Method for electro-deposition of zinc in alkaline zincate solution

A technology of alkaline zincic acid and zincate, applied in the field of electrodeposition, can solve the problems of poor density of deposited zinc coating, easy passivation of coating, poor depth capability, etc., so as to increase the efficiency of zinc electrodeposition, facilitate industrialization, and reduce The effect of power consumption

Inactive Publication Date: 2017-09-22
云南创能斐源金属燃料电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deposited zinc coating has disadvantages such as poor density, easy passivation of the coating, low current efficiency, and poor depth capability.
[0003] Therefore, the method of alkaline environmental protection galvanizing at this stage still needs to be improved.

Method used

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  • Method for electro-deposition of zinc in alkaline zincate solution

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Comparison scheme
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Embodiment 1

[0051] In this embodiment, the method of electrodepositing zinc in an alkaline zincate solution is adopted, and a lead base layer is firstly applied on the surface of the nickel mesh, followed by zinc deposition. Specific steps are as follows:

[0052] (1) Nickel mesh is chemically removed from surface oil, and then the surface of nickel mesh is rinsed with water;

[0053] (2) carry out the electroplating process with the nickel net of pretreatment as negative electrode, wherein, be in the lead plating electrolyte that 110g / L hydrofluoric acid, 100g / L boric acid, 110g / L lead oxide and 0.2g / L gelatin form, And the pH of the electrolyte=1~2, at room temperature, at 40mA / cm 2 The current density, the anode is a pure lead sheet, the distance between the anode and the cathode is 5cm, and the electroplating time is 1h, that is, a layer of lead plating with better density is obtained on the surface of the nickel mesh.

[0054] (3) Dissolve 150g / L KOH and 50g / L LiOH in a certain vol...

Embodiment 2

[0058] In this embodiment, the method of electrodepositing zinc in an alkaline zincate solution is adopted, and a base layer of cadmium is firstly applied on the surface of the copper mesh, and then zinc is deposited. Specific steps are as follows:

[0059] (1) Remove surface oil stains from the copper mesh by chemical method, and then rinse the surface of the copper mesh with water;

[0060] (2) Carry out electroplating treatment with the pretreated copper net as cathode, wherein, be the cadmium plating of 60g / L cadmium sulfate, 120g / L ammonium chloride, 40g / L ethylenediaminetetraacetic acid and thiourea 1g / L composition In the electrolyte, and the pH of the electrolyte = 6, at room temperature, at 10mA / cm 2 The current density is high, the anode is a pure graphite sheet, the distance between the anode and the cathode is 5cm, and the electroplating time is 20min, that is, a layer of dense cadmium coating is obtained on the surface of the copper mesh.

[0061] (3) Dissolve 1...

Embodiment 3

[0065] In this embodiment, the method of electrodepositing zinc in an alkaline zincate solution is adopted, and an indium base layer is firstly applied on the surface of the nickel mesh, and then zinc is deposited. Specific steps are as follows:

[0066] (1) Nickel mesh is chemically removed from surface oil, and then the surface of nickel mesh is rinsed with water;

[0067] (2) The pretreated nickel mesh is used as the cathode for electroplating treatment, wherein, in the indium plating electrolyte composed of 40g / L indium sulfate and 15g / L sodium sulfate, at room temperature, at 10mA / cm 2 The current density is high, the anode is a pure graphite sheet, the distance between the anode and the cathode is 5cm, and the electroplating time is 1h, that is, a layer of indium coating with better density is obtained on the surface of the nickel mesh.

[0068] (3) Dissolve 200g / L KOH in a certain volume of distilled water, add 20g / L ZnO while hot, and add 20g / L K2CO3, 3g / L In3+ and 1g...

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Abstract

The invention puts forward a method for electro-deposition of zinc in an alkaline zincate solution and a product thereof. The method for electro-deposition of zinc in the alkaline zincate solution comprises the steps that (1) a substrate layer is formed on the surface of a matrix and composed of one of lead, cadmium and indium; (2) zinc deposition treatment is carried out in the alkaline zincate solution so that a zinc layer can be formed on the surface of the substrate layer. In a alkaline zincate electrolytic solution system, lead plating, cadmium plating or indium plating is adopted for the zinc deposition substrate layer, high hydrogen evolution electric potential and low cell voltage are achieved, and thus the hydrogen evolution phenomenon is effectively restrained, the electro-deposition efficiency of zinc is improved, and energy conservation and consumption reduction are realized.

Description

technical field [0001] The invention relates to the technical field of electrodeposition, in particular, the invention relates to a method for electrodepositing zinc in an alkaline zincate solution and a product thereof. More specifically, the present invention relates to a method for electrodepositing zinc in an alkaline zincate solution and a substrate for electrodepositing zinc on a surface. Background technique [0002] At present, electrodeposited zinc is also called galvanizing. There are mainly different electroplating methods of cyanide galvanizing, zincate galvanizing, potassium chloride galvanizing and sulfate galvanizing. Among them, zincate galvanizing has the advantages of simple electrolyte composition, fine crystallization, and easy electrolyte treatment, which is called alkaline environmental protection galvanizing. However, the deposited zinc coating has disadvantages such as poor density, easy passivation of the coating, low current efficiency, and poor de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/10C25D3/22C25D3/34C25D3/26C25D3/54
CPCC25D5/10C25D3/22C25D3/26C25D3/34C25D3/54
Inventor 汪云华崔涛施学金和晓才张战胜祁云一袁野杨孟昌周燕
Owner 云南创能斐源金属燃料电池有限公司
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