Preparation method of super-hydrophobic magnesium alloy

Abstract

The invention discloses a preparation method of a super-hydrophobic magnesium alloy. The preparation method specifically comprises the steps that laser marking is carried out on an original magnesium alloy matrix subjected to surface pretreatment to obtain a marked magnesium alloy matrix, specifically, the marked magnesium alloy matrix has a convex hull-shaped micron structure; ultrasonic cleaning and drying are carried out on the marked magnesium alloy matrix; at the room temperature, a cobalt metal plate serving as an anode and the marked magnesium alloy matrix serving as a cathode are immersed into a Co2+ electroplating solution for depositing to obtain a to-be-modified magnesium alloy matrix, specifically, the to-be-modified magnesium alloy matrix with the convex hull-shaped micron structure reserved further has a multi-stage a cicular micro-nano-scale structure; chemical modification is carried out on the to-be-modified magnesium alloy matrix; and the super-hydrophobic magnesium alloy matrix is of a graded rough structure in which the convex hull-shaped micron structure and the a cicular nano structure are reserved. According to the preparation method of the super-hydrophobic magnesium alloy, the stable super-hydrophobic magnesium alloy surface is prepared, test parameters are controllable, the preparation process is environmentally friendly, and wide application prospects are achieved.

Description

Technical field: [0001] The invention relates to the technical field of magnesium alloy surface treatment and modification, in particular to a preparation method of a superhydrophobic magnesium alloy. Background technique: [0002] Magnesium alloy has the advantages of low density, high specific strength, large specific elastic modulus, good heat dissipation, good shock absorption, good damping and cutting performance, etc. It is widely used in the manufacture of aerospace, new energy vehicles, hydrogen storage devices, medical materials, etc. Wide range of applications. But at the same time, magnesium has high chemical activity, its equilibrium potential is very low, and it is prone to galvanic corrosion when it contacts with different metals, and acts as an anode. At room temperature, the surface of the magnesium alloy will react with oxygen in the air to form a magnesium oxide film, but because the magnesium oxide film is relatively loose, the corrosion resistance is poo...

AI Technical Summary

Problems solved by technology

The preparation of superhydrophobic surface is inseparable from the structure of surface micro-nano structure. Generally speaking, the preparation of superhydrophobic surface of magnesium alloy requires two steps: one is to construct micro-nano-scale rough structure on the solid surface; Free energy substances; existing processes often require harsh equipment, expensive reagents, and a long cycle. There is still a long way to go before the super-hydrophobic surface is applied to the industrial magnesium alloy anti-corrosion field

For example, CN102703886A discloses a method for preparing a magnesium alloy superhydrophobic surface. It undergoes surface pickling and electroless silver plating to obtain a rough surface structure, and then undergoes self-assembled surface modification to obtain a superhydrophobic surface on which water droplets are very easy to roll. However, its In the process of chemical silver plating, the silver layer grows layer by layer, and it is easy to fall off, and the stability is poor, which seriously restricts the application in actual production.

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