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Super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and preparation method thereof

An amorphous coating, super-hydrophobic technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problem of no major breakthrough in the three-dimensional block preparation technology, achieve low cost, uniform composition, simple craftsmanship

Inactive Publication Date: 2021-06-22
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the harsh preparation process such as high vacuum and the limitation of room temperature brittleness, most of them only exist in the form of powder, thin strips, millimeter rods, etc., and there has been no major breakthrough in the preparation technology of three-dimensional blocks.

Method used

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  • Super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and preparation method thereof
  • Super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and preparation method thereof
  • Super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing a superhydrophobic corrosion-resistant and anti-fouling aluminum-based amorphous coating, specifically comprising the following steps:

[0036] (1) Substrate surface pretreatment

[0037] The surface of the sample was polished with sandpaper to remove oxides, and the polished sample was ultrasonically cleaned with absolute ethanol and acetone for 10 minutes to remove surface particle impurities and oil stains. After natural air-drying, in order to ensure a good bonding force between the coating and the substrate, the surface of the sample is sandblasted by sandblasting to improve the surface roughness. The sandblasting process parameters are: compressed air pressure 0.7MPa, The relative distance is 100mm, the angle is 70-90°, and the particle size of white corundum sand for sandblasting is 20 mesh.

[0038] (2) Preparation of aluminum-based amorphous coating

[0039] The aluminum-based amorphous coating is prepared by high-speed arc spraying tec...

Embodiment 2

[0046] A method for preparing a superhydrophobic corrosion-resistant and anti-fouling aluminum-based amorphous coating, specifically comprising the following steps:

[0047] (1) Substrate surface pretreatment

[0048] The surface of the sample was polished with sandpaper to remove oxides, and the polished sample was ultrasonically cleaned with absolute ethanol and acetone for 10 minutes to remove surface particle impurities and oil stains. After natural air-drying, in order to ensure a good bonding force between the coating and the substrate, the surface of the sample is sandblasted by sandblasting to improve the surface roughness. The sandblasting process parameters are: compressed air pressure 0.7MPa, The relative distance is 100mm, the angle is 70-90°, and the particle size of white corundum sand for sandblasting is 20 mesh.

[0049] (2) Preparation of aluminum-based amorphous coating

[0050] The aluminum-based amorphous coating is prepared by high-speed arc spraying tec...

Embodiment 3

[0057] A method for preparing a superhydrophobic corrosion-resistant and anti-fouling aluminum-based amorphous coating, specifically comprising the following steps:

[0058] (1) Substrate surface pretreatment

[0059] The surface of the sample was polished with sandpaper to remove oxides, and the polished sample was ultrasonically cleaned with absolute ethanol and acetone for 10 minutes to remove surface particle impurities and oil stains. After natural air-drying, in order to ensure a good bonding force between the coating and the substrate, the surface of the sample is sandblasted by sandblasting to improve the surface roughness. The sandblasting process parameters are: compressed air pressure 0.7MPa, The relative distance is 100mm, the angle is 70-90°, and the particle size of white corundum sand for sandblasting is 20 mesh.

[0060] (2) Preparation of aluminum-based amorphous coating

[0061] The aluminum-based amorphous coating is prepared by high-speed arc spraying tec...

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Abstract

The invention discloses a super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and a preparation method thereof. The method comprises the following steps of S1, base material surface pretreatment, S2, aluminum-based amorphous coating preparation, S3, coating surface chemical etching and S4, low-surface-energy substance modification. The method has the following advantages that (1) the process is simple, the efficiency is high, the method is suitable for site construction, the cost is low, and large-area preparation on a non-planar complex structure substrate can be realized; (2) the coating is low in oxide content, uniform in component and compact in structure, the porosity is less than 2%, the coating is well combined with a substrate, the amorphous content of the coating is greater than 80vol.%, and the coating has excellent wear resistance and corrosion resistance; (3) a contact angle is larger than 150 degrees, a rolling angle is smaller than 10 degrees, and the coating has good hydrophobicity, shows excellent waterproof, self-cleaning and corrosion-resistant properties, and also has high wear resistance of an amorphous coating; and (4) the coating can be applied to various occasions needing self-cleaning, corrosion resistance, icing resistance, energy-saving fluid conveying and the like, such as the outer surfaces of various industrial parts and the inner walls of pipelines.

Description

technical field [0001] The invention belongs to the field of material surface engineering, and relates to a preparation technology of a superhydrophobic coating on the surface of key components of marine engineering equipment, in particular to a superhydrophobic corrosion-resistant and antifouling antifouling aluminum-based amorphous coating and a preparation method thereof. Background technique [0002] Marine equipment has been in harsh marine environment for a long time, and the corrosion damage, abrasion failure and biofouling of marine engineering materials are inevitable, thus bringing huge economic losses. The failure of marine engineering materials has become one of the factors restricting the development of marine engineering technology and equipment, which has attracted great attention from governments and marine industries around the world. Therefore, it is urgent to develop high-performance materials and improve surface protection technology to ensure the long-te...

Claims

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Application Information

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IPC IPC(8): C23C4/131C23C4/02C23C4/06C23C4/16C23C4/18C23C22/68C23F1/36
CPCC23C4/131C23C4/02C23C4/06C23C4/18C23C4/16C23F1/36C23C22/68
Inventor 程江波王秀雨严晨葛云云张连华陈习中
Owner HOHAI UNIV
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