Wave-absorbing functional protecting coating on surface of aluminum alloy and preparation method thereof

A technology of aluminum alloy surface and protective coating, applied in the field of aluminum alloy, can solve problems such as personal safety and equipment stability impact, achieve great social and economic value, change the absorption intensity and absorption peak frequency range, and electromagnetic wave absorption frequency is wide. Effect
CN102553814BInactive Publication Date: 2014-03-12INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2014-03-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of aluminum alloys, in particular to a method for preparing a wave-absorbing functional protecting coating on the surface of an aluminum alloy and various coatings prepared by the method. The method comprises the following steps of: preparing a micro-arc oxidized ceramic layer on the surface of the aluminum alloy; and then compounding a wave-absorbing coating on the surface of the oxidized ceramic layer to prepare the aluminum alloy wave-absorbing functional coating with corrosion resistance and a wave-absorbing function, the ceramic layer with a compact microstructure is prepared by the method, and the corrosion resistance of the aluminum alloy is obviously improved. The wave-absorbing coating compounding technology has the effect of sealing the porous ceramic layer, so while the corrosion resistance of the ceramic layer is improved, the wave-absorbing function of the ceramic layer is achieved. In addition, the absorption strength and an absorption peak frequency interval are effectively changed by adjusting the type, the content and the electromagnetic parameters of a wave-absorbing agent and the thickness of a coating. The comprehensive coating prepared by the method has the characteristics of high corrosion resistance, firm surface bonding strength, wide electromagnetic wave-absorbing frequency range and the like, and can be widely applied to fields, such as aviation, spaceflight, military industry and electronic products.
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Description

Technical field:

[0001] The invention relates to the field of aluminum alloys, in particular to a method for preparing a wave-absorbing functional protective coating on the surface of an aluminum alloy and various coatings prepared by applying the method. Background technique:

[0002] Stealth technology has developed rapidly in developed countries and has been applied to advanced weapons and equipment, posing a great threat to my country's military security. As the primary high technology in the military field, it is listed as the basic element of "competitive strategy". In recent years, with the advent of new advanced detectors such as advanced infrared / ultraviolet detectors and millimeter-wave radars, and the urgent need to improve the effectiveness of integrated defense systems, more severe challenges have been posed to the original equipment's stealth technology. Furthermore, in recent years, the rapid increase of space electromagnetic waves has had a non-negligible imp...

Claims

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