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

Anodizing, titanium alloy technology, applied in surface reaction electrolytic coatings, electrolytic coatings, coatings, etc., to achieve the effects of easy maintenance, good adhesion and corrosion resistance, and good practical application prospects

Inactive Publication Date: 2012-03-14
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) Alkaline washing and degreasing: at room temperature, add sodium carbonate (20g), sodium phosphate (20g) and sodium silicate (10g) in sequence to 1L deionized aqueous solution, and heat to 70°C after the dissolution is complete. The TC4 titanium alloy workpiece of 10mm×10mm×2mm was placed in the alkaline cleaning solution and continued to be stirred ultrasonically. After being treated for 15 minutes, it was taken out, washed with flowing deionized water for 2 minutes, and dried naturally. Optical microscope observation of its surface metallographic structure as figure 1 shown. It can be seen from the figure that the surface of the titanium alloy workpiece is rough, uneven, and there are scratches.

[0036] 2) Electropolishing: At room temperature, add 110mL glacial acetic acid (99.5%, mass percent), 140mL perchloric acid (70-72%, mass percent) and 1.5g sodium perchlorate to prepare an electrolytic polishing solution in a 250mL beaker. ; Put the titanium alloy workp...

Embodiment 2

[0049] 1) Alkaline washing and degreasing: at room temperature, add sodium carbonate (20g), sodium phosphate (20g), sodium silicate (15g) in sequence to 1L deionized aqueous solution, heat to 70°C after the dissolution is complete, and TC4 titanium alloy The actual product is put into the alkaline cleaning solution and continuously stirred by ultrasonic wave, after being treated for 15 minutes, it is taken out, 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, with the workpiece as the anode and the lead plate as the cathode, apply 75A·dm -2 Take it out after energizing for 6 minutes, and wash it with flowing deionized water for 2 minutes.

[0051] 3) Anodic oxidation coloring: at 25°C, add 55g of sodium phosphate, 30g of sodium silicate, 15g of tartaric acid, and 5g of glycerol in 800mL of deion...

Embodiment 3

[0061] 1) Alkali washing and degreasing: with embodiment 2.

[0062] 2) Electropolishing: at 20°C, in a 250mL beaker, add 110mL of glacial acetic acid (content ≥ 99.5%), 140mL of perchloric acid (70-72%) and 1g of sodium perchlorate to prepare an electropolishing solution; Put the titanium alloy workpiece after alkali cleaning and degreasing treatment into the polishing electrolyte, use the workpiece as the anode and the stainless steel plate as the cathode, and apply 60A·dm -2 Electric current, power on for 5 minutes, take it out, and wash it with flowing deionized water for 2 minutes.

[0063] 3) Anodic oxidation coloring: at 25°C, add 50g of sodium phosphate, 40g of sodium silicate, 10g of tartaric acid, and 2g of glycerol in 800mL of deionized aqueous solution with stirring, then add deionized water to 1L after fully dissolving Prepared as an anodic oxidation coloring solution. Put the titanium alloy workpiece after the above treatment into this solution, use stainless s...

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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 anodic oxidation coloring on the surface of titanium alloy, in particular to a process for anodic oxidation coloring on the surface of fluorine-free and environment-friendly titanium alloy. Background technique [0002] In recent years, titanium alloys have attracted more and more attention because of their unique properties, so they are widely used in the fields of cutting-edge defense technology and civilian industries. For example: in aerospace, due to its small specific gravity, light weight and high specific strength, titanium alloys are used in the production of new generation aircraft; in medicine, titanium alloys have good biocompatibility and low repellency with the human body, and are widely used in teeth And bone implants, as well as medical devices such as vascular stents, have become an eye-catching biometal material; in construction, due to the unique characteristics of titanium alloys, its consumption has increas...

Claims

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Application Information

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