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Anodic oxidation method of titanium and titanium alloy in graphene/graphene oxide electrolyte

An anodic oxidation and graphene technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve problems such as poor conductivity, environmental protection, and low efficiency, and achieve improved biocompatibility and enhanced corrosion resistance and the effect of abrasion resistance

Active Publication Date: 2019-01-11
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for anodic oxidation of titanium and titanium alloys in a graphene / graphene oxide electrolyte, which solves the problems of strong acid, strong corrosion and toxic electrolyte containing fluorine ions in the existing anodic oxidation method. Problems with poor conductivity and low efficiency

Method used

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  • Anodic oxidation method of titanium and titanium alloy in graphene/graphene oxide electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Step 1. Use a degreaser to clean the surface oil stains;

[0038] Step 2. Polish the metal titanium plate with 400#, 600#, 800#, 1200# water sandpaper in turn, and then polish it on the polishing cloth with silicon dioxide fine polishing liquid until there are no obvious scratches on the surface; Put in 3mol / L NaOH solution, alcohol, deionized water and ultrasonic cleaning at room temperature for 20min to remove the surface contamination layer, and finally dry it with a hair dryer for later use;

[0039] Step 3. In the 5mg / ml graphene oxide aqueous solution, add the reducing agent citric acid to make the concentration of citric acid reach 10mg / mL, heat the reduction reaction in an oil bath at 80°C for 8h, and obtain the graphene / graphene oxide electrolyte ;

[0040] Step 4. Wrap the copper wire on the titanium alloy as the anode and immerse it in the electrolyte. The distance between it and the stainless steel cathode is 5cm. The DC power supply is oxidized at room tem...

Embodiment 2

[0042] Step 1. Use a degreaser to clean the surface oil stains;

[0043] Step 2. Polish the metal titanium plate with 400#, 600#, 800#, 1200# water sandpaper in turn, and then polish it on the polishing cloth with silicon dioxide fine polishing liquid until there are no obvious scratches on the surface; Put in 5mol / L NaOH solution, alcohol, deionized water and ultrasonic cleaning at room temperature for 20 minutes to remove the surface contamination layer, and finally dry it with a hair dryer for later use;

[0044] Step 3. In the 8mg / mL graphene oxide aqueous solution, add the reducing agent citric acid to make the citric acid concentration reach 10mg / mL, heat the reduction reaction in an oil bath at 95°C for 10h, and obtain the graphene / graphene oxide electrolyte ;

[0045] Step 4. Wrap the copper wire on the titanium alloy as the anode and immerse it in the electrolyte, with a distance of 8cm from the stainless steel cathode, and oxidize it with DC power at room temperatur...

Embodiment 3

[0047] Step 1. Use a degreaser to clean the surface oil stains;

[0048] Step 2. Polish the metal titanium plate with 400#, 600#, 800#, 1200# water sandpaper in turn, and then polish it on the polishing cloth with silicon dioxide fine polishing liquid until there are no obvious scratches on the surface; Put in 6mol / L NaOH solution, alcohol, deionized water and ultrasonic cleaning at room temperature for 20min to remove the surface contamination layer, and finally dry it with a hair dryer for later use;

[0049]Step 3. In the 10mg / mL graphene oxide aqueous solution, add the reducing agent citric acid to make the citric acid concentration reach 10mg / mL, heat the reduction reaction in an oil bath at 100°C for 12h, and obtain the graphene / graphene oxide electrolyte ;

[0050] Step 4. Wrap the copper wire on the titanium alloy as the anode and immerse it in the electrolyte, keep a distance of 10cm from the stainless steel cathode, and oxidize it with a DC power supply at room temp...

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Abstract

The invention discloses an anodic oxidation method of titanium and titanium alloy in graphene / graphene oxide electrolyte. The anodic oxidation method comprises the following steps of: firstly cleaningoil stain on the surfaces of the titanium and the titanium alloy by using a degreaser; and secondly, carrying out surface pretreatment, then adding a reducing agent citric acid to a graphene oxide aqueous solution of certain concentration, causing the concentration of the citric acid to reach 10mg / mL, reducing graphene oxide for a period of time under the condition of heating to obtain the graphene / graphene oxide electrolyte, and finally carrying out anodic oxidation treatment. The anodic oxidation method of the titanium and the titanium alloy in the graphene / graphene oxide electrolyte causesthe anodic oxidation process to be relatively efficient and environmentally friendly by using the graphene / graphene oxide electrolyte instead of a strong acid or toxic electrolyte containing fluorideions. A generated oxidation film not only improves the biocompatibility of ttitanium and titanium alloy implant materials, but also can effectively enhance the corrosion resistance and wear resistance of metal surfaces.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of titanium and titanium alloys, and relates to a method for anodic oxidation of titanium and titanium alloys in a graphene / graphene oxide electrolyte. Background technique [0002] Titanium and titanium alloys are considered to be the most ideal implantable biomedical materials due to their excellent mechanical properties and good biocompatibility. Titanium is light in weight, and its elastic modulus is close to that of human bone, which can effectively solve the problems of bone resorption and osteonecrosis caused by stress. Titanium and titanium alloys also have the advantages of good corrosion resistance and biocompatibility, so they are more suitable as hard tissue repair materials. At present, titanium and titanium alloys are widely used in medical fields such as artificial bones, artificial joints, dental implants, vascular stents, and cardiac pacemakers. However, the elastic mo...

Claims

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Application Information

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IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 单迪赵梦园邵晖方长青苗行
Owner XIAN UNIV OF TECH
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