Preparation method of aluminum alloy surface film

A technology of aluminum alloy surface and aluminum alloy, which is applied in metal material coating process, liquid chemical plating, coating, etc., can solve the problems of poor corrosion resistance and achieve improved corrosion resistance, improved corrosion resistance, and continuous stability binding effect

Active Publication Date: 2019-07-23
瑞上兴通信信号器材连云港有限公司
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  • Abstract
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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 preparation method of an aluminum alloy surface film, and belongs to the technical field of surface films. The aluminum alloy surface film is prepared by adding cerium, corrosion of the external corrosion atmosphere to the surface of a matrix material and permeation of corrosion liquid to a conversion film are effectively blocked or delayed, an aluminum alloy matrix is protected against corrosion, and the corrosion resistance of aluminum alloy is improved. As a silicon dioxide ceramic film is prepared on the surface of the aluminum alloy, the corrosion resistance ofthe aluminum alloy is improved, the chemical properties of silicon dioxide are stable, and the etching-resistant capacity is high; and sol-gel method equipment adopted for preparing the silicon dioxide ceramic film is simple, the sintering temperature is low, large workpieces can be coated, good repeatability is achieved, the grain diameter of coating components is controllable, dispersion of themolecular level among the components can be achieved, the surface of the aluminum alloy can be effectively coated with the silicon dioxide ceramic film, the aluminum alloy matrix can be effectively protected against corrosion, and therefore the use time of the aluminum alloy is prolonged.

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 inhibition; [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 stee...

Claims

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Application Information

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Patent Type & Authority Applications(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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