Corrosion-resistant self-assembled doped film layer on aluminum alloy surface and preparation method of corrosion-resistant self-assembled doped film layer

A technology of aluminum alloy surface and self-assembled film, which is applied in the direction of metal material coating process, coating, liquid chemical plating, etc., can solve the problem of low surface hardness, limited application range of aluminum alloy, poor wear resistance and corrosion resistance, etc. problems, achieve the effects of short film forming time, low corrosion current density, and low cost

Inactive Publication Date: 2015-05-20
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, in the actual application process, aluminum alloys have many problems such as low surface hardness, poor wear resistance and corrosion resistance, which largely limit the application range of aluminum alloys.

Method used

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  • Corrosion-resistant self-assembled doped film layer on aluminum alloy surface and preparation method of corrosion-resistant self-assembled doped film layer

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Experimental program
Comparison scheme
Effect test

Embodiment

[0014] (1) The aluminum alloy is first removed by NaOH solution with a concentration of 40 g / L to remove the aluminum-clad layer on the surface; then it is polished to smooth with 600#, 1000# and 1200# sandpaper in turn, and cleaned with analytical pure acetone and ultrasonic waves for 15 minutes; then Use a NaOH solution with a concentration of 4 mol / L to wash with alkali at 25°C for 1 minute, and finally wash with deionized water for 3 times, and dry it for use.

[0015] (2) Prepare anhydrous ethanol and bis(γ-triethoxysilylpropyl)tetrasulfide at a volume ratio of 85:15 to make a mixed solution with a total volume of 100 mL, and wait for the solution to age for 5 h to stabilize , add 15mL polyethylene glycol 200, ultrasonically shake for 90 min, and add 300 mg TiO 2 fine particles to disperse them evenly, and finally add analytically pure acetic acid dropwise to adjust the pH value of the solution to 6 for later use.

[0016] (3) Immerse the ready-to-use aluminum alloy trea...

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Abstract

The invention discloses a corrosion-resistant self-assembled doped film layer on an aluminum alloy surface and a preparation method of the corrosion-resistant self-assembled doped film layer. The corrosion-resistant self-assembled doped film layer is composed of a self-assembled film and particles. The preparation method comprises the steps of firstly, carrying out pretreatment, namely grinding, washing, oil removal and the like on an aluminum alloy substrate; then, preparing a self-assembled doped solution; self-assembling the pretreated aluminum alloy to form a film; and taking out the film, drying and curing to obtain the corrosion-resistant self-assembled doped film layer on the aluminum alloy surface. The preparation method is low in cost, simple in preparation process and short in film formation time; the prepared self-assembled doped film is high in resistance and low in corrosion current density; and the film layer is uniform and level in surface, good in binding force on the aluminum alloy substrate, capable of favorably improving the corrosion resistance of the aluminum alloy surface and incapable of polluting the environment and equipment.

Description

technical field [0001] The invention belongs to the field of electrochemical corrosion on the surface of metal materials, in particular to a doped TiO with corrosion resistance function on the surface of aluminum alloy 2 Microparticle self-assembled film layer and its preparation method. Background technique [0002] Aluminum and aluminum alloys are widely used in the chemical industry, aerospace industry, automobile manufacturing industry, food industry, electronics, and instrumentation industries due to their advantages such as high strength, low density, strong electrical and thermal conductivity, excellent mechanical properties, and good processability. And marine shipbuilding industry and other fields. However, in the actual application process, aluminum alloys have many problems such as low surface hardness, poor wear resistance and corrosion resistance, which largely limit the application range of aluminum alloys. Aluminum alloy composition and heat treatment can gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/00
CPCC23C18/54
Inventor 温玉清郭荣蒙术定尚伟王旭峰
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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