Polishing solution and polishing method for medical titanium alloy

A technology of titanium alloy and polishing liquid is applied in the field of polishing pretreatment of medical titanium alloy, which can solve the problem that the surface of medical titanium alloy is difficult to obtain a mirror effect and the like, and achieve the effect of easy polishing

Inactive Publication Date: 2012-07-04
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to: provide a kind of medical titanium alloy polishing liquid and polishing method, solve the defect that the polishing lines on the medical titanium alloy surface are difficult to obtain the mirror surface effect after

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Polishing medical pure titanium with a size of 20mm×20mm×5 mm

[0022] (1) Sanding and degreasing: Use 600#, 800#, 1000#, 1200# SiC sandpaper to polish the sample, remove the burr and oxide layer on the surface of the material, reduce the surface roughness, improve the mirror effect, and then Place the sample in ethanol or acetone solution for ultrasonic cleaning;

[0023] (2) Electrochemical polishing: Mix 50 ml of perchloric acid, 450 ml of methanol, 500 ml of ethylene glycol, and 5 g of sodium saccharin to make 1 L of polishing liquid;

[0024] Connect the cleaned medical pure titanium sample to the positive electrode of the DC steady-current power supply, connect the stainless steel plate to the negative electrode of the DC steady-current power supply, and put it into the electrolytic cell containing the above-mentioned electrochemical polishing solution for electrochemical polishing. Pure titanium is used as the anode, and the stainless steel plate is u...

Embodiment 2

[0025] Example 2: Polishing of medical NiTi alloy with dimensions of 20mm × 20mm × 5 mm

[0026] (1) Sanding and degreasing: Use 600#, 800#, 1000#, 1200# SiC sandpaper to polish the medical NiTi alloy sample, remove the burr and oxide layer on the surface of the material, reduce the surface roughness, and improve the mirror effect , and then place the sample in ethanol or acetone solution for ultrasonic cleaning;

[0027] (2) Electrochemical polishing: Mix 70 ml of perchloric acid, 525 ml of methanol, 405 ml of ethylene glycol, and 2 g of gelatin to make 1 L of polishing solution;

[0028] Connect the cleaned medical NiTi alloy sample to the positive electrode of the DC steady-current power supply, connect the stainless steel plate to the negative electrode of the DC steady-current power supply, and put it into the electrolytic cell containing the above-mentioned electrochemical polishing solution for electrochemical polishing. The NiTi alloy is used as the anode, the stainl...

Embodiment 3

[0029] Example 3: Polishing of medical TC4 alloy with dimensions of 20mm×20mm×5 mm

[0030] (1) Sanding and degreasing: Use 600#, 800#, 1000#, 1200# SiC sandpaper to polish the medical TC4 alloy sample, remove the burr and oxide layer on the surface of the material, reduce the surface roughness, and improve the mirror effect ; Place the sample in ethanol or acetone solution for ultrasonic cleaning;

[0031] (2) Electrochemical polishing: Mix 85 ml of perchloric acid, 525 ml of methanol, 390 ml of ethylene glycol, and 6 g of sodium stearate to make 1 L of polishing liquid; mix the cleaned medical TC4 alloy sample with The positive pole of the DC steady current power supply is connected, the stainless steel plate is connected with the negative pole of the DC steady current, and placed in the electrolytic cell containing the above electrochemical polishing solution for electrochemical polishing treatment. The medical TC4 alloy to be treated is used as the anode, and the stainle...

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Abstract

The invention discloses a polishing solution and a polishing method for a medical titanium alloy, and belongs to the field of surface treatment. 1L of polishing solution comprises 50 to 100ml of perchloric acid, 500 to 550ml of methanol, 350 to 450ml of ethylene glycol and 2 to 10g of brightener. The polishing method comprises the following steps of: performing simple mechanical polishing on the titanium alloy, and performing electrochemical polishing, wherein electrolyte for electrochemical polishing is the polishing solution. For polishing treatment before the medical titanium alloy is used, the related polishing solution for the titanium alloy does not contain hydrofluoric acid, and volatile substances which are harmful to human health and strong pungent smell cannot be generated; and compared with the traditional mechanical polishing and chemical polishing, electrochemical polishing has the advantages that: the titanium alloy subjected to electrochemical polishing treatment has a bright and flat surface and does not have any scratch or line, and an irregular part can achieve a mirror surface effect after being polished.

Description

technical field [0001] The invention relates to a medical titanium alloy polishing liquid and a polishing method, in particular to the polishing pretreatment of the medical titanium alloy. Background technique [0002] Due to its high mechanical strength and corrosion resistance, low elastic modulus and density, and excellent biocompatibility, titanium alloys are widely used in the production of clinical artificial bones, joints, teeth and other implants. objects and orthopedics. The corrosion resistance of titanium alloy decreases with the increase of its surface finish, among which smooth surface and microscopically rough surface have good corrosion resistance and low ion release rate. Therefore, proper surface finishing treatment of medical titanium alloy can increase the corrosion resistance of titanium alloy implants and reduce the release rate of metal ions. [0003] Commonly used medical titanium alloy polishing methods can be divided into three types: mechanical p...

Claims

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Application Information

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IPC IPC(8): C25F3/26
Inventor 周广宏丁红燕周长培章跃夏木建朱雨富林岳宾
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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