Preparation method of titanium and titanium alloy surface black protective film for surgical implantation

A surgical implant, titanium alloy technology, applied in the surface reaction electrolytic coating, medical science, electrolytic coating, etc., can solve the problem that the bonding force of the anodized film cannot fully meet the requirements of use, and the white and black oxide film cannot be obtained. Film color change and other problems, to achieve the effect of novel design, consistent thickness and good hardness

Active Publication Date: 2010-03-03
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Description
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  • Application Information

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Problems solved by technology

However, due to the low voltage, the film formed by anodic oxidation is generally thinner, and the color level of colored titanium depends on the film thickness, so white and black oxide films cannot be obtained by anodic oxidation.
At the same time, the bonding force of the anodized film cannot fully meet the requirements of use, and the pollution of fingerprints will easily change the color of the anodized film and cause poor wear resistance.

Method used

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  • Preparation method of titanium and titanium alloy surface black protective film for surgical implantation

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preparation example Construction

[0028] like figure 1 As shown, the preparation method of titanium and titanium alloy surface black protective film for surgical implant of the present invention may further comprise the steps:

[0029] Step 1. Perform micro-arc oxidation coloring treatment on the surface of the titanium or titanium alloy sample to be treated. The process is as follows:

[0030] 101. Preparation of micro-arc oxidation electrolyte: the electrolyte is made of (NaPO 3 ) 6 , NH 4 VO 3 、Na 2 SiO 3 It is uniformly mixed with NaOH solution and its pH value is 9-11; in each L of electrolyte (NaPO 3 ) 6 The content is 5~20g, NH 4 VO 3 The content is 3~25g, Na 2 SiO 3 The content is 3 ~ 10g.

[0031] 102. Micro-arc oxidation coloring treatment: completely immerse the titanium or titanium alloy sample in a container containing the electrolyte, and use micro-arc oxidation equipment to perform micro-arc oxidation coloring treatment on the surface of the titanium or titanium alloy sample until A...

Embodiment 1

[0037] In this embodiment, the processed titanium or titanium alloy sample is a pure titanium sample. First, the micro-arc oxidation electrolyte is prepared, and the prepared micro-arc oxidation electrolyte is made of (NaPO 3 ) 6 , NH 4 VO 3 、Na 2 SiO 3 It is uniformly mixed with NaOH solution and its pH value is 10; and in each L of electrolyte (NaPO 3 ) 6 The content is 10g, NH 4 VO 3 The content is 20g, Na 2 SiO 3 The content is 8g. During the preparation process, the pH value of the electrolyte solution is adjusted by adjusting the amount of NaOH solution added. After preparing the micro-arc oxidation electrolyte, completely immerse the pure titanium sample to be processed into the prepared electrolyte, and perform micro-arc oxidation coloring treatment: during the micro-arc oxidation coloring process, the work of the micro-arc oxidation power supply The frequency is 600Hz and its duty cycle is 16%; when the micro-arc oxidation coloring treatment starts, the op...

Embodiment 2

[0040] In this example, the difference from Example 1 is: the pH value of the prepared micro-arc oxidation electrolyte is 9; and in every L of electrolyte (NaPO 3 ) 6 The content is 5g, NH 4 VO 3 The content is 3g, Na 2 SiO 3 The content is 3g. When performing micro-arc oxidation coloring treatment, the operating frequency of the micro-arc oxidation power supply is 500Hz and its duty cycle is 14%. When the micro-arc oxidation coloring treatment starts, the operating voltage of the micro-arc oxidation power supply is 300V, and then Carrying out the micro-arc oxidation coloring treatment and raising the working voltage of the micro-arc oxidation power supply to 450V after arcing on the surface of the pure titanium sample, the boosting time used for raising the working voltage of the micro-arc oxidation power supply to 450V The treatment time for micro-arc oxidation coloring treatment is 20 minutes. Na in each L of mixed solution prepared 3 PO 4 12H 2 The content of O wa...

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Abstract

The invention discloses a preparation method of a titanium and titanium alloy surface black protective film for surgical implantation, comprising the following steps: step 1: carrying out micro-arc oxidation coloring processing on titanium and titanium alloy surface to be processed, in the process, firstly, preparing a micro-arc oxidation electrolysing solution, and then carrying out the micro-arcoxidation coloring processing; and step 2: carrying out subsequent processing on the micro-arc oxidation film, wherein the subsequent processing comprises the following steps: firstly, preparing a mixed solution for hydro-thermal processing, completely dipping the titanium and titanium alloy after micro-arc oxidation shading processing in the mixed solution, carrying out the hydro-thermal processing on the surface by adopting a hydro-thermal method, drying the titanium and titanium alloy under the condition of low temperature when the hydro-thermal processing is completed, and generating a layer of pure black micro-arc oxidation film with uniform and plump surface on the titanium and titanium alloy surface. The invention has simple and convenient operation, economy, high production efficiency, and high bonding strength between a generated ceramic film, i.e. the micro-arc oxidation film and a substrate, and the invention can effectively overcome various defects and deficiencies which exist in the prior coating processing techniques.

Description

technical field [0001] The invention belongs to the technical field of surface modification of titanium and titanium alloys for surgical implantation, and in particular relates to a method for preparing a black protective film on the surface of titanium and titanium alloys for surgical implantation. Background technique [0002] Titanium and titanium alloys are widely used as human hard tissue repair and replacement materials (teeth, bone, joints, etc.), and have become one of the most promising medical materials. However, the material has low hardness and poor wear resistance. Therefore, after implantation in the human body, wear debris is often generated and dissociated near the implant, which is easy to cause inflammation; and in a physiological environment, metal ions are easily released due to corrosion. The poor wear resistance of titanium alloys is mainly due to: 1. Titanium alloys have low plastic shear resistance and work hardening properties, which are not enough t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26A61L27/06
Inventor 麻西群于振涛余森牛金龙袁思波贺新杰皇甫强
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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