Method for preparing titanium-alloy super-hydrophobic surface with low roughness

A super-hydrophobic surface, low-roughness technology, applied in surface reaction electrolytic coatings, electrolytic coatings, coatings, etc., can solve the problems of large surface roughness, high cost, low efficiency, etc., and achieve a simple and easy process. Effect

Active Publication Date: 2014-08-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese Patent No. CN102618913A discloses a method of anodically etching titanium or titanium alloys in NaCl or NaBr solution to construct a micro-nano rough structure and modifying with fluorosilane to obtain a super-hydrophobic surface. This method has high efficiency, but due to The unevenness of anode etching can easily lead to large surface roughness; Zhang et al. in F. Zhang, S. Chen, L. Dong, Y. Lei, T. Liu, Y. Yin, Appl. Surf. In 257 and 2587, pure titanium is first put into an ethylene glycol solution containing am...

Method used

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  • Method for preparing titanium-alloy super-hydrophobic surface with low roughness
  • Method for preparing titanium-alloy super-hydrophobic surface with low roughness
  • Method for preparing titanium-alloy super-hydrophobic surface with low roughness

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Effect test

Embodiment 1

[0015] 1) Cut both the titanium alloy (Ti-6Al-4V) plate and the graphite plate into 20mm×30mm, but the actual processing area is 20mm×20mm, and the rest is used for clamping and conduction. Before processing, sand the titanium alloy plate with 1500# sandpaper, then ultrasonically clean it in acetone, ethanol, and deionized water for 3 minutes to remove oil stains.

[0016] 2) Place the titanium alloy plate and the graphite plate in parallel and face to face, with an interval of 15mm, connect the two plates to the DC power supply with a wire, the titanium alloy plate is connected to the positive electrode, and the graphite plate is connected to the negative electrode. At the same time, put the two plates into the mixed solution containing 1.5mol / L NaOH and 0.15mol / L H2O2, turn on the magnetic stirrer (1000r / min), connect the DC power supply, and the voltage is fixed at 10V. The oxidation time was 30 min, and the solution temperature during processing was about room temperature ...

Embodiment 2

[0020] According to the operation and steps of Example 1, the oxidation time was changed to 60min. The obtained superhydrophobic surface of the titanium alloy has no obvious change in the microscopic morphology, and has a pore structure, and the pore size is also 5-10 μm. The superhydrophobic surface roughness Ra is 0.822 μm, the contact angle to water droplets is 158.8°, and the rolling angle is 5.1°.

Embodiment 3

[0022] According to the operation and steps of Example 1, the constant voltage was changed to 15V. The obtained superhydrophobic surface of the titanium alloy still has a randomly distributed hole structure, and the hole size is 5-10 μm. The superhydrophobic surface roughness Ra is 0.785 μm, the contact angle to water droplets is 157.8°, and the rolling angle is 5.6°.

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Abstract

The invention provides a method for preparing a super-hydrophobic surface with low roughness on titanium alloy, belongs to the field of surface treatment on metal materials, and relates to a technical method for preparing a titanium-alloy super-hydrophobic surface by adopting electrochemical anodic oxidation in an alkaline solution. The titanium-alloy super-hydrophobic surface with the low roughness is prepared by the adoption of the electrochemical anodic oxidation in the alkaline solution, and the method comprises the following steps: adopting metallographic abrasive paper to polish the titanium alloy; putting the polished titanium alloy into acetone, ethanol and deionized water respectively for ultrasonic cleaning in order to eliminate oil stain; placing a titanium-alloy plate adopted as the anode and a graphite plate adopted as the cathode in parallel symmetrically, and connecting the titanium-alloy plate, which is connected with the positive pole, and the graphite plate, which is connected with the negative pole, with a direct current supply through conducting wires respectively; conducting anodic oxidation; after the anodic oxidation, putting the titanium alloy into the deionized water for ultrasonic cleaning. The method is economical, high-efficient, simple in technology and good in controllability; particularly, the prepared super-hydrophobic surface is low in roughness.

Description

technical field [0001] The invention belongs to the field of metal material surface treatment, in particular to a process method for preparing a titanium alloy super-hydrophobic surface by electrochemical anodic oxidation in an alkaline solution. Background technique [0002] A superhydrophobic surface refers to a surface with a contact angle with water droplets greater than 150° and a rolling angle less than 10°, which has the characteristics of self-cleaning, anti-corrosion, anti-icing, and water flow drag reduction. The super-hydrophobic surface is applied to metal materials, which can play the role of anti-fouling, anti-rust, and anti-icing; applied to the shell of ships or the inner wall of pipes, it can effectively reduce the frictional resistance with the water flow. Titanium alloy has the characteristics of light weight, high strength, high temperature resistance, corrosion resistance, etc. It has very important applications in many industries such as aviation, chemi...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 孙玉文高玉泽郭东明
Owner DALIAN UNIV OF TECH
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