Method for preparing super-hydrophobic coating on steel substrate by virtue of Fe-based nano composite brush electroplating

Abstract

The invention provides a method for preparing a super-hydrophobic coating on a steel substrate by virtue of Fe-based nano composite brush electroplating and belongs to methods for preparing super-hydrophobic coatings on steel substrates. According to a process for preparing a super-hydrophobic coating on the surface of a steel substrate by using nano composite brush electroplating iron, a nano composite brush electroplating iron process and coating blackening treatment are adopted to prepare the super-hydrophobic coating with a contact angle of more than 150 degrees and a roll angle of less than 3 degrees on the surface of the steel substrate. The method comprises the following steps: (1) finishing preparatory works; (2) carrying out a process flow of preparing a micro nano coarse structure on the steel surface by using the nano composite brush electroplating iron; (3) carrying out the process steps of electric purification, activation, bottom layer plating, nano Cu / Al2O3 composite coating plating and alkali liquor soaking, performing water flushing after each process step to prevent the plating solution from polluting the next process, and performing blackening treatment on the coating; and (4) finishing the coarse surface by using a low-surface-energy substance. The method, which is used for constructing a super-hydrophobic surface by performing brush electroplating of iron on the surface of a hard metal and then performing blackening treatment, has the advantages of light and portable equipment, simple process, low cost, strong coating bonding force and the like.

Description

Technical field [0001] The invention relates to a method for preparing a super-hydrophobic coating on a steel substrate, in particular to a method for preparing a super-hydrophobic coating on a steel substrate by Fe-based nano composite electric brush plating. Background technique [0002] The superhydrophobic surface has a large contact angle and a very small rolling angle, which has attracted extensive attention and in-depth research. Researchers have discovered through a large number of experiments that super-hydrophobic surfaces have excellent properties such as self-cleaning, anti-fog, anti-freezing, and anti-corrosion, which provide broad prospects for the application of super-hydrophobic surfaces in production and life. The preparation of super-hydrophobic surface is mainly to construct micro-nano composite protruding type features. There are two main methods for super-hydrophobic surface preparation: one is to directly prepare micro-nano rough structures on the surface of...

AI Technical Summary

Problems solved by technology

[0003] Most of the currently prepared superhydrophobic surfaces are constructed on soft substrate materials, and have poor stability, high cost, complicated preparation process, and high cost, which cannot be applied in large-scale industrial production.

The methods commonly used in laboratory research to prepare superhydrophobic include stencil printing, stencil extrusion, steam-induced separation, etching, deposition, etc. Due to the complexity of the process, none of them can be applied to industrial production on a large scale.