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Method for preparing light metal super-hydrophobic surface

A super-hydrophobic surface, light metal technology, applied in chemical instruments and methods, anodizing, other chemical processes, etc., can solve the problems of surface rust, decreased corrosion resistance of metal substrates, and difficulty in rolling water droplets to reduce friction. , excellent corrosion resistance, superior superhydrophobicity

Inactive Publication Date: 2009-05-06
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some shortcomings in the above treatment methods, such as the corrosion method reduces the corrosion resistance of the metal substrate, and the surface is easily rusted, and the hydrophobic surface formed after sandblasting is difficult for water droplets to roll on.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Wash in 60g / L, 70°C NaOH alkaline solution for 1min to remove the grease on the surface of light metal, perform anodic oxidation respectively after washing, then put it into the reactor for low-temperature plasma treatment, and immediately immerse it in 4mM Soak in n-hexane / carbon tetrachloride solution of tetrahydroperfluorodecyltrichlorosilane for 1h, then rinse with dichloromethane and dry naturally, measure its contact angle with water, surface microhardness and salt corrosion resistance sex. Process parameters and obtained results are as follows:

[0021]

Embodiment 2

[0022] Example 2: Wash in 60g / L, 70°C NaOH alkaline solution for 1min to remove the grease on the surface of light metal, perform anodic oxidation respectively after washing, then put it into the reactor for low-temperature plasma treatment, immediately immerse in 10mM Put stearic acid in n-hexane solution for 24 hours, then wash it repeatedly with n-hexane, dry it naturally, measure its contact angle with water, surface microhardness and salt corrosion resistance. Process parameters and obtained results are as follows:

[0023]

Embodiment 3

[0024] Example 3: Wash in 60g / L, 70°C NaOH alkaline solution for 1min to remove the grease on the surface of light metals. After washing with water, carry out anodic oxidation respectively, then put them into the reactor for low-temperature plasma treatment, and immediately immerse them in 5mM Stand in the methanol solution of tetrahydroperfluorodecyltrimethoxysilane for 2h, then rinse with methanol, dry naturally, and measure its contact angle with water, surface microhardness and salt corrosion resistance. Process parameters and obtained results are as follows:

[0025]

[0026]

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PUM

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Abstract

The invention relates to a preparation method for a light metal superhydrophobic surface, in particular to a light metal surface with a superhydrophobic property and corrosion and wear resistance. The preparation method comprises the following steps: a layer of porous oxidation film is formed on the surface through anodic oxidation of the light metal surface first; the surface is modified by a low-temperature plasma treatment technique; and at last, the superhydrophobic surface is formed on the surface of the oxidation film through chemical modification. The method does not require complex and expense equipment and has a simple process, good repetitiveness, a contact angle of the surface and water up to 153 to 170 degrees as well as good corrosion and wear resistance.

Description

technical field [0001] The invention relates to a method for preparing a lightweight metal superhydrophobic surface, belonging to the field of surface treatment of metal substrates. Background technique [0002] In nature, the surfaces of the leaves of various plants represented by lotus leaves, the wings of butterflies and other Lepidoptera insects, and the feathers of waterfowl all have superhydrophobicity, so as to achieve the function of self-cleaning. Because of its self-cleaning, antifouling, hydrophobic, oleophobic, low friction coefficient and other characteristics, it has extremely broad application prospects in industrial and agricultural production and people's daily life. The self-cleaning phenomenon in nature has stimulated the research on biomimetic superhydrophobic surfaces. At present, a variety of preparation methods have emerged in the construction of biomimetic superhydrophobic rough surfaces, such as lithography, etching, nanoarray, vapor deposition, pha...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23F4/00C23G1/22C25D11/02C09K3/18
Inventor 乌学东王慧史明辉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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