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Method for electroplating Cr-Ag alloy coating through dication ionic liquid

A technology of ionic liquid and double cation, which is applied in the field of Cr-Ag alloy plating with double cation ionic liquid, can solve problems such as large standard potential difference, difficulty in co-deposition, hydrogen embrittlement hazards, etc. The effect of improving binding force

Active Publication Date: 2018-12-18
蒙城繁枫真空科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional electroplating of Cr-Ag alloy layer needs to be carried out in a water-soluble electroplating solution containing cyanide. The standard potential difference between Ag and Cr in the solution in the aqueous solution is relatively large. The standard electrode potential of silver in aqueous solution at room temperature is 0.799V, and that of chromium The standard electrode potential in aqueous solution at room temperature is 1.33V, and it is difficult to achieve Ag-Cr co-deposition
And there will be serious hydrogen evolution phenomenon in the process, causing hydrogen embrittlement hazard

Method used

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  • Method for electroplating Cr-Ag alloy coating through dication ionic liquid

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Embodiment 1

[0047] The invention discloses a method for electroplating a Cr-Ag alloy coating with a double cation ionic liquid, comprising the following steps:

[0048] (1) Substrate pre-treatment; remove oil and rust, wash with water, and dry to obtain the substrate to be deposited;

[0049] (2) Preparation of imidazole-based cation ionic liquids: specifically include the following steps: (a) Synthesis of [BuMImCl]Cl: under nitrogen protection, methylimidazole and 1,4-dichlorobutane in a molar ratio of 1 : 2.1, was added in 100ml of toluene, stirred and refluxed for 6h at 90°C to obtain a pale yellow solid for subsequent use; (b) [BuMIm-TMG]Cl 2 Synthesis: under the protection of nitrogen, [MImBuCl]Cl and tetramethylguanidine were added into 50ml of acetonitrile according to the molar ratio of 1:1.1, and refluxed at 70°C for 15h to obtain the dicationic ionic liquid [BuMIm-TMG]Cl 2 ;

[0050] (3) The preparation of non-aqueous system electroplating solution electroplating solution: acc...

Embodiment 2

[0056] The invention discloses a method for electroplating a Cr-Ag alloy coating with a double cation ionic liquid, comprising the following steps:

[0057] (1) Substrate pre-treatment; remove oil and rust, wash with water, and dry to obtain the substrate to be deposited;

[0058] (2) Preparation of imidazole-based cation ionic liquids: specifically include the following steps: (a) Synthesis of [BuMImCl]Cl: under nitrogen protection, methylimidazole and 1,4-dichlorobutane in a molar ratio of 1 : 2.05, was added in 100ml toluene, stirred and refluxed for 12h at 80°C to obtain a light yellow solid for subsequent use; (b) [BuMIm-TMG]Cl 2 Synthesis: under the protection of nitrogen, [MImBuCl]Cl and tetramethylguanidine were added into 50ml acetonitrile according to the molar ratio of 1:1.05, and the reflux reaction was carried out at 60°C for 12h, and finally the dicationic ionic liquid [BuMIm-TMG]Cl was obtained. 2 ;

[0059] (3) The preparation of non-aqueous system electropla...

Embodiment 3

[0064] The invention discloses a method for electroplating a Cr-Ag alloy coating with a double cation ionic liquid, comprising the following steps:

[0065] (1) Substrate pre-treatment; remove oil and rust, wash with water, and dry to obtain the substrate to be deposited;

[0066] (2) Preparation of imidazole-based cation ionic liquids: specifically include the following steps: (a) Synthesis of [BuMImCl]Cl: under nitrogen protection, methylimidazole and 1,4-dichlorobutane in a molar ratio of 1 : 2, was added in 100ml toluene, stirred and refluxed for 9h at 100°C to obtain a pale yellow solid for subsequent use; (b) [BuMIm-TMG]Cl 2 Synthesis: Under the protection of nitrogen, [MImBuCl]Cl and tetramethylguanidine were added into 50ml of acetonitrile according to the molar ratio of 1:1, and the reflux reaction was carried out at 50°C for 18h, and finally the dicationic ionic liquid [BuMIm-TMG]Cl was obtained. 2 ;

[0067] (3) The preparation of non-aqueous system electroplating...

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Abstract

The invention discloses a method for electroplating a Cr-Ag alloy coating through dication ionic liquid. Taking a to-be-deposited substrate as the cathode and graphite as the anode, a plating part ofa Cr-Ag alloy is formed on the cathode through electroplating deposition in non-aqueous system electroplating liquid. The method is characterized in that the non-aqueous system electroplating liquid comprises the following components of an electrodeposition solvent, namely the imidazole-type dication ionic liquid; main salt, namely soluble trivalent chromium salt and soluble silver salt; an electroplating reducing agent, namely sodium dihydrogen phosphate; and a reaction solvent, namely acetone and dimethylhydantoin. The method for electroplating the Cr-Ag alloy coating through the dication ionic liquid has the characteristics of being environmentally friendly in process, good in coating compactness, large in bonding force, excellent in corrosion resistance and good in antibacterial effect.

Description

technical field [0001] The invention relates to the technical field of electroplating alloy coatings, in particular to a method for electroplating a Cr-Ag alloy coating with a double cation ionic liquid. Background technique [0002] In the era of scarcity of resources, metal corrosion caused huge losses to the social economy every year, and the economic losses caused by metal corrosion accounted for about 4% to 7% of the gross national product. Not only that, metal corrosion will also cause a lot of waste of metal materials and resources, so it is of great social significance to improve the development of corrosion-resistant materials. [0003] As a special functional coating, Cr-Ag has high wear resistance, corrosion resistance and antibacterial properties. It can be used in sanitary products, medical disinfection products and biopharmaceutical fields, etc., and has broad application prospects. [0004] The traditional electroplating of Cr-Ag alloy layer needs to be carri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/34
CPCC25D3/56C25D5/34
Inventor 赵铁军
Owner 蒙城繁枫真空科技有限公司
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