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Method for producing zinc based on choline chloride-malonic acid low eutectic system

A technology of choline chloride and malonic acid, which is applied to the improvement of process efficiency, photography process, electrodes and other directions, can solve problems such as low viscosity of molten salt of zinc coating, and achieves simple and easy operation, fast electrodeposition rate, Simple effect of raw materials

Inactive Publication Date: 2018-10-12
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the viscosity of the molten salt in the preparation of zinc coatings by eutectic electrodeposition is low. By selecting a new ionic liquid, a new ionic liquid based on choline chloride-malonic acid eutectic Method for generating zinc in the system

Method used

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  • Method for producing zinc based on choline chloride-malonic acid low eutectic system
  • Method for producing zinc based on choline chloride-malonic acid low eutectic system
  • Method for producing zinc based on choline chloride-malonic acid low eutectic system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) The molar ratio of choline chloride, malonic acid and zinc oxide in the electrolyte is 4:4:1. Mix choline chloride, malonic acid and zinc oxide in a certain proportion and then heat to 90°C. Keep warm until stirring produces a clear viscous liquid. Then add 0.1mol / L ethylenediamine.

[0025] 2) Use the zinc sheet as a soluble anode, and the copper block as a cathode, put it into the above mixed liquid heated to 90°C for 60 minutes of double-anode constant current electrodeposition, where the distance between the anode and the cathode is 2cm, and the current density is 25mA / cm 2 .

[0026] 3) After electrodeposition, the sample was taken out and cleaned ultrasonically with absolute ethanol and deionized water, and finally blown with a hair dryer at low temperature.

[0027] The XRD figure of gained coating sees figure 2 , it can be found that the coating on the copper substrate is a zinc coating.

Embodiment 2

[0029] 1) The molar ratio of choline chloride, malonic acid and zinc oxide in the electrolyte is 4:4:1. Mix choline chloride, malonic acid and zinc oxide in a certain proportion and then heat to 90°C. Keep warm until stirring produces a clear viscous liquid. Then add 0.1mol / L ethylenediamine.

[0030] 2) Use the zinc sheet as a soluble anode, and the copper block as a cathode, and put it into the above mixed liquid heated to 90°C for 60 minutes of double-anode constant current electrodeposition, wherein the distance between the anode and the cathode is 2cm, and the current density is 20mA / cm 2 .

[0031] 3) After electrodeposition, the sample was taken out and cleaned ultrasonically with absolute ethanol and deionized water, and finally blown with a hair dryer at low temperature.

[0032] The EDS energy spectrum of gained coating sees figure 2 , it can be found that the coating on the copper substrate is a zinc coating.

Embodiment 3

[0034] 1) The molar ratio of choline chloride, malonic acid and zinc oxide in the electrolyte is 4:4:1. Mix choline chloride, malonic acid and zinc oxide in a certain proportion and then heat to 90°C. Keep warm until stirring produces a clear viscous liquid. Then add 0.1mol / L ethylenediamine.

[0035] 2) Use the zinc sheet as a soluble anode, and the copper block as a cathode, and put it into the above mixed liquid heated to 90°C for 60 minutes of double-anode constant current electrodeposition, where the distance between the anode and the cathode is 2cm, and the current density is 15mA / cm 2 .

[0036] 3) After electrodeposition, the sample was taken out and cleaned ultrasonically with absolute ethanol and deionized water, and finally blown with a hair dryer at low temperature.

[0037] The surface energy spectrum analysis figure of gained coating sees image 3 , it can be found that the coating on the copper substrate is closely combined with the substrate.

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Abstract

The invention relates to a method for producing zinc based on a choline chloride-malonic acid low eutectic system. The method is characterized in that a choline chloride-malonic acid-zinc oxide original electrolyte is prepared; little ethidene diamine is added to choline chloride-malonic acid-zinc oxide ion liquid based on the fixed dose concentration of substances; zinc plates in the ion liquid can be used as soluble anodes; red copper blocks can be used as cathodes; electrodes are soaked into the ion liquid and then are connected to a power supply through copper wires, high-current-density and constant-current electrolytic deposition is carried out under constant temperature; and after the electrolytic deposition, a sample is subjected ultrasonic washing and drying. According to the method, the raw materials are simple and are not preprocessed; few additives are added; the operation is simple, easy to carry out, green, environmentally friendly, safe and nontoxic; in addition, the used current density is high; the electrolytic deposition rate is high; and zinc can be rapidly generated on a copper substrate.

Description

technical field [0001] The invention relates to the field of electroplating technology, in particular to a method for generating zinc based on a choline chloride-malonic acid eutectic system. Background technique [0002] my country is the country with the largest zinc reserves. Since 1992, my country's zinc production has ranked first in the world. As a basic material in modern industrial society, zinc metal is widely used in various fields. Electrogalvanizing is widely used in the protective coating of iron and steel materials. Due to the low cost of zinc electrodeposition technology, it is suitable for wide promotion in large-scale industrial production. Especially against atmospheric corrosion. Traditional galvanizing methods include cyanide galvanizing and chloride galvanizing. Among them, cyanide galvanizing is seriously polluted because it contains highly toxic cyanide. Chloride galvanizing bath contains a large amount of potassium chloride, which seriously corrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/16C25C7/06C25C7/02
CPCC25C1/16C25C7/02C25C7/06Y02P10/20
Inventor 江凡刘菡露悦雨琨张磊李嘉欣石玮峰
Owner NANJING UNIV OF INFORMATION SCI & TECH
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