A preparation method of a hot-dip aluminized grounding grid component

A grounding grid and hot-dip infiltration technology, which is applied in the hot-dip plating process, coating, metal material coating process, etc., can solve the problems of missed plating, aluminum liquid cannot be wetted, and the coating is uneven, so as to improve the wetting degree, improvement of production conditions, and simple operation

Active Publication Date: 2017-07-04
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the problem that the aluminum liquid cannot wet the surface of the component in the existing hot-dip aluminum plating process, resulting in missing plating and uneven coating, and to provide a method for preparing a hot-dip aluminum-infiltrated grounding grid component. Remove iron salt and other pollutants on the surface of iron and steel components by electrolysis before the helper treatment, so that the aluminum liquid can fully wet the surface of the component when the component is not covered with salt, and solve the problems of missing plating and uneven coating

Method used

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  • A preparation method of a hot-dip aluminized grounding grid component
  • A preparation method of a hot-dip aluminized grounding grid component
  • A preparation method of a hot-dip aluminized grounding grid component

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Dissolve Potassium Fluozirconate and Potassium Fluoride in appropriate amount of distilled water respectively and mix them together to form a solution, and make the concentration of each component in the solution: 15g / L Potassium Fluozirconate and 2g / L Potassium Fluoride to make a plating flux liquid. Then dissolve sodium hydroxide into tap water according to the addition amount of 70g / L, and the addition amount of OP emulsifier is 0.5g / L, and make ash removal solution.

[0035] The sample is Q235 steel. After removing surface rust stains with hydrochloric acid, wipe with acetone to remove oil.

[0036] The pretreated steel sample was clamped by a hanger and then immersed in the above-mentioned ash removal solution for treatment. The steel sample is used as the anode, the stainless steel electrolytic cell is used as the cathode, the temperature of the electrolyte is kept at 80°C during the ash removal process, and the DC current is 10A / dm 2 , processing time 5 minute...

Embodiment 2

[0041] Dissolve 100 grams of sodium fluozirconate and 12 grams of potassium fluoride in 500 milliliters of distilled water and mix them together to form a 1 liter solution to make a plating flux. Then dissolve sodium hydroxide into tap water according to the addition amount of 120g / L, and the addition amount of OP emulsifier is 5g / L to make ash removal solution.

[0042] The sample is also Q235 steel. Degrease with acetone and dissolve surface rust with hydrochloric acid.

[0043] The pretreated steel sample was clamped by a hanger and then immersed in the above-mentioned ash removal solution for treatment. The steel sample is used as the anode, the stainless steel electrolytic cell is used as the cathode, the temperature of the electrolyte is kept at 70°C during the ash removal process, and the DC current is 15A / dm 2, processing time 5 minutes.

[0044] After the dust removal, the samples were taken out and rinsed with tap water, kept in the flux for 5 minutes, and dried w...

Embodiment 3

[0049] Dissolve ammonium fluorozirconate and potassium fluoride in appropriate amount of distilled water and mix together to form a solution, and make the concentration of each component in the solution: 100g / L ammonium fluorozirconate and 5g / L potassium fluoride to make a plating flux liquid. Then dissolve sodium hydroxide into tap water according to the addition amount of 100g / L, and the addition amount of OP emulsifier is 3g / L, and make ash removal solution.

[0050] Take Q235 steel as a sample. Degrease with acetone and dissolve surface rust with hydrochloric acid.

[0051] The pretreated steel sample was clamped by a hanger and then immersed in the above-mentioned ash removal solution for treatment. The steel sample is used as the anode, the stainless steel electrolytic cell is used as the cathode, the temperature of the electrolyte is kept at 80°C during the ash removal process, and the DC current is 15A / dm 2 , processing time 10 minutes.

[0052] After the dust remo...

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Abstract

The invention discloses a preparation method of a hot-dip aluminized grounding net structural member. The problems of plating leakage phenomenon and plating layer non-uniformity caused by the condition that the surface of the structural member cannot be wetted by molten aluminum exist in the existing hot-dip aluminizing process. The preparation method comprises the steps of dissolving fluozirconate and potassium fluoride into distilled water to obtain a plating aiding solution; after carrying out acid pickling on a grounding net structural member to remove rust, introducing anode current to a sodium hydroxide solution to remove acid pickling residues and dust on the surface of the grounding net structural member; then, placing the grounding net structural member into the plating aiding solution, and aluminizing in molten aluminum after drying; and next, carrying out thermal treatment to obtain an intermetallic compound coating. By using the preparation method, pollutants on the surface of a steel piece can be thoroughly removed, the wetting degree of the molten aluminum on the surface of a workpiece can be greatly improved, the plating leakage phenomenon is eliminated, aluminizing without molten covering salt becomes true, and the problem of environment pollution caused by molten chloride and fluoride is thoroughly solved.

Description

technical field [0001] The invention relates to the surface treatment technology of metal materials, in particular to a preparation method of a hot-dip aluminized grounding grid component. Background technique [0002] The grounding grid plays the role of lightning protection, working grounding, current discharge and voltage equalization in the substation, and is one of the key facilities to ensure the safe operation of the substation. It has been buried in the soil environment with complex physical and chemical properties for a long time, and is affected by the leakage of induced current and fault current, causing serious corrosion. The corrosion of the grounding grid is the main factor leading to accidents in substations, which is directly related to the safe operation of the power grid. [0003] The corrosion of grounding grid materials is mainly soil corrosion, including electrochemical corrosion, chemical corrosion and microbial corrosion, among which electrochemical c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/02C23C2/34C23C2/12
CPCC23C2/02C23C2/12C23C2/34
Inventor 祝郦伟钱洲亥周海飞刘敏沈晓明
Owner STATE GRID CORP OF CHINA
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