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Preparation method of double protective film layers on pure titanium surface

A protective film and pure titanium technology, which is applied in the field of preparation of a double-layer protective film layer on the surface of pure titanium, can solve the problems of poor high temperature corrosion resistance, low hardness of titanium and titanium alloys, etc., to improve wear resistance and inhibit chemical activity. Effect

Active Publication Date: 2021-03-12
JIAMUSI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of low hardness and poor high-temperature corrosion resistance of existing titanium and titanium alloys, and provides a method for preparing a double-layer protective film on the surface of pure titanium

Method used

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  • Preparation method of double protective film layers on pure titanium surface
  • Preparation method of double protective film layers on pure titanium surface
  • Preparation method of double protective film layers on pure titanium surface

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Experimental program
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specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of a kind of pure titanium surface double protective film layer of this embodiment is specifically carried out according to the following steps:

[0024] 1. The preparation process of anodized film:

[0025] ①Pure titanium surface pretreatment: Grind the pure titanium surface, then polish it on a metallographic sample polishing machine with alumina polishing solution, and then clean it in an ultrasonic cleaning machine equipped with absolute ethanol for 2 to 3 minutes to obtain sample;

[0026] ② Etching treatment: immerse the sample in the etching acid solution at room temperature for 1 to 2 minutes, take it out, and then wash it with absolute ethanol for 1 to 3 times to obtain a pure titanium sample;

[0027] ③Anodizing process: pour the electrolyte into the stainless steel tank, use the pulse anodizing power supply, connect the stainless steel tank with the negative pole of the power supply as the cathode, and connect ...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step ①, 200 mesh, 400 mesh, 800 mesh and 1000 mesh alumina water sandpaper are used in sequence to polish the pure titanium surface. Others are the same as the first embodiment.

specific Embodiment approach 3

[0035] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the polishing treatment in step ① is to polish at 900-1000 r / min for 3-5 minutes. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to the technical field of material surface treatment, and particularly relates to a preparation method of double protective film layers on a pure titanium surface. The inventionaims to solve the problems of low hardness and poor high-temperature corrosion resistance of the existing titanium and titanium alloy. The method comprises the following steps: 1, preparing an anodicoxide film; and 2, preparing a sol-gel film. The method is used for pure titanium surface treatment.

Description

technical field [0001] The invention relates to the technical field of material surface treatment, in particular to a method for preparing a double-layer protective film on the surface of pure titanium. Background technique [0002] Titanium and titanium alloys are important structural materials in the national defense industry. They have good mechanical properties. Their specific gravity, strength and service temperature are between aluminum and steel, but they have better seawater corrosion resistance and corrosion resistance than aluminum and steel. Ultra-low temperature performance, and can be cut and welded in inert medium, widely used in the national economy. However, titanium and titanium alloys have some inherent defects. The Vickers hardness of pure titanium is only 150-200HV, and the hardness of titanium alloy generally does not exceed 350HV. It has low hardness, poor wear resistance, and is sensitive to adhesive wear. In the natural state of titanium and alloys,...

Claims

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Application Information

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IPC IPC(8): C25D11/26C23C18/12C23C28/04
CPCC25D11/26C23C18/1254C23C18/1204C23C28/042
Inventor 吕迎李俊刚黄金侠周国洁
Owner JIAMUSI UNIVERSITY