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Preparation method of magnesium alloy with super-hydrophobic coating on surface

A magnesium alloy, super-hydrophobic technology, applied in the direction of coating, liquid chemical plating, metal material coating technology, etc., can solve the problems that magnesium alloy cannot be directly applied to magnesium alloy, cannot be mass-produced, and is harmful to human body and environment. Achieve the effects of improving corrosion resistance and self-cleaning performance, shortening production time and shortening reaction time

Inactive Publication Date: 2012-08-01
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few domestic and foreign reports about the preparation of superhydrophobic surfaces on magnesium alloys, mostly on inert substrates (such as copper, stainless steel, single crystal silicon, etc.)
Moreover, in these preparation processes, there are usually two disadvantages, one is high cost, cannot be mass-produced, and cannot be directly applied to magnesium alloys due to the high activity of magnesium alloys; another disadvantage is that in the step of reducing surface energy, absolutely Most use fluorine-containing reagents, which are expensive and harmful to humans and the environment

Method used

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  • Preparation method of magnesium alloy with super-hydrophobic coating on surface
  • Preparation method of magnesium alloy with super-hydrophobic coating on surface
  • Preparation method of magnesium alloy with super-hydrophobic coating on surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The material is AZ91D magnesium alloy, the specific operation steps are as follows:

[0044] (1) Pretreatment

[0045] 1) Mechanical grinding Use 150, 400, 800 and 1500 mesh SiC sandpaper to polish the magnesium alloy substrate in sequence to remove surface oxides, burrs and dirt, etc., and rinse with water after completion.

[0046] 2) Soak the magnesium alloy sample after ultrasonic degreasing and polishing in acetone solution, and ultrasonically clean it for 5-7 minutes at room temperature.

[0047] 3) Alkaline washing and degreasing

[0048] Alkali lotion formula and operating conditions are: Na 2 CO 3 20g·L -1 , NaOH 10g·L -1 , sodium lauryl sulfate 0.5g L -1 , temperature 75°C, time 5min.

[0049] (2) pickling and activation

[0050] Pickling-activation is used to complete the process once, and the specific formula and operating conditions are as follows: ethanol 50mL·L -1 , acetic acid 20mL·L -1 , phosphoric acid 20mL·L -1 , nitric acid 5mL·L -1 , Mn(...

Embodiment 2

[0069] Carry out by following processing parameter, other are all identical with embodiment 1.

[0070]

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Abstract

The invention relates to a preparation method of magnesium alloy with a super-hydrophobic coating on the surface. According to the preparation method, the magnesium alloy is provided with the super-hydrophobic coating through an innovative process to improve the corrosion resistance capacity, and meanwhile, new anti-pollution and self-cleaning functions are given to the magnesium alloy. The method has the characteristics of simplicity, quickness, capability of greatly shortening reaction time, suitability for industrial production and environmental friendliness.

Description

technical field [0001] The invention relates to the field of surface modification of metal materials, in particular to a process for preparing a superhydrophobic coating on the surface of a magnesium alloy. Background technique [0002] Magnesium alloys are widely used in automobiles, aerospace, communications, and computer manufacturing because of their low density, high specific strength, high specific stiffness, and specific elastic modulus, good casting performance, machining performance, and electromagnetic shielding performance. Due to energy, environmental and other issues, the automobile industry has put forward more urgent requirements for automobile weight reduction, because reducing the weight of automobiles can reduce energy consumption and pollution (including reducing automobile exhaust and waste plastics). At the same volume, magnesium alloy is 36% lighter than aluminum alloy, 73% lighter than zinc alloy, and 77% lighter than steel, which just meets the needs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/38C25D5/42C25D5/48C23C18/36C23F17/00
Inventor 李青王忠维佘祖新陈福南李龙芹
Owner SOUTHWEST UNIVERSITY
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