A method for preparing superhydrophobic and corrosion-resistant surface of cast iron by using ultrashort pulse laser

An ultra-short pulse laser and ultra-short pulse technology, which is applied in the field of surface modification of metal materials, can solve the problems of incomplete breakthrough in the surface treatment process, complex treatment process and high treatment cost, and achieves easy control of process parameters, simple process, good quality The effect of superhydrophobicity

Inactive Publication Date: 2017-10-13
HUBEI UNIV OF TECH
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Problems solved by technology

The patent with the application number 201310079939.7 discloses a preparation method of an aluminum alloy biomimetic superhydrophobic surface. First, the aluminum alloy is cleaned with absolute ethanol, and then laser processing is performed on the aluminum alloy surface to process countless microscale craters on the surface of the sample. structure, and then immerse the sample in a chemical etching solution to change the morphology of the sample surface. However, this method does not completely break through the traditional chemical etching surface treatment process. After the laser processing process, chemical etching is further used. , and put the chemically etched aluminum alloy sample into a toluene solution containing DTS for modification, and gradually form a low surface energy film on its surface. The treatment process is complicated, and toluene, a highly toxic carcinogen, is easily cause environmental pollution
The patent with the application number 201410657627.4 discloses a super-hydrophobic high-adhesion metal surface and its preparation method. A periodic micro-nano structure with a rose-like surface microstructure is prepared on the metal surface by high-power picosecond or femtosecond laser, and then passed The surface modification of low-free-energy substances realizes the preparation of super-hydrophobic and high-adhesion metal surfaces. This method uses low-surface-energy substances to modify the surface necessary, and the processing efficiency is low; the patent application number 200910183588.8 discloses a bionic metal Super-wetting cross-scale structure design method and preparation method. This method is designed through complex super-hydrophilic theory. The sample to be treated is placed in a high-vacuum chamber and scanned twice at different angles, and finally a surface close to the natural biological surface is obtained. The cross-scale microstructure of the morphology, but this method needs to strictly control various process parameters, the processing cost is too high, and it is completely unsuitable for industrial mass production

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  • A method for preparing superhydrophobic and corrosion-resistant surface of cast iron by using ultrashort pulse laser
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  • A method for preparing superhydrophobic and corrosion-resistant surface of cast iron by using ultrashort pulse laser

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Embodiment 1

[0042] A kind of method that utilizes ultrashort pulse laser to prepare cast iron superhydrophobic corrosion-resistant surface of the present embodiment, comprises the following specific steps:

[0043] Step 1: Polish the cast iron, choose a metallographic sample pre-grinder with a power of 370W, a grinding disc speed of 450 rpm, and a grinding disc diameter of 230 mm. The polishing process requires auxiliary SiC water sandpaper with a diameter of 200 mm and 1000 meshes. The surface of cast iron is polished, and the polishing range is 100cm 2 , the polishing time was 10 minutes, and the cast iron sample after surface polishing was obtained;

[0044] Step 2, the cast iron sample after the surface polishing described in step 1 is cleaned with an ultrasonic cleaner, the ultrasonic frequency of the ultrasonic cleaner is 40kHz, and the surface of the sample is submerged with deionized water with a resistivity of 18.25 megohm, and continuously cleaned for 30 minutes at room temperat...

Embodiment 2

[0054] A kind of method that utilizes ultrashort pulse laser to prepare cast iron superhydrophobic corrosion-resistant surface of the present embodiment, comprises the following specific steps:

[0055] Step 1: Polish the cast iron, choose a metallographic sample pre-grinder with a power of 370W, a grinding disc speed of 450 rpm, and a grinding disc diameter of 230 mm. The polishing process requires auxiliary SiC water sandpaper with a diameter of 200 mm and 1000 meshes. The surface of cast iron is polished, and the polishing range is 100cm 2 , the polishing time was 10 minutes, and the cast iron sample after surface polishing was obtained;

[0056] Step 2, the cast iron sample after the surface polishing described in step 1 is cleaned with an ultrasonic cleaner, the ultrasonic frequency of the ultrasonic cleaner is 40kHz, and the surface of the sample is submerged with deionized water with a resistivity of 18.25 megohm, and continuously cleaned for 30 minutes at room temperat...

Embodiment 3

[0065] A kind of method that utilizes ultrashort pulse laser to prepare cast iron superhydrophobic corrosion-resistant surface of the present embodiment, comprises the following specific steps:

[0066] Step 1: Polish the cast iron, choose a metallographic sample pre-grinder with a power of 370W, a grinding disc speed of 450 rpm, and a grinding disc diameter of 230 mm. The polishing process requires auxiliary SiC water sandpaper with a diameter of 200 mm and 1000 meshes. The surface of cast iron is polished, and the polishing range is 100cm 2 , the polishing time was 10 minutes, and the cast iron sample after surface polishing was obtained;

[0067] Step 2, the cast iron sample after the surface polishing described in step 1 is cleaned with an ultrasonic cleaner, the ultrasonic frequency of the ultrasonic cleaner is 40kHz, and the surface of the sample is submerged with deionized water with a resistivity of 18.25 megohm, and continuously cleaned for 30 minutes at room temperat...

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Abstract

The invention relates to a method for preparing a superhydrophobic corrosion-resistant surface of cast iron by using an ultrashort pulse laser, and belongs to the technical field of surface modification of metal substrates. In this method, the cast iron sample is firstly polished and pretreated, then the surface of the sample is cleaned with deionized water and absolute ethanol, and then dried or air-dried, and then the laser processing technology is used to adjust the relevant process parameters with an ultrashort pulse laser. The surface of the sample is treated, and countless microstructures are processed on the surface of the sample. After the processing is completed, the processed sample is placed in an electric drying oven and baked to obtain the super-hydrophobic and corrosion-resistant surface of the cast iron. The surface has self-cleaning properties. Functional and excellent friction and corrosion resistance. The preparation method of the invention has the advantages of simple process, convenient operation, high efficiency, less energy consumption, low cost, environmental protection and easy industrial application.

Description

Technical field: [0001] The invention belongs to the surface modification technology of metal materials, and relates to a method for preparing a superhydrophobic surface on a cast iron substrate. More specifically, the invention relates to a method for preparing a superhydrophobic and corrosion-resistant surface of cast iron by using an ultrashort pulse laser. Background technique: [0002] Nature provides us with a large number of examples of superhydrophobic, self-cleaning animal and plant surfaces, such as lotus leaves, rice leaves, watermark legs, moth wings, bird feathers and other surfaces. The organisms in nature have evolved various shapes, functions, structures and surfaces of materials through hundreds of millions of evolutions to adapt to the environment in which they live. The surface of this structure has the functions of superhydrophobic non-wetting, self-cleaning, and anti-adhesion. In addition, it also has the functions of stealth, drag reduction, and noise r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D10/00
Inventor 汪军陈列张德生刘顿彼得·班尼特翟中生娄德元杨奇彪胡勇涛
Owner HUBEI UNIV OF TECH
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