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Method for preparing Al-Ti alloy or plated Al-Ti alloy by low-temperature electrolytic deposition of ionic liquid

An ionic liquid and electrodeposition technology, which is applied in electrolysis process, electrolysis components, photography technology, etc., can solve problems such as difficulty in titanium content, poor coating quality, and large corrosion

Inactive Publication Date: 2011-03-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of current molten salt electrodeposited Al-Ti alloys, such as difficult to control the titanium content, poor coating quality, and large corrosion, by providing a method for low-temperature electrodeposition of ionic liquids to prepare high-quality Al-Ti and its coating method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: In the ionic liquid formed by mixing aluminum trichloride and 1-butyl-3-methylimidazole chloride with a molar ratio of 2:1, add TiCl with a volume of 10% of the volume of the ionic liquid 4 , mix evenly, and then add choline chloride whose mass is 0.05% of the mass of the ionic liquid. After the substrate copper sheet is polished with sandpaper, it is placed in 40wt% sulfuric acid solution, 20wt% hydrochloric acid solution, water, acetone, ethanol to clean for 5 minutes, and it is used as the cathode after being fully dried. The aluminum sheet is used as the anode, and the cathode and the anode are separated by porous sand core glass with a pore size of 1-10 μm. The ionic liquid is added to the electrolytic cell, the protective gas is nitrogen, and the reaction temperature is kept at 20° C., and the flow rate of the ionic liquid electrolyte in the electrolytic cell is 20 mL / h. Control the cathode current density to i0A / m 2 Electrodeposition was taken out af...

Embodiment 2

[0028] Example 2: Aluminum trichloride with a molar ratio of 2:1 is mixed with 1-ethyl-3-methylimidazole chloride to form an ionic liquid, and a volume of TiCl with a volume of 2.5% of the volume of the ionic liquid is added 4 , mix evenly, and then add toluene whose mass is 5% of the mass of the ionic liquid. After polishing the base stainless steel sheet with sandpaper, put it in 30wt% sulfuric acid solution, 10wt% hydrochloric acid solution, water, acetone and ethanol to wash it for 10 minutes, and use it as the cathode after being fully dried. The aluminum sheet is used as the anode, and the cathode and the anode are separated by porous sand core glass with a pore size of 1-10 μm. Add the ionic liquid into the electrolytic cell, the protective gas is nitrogen, keep the reaction temperature at 80°C, the flow rate of the ionic liquid electrolyte in the electrolytic cell is 20mL / h, and the cathode current density is controlled at 20A / m 2 Electrodeposition was taken out after...

Embodiment 3

[0030] Example 3: Aluminum trichloride and 1-butylpyridine chloride are mixed to form an ionic liquid with a molar ratio of 3:1, and a volume of TiCl that is 20% of the volume of the ionic liquid is added 4 , mix evenly, and then add xylene whose mass is 2.5% of the mass of the ionic liquid. After polishing the base titanium sheet with sandpaper, place it in 40wt% sulfuric acid solution, 20wt% hydrochloric acid solution, water, acetone and ethanol to wash it for 5 minutes, and use it as the cathode after being fully dried. The titanium sheet is used as the anode, and the cathode and the anode are separated by porous sand core glass with a pore size of 1-10 μm. The ionic liquid is added to the electrolytic cell, the protective gas is nitrogen, the reaction temperature is kept at 100° C., and the flow rate of the ionic liquid electrolyte in the electrolytic cell is 200 mL / h. Control the cathode current density to 120A / m 2 Take out after 0.5 hours of electrodeposition.

[0031...

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Abstract

The invention relates to a method for preparing Al-Ti alloy or plated Al-Ti alloy by low-temperature electrolytic deposition of ionic liquid, which is characterized by synthesizing an ionic liquid from an organic material and anhydrous aluminium trichloride, adding a right amount of titanium salt to prepare an ionic liquid electrolyte, taking a substrate which is pre-treated as a deposition cathode and preparing Al-Ti alloy or plated Al-Ti alloy by direct current electrolytic deposition, wherein the titanium content within the alloy can be as high as 30%. The method provided by the invention has the advantages that the ionic liquid used therein has wide resource, low price and wide electrochemical window, the electrical conductivity is high, the ionic liquid is friendly to environment and the titanium salt can be effectively dissolved, the temperature of electrolytic deposition and cell voltage can be effectively reduced by using low-temperature electrolytic deposition process of ionic liquid to prepare Al-Ti alloy and the plating thereof, the energy consumption is reduced, the corrosion of the device is greatly reduced, the properties of the deposition layer which is obtained thereby are high and the thickness of the deposition layer and the titanium content of the alloy are easy to be controlled.

Description

technical field [0001] The invention particularly relates to a method for preparing Al-Ti alloy or electroplating Al-Ti alloy by adopting ionic liquid low-temperature electrodeposition technology. It belongs to the field of nonferrous metallurgy. Background technique [0002] Al-Ti alloys have excellent properties such as corrosion resistance, high temperature oxidation resistance, and high specific strength, and are increasingly widely used in aerospace, marine, petroleum, energy, chemical, and medical fields. The current industrial production method for producing Al-Ti alloy mainly adopts the fusion of pure metal aluminum and titanium. The production of Al-Ti alloys by this method not only consumes a large amount of electric energy at a relatively high temperature, but also uses expensive pure metal titanium, and the resulting products often have serious segregation, which limits the application of Al-Ti alloys. Researchers are trying to develop a new, low-cost and simpl...

Claims

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Application Information

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IPC IPC(8): C25C1/24C25C7/00C25D3/56C25D17/00
Inventor 徐存英华一新刘亚伟张笑盈李艳裴启飞
Owner KUNMING UNIV OF SCI & TECH
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