Preparation of super-hydrophobic surface composite film and application of super-hydrophobic surface composite film in metal corrosion protection

A super-hydrophobic surface and metal corrosion technology, which is applied to the surface coating liquid device, pretreatment surface, anti-corrosion coating, etc., can solve the problems of hindering the diffusion of corrosive media, insufficient wear resistance, etc., to slow down the particle transmission rate, High conductivity, anti-corrosion effect

Pending Publication Date: 2020-12-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface composite film overcomes the disadvantage of insufficient wear resistance of the traditional superhydrophobic film, and can effectively prevent the diffusion of corrosive media to the metal substrate, greatly improving the corrosion resistance of the composite film, and the process is simple to operate, which is conducive to industrial application

Method used

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  • Preparation of super-hydrophobic surface composite film and application of super-hydrophobic surface composite film in metal corrosion protection
  • Preparation of super-hydrophobic surface composite film and application of super-hydrophobic surface composite film in metal corrosion protection
  • Preparation of super-hydrophobic surface composite film and application of super-hydrophobic surface composite film in metal corrosion protection

Examples

Experimental program
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Effect test

Embodiment 1

[0057] The size of the aluminum alloy is cut into 10mm×10mm×1mm, and it is polished step by step with 800#, 1000#, 1500#, 2000# water-grinding sandpaper, and then ultrasonically degreased with acetone and ethanol for 10 minutes respectively; the metal sample is acid-etched, Etch at room temperature for 6 minutes, rinse with deionized water, and boil in boiling water for 15 minutes, take it out and dry it, and dry it at 80°C for 1 hour for use. Prepare 5% concentration containing SiO 2 The γ-GPS silane solution of nanoparticles, wherein γ-GPS / water / ethanol is 5 / 15 / 80 (v / v / v), the pH is adjusted to 4.5 with acetic acid, and SiO 2 Nanoparticles (concentration: 50mg / mL) were ultrasonically hydrolyzed at 35°C for 2h, and used as the film-forming solution in the first step. Prepare a 5% concentration of FAS perfluorosilane solution, mix MXene with the above silane solution, and stir evenly to obtain a MXene / FAS mixed solution. The concentration of MXene is 0.8 mg / mL, adjust the pH ...

Embodiment 2

[0059] First prepare a 5% concentration of FAS perfluorosilane solution, mix MXene with the above silane solution, and stir evenly to obtain a mixed solution of MXene / FAS. The concentration of MXene is 0.8 mg / mL, adjust the pH to 4.5 with acetic acid, and ultrasonically hydrolyze at 35 °C 1-2h, the obtained MXene / FAS hydrolyzate. The size of the aluminum alloy is cut into 10mm×10mm×1mm, and it is polished step by step with 800#, 1000#, 1500#, 2000# water-grinding sandpaper, and then ultrasonically degreased with acetone and ethanol for 10 minutes respectively; the metal sample is acid-etched , etched at room temperature for 6 minutes, rinsed with deionized water, and boiled in boiling water for 15 minutes, taken out and dried at 80°C for 1 hour, and then the solution prepared above was spin-coated on the surface of the pretreated aluminum alloy to form a film. The rotation speed is 3000rmp, the time is 30s, and the continuous operation is performed twice, and then put into a 1...

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Abstract

The invention belongs to the field of metal corrosion protection, and particularly relates to preparation of an MXene/fluorosilane (FAS) super-hydrophobic surface composite film and application of theMXene/FAS super-hydrophobic surface composite film in metal corrosion protection. The application method comprises the following steps: pretreating the surface of a metal sample, modifying SiO2 nanoparticles with gamma-GPS silane, preparing dispersion liquid, preparing an MXene/FAS mixed solution, sequentially spin-coating the surface of the pretreated metal sample with the two dispersion liquidsto form a film, drying the spin-coated metal sample at room temperature, and then conducting curing in a drying oven to form the film. The MXene/FAS super-hydrophobic composite film surface protection technology is adopted, so that the composite film has excellent super-hydrophobic self-cleaning performance and corrosion resistance, and the durable cleaning and corrosion resistance of the surfaceof the metal material can be remarkably improved. In addition, the protective film prepared by the invention is simple to operate and meets the requirement of environmental protection. Doping of MXene can effectively hinder diffusion of a corrosive medium, and the corrosion resistance of the composite film is improved.

Description

technical field [0001] The invention belongs to the field of metal corrosion protection, in particular to the preparation of a MXene / fluorosilane (FAS) superhydrophobic surface composite film and its application in metal corrosion protection. Background technique [0002] Metal materials play a vital role in human production and life, but metal corrosion has caused a great waste of metal materials. Taking aluminum alloy as an example, it has excellent physical and mechanical properties: low density, good electromagnetic properties, high strength-to-weight ratio, etc., which makes aluminum alloys fully used in various industries such as aerospace and automobiles. However, its poor corrosion resistance limits its wider application. Most metal corrosion occurs when the metal substrate is in contact with water, oxygen or other corrosive environments. If the contact is reduced or the corrosive environment is completely isolated, the tendency of corrosion will be greatly reduced....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D1/00C09D5/00C09D5/24B05D7/24B05D7/14B05D3/10B05D3/02
CPCB05D3/0254B05D3/102B05D7/14B05D7/24C09D1/00C09D5/00C09D5/08C09D5/24
Inventor 曹美文聂焱李玉琪
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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