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Method for preparing wear-resistant super-hydrophobic coating by electro-deposition method

A super-hydrophobic coating, electrodeposition technology, applied in the direction of electrolytic organic material coating, etc., can solve the problems of poor mechanical properties of rough structure, weak grafting, multi-level damage of coating, etc.

Pending Publication Date: 2020-11-27
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of superhydrophobic coatings prepared by electrodeposition methods are still difficult to overcome.
On the one hand, the grafting of low surface energy substances to the coating is not strong, and the impregnation method is used to adsorb on the surface of the coating, and after frictional damage, certain damage will occur; on the other hand, the rough structure is damaged, and the rough structure is often relatively fragile. The mechanical properties are poor. When subjected to external impact or mechanical friction, it is easy to be damaged. When the multi-level coating is damaged, the coating loses its corresponding functionality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In the pretreatment process of the substrate, the stainless steel substrate is cut to a size of 115mmX50mmX1mm, and the steel plate is polished step by step with 400-1200 mesh silicon carbide sandpaper. The polished steel plate was ultrasonically cleaned in a mixed solution of ethanol / acetone (volume ratio: 1 / 1) for 15 minutes, and then cleaned with a large amount of deionized water. Then put the steel plate into the prepared 7mol / L HCl solution for etching, take out the steel plate after etching for 1 hour, rinse it with a large amount of deionized water, and dry it in the atmosphere for later use. First, prepare 0.02mol / L ZnSO 4 , 0.1mol / L KCl and 0.0065mol / L dopamine hydrochloride (Dop) electrolyte, fully stirred until the solution appears clear. The electrodeposition process was tested using a double-electrode power supply. The treated carbon steel plate was used as the cathode, and a pure copper plate of the same size was used as the anode. During the electrodepos...

Embodiment 2

[0016] In the pretreatment process of the substrate, the stainless steel substrate is cut to a size of 115mmX50mmX1mm, and the steel plate is polished step by step with 400-1200 mesh silicon carbide sandpaper. The polished steel plate was ultrasonically cleaned in a mixed solution of ethanol / acetone (volume ratio: 1 / 1) for 15 minutes, and then cleaned with a large amount of deionized water. Then put the steel plate into the prepared 7mol / L HCl solution for etching, take out the steel plate after etching for 1 hour, rinse it with a large amount of deionized water, and dry it in the atmosphere for later use. First, prepare 0.02mol / L ZnSO 4 , 0.1mol / L KCl and 0.0065mol / L dopamine hydrochloride (Dop) electrolyte, fully stirred until the solution appears clear. The electrodeposition process was tested using a double-electrode power supply. The treated carbon steel plate was used as the cathode, and a pure copper plate of the same size was used as the anode. During the electrodepos...

Embodiment 3

[0018] In the pretreatment process of the substrate, the stainless steel substrate is cut to a size of 115mmX50mmX1mm, and the steel plate is polished step by step with 400-1200 mesh silicon carbide sandpaper. The polished steel plate was ultrasonically cleaned in a mixed solution of ethanol / acetone (volume ratio: 1 / 1) for 15 minutes, and then cleaned with a large amount of deionized water. Then put the steel plate into the prepared 7mol / L HCl solution for etching, take out the steel plate after etching for 1 hour, rinse it with a large amount of deionized water, and dry it in the atmosphere for later use. First, prepare 0.02mol / L ZnSO 4 , 0.1mol / LKCl electrolyte, fully stirred until the solution appears clear. The electrodeposition process was tested using a double-electrode power supply. The treated carbon steel plate was used as the cathode, and a pure copper plate of the same size was used as the anode. During the electrodeposition process, the water bath was heated and s...

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PUM

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Abstract

The invention provides a method for preparing a wear-resistant super-hydrophobic coating by an electro-deposition method. The method for preparing the wear-resistant super-hydrophobic coating by the electro-deposition method comprises the following steps of polishing a stainless steel substrate firstly, then preparing a zinc sulfate electrolyte, a potassium chloride electrolyte and a dopamine hydrochloride electrolyte with certain concentrations, sufficiently and uniformly stirring, and then taking the treated stainless steel substrate as a cathode, enabling a copper plate of the same size toserve as an anode, setting the voltage to be 10-30 V, conducting the deposition time for 10-60 minutes, and obtaining the final super-hydrophobic zinc / polydopamine / n-dodecanethiol coating through electro-deposition.

Description

technical field [0001] The invention relates to a super-hydrophobic coating, and the innovation point lies in a process method for preparing a wear-resistant super-hydrophobic coating by using an electrodeposition method to induce chemical crosslinking at the interface. Background technique [0002] Corrosion of metal materials has plagued people's production and life for many years. Metal corrosion will not only shorten the service life of materials, but also cause environmental pollution and pose a great safety hazard. Due to its unique advantages, superhydrophobic coatings are increasingly being used to solve the protection and anti-corrosion problems of coatings. The preparation methods of superhydrophobic surfaces are divided into two categories: one is to construct rough structures on materials with low surface energy, and the other is to construct rough structures first, and then achieve superhydrophobicity by grafting low surface energy substances. . However, the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22C25D9/02
CPCC25D3/22C25D9/02
Inventor 宋伟强刘箫华孙东泽
Owner HENAN UNIVERSITY OF TECHNOLOGY
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