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Ionic liquid electrolyte for magnesium alloy surface treatment and method for electroplating aluminum on surface of magnesium alloy

An ionic liquid and surface treatment technology, which is applied in the field of ionic liquid electrolyte for magnesium alloy surface treatment and electroplating aluminum on the surface of magnesium alloy, can solve the problems of poor bonding force, affecting the quality of coating, high surface chemical activity, etc., and achieve good corrosion resistance Effect

Inactive Publication Date: 2018-09-11
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as electroless plating and electroplating technology is concerned, coatings with uniform thickness can be prepared on the surface of parts of various shapes, which is suitable for large-scale and large-scale production. However, due to the high chemical activity of the surface of magnesium alloys, the traditional electrolyte mainly uses water as Solvent, the metal cations in the plating solution are easy to replace with magnesium, forming a loose metal coating with relatively poor bonding force; at the same time, almost all acidic plating solutions will cause rapid corrosion and dissolution of magnesium, and a large amount of hydrogen gas released during dissolution will affect Coating quality

Method used

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  • Ionic liquid electrolyte for magnesium alloy surface treatment and method for electroplating aluminum on surface of magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The composition of the electrolyte and the steps of the electroplating aluminum method are as follows:

[0038] (1) Electrolyte configuration:

[0039] Configure AlCl with a molar ratio of 2:1 3 : EMIC (aluminum chloride-1-ethyl-3-methylimidazole chloride) room temperature ionic liquid is the electrolyte, and its preparation process is as follows:

[0040] ① Weighing. Weigh 200gEMIC, 365gAlCl respectively 3 .

[0041] ② preparation. AlCl 3 Add the powder to the EMIC powder in portions with constant stirring until all is dissolved.

[0042] ③ refined. Wash the high-purity aluminum wire with acid and alkali, then wash it with alcohol, dry it, put it in the prepared ionic liquid, and let it stand at room temperature for a week. The ionic liquid becomes clear and transparent, and you can try plating.

[0043] All processes were carried out in a glove box under an argon atmosphere.

[0044] AlCl 3 : The following reaction occurs when EMIC ionic liquid is configured...

Embodiment 2

[0057] Prepare aluminum coating on the surface of AM60 magnesium alloy, the composition of electrolyte and the step of electroplating aluminum method are as follows:

[0058] (1) Electrolyte configuration:

[0059] Configure AlCl with a molar ratio of 1.5:1 3 : EMIC (aluminum chloride-1-ethyl-3-methylimidazole chloride) room temperature ionic liquid is the electrolyte, and its preparation process is as follows:

[0060] ① Weighing. Weigh 250gEMIC, 342gAlCl respectively 3 .

[0061] ② preparation. AlCl 3 Add the powder to the EMIC powder in portions with constant stirring until all is dissolved.

[0062] ③ refined. Wash the high-purity aluminum wire with acid and alkali, then wash it with alcohol, dry it, put it in the prepared ionic liquid, and let it stand at room temperature for a week. The ionic liquid becomes clear and transparent, and you can try plating.

[0063] All processes were carried out in a glove box under an argon atmosphere.

[0064] AlCl 3 : The reac...

Embodiment 3

[0070] Prepare aluminum coating on the surface of AM60 magnesium alloy, the composition of electrolyte and the step of electroplating aluminum method are as follows:

[0071] (1) Electrolyte configuration:

[0072] Configure AlCl with a molar ratio of 1.2:1 3 : EMIC (aluminum chloride-1-ethyl-3-methylimidazole chloride) room temperature ionic liquid is the electrolyte, and its preparation process is as follows:

[0073] ① Weighing. Weigh 300gEMIC, 328gAlCl respectively 3 .

[0074] ② preparation. AlCl 3 Add the powder to the EMIC powder in portions with constant stirring until all is dissolved.

[0075] ③ refined. Wash the high-purity aluminum wire with acid and alkali, then wash it with alcohol, dry it, put it in the prepared ionic liquid, and let it stand at room temperature for a week. The ionic liquid becomes clear and transparent, and you can try plating.

[0076] All processes were carried out in a glove box under an argon atmosphere.

[0077] AlCl 3 : The reac...

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Abstract

The invention provides ionic liquid electrolyte for magnesium alloy surface treatment and a method for electroplating aluminum on the surface of magnesium alloy and relates to the technical field of protection of magnesium alloy surfaces. The ionic liquid electrolyte for magnesium alloy surface treatment comprises ionic liquid mixed liquid of aluminum chloride and organic salt, wherein the organicsalt is one of halogenated alkyl pyridine, halogenated alkyl imidazole or chlorinated aryl ammonium salt. The method for electroplating aluminum on the surface of the magnesium alloy comprises the following steps: magnesium alloy pre-treatment: mechanically grinding the magnesium alloy, alkali washing to remove oil liquor, dipping the magnesium alloy with galvanizing zinc and drying the magnesiumalloy successively for later use; electrolyte preparation: electroplating aluminum to the surface of the magnesium alloy, putting an anode material which is made from a high purity aluminum plate anda cathode material which is the pre-treated magnesium alloy in the electrolyte, and carrying out pulse electroplating mode or a direct current electroplating mode; and cleaning: flushing the electroplated magnesium alloy to obtain the aluminized magnesium alloy. According to the technical scheme, the ionic liquid electrolyte is novel and environment-friendly, a tight and uniform aluminized layeris obtained on the surface of the magnesium alloy, and the corrosion resistance of the magnesium alloy is improved.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy surface protection, in particular to an ionic liquid electrolyte for magnesium alloy surface treatment and a method for electroplating aluminum on the magnesium alloy surface. Background technique [0002] Magnesium alloy has attracted extensive attention because of its rich resources, high specific strength, damping and shock absorption, easy machining and dimensional stability, but its poor corrosion resistance largely limits its wider application. [0003] Surface treatment is an effective means to improve the corrosion resistance of magnesium alloy surface. At present, the main surface treatment processes include micro-arc oxidation, anodic oxidation, chemical oxidation, electroplating and electroless plating. As far as electroless plating and electroplating technology is concerned, coatings with uniform thickness can be prepared on the surface of parts of various shapes, which is suit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/66C25D5/42
CPCC25D3/66C25D5/42
Inventor 张敏吴护林李忠盛何庆兵丛大龙宋凯强赵子鹏张隆平李立
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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