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An anticorrosion wear-resistant coating for an aluminium alloy surface and a preparing method thereof

An aluminum alloy surface, anti-corrosion and wear-resistant technology, applied in the direction of anti-corrosion coating, metal material coating process, coating, etc., can solve the problems of poor film stability and unsatisfactory use effect, and achieve excellent friction resistance and anti-corrosion performance Excellent and simple preparation process

Active Publication Date: 2016-03-30
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability of the film is poor, and the use effect is not very ideal

Method used

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  • An anticorrosion wear-resistant coating for an aluminium alloy surface and a preparing method thereof
  • An anticorrosion wear-resistant coating for an aluminium alloy surface and a preparing method thereof
  • An anticorrosion wear-resistant coating for an aluminium alloy surface and a preparing method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0029] In a typical embodiment, the preparation method of the aluminum alloy surface anticorrosion wear-resistant coating of the present invention can comprise:

[0030] Texturing the surface of the aluminum alloy substrate to form a textured layer mainly composed of micro-nano structures;

[0031] The surface of the aluminum alloy substrate is immersed in a solution containing hydrolysis products of more than one organosilicon compound, so as to self-assemble on the textured layer to form a monomolecular silane film.

[0032] Wherein, the "micro-nano structure" is a micro / nano-scale composite undulating morphology formed by a combination of micro / nano-scale protrusions and / or depressions distributed on the surface of the aluminum alloy substrate.

[0033] Preferably, the aluminum alloy substrate having the monomolecular silane film on the surface can also be heat treated.

[0034] As one of the preferred implementation manners, the aluminum alloy substrate can be treated by ...

Embodiment 1

[0046] Wash the aluminum alloy with acetone and deionized water for 10 minutes respectively; then soak it in 40% hydrochloric acid aqueous solution for texturing treatment, the soaking temperature is room temperature, and the soaking time is 30s. Figure 7a The textured surface with micro-nano structure is shown; then the aluminum alloy sheet is put into the hydrolyzed octadecyltriethoxysilane solution, the immersion temperature is room temperature, and the immersion time is 12h, followed by heat treatment, heat treatment The temperature is 80° C. to obtain an anti-corrosion and wear-resistant coating on the surface of the aluminum alloy.

[0047] Comparative Example 1 (Comparative Example 1):

[0048] This comparative example is a comparative example of Example 1.

[0049] In this comparative example, no texturing treatment was performed on the aluminum alloy substrate, only the surface was self-assembled with silane solution, the assembly temperature was room temperature, a...

Embodiment 2

[0059] Wash the aluminum alloy with acetone and deionized water for 10 minutes respectively; Figure 7b The immersion temperature of the textured surface with micro-nano structure shown is room temperature, and the immersion time is 120s; then the aluminum alloy sheet is put into the hydrolyzed dodecyltriethoxysilane solution, the immersion temperature is room temperature, and the immersion time is 120s. The time is 12 hours, and then heat treatment is performed, and the heat treatment temperature is 80° C. to obtain an anti-corrosion and wear-resistant coating on the surface of the aluminum alloy.

[0060] Comparative example 2 (comparative example 2):

[0061] This comparative example is a comparative example of Example 2.

[0062] In this comparative example, no texturing treatment was performed on the aluminum alloy substrate, only the surface was self-assembled with silane solution, the assembly temperature was room temperature, and the assembly time was 12 hours, foll...

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Abstract

The invention discloses an anticorrosion wear-resistant coating for an aluminium alloy surface and a preparing method thereof. The coating comprises a textured layer formed by micro-nano structures on the aluminium alloy surface, and a monomolecular silane membrane layer covering the textured layer and bonded with the textured layer. The preparing method includes texturing the surface of an aluminum alloy substrate to form the textured layer, dipping the surface of the aluminum alloy substrate into a solution containing hydrolysates of alkoxy silane and the like so as to perform self-assembly to form the monomolecular silane membrane, and preferentially subjecting the surface of the aluminum substrate to heat treatment. The coating is excellent in friction resistance, good in corrosion resistance, high in stability, simple in preparation process, good in repeatability, easily available in raw material and low in cost, has no limit on shapes of substrates, is suitable for surface treatment of aluminum alloys with large areas and has a good application prospect.

Description

technical field [0001] The invention specifically relates to an aluminum alloy anti-corrosion and wear-resistant coating and a preparation method thereof, belonging to the field of metal material corrosion and protection. Background technique [0002] Aluminum alloy has low density, high strength, excellent electrical and thermal conductivity, good plasticity and formability, and is easy to process. It is widely used in aerospace, military industry, construction, automobile, ship and other fields. However, aluminum alloys have low hardness, poor wear resistance, and poor corrosion resistance, which limit their applications. At present, the surface treatment of aluminum alloy mainly includes electroplating, chemical plating, thermal spraying and so on. With the rapid development of modern industry, the surface requirements for aluminum alloys are getting higher and higher, and some aluminum alloy surface treatment technologies that can meet special requirements with low cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/08C23C18/00
Inventor 赵文杰秦立光伍方曾志翔乌学东薛群基
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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