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Surface treatment method for obtaining super hydrophobic aluminum or aluminum alloy surface

An aluminum alloy surface and surface treatment technology, applied in the field of metal surface treatment, can solve the problems such as the decline of superhydrophobicity and the loss of superhydrophobicity, and achieve the effect of excellent superhydrophobicity, wide application range and excellent superhydrophobicity

Active Publication Date: 2014-08-20
NINGBO NOVO NEW MATER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that as the surface temperature of the material drops, its superhydrophobic properties will gradually decrease, and when the temperature drops below zero, its superhydrophobic properties will even be lost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The surface treatment method of the aluminum sample of embodiment 1, comprises the following steps:

[0022] 1) Pretreatment: Ultrasonic cleaning of the aluminum sample in deionized water, acetone, ethanol, and deionized water in sequence to remove surface impurities, oil, etc., to obtain a clean aluminum sample;

[0023] 2) Morphology treatment: including laser processing and nanostructure treatment:

[0024] Laser processing: laser processing is used to process a plurality of circular micron-scale holes on the surface of the aluminum sample, the hole diameter is about 50 μm, the depth of the holes is 10~25 μm, and the center distance between two adjacent holes is 1~200μm;

[0025] Nanostructured treatment: place the laser processed aluminum sample in boiling water for 10 minutes to form multiple nanoscale holes on the surface of the aluminum sample;

[0026] The aluminum sample after the above morphology treatment has a micro-nano composite scale surface morphology;...

Embodiment 2

[0029] The surface treatment method of the aluminum sample of embodiment 2, comprises the following steps:

[0030] 1) Pretreatment: Ultrasonic cleaning of the aluminum sample in deionized water, acetone, ethanol, and deionized water in sequence to remove surface impurities, oil, etc., to obtain a clean aluminum sample;

[0031] 2) Morphology treatment: including laser processing and nanostructure treatment:

[0032] Laser processing: Laser processing is used to process multiple circular micron-scale holes on the surface of the aluminum sample, the hole diameter is about 20 μm, the depth of the hole is 5~20 μm, and the center distance between two adjacent holes is 20~100μm;

[0033] Nanostructured treatment: the aluminum sample is evaporated in vacuum by vacuum evaporation, and nanoscale aluminum particles are precipitated on the surface of the aluminum sample, so that the aluminum sample has a nanoscale surface morphology;

[0034] The aluminum sample after the above morpho...

Embodiment 3

[0037] The surface treatment method of the aluminum sample of embodiment 3, comprises the following steps:

[0038] 1) Pretreatment: Ultrasonic cleaning of the aluminum sample in deionized water, acetone, ethanol, and deionized water in sequence to remove surface impurities, oil, etc., to obtain a clean aluminum sample;

[0039] 2) Morphology treatment: nanostructure treatment: place the aluminum sample after laser processing in boiling water for 15 minutes, and form multiple nanoscale holes on the surface of the aluminum sample;

[0040]3) Surface coating: After mixing the ethanol solution of fluorine-containing silicone resin and curing agent evenly, it is coated on the surface of the aluminum sample with nano-scale surface morphology, and cured at room temperature to form a film to obtain super-repellent micron water droplets. Aluminum samples of Example 3. The static contact angle of condensed water droplets was tested on the aluminum sample of Example 3, and the measured...

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Abstract

The invention discloses a surface treatment method for obtaining a super hydrophobic aluminum or an aluminum alloy surface. The surface treatment method comprises the following steps: carrying out cleaning treatment on an aluminum or aluminum alloy surface by using deionized water, acetone, ethanol and deionized water sequentially, so as to obtain clean aluminum or aluminum alloy surface; and forming coarse micron scale surface topography, nanoscale surface topography or micron-nano composite scale surface topography on the clean aluminum or aluminum alloy surface. The aluminum or aluminum alloy surface treated by the method disclosed by the invention has excellent super-hydrophobicity; the static contact angle of water droplets can be up to be over 150 degrees; the contact angle hysteresis is below 10 degrees. The surface treatment method is applicable to super hydrophobic treatment of aluminum or aluminum alloy parts of an evaporator, aluminum alloy doors and windows, aluminum alloy parts of a transport aircraft, and surfaces of other aluminum or aluminum alloy components in equipment such as refrigeration equipments, air source heat pumps and the like, and especially applicable to super hydrophobic treatment of aluminum or aluminum alloy surfaces of which condensed water droplets even condensed micro droplets are super-hydrophobic.

Description

technical field [0001] The invention relates to a metal surface treatment method, in particular to a surface treatment method for obtaining superhydrophobic aluminum or aluminum alloy surfaces. Background technique [0002] The wettability of water on the material surface is related to the physical structure and chemical properties of the material surface. Superhydrophobicity in the general sense refers to the material surface at room temperature, which is super hydrophobic to water droplets at room temperature. The static contact angle of water droplets on the material surface is above 150°, and the contact angle hysteresis is below 10°. However, studies have shown that as the surface temperature of the material drops, its superhydrophobic performance will gradually decrease, and when the temperature drops below zero, its superhydrophobic performance will even be lost. For condensed water droplets, especially for smaller condensed micron water droplets, the general superhy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/36B23K26/36C23C14/24C23C14/16C23C16/44C23C16/00B05D5/00
Inventor 王健君吕健勇邵永明邵文义
Owner NINGBO NOVO NEW MATER TECH
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