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Ceramic membrane preparation method controlling hot salt corrosion fatigue of titanium alloy

A corrosion fatigue, titanium alloy technology, applied in anodizing, electrolytic coatings, surface reaction electrolytic coatings, etc., can solve the problems of surface damage, accelerated crack formation and corrosion, reduced improvement effect, etc., to improve resistance to hot salt corrosion The effect of fatigue performance

Active Publication Date: 2020-11-20
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface will also be damaged, which will accelerate the formation of cracks and corrosion, which will reduce the improvement effect.

Method used

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  • Ceramic membrane preparation method controlling hot salt corrosion fatigue of titanium alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The TC17 titanium alloy is processed into a rotating bending fatigue sample according to the standard (HB5153-1996 metal high temperature rotating bending fatigue test method), and the sample is ultrasonically cleaned with detergent powder, water, and absolute ethanol to remove rust spots and oil stains on the surface of the sample Let it dry with a hair dryer. The use of decontamination powder is to use the principle of physical grinding to quickly remove rust spots on the metal surface and metal discoloration and spots caused by oxidation. Cleaning with water is to avoid corrosion of the sample caused by the residual detergent powder. Cleaning with absolute ethanol is to remove oil, dirt and other residues on the surface of the sample. Due to the different effects of each cleaning, the residues on the surface of the sample are not the same, and only one cleaning method can not clean the surface of the sample. Absolute ethanol is of analytical purity, and it only nee...

Embodiment 2

[0025] According to the standard (HB5153-1996 Metal High Temperature Rotary Bending Fatigue Test Method), the TC17 titanium alloy is processed into a rotating bending fatigue sample, and the sample is ultrasonically cleaned with detergent powder, water, and absolute ethanol in turn, and then dried with a hair dryer. Then, TiO was prepared on the surface of titanium alloy by pulsed plasma conversion film technology. 2 Ceramic film layer, the specific test parameters and steps are as follows: first take an appropriate amount of distilled water in a beaker, and then add the weighed medicines (sodium silicate 25g / L, sodium hexametaphosphate 10g / L, sodium hydroxide 0.5g / L, Sodium tetraborate 4g / L), stir with glass rod to make it dissolve, after all medicines are dissolved, get distilled water again and adjust to desired concentration. Pour the prepared electrolyte into the stainless steel tank, fix the sample with titanium wire, hang it in the electrolyte, connect the sample to the a...

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Abstract

The invention relates to a ceramic membrane preparation method controlling hot salt corrosion fatigue of titanium alloy. It is proposed that a pulsed plasma conversion coating technology is used to prepare a TiO2 ceramic coating on the surface of the titanium alloy, and a hot salt corrosion fatigue test is carried out in an environment simulating compressor blade working conditions. The TiO2 ceramic coating effectively improves the hot salt corrosion fatigue resistance of the titanium alloy.

Description

technical field [0001] The invention relates to the field of surface treatment of metal materials, in particular to a surface treatment method for improving the anti-hot salt corrosion fatigue performance of titanium alloys. Background technique [0002] Due to its excellent comprehensive mechanical properties, titanium alloy has become the main material for the blades and discs of aero-engine compressors, but the working environment of the blades, the main rotating parts of the engine, is extremely complex, and it is in the working environment of high temperature, high pressure and multiple factors affected by alternating loads. middle. For aircraft serving in marine environments, aeroengine compressor blades are also subject to salt spray erosion, so hot salt stress corrosion and corrosion fatigue caused by the combination of heat-force-salt has become one of the main failure modes of aeroengine compressor titanium alloy blades . Therefore, it is very important to develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
CPCC25D11/34C25D11/024
Inventor 刘道新史海兰潘一帆奥妮马阿敏刘珍张晓化何光宇
Owner NORTHWESTERN POLYTECHNICAL UNIV