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

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...

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