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Non-cyanide zinc-deposited solution and non-cyanide plating method of aluminum wheel boss using non-cyanide zinc-deposited solution

A technology of precipitating zinc and solution, which is applied in the fields of cyanide-free electroplating and cyanide-free zinc-precipitating solution for aluminum wheels, and achieves the effects of good binding force, stronger binding force and simple wastewater treatment

Active Publication Date: 2009-11-18
GUANGZHOU SANFU NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the existing aluminum wheel hub electroplating process, the primary purpose of the present invention is to provide a cyanide-free zinc precipitation solution for quaternary alloys that is comparable in effect to the existing cyanide zinc precipitation solution

Method used

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  • Non-cyanide zinc-deposited solution and non-cyanide plating method of aluminum wheel boss using non-cyanide zinc-deposited solution
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  • Non-cyanide zinc-deposited solution and non-cyanide plating method of aluminum wheel boss using non-cyanide zinc-deposited solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Cyanide-free zinc precipitation solution is composed of the following components, the rest is water:

[0028] Composition of cyanide-free zinc precipitation solution

Proportion

Crater

350mL / L

supplements

120mL / L

Regulator

8mL / L

[0029] Among them, the composition of the cylinder opener is sodium hydroxide (the content of hydroxide ion is 140g / L), copper sulfate (the content of copper ion is 2g / L), nickel chloride (the content of nickel ion is 3g / L), trichloride Iron oxide (0.8g / L iron ion content) and zinc oxide (16g / L zinc ion content); the ingredients of the supplement are sodium hydroxide and sodium gluconate at concentrations of 500g / L and 50g / L, respectively; The components of the regulator are sodium nitrate and benzotriazole, the concentrations of which are 200g / L and 20g / L respectively.

[0030] 2. The aluminum alloy wheel hub electroplating process using cyanide-free high-density copper plating solution,...

Embodiment 2

[0052] 1. Cyanide-free zinc precipitation solution is composed of the following components, the rest is water:

[0053] Composition of cyanide-free zinc precipitation solution

Proportion

Crater

350mL / L

supplements

130mL / L

Regulator

10mL / L

[0054] Among them, the composition of the cylinder opener is sodium hydroxide (the content of hydroxide ion is 140g / L), copper chloride (the content of copper ion is 1.8g / L), nickel sulfate (the content of nickel ion is 3g / L), sulfuric acid Iron (0.7g / L iron ion content) and zinc oxide (16g / L zinc ion content); the ingredients of the supplement are potassium hydroxide and potassium sodium tartrate at concentrations of 520g / L and 30g / L, respectively; The ingredients of the agent are sodium nitrite and 1,3-diethylthiourea, the concentrations are 180g / L and 30g / L respectively.

[0055] 2. The aluminum alloy wheel hub electroplating process using cyanide-free high-density copper plating solu...

Embodiment 3

[0077] 1. Cyanide-free zinc precipitation solution is composed of the following components, the rest is water:

[0078] Composition of cyanide-free zinc precipitation solution

Proportion

Crater

400mL / L

supplements

120mL / L

Regulator

10mL / L

[0079] Among them, the composition of the cylinder opener is potassium hydroxide (the content of hydroxide ion is 130g / L), copper chloride and copper nitrate (the content of copper ion is 1.6g / L), nickel sulfate and nickel ammonium sulfate (the content of nickel ion is 1.6g / L). 3g / L), iron sulfate and iron nitrate (0.7g / L iron ion content) and zinc oxide and zinc chloride (14g / L zinc ion content); the ingredients of the supplement are sodium hydroxide and potassium sodium tartrate , whose concentrations are 500g / L and 40g / L respectively; the components of the regulator are sodium nitrite and 2-mercaptobenzimidazole, whose concentrations are 180g / L and 30g / L respectively.

[0080] 2. The ...

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Abstract

The invention relates to electroplating of aluminum wheel boss, in particular to non-cyanide zinc-deposited solution and a non-cyanide plating method of the aluminum wheel boss using the non-cyanide zinc-deposited solution. The non-cyanide zinc-deposited solution is mainly prepared from the following components: 350 to 450 mL / L cylinder opening agent, 8 to 12 mL / L regulator, 120 to 130 mL / L extender, and the balance of water. The cylinder opening agent contains quaternionic metallic ions of copper, iron, nickel and zinc. The non-cyanide plating method comprises the steps of preplating treatment, zinc deposition for two times, nickel preplating / high-density non-cyanide copper preplating, acid bright copper plating, polishing, pretreatment and multilayer nickel chromium plating; and the non-cyanide zinc-deposited solution is used in the twice zinc deposition. The electroplating technology adopts the process of substituting cyanide with a multielement composition additive, does not contain the cyanide and a strong complexing agent, is non-toxic and harmless, is simple in wastewater disposal and belongs to the process of cleaner production.

Description

technical field [0001] The invention relates to the electroplating of aluminum wheel hubs, in particular to a cyanide-free zinc precipitation solution and a cyanide-free electroplating method for aluminum wheel hubs using the solution. Background technique [0002] In the aluminum wheel hub electroplating, due to the existence of the natural oxide film on the surface of the aluminum wheel hub substrate, the bonding strength between the substrate and its surface coating is very poor. In order to solve this problem, zinc-immersion treatment is usually used. Zinc-immersion is the most convenient and economical method among various pre-plating methods for aluminum parts, and it is also the most widely used process in industry. The zinc layer is a good overcoating layer for electroplating and chemical plating. The Bondel method makes the zinc precipitation solution multi-alloyed, which changes the bonding force of the coating. At the same time, the zinc precipitation solution co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22C25D5/12C25D5/30
Inventor 田志斌包志华赵会然
Owner GUANGZHOU SANFU NEW MATERIALS TECH
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