Corrosion-resistant aluminum alloy sectional material

Abstract

The invention discloses a corrosion-resistant aluminum alloy sectional material and belongs to the technical field of metal material manufacturing. According to the corrosion-resistant aluminum alloysectional material, on the one hand, raw materials of an aluminum alloy substrate can be improved, proportioning and combination of different components are optimized, the strength and the corrosion resistance of the aluminum alloy substrate are enhanced in a whole, and the aluminum alloy substrate is further protected in a mode that a nano ceramic coating covers the surface of the aluminum alloysubstrate; and on the other hand, embedded repair rods are innovatively brought into the aluminum alloy substrate, part of internal stress can be eliminated while the strength of the aluminum alloy substrate is improved, moreover when the nano ceramic coating is corroded or damaged, repair actions of the embedded repair rods is triggered by means of a prone-to-corrosion part, repair magnetic ballsare actively attracted to a corroded position or a damaged position on the basis of a magnetic attraction function to perform repair, further corrosion or damage is avoided, the sectional material issuitable for self-repair under various corrosion conditions, the corrosion resistance of the aluminum alloy substrate is effectively improved, and the service life of the aluminum alloy substrate isprolonged.

Description

technical field [0001] The invention relates to the technical field of metal material manufacturing, and more specifically relates to a corrosion-resistant aluminum alloy profile. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. Because of its low density, relatively high strength, close to or exceeding high-quality steel, good plasticity, excellent electrical conductivity, thermal conductivity, corrosion resistance and other properties, it can be processed into various profiles and widely used in machinery manufacturing, transportation machinery, power Machinery and aviation industry, etc. [0003] When the surface of the aluminum alloy is exposed to the atmosphere, it will be covered with a thin layer of natural oxide film, but because the natural oxide film on the surface is easily...

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Problems solved by technology

[0006] 3. Crevice corrosion Crevice corrosion is a kind of localized corrosion

[0008] Therefore, it is difficult to improve the corrosion resistance only from the raw materials to be applicable to the corrosion phenomenon under different conditions, which seriously restricts the wide application of aluminum alloy profiles in different fields.

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