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Environment-friendly trivalent chromium electroplating solution and environment-friendly trivalent chromium electroplating method thereof

A technology of trivalent chromium and electroplating solution, which is applied in the field of electroplating technology, can solve the problems of poor corrosion resistance of the coating, low coverage of the plating solution, and inability to meet the needs of industrial production, and achieve the effect of improving corrosion resistance and coverage

Active Publication Date: 2012-03-21
湖南领湃达志科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deposited coating has poor corrosion resistance and low coverage of the plating solution, which cannot meet the needs of actual industrial production.

Method used

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  • Environment-friendly trivalent chromium electroplating solution and environment-friendly trivalent chromium electroplating method thereof
  • Environment-friendly trivalent chromium electroplating solution and environment-friendly trivalent chromium electroplating method thereof
  • Environment-friendly trivalent chromium electroplating solution and environment-friendly trivalent chromium electroplating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Plating solution composition:

[0028]

[0029] Electroplating method: take a nickel-plated sheet (standard brass sheet 100*70 mm with a nickel layer thickness of 8 microns), and conduct an electroplating test in a 267ml Hou's bath. The conditions are: temperature 35 ° C, DC current 8 amps, electroplating 2 Minutes, high-purity graphite (purity 99.99%) was used as the anode to obtain test piece A1.

[0030] Evaluation of electroplating effect: Observe the bright area on the test piece with a range of 5×9.4 cm, and the current density range of the plating solution can be obtained, and then the covering ability of the plating solution can be evaluated. Seal the parts not coated with chromium layer with varnish, and do neutral salt spray test for 36 hours, no chromium layer corrosion is found.

Embodiment 2

[0032] Plating solution composition:

[0033]

[0034]

[0035] Electroplating method: take a nickel-plated sheet (standard brass sheet 100*70 mm with a nickel layer thickness of 8 microns), and conduct an electroplating test in a 267ml Hou's bath. The conditions are: temperature 35 ° C, DC current 8 amps, electroplating 2 Minutes, high-purity graphite (purity 99.99%) was used as the anode to obtain test piece A2.

[0036] Evaluation of electroplating effect: Observe the bright area on the test piece with a range of 5×9.5 cm, and the current density range of the plating solution can be obtained, and then the covering ability of the plating solution can be evaluated. Seal the parts not coated with chromium layer with varnish, and do neutral salt spray test for 32 hours, no chromium layer corrosion is found.

Embodiment 3

[0038] Plating solution composition:

[0039]

[0040] Electroplating method: take a nickel-plated sheet (standard brass sheet 100*70 mm with a nickel layer thickness of 8 microns), and conduct an electroplating test in a 267ml Hou's bath. The conditions are: temperature 35 ° C, DC current 8 amps, electroplating 2 Minutes, high-purity graphite (purity 99.99%) was used as the anode to obtain test piece A3.

[0041] Evaluation of electroplating effect: Observe the bright area on the test piece with a range of 5×9.1 cm, and the current density range of the plating solution can be obtained, and then the covering ability of the plating solution can be evaluated. Seal the parts not coated with chromium layer with varnish, and do neutral salt spray test for 32 hours, no chromium layer corrosion is found.

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PUM

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Abstract

The invention provides an environment-friendly trivalent chromium electroplating solution and an environment-friendly trivalent chromium electroplating method, and belongs to the technical field of electroplating. The invention provides an environment-friendly trivalent chromium electroplating solution by adding ferric sulfate and cobaltous sulfate in the electroplating solution in order to solve the problems of poor corrosion resistance of the deposit plating layer and low covering capacity of the plating solution in the conventional trivalent chromium electroplating process. The electroplating solution has the advantages of strong corrosion resistance and good covering capacity, etc. The electroplating solution can be widely used in the electroplating field.

Description

technical field [0001] The present invention relates to an electroplating technology, more specifically, relates to a trivalent chromium electroplating technology. technical background [0002] Chromium has excellent decorative and functional properties. The most common industrial process currently used is hexavalent chromium plating, but hexavalent chromium is extremely harmful. The World Health Organization, Europe and the United States are paying more and more attention to the hazards of hexavalent chromium, and continue to reduce the discharge standards of hexavalent chromium wastewater. Trivalent chromium electroplating, as the most important, direct and effective alternative to hexavalent chromium electroplating, has incomparable advantages over hexavalent chromium electroplating in terms of process performance and environmental protection. For example, the pollution of trivalent chromium plating solution is relatively small, its toxicity is only 1% of hexavalent chr...

Claims

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Application Information

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IPC IPC(8): C25D3/06C25D5/00
Inventor 陈蔡喜蔡志华牛艳丽
Owner 湖南领湃达志科技股份有限公司
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