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Electrogalvanizing method based on choline chloride-xylitol deep eutectic solvent

A technology of deep eutectic solvent and choline chloride, which is applied in the field of electroplating and can solve problems such as combustion and explosion

Active Publication Date: 2016-01-20
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, ethylene glycol has a certain degree of toxicity, and there is a danger of burning and explosion when exposed to open flames, high heat or contact with oxidants.

Method used

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  • Electrogalvanizing method based on choline chloride-xylitol deep eutectic solvent
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  • Electrogalvanizing method based on choline chloride-xylitol deep eutectic solvent

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Experimental program
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Effect test

Embodiment 1

[0029] Firstly, 0.1 mol xylitol, 0.2 mol choline chloride, and 0.3 mol distilled water were respectively weighed and placed in a beaker. The beaker was sealed with plastic wrap, and then stirred at a constant temperature of 50° C. to obtain a transparent eutectic solvent. Then add 0.025 mol of zinc chloride and stir at 50°C to obtain a zinc-containing eutectic solvent;

[0030] The pure zinc plate is used as the anode and the low carbon steel is used as the cathode. It is immersed in a zinc-containing eutectic solvent heated to 50℃ in a water bath for 30 minutes of constant current electroplating. The direct distance between the cathode and the anode is 1cm, and the current density is 2.5mA / cm. 2 ;

[0031] After the electroplating is completed, the low carbon steel is taken out and washed twice with double distilled water, and finally dried in an oven at 60°C.

[0032] The conductivity of the eutectic solvent of choline chloride-xylitol-distilled water at room temperature and 50℃ is...

Embodiment 2

[0035] Firstly, 0.1 mol xylitol, 0.2 mol choline chloride, and 0.3 mol distilled water were respectively weighed and placed in a beaker. The beaker was sealed with plastic wrap, and then stirred at a constant temperature of 50° C. to obtain a transparent eutectic solvent. Then add 0.025 mol of zinc chloride and stir at 50°C to obtain a zinc-containing eutectic solvent;

[0036] Using pure zinc plate as anode and low carbon steel as cathode, immerse it in a zinc-containing eutectic solvent heated to 50℃ in a water bath for 15 minutes constant current electroplating. The direct distance between cathode and anode is 2cm, and the current density is 3mA / cm. 2 ;

[0037] After the electroplating is completed, the low carbon steel is taken out and washed twice with double distilled water, and finally dried in an oven at 60°C.

Embodiment 3

[0039] Firstly, 0.1 mol xylitol, 0.2 mol choline chloride, and 0.3 mol distilled water were respectively weighed and placed in a beaker. The beaker was sealed with plastic wrap, and then stirred at a constant temperature of 50° C. to obtain a transparent eutectic solvent. Then add 0.025 mol of zinc chloride and stir at 50°C to obtain a zinc-containing eutectic solvent;

[0040] The pure zinc plate is used as the anode and the low carbon steel is used as the cathode. The zinc-containing eutectic solvent heated to 60℃ in a water bath is used for 30 minutes constant current electroplating. The direct distance between the cathode and the anode is 1cm, and the current density is 5mA / cm. 2 ;

[0041] After the electroplating is completed, the low carbon steel is taken out and washed twice with double distilled water, and finally dried in an oven at 60°C.

[0042] The conductivity of the choline chloride-xylitol-distilled water eutectic solvent at 60℃ is 6.40ms·cm -1 .

[0043] The conductiv...

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Abstract

The invention discloses an electrogalvanizing method based on a choline chloride-xylitol deep eutectic solvent, belonging to the technical field of electroplating. According to the method, xylitol, choline chloride and distilled water are mixed at a constant temperature to obtain a transparent deep eutectic solvent; then zinc chloride is added into the deep eutectic solvent, and then the mixture is mixed at a constant temperature to obtain a zinciferous deep eutectic solvent which serves as electroplate liquid; a pure zinc plate serves as an anode; low-carbon steel serves as a cathode; and the anode and the cathode are dipped in the electroplate liquid for performing continuous current electroplating. The galvanization technology disclosed by the invention is safe and non-toxic, and is environment-friendly and economical; and the problem of environment pollution existing in borofluoride galvanization, halide galvanization and other processes is solved.

Description

Technical field [0001] The invention relates to a galvanizing method based on a choline chloride-xylitol eutectic solvent, and belongs to the technical field of electroplating. Background technique [0002] In the plating tank containing the zinc plating solution, the metal zinc ions in the zinc plating solution move to the cathode under the action of the potential difference to form a plating layer. Electro-galvanizing is widely used in protective coatings of steel materials, especially to prevent atmospheric corrosion. Traditional zinc plating methods include cyanide zinc plating and chloride zinc plating. Among them, cyanide zinc plating contains highly toxic cyanide, which causes serious pollution. The chloride zinc plating bath contains a large amount of potassium chloride, which causes serious corrosion to the equipment. Choline chloride and xylitol are used as eutectic solvents for zinc electroplating, which can reduce environmental pollution. The patent application nu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
Inventor 包全合刘立红敬和民尹孝辉
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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