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Magnesium alloy surface super hydrophobic membrane layer and preparation method and application thereof

A magnesium alloy and super-hydrophobic technology, applied in the field of super-hydrophobic film layer on the surface of magnesium alloy and its preparation, can solve the problems of low application value, complicated process, and limited service life, and achieve easy processing, simple process, and production short cycle effect

Inactive Publication Date: 2014-08-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of preparing superhydrophobic surface on magnesium alloy has gradually become a research hotspot. For example, Chinese invention patent application 200710078089.3 discloses a method for preparing superhydrophobic surface of magnesium alloy. It undergoes micro-arc oxidation treatment to obtain a rough surface, and then undergoes acrylic acid treatment. Finally, vinyl polydimethylsiloxane is modified on the surface by spin coating method. Because it needs chemical etching of acrylic acid after micro-arc oxidation, the process is relatively complicated, and then the binding force of superhydrophobic surface prepared by spin coating method is physical. Adsorption or Van der Waals force combination, the service life is limited, and the spin coating process requires special equipment, so the practical application value is not high

Method used

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  • Magnesium alloy surface super hydrophobic membrane layer and preparation method and application thereof
  • Magnesium alloy surface super hydrophobic membrane layer and preparation method and application thereof
  • Magnesium alloy surface super hydrophobic membrane layer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The MB8 magnesium alloy sheet with a size of 50×30×4 (mm) is subjected to surface pretreatment followed by chemical zinc immersion, electrochemical deposition of copper and self-assembly modification to obtain a super-hydrophobic surface with outstanding structural features. The specific steps include the following steps and Process conditions:

[0043] Step 1: MB8 magnesium alloy surface pretreatment

[0044] The MB8 magnesium alloy surface pretreatment process includes successively undergoing mechanical grinding, ultrasonic degreasing, alkali washing degreasing, pickling and activation:

[0045] (1) Mechanical grinding: use 360, 800, 1200 mesh SiC sandpaper to polish the magnesium alloy substrate in sequence to remove surface oxides, burrs and dirt, etc., and rinse with deionized water after completion;

[0046] (2) Ultrasonic cleaning: ultrasonically clean the polished magnesium alloy sample in acetone for 10 minutes at room temperature;

[0047] (3) Alkali washing...

Embodiment 2

[0065] The AZ31 magnesium alloy sheet with a size of 30×15×4 (mm) is subjected to surface pretreatment followed by chemical zinc immersion, electrochemical deposition of copper and self-assembly modification to obtain a super-hydrophobic surface, specifically including the following steps and process conditions:

[0066] Step 1: AZ31 magnesium alloy surface pretreatment

[0067] (1) Mechanical grinding: use 360, 800, 1200 mesh SiC sandpaper to polish the magnesium alloy substrate in sequence to remove surface oxides, burrs and dirt, etc., and rinse with deionized water after completion;

[0068] (2) Ultrasonic cleaning: ultrasonically clean the polished magnesium alloy sample in acetone for 10 minutes at room temperature;

[0069] (3) Alkali washing to remove oil: Alkaline liquid formula and process conditions: Na 2 CO 3 20g / L, Na 3 PO 4 20g / L, emulsifier OP10 2mL / L, treatment time 10min, temperature 55℃;

[0070] (4) Pickling: pickling liquid formula and process conditio...

Embodiment 3

[0087] The ZK60 magnesium alloy sheet with a size of 20×20×3 (mm) is subjected to surface pretreatment followed by chemical zinc immersion, electrochemical deposition of copper and self-assembly modification to obtain a super-hydrophobic surface, specifically including the following steps and process conditions:

[0088] Step 1: ZK60 magnesium alloy surface pretreatment

[0089] The ZK60 magnesium alloy surface pretreatment process includes, sequentially undergoing mechanical grinding, ultrasonic degreasing, alkali washing degreasing, pickling and activation:

[0090] (1) Mechanical grinding: use 360, 800, 1200 mesh SiC sandpaper to polish the magnesium alloy substrate in sequence to remove surface oxides, burrs and dirt, etc., and rinse with deionized water after completion;

[0091] (2) Ultrasonic cleaning: ultrasonically clean the polished magnesium alloy sample in acetone for 10 minutes at room temperature;

[0092] (3) Alkali washing to remove oil: Alkaline liquid formula ...

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Abstract

The invention belongs to the technical field of metal material surface treatment, and discloses a magnesium alloy surface super hydrophobic membrane layer and a preparation method and application thereof. The preparation method comprises the preparation of a coarse structure on magnesium alloy surface and low surface free energy material modification, the preparation of the coarse structure refers to sequential zinc chemical immersion and copper electrodeposition of conventionally preprocessed magnesium alloy, and the low surface free energy material modification refers to self-assembly modification by a water-soluble fluorine-containing tri-nitrogen hetero-piperazine thiol organic salt. The preparation method of the magnesium alloy surface super hydrophobic membrane layer has the advantages of being simple in process and less time-consuming, by using of the water-soluble fluorine-containing tri-nitrogen hetero-piperazine thiol organic salt for alloy self-assembly modification on the surface, the function of the triazine thiol organic matter can be developed, self-assembly modification on the alloy surface can be realized, used zinc chemical immersion and copper electrodeposition formulas are environmentally friendly formulas, and the processing technologies are applicable to production of large area, a feasible method for industrial application and large area production of super hydrophobic surfaces can be provided.

Description

technical field [0001] The invention belongs to the technical field of surface treatment and modification of metal materials, and in particular relates to a super-hydrophobic film layer on the surface of a magnesium alloy and a preparation method and application thereof. Background technique [0002] As the lightest metal structural material at present, magnesium alloy has good electromagnetic shielding performance, electrical and thermal conductivity, machinability, casting performance and high specific strength, specific stiffness and specific modulus of elasticity; in addition, magnesium alloy is easy to recycle and reuse Therefore, magnesium alloy is known as "the green engineering material with the most development and application potential in the 21st century", and is widely used in aerospace, electronic products, automobile industry, national defense and military industry and other fields. [0003] However, due to the high chemical activity of magnesium alloys, compar...

Claims

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Application Information

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IPC IPC(8): C25D5/48C23C18/31C25D3/38C23F17/00
Inventor 康志新刘秦李伟张俊逸陈德馨
Owner SOUTH CHINA UNIV OF TECH
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