A kind of preparation method of aluminum alloy surface film

A technology of aluminum alloy surface and aluminum alloy, which is applied in the direction of metal material coating process, liquid chemical plating, coating, etc., can solve the problems of poor corrosion resistance, achieve improved corrosion resistance, high reactivity, and good stability Effect

Active Publication Date: 2021-12-07
瑞上兴通信信号器材连云港有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0011] The technical problem to be solved by the present invention: Aiming at the problem of poor corrosion resistance of the existing aluminum alloy surface film, a preparation method of the aluminum alloy surface film is provided

Method used

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Embodiment Construction

[0039]Take a piece of aluminum alloy with a specification of 100mm×50mm×50mm, and polish it with 600-2000 mesh water-grinding sandpaper until the surface is smooth, and then weigh 10-15 parts of the polished aluminum alloy in parts by weight. , 40-50 parts of acetone, 40-50 parts of sodium hydroxide solution with a mass concentration of 1%, 40-50 parts of nitric acid with a mass concentration of 30%, put the polished aluminum alloy in acetone for 3-5 minutes, and then use Wash with absolute ethanol for 3 to 5 times and deionized water for 3 to 5 times to obtain the cleaned aluminum alloy, place the cleaned aluminum alloy in sodium hydroxide solution, and heat it in a water bath to 50 to 60°C for etching treatment for 3 ~5min, get the etched aluminum alloy, soak the etched aluminum alloy in nitric acid at room temperature for 1~2min for light treatment, get the light treated aluminum alloy, first use anhydrous ethanol to ultrasonicate the light treated aluminum alloy Wash for 3...

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Abstract

The invention relates to a method for preparing an aluminum alloy surface film, and belongs to the technical field of surface films. The invention prepares the aluminum alloy surface film by adding cerium element, thereby effectively preventing or delaying the erosion of the surface of the base material by the external corrosive atmosphere and the penetration of the corrosive liquid into the conversion film, thereby protecting the aluminum alloy base from corrosion and improving the performance of the aluminum alloy. corrosion resistance; the present invention improves the corrosion resistance of the aluminum alloy by preparing a silicon dioxide ceramic film on the surface of the aluminum alloy, the chemical property of the silicon dioxide is stable, and the corrosion resistance is strong. The sol-gel method has simple equipment, low sintering temperature, can coat large parts, and has good repeatability. The particle size of the coating components can be controlled, and it can also achieve molecular level dispersion between components. The alloy surface can effectively protect the aluminum alloy substrate from corrosion, thereby prolonging the service life of the aluminum alloy.

Description

technical field [0001] The invention relates to a method for preparing an aluminum alloy surface film, and belongs to the technical field of surface films. Background technique [0002] According to the current related research, the prevention of corrosion of metal materials is mainly through the following mechanisms: [0003] (1) cathodic protection; [0004] (2) Anode passivation; [0005] (3) Electrolytic suppression; [0006] (4) Corrosion inhibitor. [0007] Cathodic protection is to apply an external current to the surface of the corroded metal material, and the protected metal material becomes a cathode, so that the electron migration of metal corrosion is inhibited, and the occurrence of corrosion is avoided or weakened. For a long time, zinc, aluminum, and magnesium alloys have often been used as anodes, which can form a favorable oxide layer on the metal surface by means of electrochemical potential to provide cathodic protection for metal materials such as ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/56C23C18/12
CPCC23C18/1212C23C22/56C23C2222/20
Inventor 谭春容
Owner 瑞上兴通信信号器材连云港有限公司
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