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Post treatment method for titanium alloy anodic oxide film

A technology of anodic oxide film and titanium alloy, which is applied in the post-treatment process of titanium alloy anodic oxide film and the field of surface treatment technology, can solve the problem of not effectively improving the service life of titanium alloy oxide film, not completely sealing the pores on the surface of the oxide film, The surface roughness of the anodized film is large, and the effects of reducing pollution and harm to the human body, single composition, and reduced surface roughness are achieved.

Inactive Publication Date: 2010-11-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the titanium alloy oxide film itself has many holes and gaps, so its specific surface area is relatively large, and it is easy to absorb water and corrosive substances in the environment. Corrosive substances will enter the interior of the film through these places, thereby reducing the film. In addition, the surface roughness of the anodized film is relatively large, so the titanium alloy oxide film needs further post-treatment, that is, sealing treatment
At present, the post-treatment of titanium alloy anodic oxidation film generally adopts the method of boiling water sealing. The energy consumption of boiling water sealing is relatively large, and the surface pores of the oxide film cannot be completely closed, so the service life of the titanium alloy oxide film cannot be effectively improved.

Method used

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  • Post treatment method for titanium alloy anodic oxide film
  • Post treatment method for titanium alloy anodic oxide film
  • Post treatment method for titanium alloy anodic oxide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Raw materials

[0020] TB6 titanium alloy sheet (length 10cm, width 2.5cm, thickness 2mm, the total area is about 50cm 2 ), anodized in an ammonium tartrate system.

[0021] 2. Post-processing steps

[0022] Oxide film → washing → post-treatment → washing → drying

[0023] 3. Post-processing step conditions

[0024] Calcium acetate 10g / L

[0025] Temperature 85~95℃

[0026] Post-processing time 15min

[0027] 4. Post-processing results

[0028] Under the conditions of this formula, the TB6 titanium alloy test piece forms a yellow film in the ammonium tartrate system, the surface is smooth and uniform, and the coverage is complete. After post-processing, the color remains largely unchanged and the surface appears smoother. The non-magnetic measurement method is used in accordance with the provisions of GB / T4957, and the thickness of the anodized film after post-treatment is measured with an eddy current thickness gauge, and the thickness is in the range of 8-9...

Embodiment 2

[0030] 1. Raw materials

[0031] TB6 titanium alloy sheet (length 10cm, width 2.5cm, thickness 2mm, the total area is about 50cm 2 ), anodized in an ammonium tartrate system.

[0032] 2. Post-processing steps

[0033] Oxide film → washing → post-treatment → washing → drying

[0034] 3. Post-processing step conditions

[0035] Calcium acetate 15g / L

[0036] Temperature 65~75℃

[0037] Post-processing time 10min

[0038] 4. Film formation result

[0039] Under the conditions of this formula, the TB6 titanium alloy test piece forms a yellow film in the ammonium tartrate system, the surface is smooth and uniform, and the coverage is complete. After post-processing, the color remains largely unchanged and the surface appears smoother.

Embodiment 3

[0041] 1. Raw materials

[0042] TC4 titanium alloy sheet (length 10cm, width 2.5cm, thickness 2mm, the total area is about 50cm 2 ), anodic oxidation is carried out in the sulfuric acid phosphoric acid system specified in HB / Z 347-2002.

[0043] 2. Post-processing steps

[0044] Oxide film → washing → post-treatment → washing → drying

[0045] 3. Post-processing step conditions

[0046] Calcium acetate 20g / L

[0047] Temperature 75~85℃

[0048] Post-processing time 20min

[0049] 4. Film formation result

[0050] Under such formula conditions, the TC4 titanium alloy test piece is gray in film formation in the sulfuric acid phosphoric acid system specified in HB / Z 347-2002, with a smooth and uniform surface and complete coverage. After post-processing, the color remains largely unchanged and the surface appears smoother.

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Abstract

The invention provides a calcium acetate system-based post treatment process for a titanium alloy oxide film. An anodic oxide film is treated by washing, post treatment, washing and drying. The process can effectively seal the titanium alloy oxide film without increasing a power supply, has the characteristics of convenient operation, simple technique and environment friendliness, and is a green and safe post treatment process for the titanium alloy oxide film.

Description

technical field [0001] The invention relates to a surface treatment process after titanium alloy anodic oxidation, in particular to a post-treatment process for titanium alloy anodic oxidation film under safe and environment-friendly conditions, and belongs to the technical field of metal surface treatment. Background technique [0002] Titanium and titanium alloys are new materials with high specific strength and strong corrosion resistance. They have extremely superior high temperature performance and easy passivation performance, and are widely used in many fields such as aerospace, ships, and chemistry. Anodizing is an effective surface treatment method that can improve the thickness of the oxide film and corrosion resistance of titanium alloys. It enables titanium alloys to be used in different working environments and meet different industrial and even medical uses. The properties of the anodized film mainly depend on its composition, structure and thickness. [0003]...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 刘建华吴量于美李松梅龙国荣甘武奎
Owner BEIHANG UNIV
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