Protection method for removing corrosion on surface of aluminum alloy

A technology for aluminum alloy surface and corrosion protection, which is applied to the device for coating liquid on the surface, metal material coating process, coating and other directions, which can solve the problems of secondary corrosion, difficult to completely remove the rust layer, and high labor intensity. Effectively remove and eliminate adverse effects

CN110273160AInactive Publication Date: 2019-09-24AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-09-24
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to a protection method for removing corrosion on the surface of an aluminum alloy. The protection method comprises a removal step of floating rust on corroded parts on the surface of the aluminum alloy, the removal step deep corrosion products on the surface of the aluminum alloy, an oxidation step on the surface of the aluminum alloy, and a protection step on the surface of the aluminum alloy after corrosion removing. According to the protection method, the corrosion products on the surface of the aluminum alloy are removed by adopting an aluminum alloy de-corrosion product paste, not only the corrosion products on the surface of the aluminum alloy can be quickly and effectively removed, but also the adverse effect of a chemical reagent on uncorroded parts on the surface of the aluminum alloy in the rust removing process is also eliminated; then the surface of the aluminum alloy is oxidized by adopting an aluminum alloy surface oxidation paste, so that a protective film with good binding force to an organic film layer and with a certain corrosion resistance is generated; and finally, the final purpose of protection is achieved by coating a corrosion inhibitor, an organic coating or the like.
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Description

technical field

[0001] The invention relates to the technical field of corrosion removal of aluminum alloy materials, in particular to a corrosion protection method for aluminum alloy surfaces. Background technique

[0002] Aluminum alloy materials have a series of outstanding advantages such as high strength, low specific gravity and good formability, and have been widely used in aerospace, construction, mechanical automation and other fields. However, during use, with the failure of the anodized surface or surface protective coating, the aluminum alloy surface is extremely vulnerable to corrosion from the atmospheric environment, which causes serious safety hazards in the equipment. Therefore, it is necessary to remove the corrosion products on the surface of the aluminum alloy in a timely manner and protect the cleaned parts to ensure the safety and service life of the equipment.

[0003] The methods of manual derusting, chemical solution derusting and mechanical shot bl...

Examples

Embodiment 1

[0024] Provided is a method for corrosion protection on an aluminum alloy surface, comprising the following steps:

[0025] Step 1. Removal of floating rust on the corroded parts of the aluminum alloy surface

[0026] Mechanically polish the corroded parts of the aluminum alloy surface until the surface reveals a metallic luster, and use an organic solvent to clean the polished surface;

[0027] Step 2. Removal of deep corrosion products on the aluminum alloy surface

[0028] Apply aluminum alloy anti-corrosion product paste to the surface of aluminum alloy after mechanical polishing, and keep it for 0.5h~2h after application; when the anti-corrosion product paste is dry, clean the coated area to remove the attachment on the aluminum alloy surface;

[0029] Step 3, aluminum alloy surface oxidation

[0030] Apply an aluminum alloy surface oxide paste to the aluminum alloy surface coated with aluminum alloy corrosion product paste, and keep the oxide paste for 0.5h to 2h after...

Embodiment 2

[0037] Provided is a method for corrosion protection on an aluminum alloy surface, comprising the following steps:

[0038] Step 1. Removal of floating rust on the corroded parts of the aluminum alloy surface

[0039] Mechanically polish the corroded parts of the aluminum alloy surface until the surface reveals a metallic luster, and use an organic solvent to clean the polished surface;

[0040] Step 2. Removal of deep corrosion products on the aluminum alloy surface

[0041] Apply aluminum alloy anti-corrosion product paste to the surface of aluminum alloy after mechanical polishing, and keep it for 0.5h~2h after application; when the anti-corrosion product paste is dry, clean the coated area to remove the attachment on the aluminum alloy surface;

[0042] Step 3, aluminum alloy surface oxidation

[0043] Apply an aluminum alloy surface oxide paste to the aluminum alloy surface coated with aluminum alloy corrosion product paste, and keep the oxide paste for 0.5h to 2h after...

Embodiment 3

[0050] Including the following steps:

[0051] Step 1. Removal of floating rust on the corroded parts of the aluminum alloy surface

[0052] Use tools such as sandpaper, bristle brushes or grinding wheels to mechanically polish the corroded parts of the aluminum alloy surface until the surface reveals a metallic luster, and use cotton yarn or cotton cloth dipped in organic solvents such as gasoline, acetone or solvent-based cleaning agents to polish the polished surface After cleaning, dry the treated surface naturally in the air or dry it with clean compressed air;

[0053] Step 2. Removal of deep corrosion products on the aluminum alloy surface

[0054] Stir the aluminum alloy anti-corrosion product paste to a uniform paste, apply it to the mechanically polished aluminum alloy surface with a brush or scraper, and keep it for 0.5h~2h after coating; when the anti-corrosion product paste is dry, use a brush, cotton cloth or a scraper to remove the residual de-corrosion produc...