the electroplating solution is poor during storage and use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The formula of the electroplating solution is as follows: chromium chloride 50 / L, chromium sulfate 30 g / L, sodium chloride 50 g / L, boric acid 40 g / L, stabilizer 20 g / L, complexing agent 5 g / L, bright Agent 7g / L, add deionized water to 1000ml.

[0029] Weigh an appropriate amount of stabilizer and complexing agent according to the formula, add deionized water, and stir until dissolved; then weigh an appropriate amount of chromium chloride, chromium sulfate, and sodium chloride and add them to the above solution, and stir until dissolved at room temperature; Heat the above solution to 65°C with a water bath, stir until dissolved, then add an appropriate amount of bright additive, and adjust the pH value of the solution with boric acid.

Embodiment 2

[0031] The formula of the electroplating solution is as follows: chromium chloride 80g / L, chromium sulfate 60g / L, sodium chloride 75 g / L, boric acid 55g / L, stabilizer 45 g / L, complexing agent 12 g / L, brightener 20g / L, add deionized water to 1000ml.

[0032] Weigh an appropriate amount of stabilizer and complexing agent according to the formula, add deionized water, and stir until dissolved; then weigh an appropriate amount of chromium chloride, chromium sulfate, and sodium chloride and add them to the above solution, and stir until dissolved at room temperature; Heat the above solution to 65°C with a water bath, stir until dissolved, then add an appropriate amount of bright additive, and adjust the pH value of the solution with boric acid.

Embodiment 3

[0034] The formula of the electroplating solution is as follows: chromium chloride 115g / L, chromium sulfate 90g / L, sodium chloride 100 g / L, boric acid 60 g / L, stabilizer 70 g / L, complexing agent 18 g / L, bright Agent 33g / L, add deionized water to 1000ml.

[0035] Weigh an appropriate amount of stabilizer and complexing agent according to the formula, add deionized water, and stir until dissolved; then weigh an appropriate amount of chromium chloride, chromium sulfate, and sodium chloride and add them to the above solution, and stir until dissolved at room temperature; Heat the above solution to 65°C with a water bath, stir until dissolved, then add an appropriate amount of bright additive, and adjust the pH value of the solution with boric acid.

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PUM

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Abstract

The invention relates to trivalent chromium electroplating liquid and a preparation method thereof. The formula of the trivalent chromium electroplating liquid is as follows: 50-150g/L of chromium chloride, 30-120g/L of chromium sulfate, 50-120g/L of sodium chloride, 40-80g/L of boric acid, 20-90g/L of a stabilizer, 5-25g/L of a complexing agent, 7-45g/L of a brightener and the balance of deionized water with the total volume of various components being 1000ml. The preparation method comprises the steps of weighting appropriate amounts of the stabilizer and the complexing agent according to the formula, adding deionized water and stirring until the stabilizer and the complexing agent are dissolved; weighting appropriate amounts of chromium chloride, chromium sulfate and sodium chloride into the solution, stirring at room temperature until chromium chloride, chromium sulfate and sodium chloride are dissolved; heating the solution to 65 DEG C by virtue of a water-bath pot, adding an appropriate amount of the brightener additive and adjusting the pH value of the solution with boric acid to obtain the trivalent chromium electroplating liquid. The formed electroplated layer has the advantages of good abrasion resistance, corrosion resistance and high brightness and the electroplating liquid has good stability in the storage and application processes.

Description

technical field [0001] The invention relates to a trivalent chromium 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 coating....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/06
CPCC25D3/06C25D3/10
Inventor 禹胜林
Owner WUXI NUIST WEATHER SENSOR NETWORK TECH
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