A kind of magnesium alloy superhydrophobic coating and its preparation method and application

Abstract

The invention is applicable to the technical field of functional materials, and provides a magnesium alloy superhydrophobic coating and its preparation method and application. The preparation method includes the following steps: after polishing the surface of the magnesium alloy with metallographic sandpaper and polishing paste , and then cleaned to obtain a polished magnesium alloy; using a cross-shaped path, laser processing the polished magnesium alloy, etching a grid structure, and then cleaning to obtain a laser processed magnesium alloy; The laser-processed magnesium alloy is chemically modified with ethanol solution of fluorosilane, cleaned, and then heat-treated to obtain the magnesium alloy super-hydrophobic coating. The preparation method provided by the present invention is simple, fast, and economical. On the one hand, magnesium alloy is used to obtain a grid-shaped rough structure under laser processing; on the other hand, fluorosilane is used to reduce the surface energy of magnesium alloy to construct a long-life super The hydrophobic surface makes the superhydrophobic magnesium alloy exhibit corrosion resistance and excellent self-cleaning effect.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a magnesium alloy superhydrophobic coating and a preparation method and application thereof. Background technique [0002] As the lightest metal material known, magnesium alloy has excellent properties such as high damping, good thermal conductivity, high specific stiffness and specific strength, good cutting performance, high recycling rate, and anti-electromagnetic interference. Therefore, magnesium alloy has broad application prospects and great practical value in aerospace, automobile industry, medical equipment, electronic communication and other fields, and has become a new type of pillar material. [0003] However, the electrode potential of magnesium alloy is low, and its chemical activity is high, so it is easy to be corroded in humid environment or saline solution, which is the main obstacle restricting the wide application of magnesium alloy. ...

AI Technical Summary

Problems solved by technology

[0004] At present, the superhydrophobic structure constructed on the metal surface by conventional modification solutions has a short lifespan and is easily destroyed by long-term immersion in a corrosive environment.

However, some of the currently reported superhydrophobic surface preparation methods require demanding equipment, and the operation is relatively complicated; some preparation time is too long

In addition, the superhydrophobic coating on the surface of some materials is particularly unstable and has poor wear resistance. After long-term contact with the outside world, the superhydrophobic performance is weakened.

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