Preparation method of super-hydrophobic film on surface of steel substrate

A steel substrate, super-hydrophobic technology, applied in coating, metal material coating process and other directions, can solve the problems of low wear resistance, environmental pollution, complex process, etc., to achieve good wear resistance and corrosion resistance, The effect of accelerating etching speed and simple preparation process
CN110359044AActive Publication Date: 2019-10-22CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2019-10-22

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Abstract

The invention discloses a preparation method of a super-hydrophobic film on the surface of a steel substrate. The method includes the steps that the steel substrate is ground and subjected to deoilingpretreatment, and oil and oxides on the surface of the steel substrate are removed until the surface is smooth; the completely-treated steel substrate is soaked in a iron fluoride solution, and a rough steel substrate surface is obtained through the combination of chemical etching and electrochemical etching; and the etched steel substrate is soaked in an ethanol solution of stearic acid and perfluorooctyl trimethoxysilane to be modified for a period of time, after the steel substrate is dried at constant temperature, a modified super-hydrophobic nanosilicon dioxide solution is sprayed to thesurface of the steel substrate, and after heat treatment is completed, the super-hydrophobic composite film is obtained. The process is simple, environmentally friendly, safe and reliable, and a hydrophobic coating is high in hydrophobicity, further has the beneficial effects of being high in adsorptivity, good in abrasion resistance, high in corrosion resistance and the like, and is suitable forlarge-scale industrial production.
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Description

technical field

[0001] The invention relates to the technical field of metal surface treatment, in particular to a method for preparing a super-hydrophobic film on the surface of a steel substrate. Background technique

[0002] Steel is widely used in military industry and civilian industry, but its surface is easily corroded, which restricts the application and promotion of steel products. Therefore, it is very necessary to improve the corrosion resistance of the steel substrate surface.

[0003] As one of the new functional materials, superhydrophobic material refers to the surface with water contact angle greater than 150° and rolling angle less than 10° on the surface of the material. It exists widely in nature, such as lotus leaves, taro leaves, butterfly wings, rice leaves, etc. Due to its unique properties such as self-cleaning, anti-icing, corrosion resistance and drag reduction, super-hydrophobic coatings have always been a hot topic of research by researchers. ...

Claims

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