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Trivalent chromium plating solution, preparation method thereof and trivalent chromium plating method

A technology of trivalent chromium and chrome plating, applied in trivalent chromium plating solution and its preparation, in the field of trivalent chromium plating, which can solve problems such as whitening, reduction of chlorine gas precipitation, yellowing of trivalent chromium plating layer, etc., to reduce toxicity , Inhibition content, effect of process condition control

Inactive Publication Date: 2021-01-15
厦门市金宝源实业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the first purpose of the present application is to provide a trivalent chromium plating solution, and the trivalent chromium plating layer prepared by using the trivalent chromium plating solution solves the problem of common trivalent chromium plating layer. Yellowing and whitening problems, the use of this trivalent chromium plating solution can also reduce the precipitation of chlorine gas during electroplating

Method used

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  • Trivalent chromium plating solution, preparation method thereof and trivalent chromium plating method
  • Trivalent chromium plating solution, preparation method thereof and trivalent chromium plating method
  • Trivalent chromium plating solution, preparation method thereof and trivalent chromium plating method

Examples

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preparation example 1

[0052] A kind of trivalent chromium plating liquid of this preparation example is made up of the component of following weight: Chromium trichloride 90g, potassium chloride 200g, boric acid 6.0g, malic acid 40g, alkylsulfonate sodium 0.05g, iron powder 0.2g, 664g of deionized water.

[0053] The preparation method of a kind of trivalent chrome plating liquid of this preparation example comprises the steps:

[0054] Step 1: adding potassium chloride and boric acid in corresponding parts by weight into an electroplating tank filled with deionized water at 50°C, and stirring until completely dissolved;

[0055] Step 2: Add chromium trichloride of corresponding parts by weight into the electroplating tank and stir until completely dissolved;

[0056] Step 3: Electrolyze the electrolysis net for 5 hours, and the current is 15A during the electrolysis of the electrolysis net;

[0057] Step 4: Add malic acid and sodium alkylsulfonate in corresponding parts by weight to the electropla...

preparation example 2

[0060] A kind of trivalent chromium plating liquid of this preparation example is made up of the component of following weight: 100g of chromium trichloride, 225g of potassium chloride, 40g of boric acid, 50g of malic acid, 0.07g of sodium alkylsulfonate, 0.3g of iron powder, 685g of ionized water.

[0061] The preparation method of a kind of trivalent chrome plating liquid of this preparation example comprises the steps:

[0062] Step 1: Add potassium chloride and boric acid in corresponding parts by weight into an electroplating tank filled with deionized water at 55°C, and stir until completely dissolved;

[0063] Step 2: Add chromium trichloride of corresponding parts by weight into the electroplating tank and stir until completely dissolved;

[0064] Step 3: Electrolyze for 6 hours with an electrolysis net with a current of 20A;

[0065] Step 4: Add malic acid and sodium alkylsulfonate in corresponding parts by weight to the electroplating tank and stir to dissolve;

...

preparation example 3

[0068] A kind of trivalent chromium plating liquid of this preparation example is made up of the component of following weight: 120g of chromium trichloride, 250g of potassium chloride, 80g of boric acid, 60g of malic acid, 0.1g of sodium alkylsulfonate, 0.4g of iron powder, 490g of ionized water.

[0069] The preparation method of a kind of trivalent chrome plating liquid of this preparation example comprises the steps:

[0070] Step 1: Add potassium chloride and boric acid in corresponding parts by weight into an electroplating tank filled with deionized water at 60°C, and stir until completely dissolved;

[0071] Step 2: Add chromium trichloride of corresponding parts by weight into the electroplating tank and stir until completely dissolved;

[0072] Step 3: Electrolyze for 8 hours with an electrolysis net with a current of 30A;

[0073] Step 4: Add malic acid and sodium alkylsulfonate in corresponding parts by weight to the electroplating tank and stir to dissolve;

[...

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Abstract

The invention discloses a trivalent chromium plating solution, a preparation method thereof and a trivalent chromium plating method, and belongs to the technical field of electroplating technologies.The trivalent chromium plating solution is prepared from the components including, by weight, 90-120 parts of chromium trichloride, 200-250 parts of conductive salt, 6-80 parts of a buffer agent, 40-60 parts of a complexing agent, 0.05-0.1 part of a wetting agent, 0.2-0.4 part of iron powder and 450-650 parts of deionized water. With the adoption of a trivalent chromium plating layer prepared fromthe trivalent chromium plating solution, the problems of yellowing and whitening of common trivalent chromium plating layers are solved, and the trivalent chromium plating layer also has the effect of imitating the slight dark color of stainless steel.

Description

technical field [0001] The present application relates to the technical field of electroplating technology, in particular to a trivalent chromium plating solution, a preparation method thereof and a trivalent chromium plating method. Background technique [0002] At present, chrome plating has become one of the most widely used plating types in the electroplating industry. The chrome plating layer has the advantages of good hardness, wear resistance, corrosion resistance and decorative properties. It can be used not only as a decorative coating, but also as a functional coating. Chrome plating occupies an important position in the electroplating industry. For a long time, hexavalent chromium has been used in chromium plating, but hexavalent chromium is highly toxic and can cause cancer. With the increasing attention to environmental issues in various countries around the world, the traditional hexavalent chromium plating process has gradually been replaced and eliminated. Tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/06C25D3/10
CPCC25D3/06C25D3/10
Inventor 陈衍乾熊炜
Owner 厦门市金宝源实业有限公司
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