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Electroplating liquid for plating surface of metal part in complex shape with zinc-nickel alloy

A technology of metal parts and zinc-nickel alloys, which is applied in the field of electroplating solutions for plating zinc-nickel alloys on the surface of complex-shaped metal parts, and can solve problems such as general plating ability of electroplated zinc-nickel alloy coatings, thick coating thickness, and affecting assembly and use effects , to achieve the effect of expanding the range of current density, improving dispersion ability and throwing ability

Active Publication Date: 2020-07-28
温州市展鑫新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the throwing ability of the electroplated zinc-nickel alloy coating obtained by the invention is average, and the deposition rate of the coating in the high current density area is obviously higher than that in the low current density area, resulting in the excessive thickness of the coating on the edge surface of the metal parts with complex shapes during the electroplating process. It will affect the effect of subsequent assembly, especially for the assembly of precision parts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An electroplating solution suitable for plating zinc-nickel alloys on the surface of metal parts with complex shapes is prepared from raw materials with the following mass concentrations:

[0036] Zinc oxide 12 g / L

[0037] Zinc chloride 5 g / L

[0038] Zinc sulfamate 2 g / L

[0039] Nickel sulfate 8 g / L

[0040] Nickel methanesulfonate 3 g / L

[0041] Sodium hydroxide 120 g / L

[0042] Complexing agent 40 g / L

[0043] Brightener 3 g / L

[0044] Adjuvant 8 g / L

[0045] The complexing agent is composed of 3-mercaptopropionic acid, triethylenetetramine and triethanolamine in a mass ratio of 5:2:1;

[0046] The brightener is composed of pyridinium propanesulfonate, diethoxylate and propynyl alcohol in a mass ratio of 1:2:4;

[0047] The auxiliary agent is composed of polyethyleneimine alkyl salt, 2-ethylhexyl sulfate sodium salt and sodium metavanadate in a mass ratio of 8:3:1.

[0048] The preparation method of the electroplating solution suitable for plating zinc-nic...

Embodiment 2

[0050] An electroplating solution suitable for plating zinc-nickel alloys on the surface of metal parts with complex shapes is prepared from raw materials with the following mass concentrations:

[0051] Zinc oxide 15 g / L

[0052] Zinc chloride 5 g / L

[0053] Zinc sulfamate 3 g / L

[0054] Nickel sulfate 10 g / L

[0055] Nickel methanesulfonate 3 g / L

[0056] Sodium hydroxide 110 g / L

[0057] Complexing agent 60 g / L

[0058] Brightener 2 g / L

[0059] Adjuvant 10 g / L

[0060] The complexing agent is composed of 3-mercaptopropionic acid, triethylenetetramine and triethanolamine in a mass ratio of 3:3:1;

[0061] The brightener is composed of pyridinium propanesulfonate, diethoxylate and propynyl alcohol in a mass ratio of 1:3:3;

[0062] The auxiliary agent is composed of polyethyleneimine alkyl salt, 2-ethylhexyl sulfate sodium salt and sodium metavanadate in a mass ratio of 10:2:1.

[0063] The preparation method of the electroplating solution suitable for plating zinc-...

Embodiment 3

[0065] An electroplating solution suitable for plating zinc-nickel alloys on the surface of metal parts with complex shapes is prepared from raw materials with the following mass concentrations:

[0066] Zinc oxide 8 g / L

[0067] Zinc chloride 10 g / L

[0068] Zinc sulfamate 1 g / L

[0069] Nickel sulfate 5 g / L

[0070] Nickel methanesulfonate 5 g / L

[0071] Sodium hydroxide 150 g / L

[0072]Complexing agent 60 g / L

[0073] Brightener 5 g / L

[0074] Adjuvant 3 g / L

[0075] The complexing agent is composed of 3-mercaptopropionic acid, triethylenetetramine and triethanolamine in a mass ratio of 5:1:1;

[0076] The brightener is composed of pyridinium propanesulfonate, diethoxylate and propynyl alcohol in a mass ratio of 1:1:5;

[0077] The auxiliary agent is composed of polyethyleneimine alkyl salt, 2-ethylhexyl sulfate sodium salt and sodium metavanadate in a mass ratio of 5:1:1.

[0078] The preparation method of the electroplating solution suitable for plating zinc-nick...

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PUM

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Abstract

The invention discloses electroplating liquid for plating the surface of a metal part in the complex shape with a zinc-nickel alloy. The electroplating liquid is prepared from, by mass, 8-15 g / L zincoxide, 5-10 g / L zinc chloride, 1-3 g / L zinc sulfamate, 5-10 g / L nickel sulfate, 3-5 g / L nickel methane sulfonate, 110-150 g / L sodium hydroxide, a 20-60 g / L complexing agent, 2-5 g / L a brightener and a3-10 g / L adjuvant. The electroplating liquid is wide in current density range, has excellent dispersing capacity and even plating capacity and is especially suitable for plating of the surface of themetal part in the complex shape.

Description

technical field [0001] The invention belongs to the field of electroplating, and in particular relates to an electroplating solution for plating zinc-nickel alloy on the surface of metal parts with complex shapes. Background technique [0002] Alkaline electroplating zinc-nickel alloy is developed on the basis of electroplating zinc, and has many excellent characteristics such as high corrosion resistance, good thermal stability, significantly improved hardness and wear resistance, and greatly reduced hydrogen embrittlement. When the nickel content is 10%-15%, its corrosion resistance is equivalent to that of cadmium coating, or even better than that of cadmium coating. Alkaline zinc-nickel alloy electroplating has been widely used to replace cadmium cyanide plating, and has achieved good environmental and social benefits. [0003] At present, the prior art has disclosed some technical solutions for electroplating zinc-nickel alloys. For example, the Chinese patent applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
CPCC25D3/565
Inventor 蒙春英
Owner 温州市展鑫新材料有限公司
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