Polishing solution for electrochemical polishing of nickel-titanium alloy and application

A nickel-titanium alloy and polishing liquid technology, applied in the chemical industry, can solve problems such as unstable quality, poor operating environment, and environmental pollution, and achieve the effects of good composition stability, low cost, and less environmental pollution

Inactive Publication Date: 2018-02-09
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a kind of polishing liquid and purposes for nickel-titanium alloy electrochemical polishing, and described this polishing liquid and purposes for nickel-titanium alloy electrochemical polishing should solve The technical problems of the nickel-titanium alloy surface electrochemical polishing treatment method in the prior art are unstable quality, serious environmental pollution, and poor operating environment

Method used

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  • Polishing solution for electrochemical polishing of nickel-titanium alloy and application
  • Polishing solution for electrochemical polishing of nickel-titanium alloy and application
  • Polishing solution for electrochemical polishing of nickel-titanium alloy and application

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preparation example Construction

[0030] Preparation, characterization and measuring instruments used in the present invention:

[0031] Quanta FEG450 scanning electron microscope (SEM) with X-ray energy spectrometer (EDS), American FEI company;

[0032] TAYLOR HOBOSN roughness profiler;

[0033] CHI660E electrochemical workstation, Shanghai Chenhua.

Embodiment 1

[0035] The electrolytic polishing solution and polishing method for a nickel-titanium alloy device involved in the present invention have an external diameter of 2 mm, a wall thickness of 0.1 mm, and a length of 10 mm for a nickel-titanium alloy pipe material Ni55Ti45, which is polished to make it appear mirror luster, specifically Proceed as follows:

[0036] Step 1: ultrasonically clean a nickel-titanium alloy pipe with an outer diameter of 2 mm, a wall thickness of 0.1 mm, and a length of 10 mm in acetone, purified water, and absolute ethanol for 10 minutes;

[0037] Step 2: Measure 210mL of concentrated sulfuric acid, 510mL of ethylene glycol, and 280mL of purified water in a fume hood with a graduated cylinder, add the concentrated sulfuric acid into the purified water and stir evenly, then add it to ethylene glycol after dilution, and stir for 10 minutes to mix well;

[0038] Step 3: Use the nickel-titanium alloy tube as the anode and the stainless steel as the cathode, ...

Embodiment 2

[0042] The electrolytic polishing solution and polishing method for a nickel-titanium alloy device involved in the present invention have an external diameter of 2 mm, a wall thickness of 0.1 mm, and a length of 10 mm for a nickel-titanium alloy pipe material Ni55Ti45, which is polished to make it appear mirror luster, specifically Proceed as follows:

[0043]Step 1: ultrasonically clean a nickel-titanium alloy pipe with an outer diameter of 2 mm, a wall thickness of 0.1 mm, and a length of 10 mm in acetone, purified water, and absolute ethanol for 10 minutes;

[0044] Step 2: Measure 430mL of concentrated sulfuric acid, 370mL of ethylene glycol, and 200mL of purified water in a fume hood with a graduated cylinder, add the concentrated sulfuric acid into the purified water and stir evenly, then add it to ethylene glycol after dilution, and stir for 10 minutes to mix well;

[0045] Step 3: Use the nickel-titanium alloy tube as the anode and the stainless steel as the cathode, i...

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Abstract

The invention provides a polishing solution for electrochemical polishing of a nickel-titanium alloy, and belongs to the field of nickel-titanium alloy surface treatment. The polishing solution is composed of the following matter of, by volume, 22%-43% of concentrated sulfuric acid, 37%-50% of ethylene glycol, 5%-10% of an additive agent and the balance water. The invention further discloses a method for electrochemical polishing of the nickel-titanium alloy, the nickel-titanium alloy is treated as the anode, a stainless steel plate is treated as the cathode, the anode and the cathode are placed into the electrical polishing solution, and electrochemical polishing is conducted. The electrochemical polishing solution and the polishing method can be used for polishing a medical nickel-titanium alloy, the nickel-titanium alloy which is subjected to polishing treatment is good in corrosion resistance. The formula of the nickel-titanium alloy electrochemical polishing solution is not proneto volatilizing, stable and environmentally friendly, low in cost and good in operating environment.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to an electrochemical polishing liquid, in particular to a polishing liquid for electrochemical polishing of a nickel-titanium alloy and its application. Background technique [0002] As a material that needs to be implanted into the human body for a long time, medical nickel-titanium alloy must not only have reliable mechanical properties, but also have good biocompatibility. The surface treatment of nickel-titanium alloy has an important influence on its mechanical properties, corrosion resistance and biological properties, so surface treatment is particularly important. Because electrochemical polishing can obtain smooth and uniform surfaces and can be applied to workpieces of various shapes, it has received widespread attention at home and abroad in the field of implantable medical devices and has been more and more widely used. However, due to the special electrochemical propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/22
CPCC25F3/22
Inventor 何代华张淼刘平刘新宽王艳艳张柯马凤仓陈小红李伟
Owner UNIV OF SHANGHAI FOR SCI & TECH
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