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Compound method for preparing magnesium alloy having superhydrophobic surface

A super-hydrophobic surface, magnesium alloy technology, applied in the field of super-hydrophobic surface preparation of magnesium alloys, can solve the problems of poor controllability and time-consuming, and achieve the effects of easy operation, convenient operation, and simple and easy preparation process.

Inactive Publication Date: 2011-01-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are no special requirements for equipment and the preparation process is relatively simple, the entire preparation process is still completed in multiple steps, and the time-consuming is too long and the controllability is poor.

Method used

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  • Compound method for preparing magnesium alloy having superhydrophobic surface
  • Compound method for preparing magnesium alloy having superhydrophobic surface
  • Compound method for preparing magnesium alloy having superhydrophobic surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The surface of AZ31 magnesium alloy was chemically etched with sulfuric acid aqueous solution with a concentration of 7g / L, the etching temperature was 20°C, and the etching time was 10min, so as to build a first-level rough structure on the surface【 figure 1 Shown]. Clean the magnesium alloy after sulfuric acid etching with deionized water to remove residual sulfuric acid, then take it out and dry it for later use;

[0030] Prepare the myristic acid electrolyte: dissolve myristic acid and glycerin in ethanol, the concentration of myristic acid is 3wt%, the concentration of glycerin is 0.9wt%, and the concentration of ethanol is 96.1wt%.

[0031] The nickel is used as the cathode, and the above chemically etched magnesium alloy is used as the anode, placed in the myristic acid electrolyte, the electrolysis temperature is 20°C, the voltage is 3V, and the electrolysis time is 1 hour. After the anodic oxidation treatment, take out the magnesium alloy, wash it with deioni...

Embodiment 2

[0035] The surface of the AZ31 magnesium alloy was chemically etched with sulfuric acid aqueous solution with a concentration of 15g / L, the etching temperature was 20°C, and the etching time was 5min, so as to build a first-level rough structure on the surface. Clean the magnesium alloy after sulfuric acid etching with deionized water to remove residual sulfuric acid, then take it out and dry it;

[0036] Prepare the myristic acid electrolyte: dissolve myristic acid and glycerin in ethanol, the concentration of myristic acid is 6wt%, the concentration of glycerol is 1.4wt%, and the concentration of ethanol is 92.6wt%.

[0037] The nickel is used as the cathode, and the above chemically etched magnesium alloy is used as the anode, placed in the myristic acid electrolyte, the electrolysis temperature is 20°C, the voltage is 7V, and the electrolysis time is 0.5 hours. After the anodic oxidation treatment, the magnesium alloy was taken out, washed with deionized water, placed in a...

Embodiment 3

[0041] A composite preparation method of a magnesium alloy with a superhydrophobic surface, said method comprising the following steps:

[0042](1) The surface of the magnesium alloy is chemically etched using an aqueous solution of sulfuric acid with a mass volume concentration of 5g / L~20g / L. The etching temperature is 20°C~30°C, and the etching time is 5min~10min. In this embodiment Among them, the mass volume concentration of sulfuric acid aqueous solution is 5g / L or 20g / L, the etching temperature is 20°C or 30°C, and the etching time is 5min or 10min,

[0043] (2) Using myristic acid solution as the electrolyte, using the anodic oxidation method, the structure of the secondary structure and the modification of the low surface energy are simultaneously carried out on the surface of the magnesium alloy. The described myristic acid solution is to dissolve myristic acid and glycerin in ethanol , the concentration of myristic acid is 2wt%~6wt%, the concentration of glycerin is ...

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Abstract

The invention relates to a compound method for preparing a superhydrophobic surface of magnesium alloy, which comprises the following steps: carrying out chemical etching on the surface of the magnesium alloy with sulfuric acid to construct a primary minute structure, and then simultaneously constructing a secondary structure and carrying out low-surface energy modification on the surface of the magnesium alloy by an anodic oxidation process to obtain the magnesium alloy surface which enables water drops not to adhere easily and has fine superhydrophobicity. The technical method of the invention has the following advantages: 1) the contact angle between the prepared magnesium alloy surface and water is up to 160 degrees, and the surface has low adhesion and excellent superhydrophobicity; 2) the superhydrophobic surface is prepared by combining chemical etching and electrochemical processes, thereby achieving better hydrophobicity and stability; 3) the construction of the secondary structure and the low-surface energy modification are simultaneously carried out by using the anodic oxidation process, thereby further optimizing the minute structure and ensuring prefarably bonding force between film and substrate; and 4) the invention has the characteristics of simple preparation process and required equipment, high preparation process efficiency, easy operation, high controllability, low combined cost and easy industrialized application.

Description

technical field [0001] The invention relates to a method for preparing a super-hydrophobic surface of a magnesium alloy. The surface of a super-hydrophobic magnesium alloy is obtained through a composite treatment of a chemical method and an electrochemical method and using a low-cost reaction reagent. [0002] Background technique [0003] Magnesium alloy is known as "the green engineering material of the 21st century". unique advantages of the series. It plays an important role in energy saving, environmental protection, and automobile lightweight. It has extremely important application value and broad application prospects in the fields of automobiles, electronics, electrical appliances, transportation, aerospace, aviation, and national defense military industries. It is after steel and aluminum alloys. The third type of metal structural materials developed. However, magnesium alloy has poor corrosion resistance due to its high chemical activity, high sensitivity to im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C25D11/30
Inventor 余新泉周荃卉张友法黄艳萍陈锋
Owner SOUTHEAST UNIV
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