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Method for preparing corrosion-resisting and self-cleaning coating

A self-cleaning coating, corrosion-resistant technology, applied in the direction of coating, metal material coating process, solid-state chemical plating, etc., can solve problems such as corrosion resistance research, achieve low equipment requirements, improve surface morphology, improve The effect of superhydrophobicity

Active Publication Date: 2012-03-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method is only applicable to commonly used metal substrates, and the applicant has not conducted research on the corrosion resistance of this self-cleaning functional surface

Method used

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  • Method for preparing corrosion-resisting and self-cleaning coating
  • Method for preparing corrosion-resisting and self-cleaning coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Clean the Hastelloy substrate used in the experiment with an ultrasonic cleaner and air dry it. The cleaning steps are as follows: put the Hastelloy alloy substrate into acetone, ethanol and deionized water for ultrasonic cleaning for 10 minutes respectively; 2 CO 3 25g / L, Na 3 PO 4 25g / L) at 80°C for 4 hours, then rinsed with deionized water and ultrasonically washed to completely remove the grease and pollutants on the surface.

[0034] 2. Preparation of TiO 2 sol 1, put the Hastelloy alloy base material into the sol 1 for dipping and pulling, and then dry and solidify on the surface of the Hastelloy alloy base material to obtain an oxide connection layer.

[0035] The specific steps are: mix 20mL ethanol and 1mL acetyl ethyl acetate evenly, add 4mL tetrabutyl titanate, stir for 1 hour, slowly add 0.2mL deionized water, stir for 10 hours, and age for 24 hours to obtain TiO 2 Sol 1; soak the cleaned Hastelloy substrate in TiO 2 After 3 minutes in Sol 1, pull...

Embodiment 2

[0043] 1. Clean the Hastelloy substrate used in the experiment with an ultrasonic cleaner and air dry it. The cleaning steps are: put the Hastelloy alloy substrate into acetone, ethanol and deionized water for 10 minutes for ultrasonic cleaning; then put it into lye (containing: NaOH 15g / L, NaOH 2 CO 3 25g / L, Na 3 PO 4 25g / L) at 80°C for 4 hours, rinsed with deionized water and ultrasonically washed to completely remove the grease and pollutants on the surface.

[0044] 2. Preparation of TiO 2 Sol 1, put the Hastelloy alloy base material into the sol 1 to dip and pull, dry and solidify to obtain the oxide connection layer. The specific steps are: mix 20mL ethanol and 1mL acetyl ethyl acetate evenly, add 4mL tetrabutyl titanate, stir for 1 hour, slowly add 0.2mL deionized water, stir for 10 hours, and age for 24 hours to obtain TiO 2 Sol 1; soak the cleaned Hastelloy substrate in TiO 2 After 3 minutes in Sol 1, pull out at a speed of 2-3mm / s, and after standing at room ...

Embodiment 3

[0050] 1. Clean the Hastelloy substrate used in the experiment with an ultrasonic cleaner and air dry it. The cleaning steps are: put the Hastelloy alloy substrate into acetone, ethanol and deionized water for 10 minutes for ultrasonic cleaning in turn; 2 CO 3 25g / L, Na 3 PO 4 25g / L) at 80°C for 4 hours, rinsed with deionized water and ultrasonically washed to completely remove the grease and pollutants on the surface.

[0051] 2. Preparation of TiO 2 Sol 1, put the Hastelloy alloy base material into the sol 1 to dip and pull, dry and solidify to obtain the oxide connection layer. The specific steps are: mix 20mL ethanol and 1mL acetyl ethyl acetate evenly, add 4mL tetrabutyl titanate, stir for 1 hour, slowly add 0.2mL deionized water, stir for 10 hours, and age for 24 hours to obtain TiO 2 Sol 1; soak the cleaned Hastelloy substrate in TiO 2 After 3 minutes in Sol 1, pull out at a speed of 2-3mm / s, and after standing at room temperature for 5 minutes, repeat the above...

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Abstract

The invention discloses a method for preparing a coating having corrosion-resisting and self-cleaning functions, which belongs to the field of new materials. The method comprises the following steps: cleaning and drying the surface of a coated material; utilizing a sol thermo-curing method to prepare an oxide connecting layer on the surface of the coated material substrate; coating a prepared colloidal solution containing nanometer solid grains onto the oxide connecting layer; and after forming a film and curing, coating a material with low surface energy on the surface, thereby obtaining the surface having a self-cleaning function. The surface of a product obtained in the technique of the method is higher in hydrophobic property, is capable of achieving a self-cleaning effect and is ultrahigh in corrosion resistance. The method has the advantages that the demand on equipment is low; the method is free from being limited by the shape of the surface of the coated material; the material substrates, such as ceramics, glass, metal and the like, can be subjected to coating and film-forming treatment according to the method; industrialization is easily realized; and the product after being subjected to the coating and film-forming treatment can be applied to various severe corroding environments and has an ultrahigh application value.

Description

technical field [0001] The invention belongs to the field of new materials, in particular to a preparation method of a self-cleaning coating with corrosion resistance. Background technique [0002] In national production and life, various materials are widely used in various fields. However, ordinary materials will inevitably suffer from environmental corrosion and pollution during normal use, which will affect the performance of materials. Therefore, corrosion-resistant and self-cleaning coatings have become the focus of discussion. In recent years, literatures and patents have reported that the method of preparing superhydrophobic surface can reduce the contact between the material surface and water, so as to realize the self-cleaning of the material. In addition, in humid or various corrosive working environments, some materials, especially metal materials, are easily corroded, which affects the service life of the material, causes it to not function normally, and also ...

Claims

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Application Information

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IPC IPC(8): C03C17/34C04B41/53C23C20/08
Inventor 潘伟胡亚微
Owner TSINGHUA UNIV
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