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Trivalent chromium electroplate liquid capable of forming black clad layer

A technology of trivalent chromium and electroplating solution, which is applied in the field of trivalent chromium electroplating solution, which can solve the problems of poor adhesion, difficult maintenance and complex composition, and achieve the effect of good adhesion, easy maintenance and simple composition

Inactive Publication Date: 2011-02-09
GOOD CHEM SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing trivalent chromium electroplating solutions that form black coatings have complex components, difficult maintenance, poor adhesion, and often shallow black coatings, which cannot meet the needs of the industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The composition contained in the trivalent chromium electroplating solution that can form a black coating is as shown in table 1:

[0017] Table 1: Components of trivalent chromium electroplating solutions that can form black coatings

[0018] raw material

Embodiment 2

[0020] The composition contained in the trivalent chromium electroplating solution that can form black coating is as shown in table 2:

[0021] Table 2: Components of Trivalent Chromium Electroplating Baths That Can Form Black Plating

[0022] Substance name

[0023] Potassium formate

Embodiment 3

[0025] Form the contained composition of black coating electroplating solution as shown in table 3:

[0026] Table 3: Components of black coating electroplating solution

[0027] Substance name

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PUM

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Abstract

The invention discloses trivalent chromium electroplate liquid capable of forming a black clad layer. Each liter of the trivalent chromium electroplate liquid comprises the following raw materials: a cylinder opening agent, 20 to 150g of stabilizing agent, 10 to 20g of cobalt chloride or manganese chloride, 0.6 to 1.5g of ferric chloride, and 1 to 10g of wetting agent, wherein each liter of cylinder opening agent consists of 5 to 30g of blackening agent, 90 to 140g of chromic salt, 180 to 300g of L conducting salt, 25 to 90g of pH buffering agent. The trivalent chromium electroplate liquid capable of forming the black clad layer has simple components and is easy to maintain; and the formed black clad layer has deep black color and high adhesion.

Description

technical field [0001] The invention relates to a trivalent chromium electroplating solution capable of forming a black coating and an electroplating method using the electroplating solution. Background technique [0002] Hexavalent chromium is an ingestion poison / inhalation extremely poison, skin contact may cause sensitivity; it is more likely to cause hereditary gene defects, inhalation may cause cancer, and has persistent danger to the environment. Hexavalent chromium is gradually being abandoned as an electroplating solution. The toxicity of trivalent chromium is only 1% of hexavalent chromium, the sewage treatment is easy, and the adhesion of the coating formed by the trivalent chromium plating solution is very good, so the trivalent chromium electroplating process has been developed rapidly in recent years. The black chromium plating layer has particularly excellent physical and chemical properties. It not only has a magnificent and solemn decorative appearance, but a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/08
Inventor 李树泉谢金平谢绍俊范小玲
Owner GOOD CHEM SCI & TECH
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