Metallographic etching solution for medical titanium alloy bone fracture fixation plate and etching method

Abstract

The invention discloses a metallographic etching solution for a medical titanium alloy bone fracture fixation plate and an etching method. The etching solution comprises components in percentage by volume as follows: 1-3% of hydrofluoric acid, 3-5% of nitric acid and the balance of water. The etching method comprises steps as follows: polishing, etching, washing, cleaning, blow-drying and then observation of a metallographic phase. With the adoption of the metallographic etching solution and the etching method, a metallographic structure of the titanium alloy bone fracture fixation plate can be clearly displayed, and the etching solution is simple to match and causes little harm to operators.

Description

Technical field

[0001] The invention relates to the field of bone joint implants, in particular to a metallographic corrosion solution and corrosion method for medical titanium alloy bone plates. Background technique

[0002] The medical titanium alloy bone plate belongs to the category of medical "bone joint implants". It is a titanium alloy plate that is bionically designed and processed according to the shape of the human bones and is used in bone fixation in surgical operations. The medical titanium alloy bone plate has the advantages of high human compatibility, high strength, and resistance to body fluids.

[0003] The organization of metal materials is an internal factor that affects the mechanical properties and corrosion resistance of metal materials. In order to understand the tissue composition and morphology of the medical titanium alloy bone plate, a method often used by the majority of scientific research workers and analysis and testers is the observation of metallo...

Examples

Embodiment 1

[0027] The first embodiment is to use hydrofluoric acid (49% by mass percentage, analytically pure), nitric acid (70% by mass percentage, analytically pure) and water in the volume of 1ml, 2ml, 47ml to prepare the etching solution, at room temperature Soak the polished titanium alloy bone plate in the corrosive solution for 45S, and then take out the titanium alloy bone plate, immediately rinse with clean water (may be tap water), then rinse with absolute ethanol, and then dry it with a hair dryer in cold air. The appearance of the metallographic structure obtained by microscope observation figure 1 . From figure 1 It can be seen that the metallographic structure obtained is clear and complete.

Embodiment 2

[0028] Example two, using hydrofluoric acid (weight percentage concentration of 49%, analytically pure), nitric acid (mass percentage concentration of 70%, analytically pure), and water were used in the volume of 2ml, 5ml, 93ml to prepare the corrosion solution, at room temperature Soak the polished titanium alloy bone plate gold in the corrosive solution for 30 seconds, then take out the titanium alloy bone plate, immediately rinse with clean water (may be tap water), then rinse with absolute ethanol and dry it with a hair dryer. The initial observation of the metallographic microscope in the metallographic microscope is not clear. After the second polishing, etching, cleaning and drying, the appearance of the metallographic structure observed afterwards is shown figure 2 . From figure 2 It can be seen that the metallographic structure obtained is clear and complete.

Embodiment 3

[0029] Example three, using hydrofluoric acid (weight percentage concentration of 49%, analytically pure), nitric acid (mass percentage concentration of 70%, analytically pure) and water in the volume of 1ml, 3ml, 96ml to prepare the corrosion solution, at room temperature Soak the polished titanium alloy bone plate gold in the corrosive solution for 20 seconds, then take out the titanium alloy bone plate, immediately rinse with clean water (may be tap water), then rinse with absolute ethanol and dry it with a hair dryer in cold air. The metallographic structure is obtained from the preliminary observation of the metallographic structure. In this embodiment, the amount of reagent is small, the cost is reduced, and the speed is fast, and the metallographic structure can be obtained quickly.

Technical field

[0001] The invention relates to the field of bone joint implants, in particular to a metallographic corrosion solution and corrosion method for medical titanium alloy bone plates. Background technique

[0002] The medical titanium alloy bone plate belongs to the category of medical "bone joint implants". It is a titanium alloy plate that is bionically designed and processed according to the shape of the human bones and is used in bone fixation in surgical operations. The medical titanium alloy bone plate has the advantages of high human compatibility, high strength, and resistance to body fluids.

[0003] The organization of metal materials is an internal factor that affects the mechanical properties and corrosion resistance of metal materials. In order to understand the tissue composition and morphology of the medical titanium alloy bone plate, a method often used by the majority of scientific research workers and analysis and testers is the observation of metallo...

Examples

Embodiment 1

[0027] The first embodiment is to use hydrofluoric acid (49% by mass percentage, analytically pure), nitric acid (70% by mass percentage, analytically pure) and water in the volume of 1ml, 2ml, 47ml to prepare the etching solution, at room temperature Soak the polished titanium alloy bone plate in the corrosive solution for 45S, and then take out the titanium alloy bone plate, immediately rinse with clean water (may be tap water), then rinse with absolute ethanol, and then dry it with a hair dryer in cold air. The appearance of the metallographic structure obtained by microscope observation figure 1 . From figure 1 It can be seen that the metallographic structure obtained is clear and complete.

Embodiment 2

[0028] Example two, using hydrofluoric acid (weight percentage concentration of 49%, analytically pure), nitric acid (mass percentage concentration of 70%, analytically pure), and water were used in the volume of 2ml, 5ml, 93ml to prepare the corrosion solution, at room temperature Soak the polished titanium alloy bone plate gold in the corrosive solution for 30 seconds, then take out the titanium alloy bone plate, immediately rinse with clean water (may be tap water), then rinse with absolute ethanol and dry it with a hair dryer. The initial observation of the metallographic microscope in the metallographic microscope is not clear. After the second polishing, etching, cleaning and drying, the appearance of the metallographic structure observed afterwards is shown figure 2 . From figure 2 It can be seen that the metallographic structure obtained is clear and complete.

Embodiment 3

[0029] Example three, using hydrofluoric acid (weight percentage concentration of 49%, analytically pure), nitric acid (mass percentage concentration of 70%, analytically pure) and water in the volume of 1ml, 3ml, 96ml to prepare the corrosion solution, at room temperature Soak the polished titanium alloy bone plate gold in the corrosive solution for 20 seconds, then take out the titanium alloy bone plate, immediately rinse with clean water (may be tap water), then rinse with absolute ethanol and dry it with a hair dryer in cold air. The metallographic structure is obtained from the preliminary observation of the metallographic structure. In this embodiment, the amount of reagent is small, the cost is reduced, and the speed is fast, and the metallographic structure can be obtained quickly.

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