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Preparation method of titanium nitride/titanium dioxide nano-composite anti-corrosion coating

A titanium dioxide and nanocomposite technology, applied in coating, metal material coating process, gaseous chemical plating, etc., can solve the problem of polluted environment, thin film porosity, uniform thickness of corrosion-resistant layer, poor control accuracy of components, etc. problems, to achieve the effect of good process repeatability, improved metal corrosion resistance, and accurate film thickness

Inactive Publication Date: 2018-11-16
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some current surface modification technologies still have certain limitations, such as: the chemical conversion film has poor adhesion and is easy to fall off; the arc oxidation technology can form a ceramic layer protective layer, but the temperature of the electrolyte rises rapidly during the micro-arc oxidation process, which is easy to cause the film Porous; electrochemical plating pollutes the environment, etc.
Existing surface modification technologies are generally only suitable for the preparation of one or several types of corrosion-resistant coatings; and the thickness uniformity, component control accuracy, and compactness of the corrosion-resistant layer are poor; it is difficult to generate three-dimensional coatings for components with complex configurations. sex step overlay

Method used

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  • Preparation method of titanium nitride/titanium dioxide nano-composite anti-corrosion coating
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  • Preparation method of titanium nitride/titanium dioxide nano-composite anti-corrosion coating

Examples

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Embodiment 1

[0024] A magnesium alloy with a size of 50mm×50mm×0.5mm is used as the substrate, and the surface is coated with titanium nitride / titanium dioxide nanocomposite corrosion-resistant coating. As described in the summary of the invention, the preparation of the ALD working chamber, the preparation of the titanium nitride / titanium dioxide nano-composite anti-corrosion coating, the reduction step of the ALD working chamber and other steps are carried out, wherein oxygen is used to convert part of the titanium nitride into titanium dioxide by autoxidation. When the temperature is 250°C, the oxidation process is saturated after 20 minutes of oxygen passing time, and the total weight of the nanocomposite coating no longer increases at this time. After the preparation was completed, the thickness of the corrosion-resistant layer was measured by X-ray reflectivity measurement (XRR) and atomic force microscope (AFM), and the thickness of the corrosion-resistant layer was measured to be 20...

Embodiment 2

[0027] A magnesium alloy with a size of 50mm×50mm×0.5mm is used as the substrate, and the surface is coated with a 20nm titanium nitride / titanium dioxide nanocomposite corrosion-resistant coating. As described in the summary of the invention, the preparation of the ALD working chamber, the preparation of the titanium nitride / titanium dioxide nano-composite anti-corrosion coating, the reduction step of the ALD working chamber and other steps are carried out, wherein oxygen is used to convert part of the titanium nitride into titanium dioxide by autoxidation. The temperature is 300°C, and the oxidation process is saturated after the oxygen passing time is 10min, at which point the total weight of the nanocomposite coating no longer increases. After the preparation was completed, the thickness of the corrosion-resistant layer was measured by X-ray reflectivity measurement (XRR) and atomic force microscope (AFM), and the thickness of the corrosion-resistant layer was measured to be...

Embodiment 3

[0030]A magnesium alloy with a size of 50mm×50mm×0.5mm is used as the substrate, and the surface is coated with titanium nitride / titanium dioxide nanocomposite corrosion-resistant coating. As described in the summary of the invention, the preparation of the ALD working chamber, the preparation of the titanium nitride / titanium dioxide nano-composite anti-corrosion coating, the reduction step of the ALD working chamber and other steps are carried out, wherein oxygen is used to convert part of the titanium nitride into titanium dioxide by autoxidation. When the temperature is 150°C, the oxidation process is saturated after the oxygen passing time is 60 minutes, and the total weight of the nanocomposite coating no longer increases at this time. After the preparation was completed, the thickness of the corrosion-resistant layer was measured by X-ray reflectivity measurement (XRR) and atomic force microscope (AFM), and the thickness of the corrosion-resistant layer was measured to be...

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Abstract

The invention discloses a preparation method of a titanium nitride / titanium dioxide nano-composite anti-corrosion coating. The preparation method comprises the following steps of (1) ALD working cavity preparing; (2) titanium nitride / titanium dioxide nano-composite anti-corrosion coating preparing, specifically, a titanium nitride film is prepared, part of titanium nitride is converted into titanium dioxide through self-oxidation, and finally the titanium nitride / titanium dioxide nano-composite coating is obtained; and (3) ALD working cavity reducing. According to the titanium nitride / titaniumdioxide nano-composite anti-corrosion coating prepared through an atomic layer epitaxy technology, a nano coating with the precise stoichiometric ratio, the good covering property and the precise film thickness can be formed on the surfaces of any shapes (two-dimensional or three-dimensional), and the repeatable stability of the technology is good. Coating materials are poisonless and harmless toa human body and can improve the corrosion resistance of metals, especially active metals such as magnesium and zinc.

Description

technical field [0001] The invention belongs to surface modification treatment technology, in particular to the design and preparation of corrosion-resistant coatings for metal materials. Background technique [0002] Metal materials have good electrical conductivity, thermal conductivity, strength, toughness, wear resistance and other characteristics, and have been widely used in many fields. However, most metals have active reaction characteristics. When they are in ordinary atmosphere or in contact with corrosive media, chemical or electrochemical reactions will occur, resulting in corrosion, damage or destruction of the material, affecting the performance of the material, and in severe cases. It will cause accidents and cause a great waste of resources and energy. Therefore, it is necessary to do a good job in the anti-corrosion work of metal materials, to better exert the performance of metal materials, and to ensure their safety in use. In recent years, with the deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/455C23C16/34C23C16/40
Inventor 罗岚徐福民刘勇郭锐熊志华
Owner NANCHANG UNIV
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