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A method and application of stripping titanium surface coating by nanotube treatment

A technology of surface coating and nanotubes, which is applied in the preparation of coating cross-section scanning electron microscope samples and electrochemical treatment, which can solve the problems of difficult coating

Active Publication Date: 2017-01-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a good bond is often formed between the coating and the substrate, which is the prerequisite for the coating to function. It is not easy to peel off the coating on the titanium-based surface without damage.

Method used

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  • A method and application of stripping titanium surface coating by nanotube treatment
  • A method and application of stripping titanium surface coating by nanotube treatment
  • A method and application of stripping titanium surface coating by nanotube treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Sample coating preparation: TA1 pure titanium sheets with a size of 10×10×1 mm were polished and polished with 400, 600, and 800 mesh SiC sandpaper in sequence, and then ultrasonically cleaned with acetone, absolute ethanol, and deionized water for 5 min respectively; Anodizing in constant voltage mode in 1 M sulfuric acid electrolyte, the final voltage was 180V, and kept for 1min after reaching the final voltage. XRD detection shows that the coating on the surface of the sample is a polycrystalline titanium dioxide coating with rutile phase as the main crystal phase and a small amount of anatase phase.

[0027] Then, the treated TC4 pure titanium sheet was ultrasonically cleaned with acetone, absolute ethanol and deionized water in sequence, and dried for later use at a drying temperature of 50°C for 1 hour;

[0028] Sample nanotube stripping coating: weigh NH 4 Dissolve 5.2 grams of F in 40 ml of deionized water, mix with 360 ml of glycerin, and stir the solution eve...

Embodiment 2

[0030] Sample coating preparation: TC4 pure titanium sheets with a size of 20×20×2 mm were polished and polished with 400, 600, 800, and 1000 mesh metallographic sandpaper in sequence, and then ultrasonically cleaned with acetone, absolute ethanol, and deionized water for 5 min; anodize in constant voltage mode in 1 M sulfuric acid electrolyte, the final voltage is 150V, and keep for 1min after reaching the final voltage. A brick-red titanium dioxide coating was obtained on the surface of the sample.

[0031] Then the TC4 pure titanium sheet was ultrasonically cleaned with acetone, absolute ethanol and deionized water in sequence, and dried for later use at a drying temperature of 60°C for 0.5h;

[0032] Sample nanotube stripping coating: weigh NH 4Dissolve 5.2 grams of F in 40 ml of deionized water, mix with 360 ml of glycerin, and stir the solution evenly to obtain an electrolyte solution. Use the titanium alloy sheet as the anode and the titanium foil as the cathode, imme...

Embodiment 3

[0034] Sample coating preparation: β-alloy sheets (grades) with a size of 5×5×1 mm were polished and polished with 400, 600, and 800-mesh metallographic sandpaper in turn, and then ultrasonically cleaned with acetone, absolute ethanol, and deionized water for 5 min; anodize in constant voltage mode in 1 M sulfuric acid electrolyte, the final voltage is 150V, and keep for 1min after reaching the final voltage. A titanium dioxide coating was obtained on the surface of the sample.

[0035] Then, the β-alloy sheet was ultrasonically cleaned with acetone, absolute ethanol and deionized water in sequence, and dried for later use at a temperature of 55°C for 0.8 hours;

[0036] Sample nanotube stripping coating: weigh NH 4 Dissolve 5.2 grams of F in 40 ml of deionized water, mix with 360 ml of glycerin, and stir the solution evenly to obtain an electrolyte solution. Use the titanium alloy sheet as the anode and the titanium foil as the cathode, immerse the titanium alloy sheet belo...

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Abstract

The invention discloses a method and an application of peeling a coating on the surface of a pure titanium matrix or the surface of a titanium alloy matrix from the matrix. The method comprises the following steps: cleaning; preparing an electrolyte; oxidizing; pressurizing; drying and the like, so as to solve the technical problem that the coating on the surface of the pure titanium matrix or the surface of the titanium alloy matrix is hard to peel. According to the method disclosed by the invention, the inner structure of the coating is not damaged, and the realest information inside the coating can be retained; the maximum use of the method is preparation of a coating profile scanning electron microscope sample for observing the shape of the coating profile, so that the realest profile structure characteristics of the coating are retained. The method can be further used for measuring the thickness of the coating. The method can be further used in other applications for removing, transferring the coating on the surface of the pure titanium matrix or the surface of the titanium alloy matrix and the like.

Description

technical field [0001] The invention belongs to the technical field of titanium-based surface coating stripping and coating detection, and relates to an electrochemical treatment method for stripping various coatings from pure titanium or titanium alloy substrates, and the method can be used to prepare coating cross-section scanning electron microscope samples . Background technique [0002] Titanium and titanium alloys have many advantages such as high specific strength, good corrosion resistance, good biocompatibility, etc., and become one of the most eye-catching metal materials in the 21st century. They are widely used in aerospace, sports equipment, medical equipment and other fields. "Space metal", "aero metal" and "biophilic metal" and other reputations. However, titanium and titanium alloys often require surface modification or coating to have improved or new mechanical, biological or chemical properties to meet the requirements of special applications, see referenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26G01N1/28
CPCC25D11/26G01N1/2813
Inventor 田卫东郭维华谢利霍芳军
Owner SICHUAN UNIV
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