Method of electroplating zinc, nickel, molybdenum and their alloys by using ionic liquid

An ionic liquid and electro-galvanizing technology, which is applied in the fields of molybdenum and its alloys, ionic liquid system electro-galvanizing, and nickel, can solve the problems that the electroplating solution cannot be kept stable for a long time, and the ratio is complicated, achieving high market promotion value and simple process , The effect of excellent product quality

Active Publication Date: 2011-09-21
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, due to the complex ratio, the electroplating solution cannot be kept stable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] BmimCl-ZnCl 2 Galvanizing system: BmimCl and ZnCl 2 Prepare the electroplating solution with a certain molar ratio, in which ZnCl 2 The number of moles is not less than 1 / 2 of the number of moles of BmimCl, the zinc plate is used as a sacrificial anode, and the plated part is used as a cathode, at 1-30mA / cm 2 Electroplating at current density and temperature of 30-100°C. Typical electroplating conditions are: solution ratio ZnCl 2 : BmimCl=1:1, current density 8mA / cm 2 , the temperature is 80°C, and the plating time depends on the thickness of the required coating, usually less than 30 minutes.

Embodiment 2

[0016] Choline Chloride-Ethylene Glycol-ZnCl 2 System electroplating zinc: choline chloride, ethylene glycol and ZnCl 2 Prepare the electroplating solution in a certain molar ratio, wherein the molar ratio of choline chloride to ethylene glycol is 1:0.5~1, ZnCl 2 The number of moles is not less than 1 / 2 of the total number of moles of choline chloride and ethylene glycol. The zinc plate is used as a sacrificial anode, and the plated part is used as a cathode. At 1-30mA / cm 2 Electroplating at current density and temperature of 30-100°C. Typical electroplating conditions are: solution ratio choline chloride: ethylene glycol: ZnCl 2 =1:1:1, current density 6mA / cm 2 , The temperature is 70°C, and the plating time is determined according to the thickness of the required coating.

Embodiment 3

[0018] [BMPy] 2 SO 4 -BMPyTf 2 N-ZnSO 4 Electrogalvanizing system: [BMPy] 2 SO 4 , BMPyTf 2 N. ZnSO 4 Prepare the electroplating solution with a certain molar ratio, where [BMPy] 2 SO 4 with BMPyTf 2 The molar ratio of N is 1:0~2, ZnSO 4 The number of moles is not less than [BMPy] 2 SO 4 with BMPyTf 2 1 / 10 of the total moles of N, with the zinc plate as the sacrificial anode and the plated piece as the cathode, at 1-30mA / cm 2 Electroplating at current density and temperature of 30-100°C. Typical plating conditions are: solution ratio [BMPy] 2 SO 4 :BMPyTf 2 N: ZnSO 4 =1:1:0.2, current density 10mA / cm 2 , the temperature is 90°C, and the electroplating time is determined according to the thickness of the required coating.

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Abstract

The invention discloses a novel cleaning plating technology by using an ionic liquid which is a non-aqueous media as an electroplate liquid. Through using the technology, problems of bad environment and unstable qualities of electroplates existing in the condition of electroplating zinc, nickel, molybdenum and their alloys in an aqueous system can be solved. Qualities of coatings generated by using the technology are better than the qualities of coatings generated in the traditional system. The technology comprises the following steps: dissolving zinc salts, nickel salts and molybdate salt into the ionic liquid which is regarded as an electrolyte to prepare the electroplate liquid; electroplating at a current density of 1-30mA/cm2, wherein metallic zinc, nickel, molybdenum and their alloys are taken as soluble anode or graphite, complex carbon, glassy carbon, metal tungsten and titanium base plating platinum are taken as insoluble anode, and components which are needed to be electroplated are taken as cathode. Needed depth of coating can be obtained through controlling the current density and electroplating time.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a method for electroplating zinc, nickel, molybdenum and alloys thereof in an ionic liquid system Background technique [0002] Metal zinc, nickel, and molybdenum are important electroplating decoration and anti-corrosion materials, and are widely used in industrial and agricultural production and life. The traditional methods of electroplating zinc, nickel, and molybdenum alloys are all carried out in an aqueous solution system. During the electroplating process, the acidity or alkalinity range of the aqueous solution must be strictly controlled, and the phenomenon of "hydrogen evolution" must be kept on guard. The occurrence of hydrogen evolution in aqueous solution electroplating has a great impact on the compactness and brightness of the metal coating, and may lead to defective products in severe cases. In the electroplating of the aqueous solution system, buffers, brighteners...

Claims

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Application Information

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IPC IPC(8): C25D3/02C25D3/12C25D3/22C25D3/54C25D3/56
Inventor 张锁江左勇张建敏郑勇马梅彦
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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