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Method for preparing titanium or titanium alloy super-hydrophobic surface

A super-hydrophobic surface and titanium alloy technology, which is applied in the field of metal surface treatment, can solve the problems of no literature reports on the super-hydrophobic surface of titanium or titanium alloy, and achieve the effects of easy large-area preparation, high processing efficiency, and good super-hydrophobic performance

Inactive Publication Date: 2012-08-01
DALIAN UNIV OF TECH
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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 titanium or titanium alloy superhydrophobic surface by electrochemical method with neutral electrolyte.

Method used

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  • Method for preparing titanium or titanium alloy super-hydrophobic surface
  • Method for preparing titanium or titanium alloy super-hydrophobic surface
  • Method for preparing titanium or titanium alloy super-hydrophobic surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Cut the titanium plate and cathode copper plate into 20mm×30mm, the actual processing area is 20mm×20mm, and the rest is used for clamping and conducting. Before processing, the titanium plate and the cathode copper plate are ultrasonically cleaned with absolute ethanol and deionized water in sequence, and dried.

[0022] (2) Fix the titanium plate and cathode copper plate symmetrically in parallel, the distance between the two plates is 10mm, the two plates are connected to the DC power supply through wires, the titanium plate is connected to the positive pole of the power supply, and the cathode copper plate is connected to the negative pole of the power supply; put the two plates into a container containing 0.2mol / L NaCl aqueous solution; connect the DC power supply, start processing, and the current density is 1A / cm 2 . During processing, the solution temperature is room temperature (about 25° C.), and the processing time is 3 minutes.

[0023] (3) After the ...

Embodiment 2

[0025] (1) Cut the titanium plate and cathode copper plate into 20mm×30mm, the actual processing area is 20mm×20mm, and the rest is used for clamping and conducting. Before processing, the titanium plate and the cathode copper plate are ultrasonically cleaned with absolute ethanol and deionized water in sequence, and dried.

[0026] (2) Fix the titanium plate and cathode copper plate symmetrically in parallel, the distance between the two plates is 10mm, the two plates are connected to the DC power supply through wires, the titanium plate is connected to the positive pole of the power supply, and the cathode copper plate is connected to the negative pole of the power supply; put the two plates into a container containing 0.2mol / L NaBr aqueous solution; connect the DC power supply, start processing, the current density is 0.5A / cm 2 . During processing, the solution temperature is room temperature (about 25° C.), and the processing time is 15 minutes.

[0027] (3) After the p...

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Abstract

The invention discloses a method for preparing a titanium or titanium alloy super-hydrophobic surface. The method is characterized by comprising the following steps of: symmetrically placing titanium or titanium alloy as an anode and a cathode in parallel, and connecting the anode and the cathode with a direct-current power supply through lead wires, wherein the titanium or the titanium alloy is connected with a positive electrode, and the cathode is connected with a negative electrode; putting the anode and the cathode in electrolyte and switching on the power supply to carry out electrochemical etching, wherein the used electrolyte is NaCl or NaBr water solution; washing the etched titanium or titanium alloy and drying the etched titanium or titanium alloy with air; and modifying the surface of the obtained titanium or titanium alloy by using a material with lower surface energy, and drying the modified titanium or titanium alloy after taking out, so as to obtain the titanium or titanium alloy super-hydrophobic surface, wherein the material with the lower surface energy comprises fluorinated silane, stearic acid, palmitic acid, lauric acid or myristic acid. The method provided by the invention is simple in process, rapid, efficient and good in controllability. Particularly, the method is safe and environmentally-friendly due to the use of the neutral electrolyte, and has a wide application prospect in fields of aviation, aerospace, naval vessel and the like.

Description

technical field [0001] The invention relates to metal surface treatment, in particular to a process method for electrochemically preparing super-hydrophobic surface of titanium or titanium alloy. Background technique [0002] Titanium and titanium alloys have excellent properties such as high specific strength, good heat resistance, and corrosion resistance. The superhydrophobic surface has the characteristics of self-cleaning, drag and friction reduction, frost prevention, and surface corrosion inhibition. Therefore, inventing a method for preparing superhydrophobic surfaces of titanium or titanium alloys is of great significance to the development of industries such as aviation, aerospace, ships, and weapons. [0003] The preparation of titanium or titanium alloy superhydrophobic surface generally requires two steps: one is to roughen the surface to construct a micro-nano rough structure; the other is to reduce its surface energy, usually by using low surface energy materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/08
Inventor 徐文骥陆遥宋金龙刘新孙晶
Owner DALIAN UNIV OF TECH
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