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Method for anodizing and coloring surface of fluorine-free and environment-friendly titanium alloy

Anodizing, titanium alloy technology, applied in surface reaction electrolytic coating, electrolytic coating, coating and other directions, to achieve the effect of good decorative effect, simple operation, good practical application prospect

Inactive Publication Date: 2010-06-02
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to provide a fluorine-free and environment-friendly titanium alloy surface anodic oxidation coloring method for the above-mentioned difficulties and problems existing in the existing titanium alloy anodic oxidation coloring process

Method used

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  • Method for anodizing and coloring surface of fluorine-free and environment-friendly titanium alloy
  • Method for anodizing and coloring surface of fluorine-free and environment-friendly titanium alloy
  • Method for anodizing and coloring surface of fluorine-free and environment-friendly titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Alkali washing and degreasing: at room temperature, add sodium carbonate (20g), sodium phosphate (20g), and sodium silicate (10g) to 1L of deionized aqueous solution in sequence, and heat to 70°C after the dissolution is complete. The 10mm×10mm×2mm TC4 titanium alloy workpiece was placed in the alkaline cleaning solution for continuous ultrasonic stirring, taken out after 15 minutes of treatment, washed with flowing deionized water for 2 minutes, and air-dried naturally. Optical microscope observed the surface metallographic structure such as figure 1 shown. It can be seen from the figure that the surface of the titanium alloy workpiece is rough, uneven, and has scratches.

[0036] 2) Electrolytic polishing: at room temperature, 110 mL of glacial acetic acid (99.5%, mass percent), 140 mL of perchloric acid (70-72%, mass percent) and 1.5 g of sodium perchlorate were added to a 250 mL beaker successively to prepare an electrolytic polishing solution. ; Put the titani...

Embodiment 2

[0049] 1) Alkali washing and degreasing: at room temperature, add sodium carbonate (20g), sodium phosphate (20g), and sodium silicate (15g) to 1L of deionized aqueous solution in turn, heat to 70°C after the dissolution is complete, and heat the TC4 titanium alloy The actual product was put into the alkaline washing solution with continuous ultrasonic agitation, taken out after 15 minutes of treatment, and washed with flowing deionized water for 2 minutes.

[0050] 2) Electrolytic polishing: at 25° C., put the titanium alloy workpiece after alkali washing and degreasing treatment into the electrolytic polishing solution of Example 1, take the workpiece as the anode and the lead plate as the cathode, and apply 75A dm -2 The electric current was energized for 6 minutes and taken out, and washed with deionized water for 2 minutes.

[0051] 3) Anodizing coloring: Add 55g of sodium phosphate, 30g of sodium silicate, 15g of tartaric acid, and 5g of glycerol in sequence in 800mL of d...

Embodiment 3

[0061] 1) Alkali washing and degreasing: the same as in Example 2.

[0062] 2) Electrolytic polishing: at 20°C, in a 250 mL beaker, add 110 mL of glacial acetic acid (content ≥ 99.5%), 140 mL of perchloric acid (70 to 72%) and 1 g of sodium perchlorate to prepare an electrolytic polishing solution; The titanium alloy workpiece after alkali cleaning and degreasing treatment is put into this polishing electrolyte, with the workpiece as the anode and the stainless steel plate as the cathode, applying 60A·dm -2 Electric current, energized for 5 minutes, taken out, and washed with deionized water for 2 minutes.

[0063] 3) Anodizing coloring: Add 50g of sodium phosphate, 40g of sodium silicate, 10g of tartaric acid, and 2g of glycerol in sequence in 800mL of deionized aqueous solution under stirring at 25°C, fully dissolve and then add deionized water to 1L It is formulated into anodized coloring solution. Put the titanium alloy workpiece after the above treatment into this solut...

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Abstract

The invention discloses a method for anodizing and coloring the surface of a fluorine-free and environment-friendly titanium alloy, relates to the anodizing and coloring for the surface of the titanium alloy, and provides a method for anodizing and coloring the surface of the fluorine-free and environment-friendly titanium alloy. The method comprises the steps of: washing a titanium alloy work piece with alkaline to remove oil, and carrying out electrolytic polishing; anodizing and coloring the titanium alloy work piece after electrolytic polishing to obtain an oxide film of the titanium alloy with different colors; closing the anodized and colored titanium alloy work piece; and drying the closed titanium alloy work piece to obtain the titanium alloy work piece with the anodized and colored surface. The invention has less technical steps, simple operation in each step and is easy to maintain. The oxide films of the titanium alloy with different colors are obtained through setting different voltage values; the oxide film is dazzlingly brilliant, has bright and uniform colors without allochromatic colors, strong smudge resistance, favorable decorative effect, higher surface hardness, favorable binding force and corrosion resistance and prevents fingerprints. The solution in each step is easy to maintain, and the invention can realize mass production and has favorable actual application prospect.

Description

technical field [0001] The invention relates to anodizing coloring on the surface of a titanium alloy, in particular to a process for anodizing coloring on the surface of a fluorine-free environment-friendly titanium alloy. Background technique [0002] In recent years, titanium alloys have attracted more and more attention due to their unique properties, so they are widely used in the field of national defense cutting-edge technology and civil industry. For example: in aerospace, titanium alloys are used in the production of a new generation of aircraft due to their small specific gravity, light weight and high specific strength; in medicine, titanium alloys have good biocompatibility and low repulsion to the human body, and are widely used in teeth In terms of implants and bone implants, as well as medical devices such as intravascular stents, it has become a compelling bio-metal material; in construction, due to the unique characteristics of titanium alloys, the amount of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 王周成刘忙仔彭淑合
Owner XIAMEN UNIV
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