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Method for preparing ultra-hydrophobic surface on titanium-alloy

A super-hydrophobic, titanium alloy technology, applied in the field of preparing super-hydrophobic surfaces, to achieve the effect of simple preparation process, good mechanical properties, and not easy to be damaged

Inactive Publication Date: 2008-06-04
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature report on the preparation of superhydrophobic surface on titanium alloy by sandblasting technology.

Method used

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  • Method for preparing ultra-hydrophobic surface on titanium-alloy
  • Method for preparing ultra-hydrophobic surface on titanium-alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Clean the titanium alloy sample with an ultrasonic cleaner. The cleaning steps are: 1) put the titanium alloy sample in acetone and clean it with ultrasonic waves for 30 minutes to remove the grease on the sample, 2) then wash it with deionized water for 5 minutes, 3 ) and finally dried in a vacuum oven at 50° C. for 30 minutes before use.

[0030] The treated titanium alloy samples were sandblasted. The working pressure is 0.5MPa, the working time is 20s, and the working distance is 5cm.

[0031] The sand-blasted titanium alloy samples were de-sanded. Immerse the sandblasted titanium alloy sample in 0.5M200ml hydrofluoric acid aqueous solution for 20 minutes to remove the silicon dioxide particles on the surface of the titanium alloy and form a uniform porous structure on the surface.

[0032] Wash the soaked titanium alloy sample with a large amount of deionized water to remove excess impurities on the surface of the sample after soaking. Finally, dry the treated s...

Embodiment 2

[0035] According to the operation and steps of Example 1, the working pressure of sandblasting is changed to 0.6MPa. The contact angle between the surface of the obtained superhydrophobic titanium alloy and water is 157±1.6°, and the surface of the titanium alloy also has a porous structure, wherein the pore size is 5-8 μm.

Embodiment 3

[0037] According to the operation and steps of Example 1, the concentration of hydrofluoric acid soaked is changed to 0.1MPa. The contact angle between the surface of the obtained superhydrophobic titanium alloy and water is 151±1.6°, and the surface of the titanium alloy also has a porous structure, wherein the pore size is 10-12 μm.

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Abstract

The invention discloses a method for preparing a super-hydrophobic surface on a titanium alloy, wherein, the super-hydrophobic titanium alloy surface is prepared after sand blasting and desanding treatments of the titanium alloy; the prepared titanium alloy surface comprises preferable cellular structures which are evenly distributed and has good mechanical property and superior super-hydrophobic property; under room temperature, contact angle of the titanium alloy surface and water is larger than 150 DEG. The invention has the characteristics of simple technique, good controllability, high efficiency, low pollution, low cost and so on. The super-hydrophobic surface obtained does not any chemical decoration, thereby the invention is an environment friendly preparation method.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophobic surface on a titanium alloy. Background technique [0002] Titanium alloys are widely used in spacecraft machinery because of their low density, excellent mechanical properties and high resistance to stress corrosion cracking. The main disadvantage is that the anti-friction and wear performance is not good, and its tribological performance can be improved by surface treatment. Titanium alloys exhibit high and variable coefficients of friction (μ>0.5) under the condition of self-alignment in vacuum. Therefore, it is very necessary to treat the surface of titanium alloy by surface engineering technology to improve the physical and chemical properties of its surface. [0003] Chinese patent (CN 1439741A) describes a method for electroless nickel plating on titanium alloys, which is characterized in that the film removal and activation solution developed can remove the film and activat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/26B24C1/10
Inventor 刘维民郭志光
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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