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Method for co-depositing al-zn alloy coating in ionic liquid system

An ionic liquid and alloy plating technology, applied in the direction of cells, electrolysis process, electrolysis components, etc., can solve the problems of poor plating thickness and composition uniformity, serious equipment corrosion, high energy consumption, etc. The effect of small environmental pollution

Active Publication Date: 2017-08-29
怀宁县成科新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two methods have certain defects in the process: the composite electroplating process adopts high-temperature molten salt technology, the thickness of the formed coating and the uniformity of the composition are poor, and the equipment is severely corroded and consumes a lot of energy; Excessive energy consumption for heating results in high costs

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  • Method for co-depositing al-zn alloy coating in ionic liquid system
  • Method for co-depositing al-zn alloy coating in ionic liquid system
  • Method for co-depositing al-zn alloy coating in ionic liquid system

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Embodiment 1

[0031] The method for co-depositing an Al-Zn alloy coating in an ionic liquid system of the present invention comprises the following steps:

[0032] (1) Preparation of disubstituted imidazolium chloride-aluminum chloride type ionic liquid

[0033] A small amount of anhydrous aluminum chloride is added to the disubstituted imidazole chloride several times to form a disubstituted imidazole chloride-aluminum chloride ionic liquid at room temperature; the disubstituted imidazole chloride and AlCl 3The molar ratio is 1:2; the disubstituted imidazole chloride is 1-methyl-3 ethyl imidazole chloride.

[0034] (2) Preparation of disubstituted imidazolium chloride-zinc chloride type ionic liquid

[0035] Anhydrous zinc chloride is added to disubstituted imidazole chloride and heated to 80°C to form a disubstituted imidazole chloride-zinc chloride ionic liquid; the disubstituted imidazole chloride and ZnCl 2 The molar ratio is 1:2; the disubstituted imidazole chloride is 1-methyl-3 et...

Embodiment 2

[0049] The method for co-depositing an Al-Zn alloy coating in an ionic liquid system of the present invention comprises the following steps:

[0050] (1) Preparation of disubstituted imidazolium chloride-aluminum chloride type ionic liquid

[0051] A small amount of anhydrous aluminum chloride is added to the disubstituted imidazole chloride several times to form a disubstituted imidazole chloride-aluminum chloride ionic liquid at room temperature; the disubstituted imidazole chloride and AlCl 3 The molar ratio is 1:4; the disubstituted imidazole chloride is 1-ethyl-3 methyl imidazole chloride.

[0052] (2) Preparation of disubstituted imidazolium chloride-zinc chloride type ionic liquid

[0053] Anhydrous zinc chloride is added to disubstituted imidazole chloride and heated to 60°C to form a disubstituted imidazole chloride-zinc chloride ionic liquid; the disubstituted imidazole chloride and ZnCl 2 The molar ratio is 1:4; the disubstituted imidazole chloride is 1-ethyl-3 me...

Embodiment 3

[0067] The method for co-depositing an Al-Zn alloy coating in an ionic liquid system of the present invention comprises the following steps:

[0068] (1) Preparation of disubstituted imidazolium chloride-aluminum chloride type ionic liquid

[0069] A small amount of anhydrous aluminum chloride is added to the disubstituted imidazole chloride several times to form a disubstituted imidazole chloride-aluminum chloride ionic liquid at room temperature; the disubstituted imidazole chloride and AlCl 3 The molar ratio is 1:1; the disubstituted imidazole chloride is 1-ethyl-3 methyl imidazole chloride.

[0070] (2) Preparation of disubstituted imidazolium chloride-zinc chloride type ionic liquid

[0071] Anhydrous zinc chloride is added to disubstituted imidazole chloride and heated to 80°C to form a disubstituted imidazole chloride-zinc chloride ionic liquid; the disubstituted imidazole chloride and ZnCl 2 The molar ratio is 1:1; the disubstituted imidazole chloride is 1-ethyl-3 me...

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Abstract

The invention discloses a method for co-deposition of an Al-Zn alloy coating in an ionic liquid system. The method comprises steps as follows: a Cu sheet is soaked in a plating liquid for constant-potential electro-deposition treatment; the plating liquid consists of a disubstituted imidazole chloride-aluminium chloride type ionic liquid and a disubstituted imidazole chloride-zinc chloride type ionic liquid; the disubstituted imidazole chloride-aluminium chloride type ionic liquid consists of disubstituted imidazole chloride and AlCl3 in the mole ratio of 1:(1-4), and the disubstituted imidazole chloride-zinc chloride type ionic liquid consists of disubstituted imidazole chloride and ZnCl2 in the mole ratio of 1:(1-4); the mass percent of Zn in the plating liquid is in a range of 1-5%; a three-electrode system is adopted, the Cu sheet is used as a working electrode, a Zn sheet or an Al sheet is used as a counter electrode, and a Pt wire is used as a reference electrode; the voltage applied to the working electrode is in a range of minus 1.0-minus 1.4 V. With the adoption of the method, the Al-Zn alloy coating with components accurately controllable can be prepared and is compact, flat and even in surface, and the method is low in energy consumption and environment-friendly.

Description

technical field [0001] The invention relates to an electroplating method, in particular to a method for co-depositing an Al-Zn alloy coating in an ionic liquid system. Background technique [0002] Aluminum-zinc alloy coating has excellent corrosion resistance, and because of the large reserves of zinc and aluminum in my country, aluminum-zinc alloy coating has attracted increasing attention and has been widely used in industry. The traditional process is to use composite electroplating method or hot-dip plating method to obtain aluminum-zinc alloy coating. However, these two methods have certain defects in the process: the composite electroplating process adopts high-temperature molten salt technology, the thickness of the formed coating and the uniformity of the composition are poor, and the equipment is severely corroded and consumes a lot of energy; The heating energy consumption is too large and the cost is high. How to obtain high-quality aluminum-zinc alloy coatings...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25D21/10
CPCC25D3/56C25D21/10
Inventor 廖成丁晶晶江奕东梅军刘焕明
Owner 怀宁县成科新材料研究院有限公司
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