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Method for fabricating magnesium alloy super-hydrophobic surface

A technology of super-hydrophobic surface and magnesium alloy, which is applied to the device for coating liquid on the surface, the pretreatment surface, and the plating of superimposed layers, etc., can solve the problems that affect the completion of flight missions, corrosion of magnesium alloy parts, etc., and achieve good results Mechanical properties, anti-corrosion, and the effect of increasing driving speed

Inactive Publication Date: 2009-07-01
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Rainwater and humid ocean atmosphere cause serious corrosion to aircraft structural parts, especially magnesium alloy parts, so that it seriously affects the completion of flight missions

Method used

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Examples

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Effect test

Embodiment 1

[0017] The sample to be processed is a die-cast AZ91D magnesium alloy with a size of 25mm×14mm×12mm in block shape. The specific operation steps are as follows:

[0018] 1. Sample pretreatment: Q Use 500-1000# water sandpaper to polish the surface of the sample in sequence until the roughness Ra≈0.18μm. Use ordinary detergent to clean the surface of the polished sample to remove oil stains, and then rinse with distilled water before use;

[0019] 2. Put the processed magnesium alloy sample into the phosphate system (8-12g / L sodium phosphate, 0.5-1.5g / L potassium hydroxide) electrolyte, and use the micro-arc oxidation treatment process to obtain roughness on the surface of the magnesium alloy The micro / nano porous surface, the magnesium alloy sample is used as the anode, and the stainless steel electrolytic cell doubles as the cathode. During the micro-arc oxidation process, the electrolyte temperature is always kept between 25 and 30°C, and the current density is constant at ...

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Abstract

The invention discloses a method for preparing magnesium alloy super-hydrophobic surface. The method comprises: cleaning the magnesium alloy after conventional pretreatment, adopting the micro-arc oxidation technique to form a roughening micro / nano porous surface on the surface of a sample in a phosphate electrolyte, treating the surface in an acrylic acid solution, performing spin coating of ethylene dimethyl silicone polymer on the surface, and drying the processed sample to prepare the magnesium alloy super-hydrophobic surface.

Description

technical field [0001] The invention relates to a method for constructing a new structure on a metal surface, in particular to a method for manufacturing a superhydrophobic surface of a magnesium alloy. Background technique [0002] Magnesium alloys have some advantages that other materials cannot match in the fields of automobile industry, aerospace, weapons and equipment, as well as computers, communication products and consumer 3C electronic products. Magnesium has the lowest potential among all structural metals, and its chemical activity is very high. The oxide film of magnesium is loose, so the corrosion resistance of magnesium alloys is poor. Especially in humid air, sulfur-containing atmosphere and marine atmosphere, the corrosion problem of magnesium alloy parts is more serious. For example: a certain type of aircraft located at a coastal airport flies all year round, parks in a relatively harsh marine atmosphere, and has been in a high-humidity, high-temperature, ...

Claims

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Application Information

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IPC IPC(8): C23C28/00C25D11/30C23C22/57B05D7/24B05D3/02
Inventor 王立平薛群基刘维民梁军郭志光
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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