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Preparation method of corrosion-resistant super-hydrophobic aluminum surface

A super-hydrophobic, aluminum surface technology, applied in welding equipment, manufacturing tools, laser welding equipment, etc., can solve the problems of weak hydrophobic performance and corrosion resistance, high cost, and achieve good hydrophobic performance, short processing time, and easy availability of raw materials Effect

Inactive Publication Date: 2019-01-22
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the shortcomings of high cost, weak hydrophobicity and anti-corrosion performance in the prior art, the purpose of the present invention is to provide a method for preparing a super-hydrophobic aluminum surface with corrosion resistance

Method used

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  • Preparation method of corrosion-resistant super-hydrophobic aluminum surface
  • Preparation method of corrosion-resistant super-hydrophobic aluminum surface
  • Preparation method of corrosion-resistant super-hydrophobic aluminum surface

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The preparation method of the superhydrophobic aluminum surface of the present embodiment, comprises the steps:

[0034] (1) Pretreatment: 1060 aluminum samples of 20mm×20mm×2mm were ultrasonically cleaned with anhydrous ethanol and distilled water in sequence, with a single cleaning time of 4min and a power of 36kHz, and dried in a constant temperature oven at 110°C for 15min to obtain clean aluminum slice sample;

[0035] (2) Infrared laser processing: use an infrared laser marking machine to etch the surface of the pretreated aluminum sheet sample. The process parameters of laser etching are as follows: the laser frequency is 20kHz, the maximum laser output power is 20W, and the laser wavelength is 1064nm. The speed is 50mm·s -1 , The scanning distance is 200μm, the single exposure time is 5ms, and the grating-like microstructure is etched;

[0036] (3) Reprocessing: Ultrasonic cleaning is performed on the processed samples using absolute ethanol and distilled wate...

Embodiment 2

[0045] The preparation method of the superhydrophobic aluminum surface of the present embodiment, comprises the steps:

[0046] (1) Pretreatment: 1060 aluminum sheet samples of 20mm×20mm×2mm were ultrasonically cleaned with anhydrous ethanol and distilled water in sequence, once cleaned for 4min, with a power of 36kHz, and dried in a constant temperature oven at 110°C for 15min to obtain a clean Aluminum sheet samples;

[0047] (2) Infrared laser processing: use an infrared laser marking machine to etch the surface of the pretreated aluminum sheet sample. The process parameters of the laser etching are: the laser frequency is 20kHz, the maximum laser output power is 20W, and the laser wavelength is 1064nm. The speed is 50mm·s -1 , The scanning distance is 200μm, the single exposure time is 5ms, and the grating-like microstructure is etched;

[0048](3) Reprocessing: Ultrasonic cleaning is performed on the processed samples using absolute ethanol and distilled water in sequen...

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Abstract

The invention belongs to the technical field of metal matrix surface modification and discloses a preparation method of a corrosion-resistant super-hydrophobic aluminum surface. The preparation methodof the corrosion-resistant super-hydrophobic aluminum surface aims at improving the hydrophobic performance and the corrosion-resistant performance of the surface of an aluminum sheet. The method comprises the following steps of (1) infrared nanosecond laser ablation, (2) laser aftertreatment, (3) chemical etching, (4) modification pretreatment and (5) low surface energy modification. According to the preparation method of the corrosion-resistant super-hydrophobic aluminum surface, a microstructure processed through infrared nanosecond laser is high in stability, and then through chemical etching, the aluminum surface with a grating micro-nano-scale double-layer grading structure can be further obtained. The obtained corrosion-resistant super-hydrophobic aluminum surface is high in corrosion resistance and hydrophobicity and achieves a contact angle up to 160.72 degrees.

Description

technical field [0001] The invention relates to the technical field of surface modification of metal materials, in particular to a method for preparing a superhydrophobic aluminum surface with corrosion resistance. Background technique [0002] Aluminum and aluminum alloys are widely used metal materials, because of their low density, high specific strength, low price and easy processing, they are widely used in aerospace, transportation, machinery manufacturing and construction engineering and other fields. Although the aluminum alloy itself has good corrosion resistance, in the ship and submarine industry, due to the presence of various salts dissolved in seawater, there are various ions, especially reducing ions such as chlorine, which will cause corrosion resistance on the surface of aluminum and aluminum alloys. The aluminum oxide film is electrolyzed, greatly reducing the corrosion resistance of the aluminum alloy. Since ships and submarines are immersed in seawater f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352
Inventor 叶霞徐伟顾江范振敏杨晓红张鹏
Owner JIANGSU UNIV OF TECH
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