Method of preparing aluminum-titanium alloy plating through electrodeposition in organic solvent system at room temperature

Abstract

The invention provides a method of preparing an aluminum-titanium alloy plating through electrodeposition in an organic solvent system at the room temperature, and relates to a method of preparing analloy plating. The method comprises the following preparing processes that plating solution is prepared, specifically, anhydrous aluminum chloride and lithium aluminium tetrahydride are weighed, anhydrous titanium tetrachloride is slowly added into the anhydrous aluminum chloride and the lithium aluminium tetrahydride, and in the process, the using ratio of benzene to tetrahydrofuran is (4:1)-(4:3); a copper matrix is treated, specifically, a copper sheet is polished smoothly through 400, 800 and 1200 meshes of abrasive paper in sequence, and then oil removing is conducted; and constant-current electrodeposition is conducted, specifically, graphite serves as an anode, the copper sheet serves as a cathode, the current density is controlled to be 6-38 milliampere / square centimeter, electrodeposition is conducted, thus a pure aluminum-titanium alloy with the uniform particle size can be obtained, and the electrodeposition time is controlled to be 3-5 hours. The method adopts the graphiteas the anode, titanium ions with a certain concentration are obtained by adding the anhydrous titanium tetrachloride, the method is low in cost, the generated aluminum-titanium alloy is pure and uniform in particle size, and the titanium content is high.

Description

technical field [0001] The invention relates to a method for preparing an alloy coating, in particular to a method for preparing an aluminum-titanium alloy coating by electrodeposition in an organic solvent system at room temperature. Background technique [0002] Aluminum-titanium alloys have excellent properties such as excellent corrosion resistance, biocompatibility and high specific strength, so they are widely used in aerospace, automotive, medical and electronic products and other fields. The preparation methods of aluminum-titanium alloys mainly include direct fusion method, sintering method, reduction method and electrodeposition method. The direct fusion method consumes a lot of titanium and heat in the production process, increasing the production cost, and the prepared aluminum-titanium alloy is prone to grain segregation and oxidation, which is difficult to recover the raw material titanium, etc.; the sintering method requires equipment Higher production cost; ...

AI Technical Summary

Problems solved by technology

However, at room temperature, the standard electrode potential of aluminum and titanium is negative to the electrode potential of hydrogen, and the electrochemical deposition of aluminum-titanium alloy in aqueous solution will cause hydrogen evolution reaction, which will affect the quality of the coating.

Even if the reduction potential of titanium and aluminum is positively shifted by increasing the concentration of titanium ions and aluminum ions in the electrolyte, the hydrogen evolution reaction will still occur, so the electrochemical deposition of aluminum-titanium alloys can only be carried out in non-aqueous electrolyte systems

Images