Method for preparing black titanium oxide coating on titanium surface

A technology for titanium metal and titanium oxide is applied in the field of preparing micro-arc oxidation coating on the surface of titanium metal, which can solve the problems of high energy consumption, high cost and complicated preparation process, and achieve the effects of low energy consumption, simple operation and uniform surface

Inactive Publication Date: 2010-07-14
HARBIN INST OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex preparation process, high energy consumption and high cost of forming a black tit

Method used

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  • Method for preparing black titanium oxide coating on titanium surface
  • Method for preparing black titanium oxide coating on titanium surface
  • Method for preparing black titanium oxide coating on titanium surface

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specific Embodiment approach 1

[0014] Embodiment 1: The method for preparing a black titanium oxide coating on the surface of titanium metal in this embodiment is realized through the following steps: one, carry out degreasing treatment on titanium metal parts; two, adopt high-voltage high-frequency bipolar pulse power supply, with The titanium metal part is the anode, and the stainless steel is the cathode. Immerse the titanium metal parts and stainless steel in the micro-arc oxidation electrolyte, adjust the pulse parameters as pulse voltage 400-600V, frequency 400-800Hz, duty cycle 4%-20%, start the power supply Perform micro-arc oxidation for 10 to 200 minutes to prepare a black titanium oxide coating on the surface of titanium metal parts, wherein the micro-arc oxidation electrolyte is to add metal-containing vanadium with a mass concentration of 4 to 10 g / L in the alkaline electrolyte system Cationic vanadate is obtained, and the temperature of the electrolyte is controlled at 35-50°C during the micro-...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that the specific operation of degreasing the titanium metal parts in step 1 is: immerse the titanium metal parts in acetone, then ultrasonically clean them for 2 to 10 minutes, and then use After washing with ion water, let it dry naturally. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the titanium metal in the titanium metal part in step 2 is pure titanium, TC4 alloy, TA15 alloy, TC16 alloy, TB8 alloy or titanium-aluminum alloy. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

[0020] In this embodiment, pure titanium is TA1, TA2, TA3. Titanium aluminum alloy is TI-(45-46)Al-(6-9)Nb, Ti-(45-46)Al-(6-9)V, Ti3Al alloy.

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Abstract

The invention discloses a method for preparing a black titanium oxide coating on a titanium surface, which relates to a method for preparing a micro-arc oxidation coating on a titanium surface. The invention solves the problems of complexity, high energy consumption and high cost of the traditional preparation process of forming a black titanium oxide film on the titanium surface. The method is characterized in that a titanium part is taken as the anode after being degreased, stainless steel is taken as the cathode, the anode and the cathode are soaked in an electrolyte, and micro-arc oxidation is carried out after electrical parameters are regulated, thereby the black titanium oxide coating on the titanium surface is obtained. The invention simplifies the process and has simple operation, energy and time saving and low cost by adopting a single-step micro-arc oxidation process; the obtained black titanium oxide coating is even and has high blackness, and the emission coefficient is 0.85 to 1.0 within the infrared wavelength range of 8 to 14mum; and the reflection coefficient of the wavelength of the black titanium oxide coating is 0.02 to 0.15, and thereby, the black titanium oxide coating is used for the field of military thermal control and civil decorative coatings. The invention is not limited by the shape and the dimension of the part, thereby being suitable for industrial mass production.

Description

technical field [0001] The invention relates to a method for preparing a micro-arc oxidation coating on the surface of titanium metal. Background technique [0002] Due to its high specific strength, high corrosion resistance and other excellent properties, titanium metal can replace heavy high-strength steel materials (such as 30CrMnSi steel) and is widely used in marine ships, aerospace, weaponry and other industries. It is also used in food processing, medical and health (such as surgical instruments or hard bone implant replacement materials) and daily products (such as mobile phone casings) and other fields have attractive application potential. In the above applications, in order to achieve the special requirements of reducing light reflection, increasing infrared heat emission, and improving decorative performance, it is necessary to prepare a layer of black coating on the surface of titanium metal. [0003] Invention patent 200710188529.0 discloses a method for prep...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 王亚明吴骋捷欧阳家虎侯正全李宝辉郭立新周玉
Owner HARBIN INST OF TECH
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