Method for improving high-temperature oxidation resistance of titanium-based alloy

A technology for resisting high temperature oxidation and titanium-based alloys, which is applied in the field of high temperature oxidation resistance of metal materials, can solve problems such as large energy consumption, and achieve the effects of simple preparation process, easy realization and convenient operation.

Inactive Publication Date: 2018-09-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of anodized film in this system requires a high voltage of 400 V, which consumes a lot of energy, and its performance improvement is limited to 800 °C.

Method used

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  • Method for improving high-temperature oxidation resistance of titanium-based alloy

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Embodiment 1

[0021] A method to improve the high-temperature oxidation resistance of titanium-based alloys. First, use 60-mesh iron sandpaper to polish the titanium-based alloy sample to the mirror surface, then scrub it with absorbent cotton dipped in absolute ethanol, ultrasonically clean it in acetone for 3 minutes, and finally blow it with hot air. dry to prepare polished and cleaned titanium-based alloy samples. The polished and cleaned titanium-based alloy sample (Ti-50Al) is used as the anode, and the graphite electrode is used as the counter electrode. The distance between the electrodes is 2.5cm. The constant voltage mode is used for anodic oxidation, and the anodic oxidation electrolyte used is 0.1molL -1 CeCl 3 ·7H 2 O and 0.5wt% ammonium fluoride in ethylene glycol solution, the voltage is set to 1V, the temperature is controlled at 25°C with a water bath, and after anodizing for 60min, the sample is taken out and rinsed with deionized water and then ultrasonically cleaned wi...

Embodiment 2

[0023] A method to improve the high-temperature oxidation resistance of titanium-based alloys. First, use 60-mesh iron sandpaper to polish the titanium-based alloy sample to the mirror surface, then scrub it with absorbent cotton dipped in absolute ethanol, ultrasonically clean it in acetone for 3 minutes, and finally blow it with hot air. dry to prepare polished and cleaned titanium-based alloy samples. The polished and cleaned titanium-based alloy sample (Ti-10Al) is used as the anode, and the graphite electrode is used as the counter electrode. The distance between the electrodes is 1cm. The constant voltage mode is used for anodic oxidation, and the anodic oxidation electrolyte used is 0.05molL -1 CeCl 3 ·7H 2 O and 0.1wt% ammonium fluoride in ethylene glycol solution, the voltage is set to 60V, and the temperature is controlled at 25°C by using a water bath. After anodizing for 5 minutes, the sample is taken out and rinsed with deionized water, and then ultrasonically c...

Embodiment 3

[0026] A method to improve the high-temperature oxidation resistance of titanium-based alloys. First, use 60-mesh iron sandpaper to polish the titanium-based alloy sample to the mirror surface, then scrub it with absorbent cotton dipped in absolute ethanol, ultrasonically clean it in acetone for 3 minutes, and finally blow it with hot air. dry to prepare polished and cleaned titanium-based alloy samples. The polished and cleaned titanium-based alloy sample (Ti-20Al) is used as the anode, and the graphite electrode is used as the counter electrode. The distance between the electrodes is 10cm. The constant voltage mode is used for anodic oxidation, and the anodic oxidation electrolyte used is 0.2molL -1 CeCl 3 ·7H 2 O and 10wt% ammonium fluoride in ethylene glycol solution, the voltage is set to 30V, the temperature is controlled at 25°C with a water bath, and after anodizing for 30 minutes, the sample is taken out and rinsed with deionized water, and then ultrasonically clean...

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Abstract

The invention discloses a method for improving high-temperature oxidation resistance of a titanium-based alloy. The method takes the titanium-based alloy as an anode, the high-temperature oxidation resistance of the titanium-based alloy is improved through an active element to modify an anode oxidation film, and the active element is cerium element. According to the method, the anodic oxidation film is modified by adding the active element, the high-temperature oxidation resistance effect can be achieved with lower anodic oxidation voltage and shorter anodic oxidation time compared to an electrolyte without the active element, the technical difficult problem that the titanium-based alloy is poor in high-temperature oxidation resistance is solved, the oxidation time is also shortened, and the oxidation voltage is reduced; due to the fact that the oxidation film is grown in situ, the binding force of the oxidation film is good with a substrate, the manufacturing process is simple, the cost is low, the operation is convenient, the efficiency is high, the implementation is easy to be realized, and the anti-oxidation property is good under the high-temperature oxidation of 1000 DEG C.

Description

technical field [0001] The invention belongs to the field of high-temperature oxidation resistance of metal materials, and in particular relates to a method for improving the high-temperature oxidation resistance of titanium-based alloys. Background technique [0002] Titanium-based alloys have the advantages of low density, high specific strength, good corrosion resistance and excellent high-temperature strength, so they have great prospects in aerospace industry, medical equipment, chemical industry and other fields that require high-temperature and lightweight materials. However, the insufficient high-temperature oxidation resistance of titanium-based alloys limits its development in practical applications, and the reason for the insufficient high-temperature oxidation resistance of titanium-based alloys is mainly that Al, which has no protective effect, will form in air exceeding 750 °C. 2 o 3 and TiO 2 mixed oxide layer. [0003] It has been decades since the researc...

Claims

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Application Information

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IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 伍廉奎夏俊捷曹华珍郑国渠侯广亚唐谊平
Owner ZHEJIANG UNIV OF TECH
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