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Trivalent chromium electroplating solution formula for automobile logo production and trivalent chromium electroplating process

An electroplating process and electroplating solution technology, which is applied in jewelry and other fields, can solve the problems of poor corrosion resistance of automobile logos and low coating hardness, and achieve the effects of color resistance to harsh weather, beautiful color, and rich sources of raw materials

Pending Publication Date: 2021-12-10
上原汽车铭牌(惠州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides the formulation of the trivalent chromium electroplating solution and the trivalent chromi

Method used

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  • Trivalent chromium electroplating solution formula for automobile logo production and trivalent chromium electroplating process
  • Trivalent chromium electroplating solution formula for automobile logo production and trivalent chromium electroplating process
  • Trivalent chromium electroplating solution formula for automobile logo production and trivalent chromium electroplating process

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Embodiment 1

[0031] The embodiment of the present invention provides the trivalent chromium electroplating solution formula for the production of automobile signs, also known as the trivalent chromium electroplating solution formula, including the raw materials of the following components: potassium chromium sulfate 8g / L, chromium sulfate 6g / L, basic chromium sulfate 2g / L, sodium sulfate 3g / L, aluminum sulfate 2g / L, acrylic acid-itaconic acid copolymer 1g / L, sodium fluoride 4g / L, sulfide 0.2g / L, sodium vinylsulfonate 0.5g / L, Polyethylene glycol 0.2g / L, the balance is water.

[0032] The molecular weight of acrylic acid-itaconic acid copolymer is 10000, and the molecular weight of polyethylene glycol is 400.

[0033] The pH value of the trivalent chromium plating solution is 1.8, adjusted with ammonia water or hydrochloric acid.

[0034] The electroplating process of the trivalent chromium electroplating solution for automobile logo production comprises the following steps:

[0035] A st...

Embodiment 2

[0045] The embodiment of the present invention provides the formula of trivalent chromium electroplating solution for automobile logo production, including the raw materials of the following components: potassium chromium sulfate 10g / L, chromium sulfate 7g / L, basic chromium sulfate 4g / L, sodium sulfate 4.5g / L , aluminum sulfate 3g / L, acrylic acid-itaconic acid copolymer 1.5g / L, sodium fluoride 6g / L, sulfide 1.1g / L, sodium vinyl sulfonate 1g / L, polyethylene glycol 0.4g / L , The balance is water.

[0046] The molecular weight of acrylic acid-itaconic acid copolymer is 25000, and the molecular weight of polyethylene glycol is 650.

[0047] The pH value of the trivalent chromium plating solution is 2, adjusted with ammonia water or hydrochloric acid.

[0048] The electroplating process of the trivalent chromium electroplating solution for automobile logo production comprises the following steps:

[0049] A standard iron sheet test product with a thickness of 0.1cm and a length an...

Embodiment 3

[0059] The embodiment of the present invention provides the formula of trivalent chromium electroplating solution for the production of automobile signs, comprising the raw materials of the following components: potassium chromium sulfate 12g / L, chromium sulfate 8g / L, basic chromium sulfate 6g / L, sodium sulfate 6g / L, Aluminum sulfate 4g / L, acrylic acid-itaconic acid copolymer 2g / L, sodium fluoride 8g / L, sulfide 2g / L, sodium vinyl sulfonate 1.5g / L, polyethylene glycol 0.6g / L, The amount is water.

[0060] The molecular weight of acrylic acid-itaconic acid copolymer is 40000, and the molecular weight of polyethylene glycol is 900.

[0061] The pH value of the trivalent chromium plating solution is 2.2, adjusted with ammonia water or hydrochloric acid.

[0062] The electroplating process of the trivalent chromium electroplating solution for automobile logo production comprises the following steps:

[0063] A standard iron sheet test product with a thickness of 0.1cm and a lengt...

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Abstract

The invention provides a trivalent chromium electroplating solution formula for automobile logo production and a trivalent chromium electroplating process, and relates to the field of electroplating. The trivalent chromium electroplating solution formula for automobile logo production comprises the following raw material components: 8-12 g/L of potassium chromium sulfate, 6-8 g/L of chromium sulfate, 2-6 g/L of basic chromium sulfate, 3-6 g/L of sodium sulfate, 2-4 g/L of aluminum sulfate, 1-2 g/L of an acrylic acid-itaconic acid copolymer, 4-8 g/L of sodium fluoride, 0.2-2 g/L of sulfide, 0.5-1.5 g/L of sodium vinylsulfonate, 0.2-0.6 g/L of polyethylene glycol and the balance of water. According to the formula, potassium chromium sulfate, chromium sulfate and basic chromium sulfate are used as chromium sources, the acrylic acid-itaconic acid copolymer is used as a complexing agent to improve the stability of the plating solution; polyethylene glycol is used as a wetting agent, and sodium sulfate and aluminum sulfate are added, so that the covering capacity of the plating solution can be remarkably improved, the corrosion resistance of a chromium layer can be remarkably improved, and the chromium layer is high in hardness and high in corrosion resistance; and therefore, the chromium layer of the automobile logo has the advantages of being high in adhesive force, attractive in color, resistant to atrocious weather and the like.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to the formulation of a trivalent chromium electroplating solution for the production of automobile signs and a trivalent chromium electroplating process. Background technique [0002] Electroplating requires a low-voltage high-current power supply to the electroplating tank and an electrolytic device composed of electroplating solution, parts to be plated (cathode) and anode. The composition of the electroplating solution varies depending on the plating layer, but they all contain the main salt that provides metal ions. A complexing agent capable of complexing metal ions in the main salt to form a complex, a buffer for stabilizing the pH of the solution, an anode activator and special additives, the electroplating process is that the metal ions in the plating solution undergo The electrode reaction is reduced to metal atoms and the metal is deposited on the cathode. Therefore, this is...

Claims

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Application Information

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IPC IPC(8): C25D3/06C25D3/10C25D7/00
CPCC25D3/06C25D3/10C25D7/00
Inventor 黄政华徐勇全海安杨顺利
Owner 上原汽车铭牌(惠州)有限公司
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