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Preparation method of corrosion-resistant and wear-resistant modified ceramic coating on aluminum alloy surface

A technology of aluminum alloy surface and ceramic coating, which is applied in the direction of metal material coating process, coating, heating inorganic powder coating, etc., can solve the problems of coating cracks and affecting coating bonding force, etc., to improve bonding force, Combines solid, well-performing effects

Inactive Publication Date: 2020-09-11
沈永成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum alloy composite ceramic coating in the above-mentioned patent has the following disadvantages: the difference in thermal expansion coefficient between the coating and the substrate can easily cause cracks in the coating when it is cooled to room temperature, which affects the adhesion of the coating

Method used

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  • Preparation method of corrosion-resistant and wear-resistant modified ceramic coating on aluminum alloy surface
  • Preparation method of corrosion-resistant and wear-resistant modified ceramic coating on aluminum alloy surface
  • Preparation method of corrosion-resistant and wear-resistant modified ceramic coating on aluminum alloy surface

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for preparing an anti-corrosion and wear-resistant modified ceramic coating on the surface of an aluminum alloy, such as figure 1 shown, including the following steps:

[0035] S1: Dry and grind ceramic materials, additives, and composite additives, pass through a 200-mesh sieve, and set aside;

[0036] S2: processing the aluminum alloy components for use;

[0037] S3: Pour the dry powdered ceramic powder into the blender, add deionized water, and stir for 5 minutes at 80°C, add the additives into the blender, and continue stirring for 8 minutes to mix, and add composite additives during the stirring to obtain a ceramic coating Binder;

[0038] S4: Use spraying equipment to spray the ceramic coating base material on the surface of the aluminum alloy component, leveling;

[0039] S5: After drying at room temperature to form a film, put the base material into a baking oven for sintering, control the heating rate to 520°C at a rate of 10°C / s, keep it warm for 2...

Embodiment 2

[0054] A method for preparing an anti-corrosion and wear-resistant modified ceramic coating on the surface of an aluminum alloy, such as figure 2 shown, including the following steps:

[0055] S1: Dry and grind ceramic materials, additives, and composite additives, pass through a 200-mesh sieve, and set aside;

[0056] S2: processing the aluminum alloy components for use;

[0057] S3: Pour the dry powdered ceramic powder into the blender, add deionized water, and stir for 5 minutes at 80°C, add the additives into the blender, and continue stirring for 8 minutes to mix, and add composite additives during the stirring to obtain a ceramic coating Binder;

[0058] S4: Dip the aluminum alloy element into the ceramic coating base material and take it out;

[0059] S5: After drying at room temperature to form a film, put the base material into a baking oven for sintering, control the heating rate to 520°C at a rate of 10°C / s, keep it warm for 2 hours, and cool naturally.

[0060...

Embodiment 3

[0072] A method for preparing an anti-corrosion and wear-resistant modified ceramic coating on the surface of an aluminum alloy, such as image 3 shown, including the following steps:

[0073] S1: Dry and grind ceramic materials, additives, and composite additives, pass through a 200-mesh sieve, and set aside;

[0074] S2: processing the aluminum alloy components for use;

[0075] S3: Pour the dry powdered ceramic powder into the blender, add deionized water, and stir for 5 minutes at 80°C, add the additives into the blender, and continue stirring for 8 minutes to mix, and add composite additives during the stirring to obtain a ceramic coating Binder;

[0076] S4: Brushing the ceramic coating base material on the surface of the aluminum alloy element with a brush;

[0077] S5: After drying at room temperature to form a film, put the base material into a baking oven for sintering, control the heating rate to 520°C at a rate of 10°C / s, keep it warm for 2 hours, and cool natur...

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Abstract

The invention discloses a preparation method of a corrosion-resistant and wear-resistant modified ceramic coating on aluminum alloy surface, relates to the technical field of aluminum alloy surface treatment, and aims to solve the problem of cracks in the coating cooling to room temperature. The preparation method particularly comprises the steps that ceramic materials, additives and composite additives are dried, ground and passed through a 200-mesh sieve for use; aluminum alloy components are processed for use; and dry ceramic powder is poured into a mixer, and deionized water is added. According to the preparation method, the deionized water is used as carrier liquid, the additives are used as binders, and various metal inorganic oxides are added, fully stirred and milled to obtain a uniformly dispersed ceramic coating. The composite additives, aluminum powder and the like are added and further oxidized in the heat treatment process, and can produce volume expansion to compensate for the volume shrinkage of the ceramic coating during a sintering process. The coating can be densified to have a toughening effect, and the adhesion of the coating on the aluminum alloy surface is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy surface treatment, in particular to a method for preparing an anti-corrosion and wear-resistant modified ceramic coating on the surface of an aluminum alloy. Background technique [0002] Aluminum alloy is widely used in various industries because of its high specific stiffness, low density, and excellent processing performance. The continuous development of aerospace, military industry, automobile industry, shipbuilding industry, communication engineering and other industries has a great impact on the surface of parts. The requirements are getting higher and higher. In the process of aluminum alloy manufacturing, due to the addition of various elements to pursue high mechanical properties and other comprehensive properties, the internal chemical composition and structure of aluminum alloys are not uniform. In addition, heat treatment and processing The existence of residual stress makes al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08
CPCC23C24/085
Inventor 沈永成
Owner 沈永成
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