Method for preparing super-hydrophobic membrane layer on surface of magnesium alloy through one-step method as well as alloy and application of uper-hydrophobic membrane layer

A magnesium alloy, super-hydrophobic technology, applied in the field of magnesium alloy surface treatment and modification, can solve the problems of unsuitability for industrial production, long cycle, complicated operation steps, etc., achieve shortened preparation cycle, simple preparation method, and easy processing process Effect

Inactive Publication Date: 2015-01-07
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

At present, there are more and more methods for preparing superhydrophobic on the surface of magnesium alloys. For example, CN102703886A discloses a method for preparing superhydrophobic surfaces of magnesium alloys. It undergoes surface pickling and electroless silver plating to obtain surface roughness, and then undergoes self-assembled surface modification. Obtain a super-hydrophobic surface on which water droplets are very easy to roll. However, the silver layer grows layer by layer during the electroless silver plating process, and it is easy to fall off, and the operation steps are complicated, so it is not suitable for industrial production
Jiang Lei's research group (Applied Physics Letters, 2008, 92(18), 183103) used chemical etching and surface self-assembly methods to prepare super-hydrophobic surfaces on the surface of magnesium-lithium alloys. However, the self-assembly time is as long as 12h and requires Heating at 100°C for 2 hours, this method obtains rough results by chemical etching and then undergoes low surface free energy modification to obtain a super-hydrophobic surface. Although the method is simple, it has a long cycle and low efficiency, and it is widely used in large-scale applications. more difficult
Generally speaking, the preparation of superhydrophobicity on the surface of magnesium alloy requires two steps: one is to construct a rough structure on the solid surface; the other is to modify the surface with low surface free energy substances; in addition, the existing processes often require harsh equipment, expensive Reagents, longer cycle time, there is still a long way to go before the super-hydrophobic surface is applied to the field of anti-corrosion of magnesium alloys in industry

Method used

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  • Method for preparing super-hydrophobic membrane layer on surface of magnesium alloy through one-step method as well as alloy and application of uper-hydrophobic membrane layer
  • Method for preparing super-hydrophobic membrane layer on surface of magnesium alloy through one-step method as well as alloy and application of uper-hydrophobic membrane layer
  • Method for preparing super-hydrophobic membrane layer on surface of magnesium alloy through one-step method as well as alloy and application of uper-hydrophobic membrane layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The ME20 magnesium alloy sheet with a size of 30×20×4 (mm) is subjected to surface pretreatment and electrochemical deposition to obtain a super-hydrophobic surface with outstanding structural features in one step, specifically including the following steps and process conditions:

[0030] Step 1: Magnesium alloy pretreatment

[0031] Sand the surface of the ME20 magnesium alloy plate to 2000#, ultrasonically clean it with acetone at room temperature for 10 minutes, and dry it with cold air;

[0032] Step 2: Plating solution preparation

[0033] Ce(NO 3 ) 3 ·6H 2 O and myristic acid were dissolved in absolute ethanol, where Ce(NO 3 ) 3 ·6H 2 The concentration of O is 0.1mol / L, and the concentration of myristic acid is 0.2mol / L;

[0034] Step 3: Electrodeposition

[0035] With the polished magnesium alloy sample as the cathode and the cleaned platinum plate as the anode, take 100mL of the electroplating solution prepared in step 2, and electrodeposit it for 20min...

Embodiment 2

[0039] The AZ31 magnesium alloy plate with a size of 30×15×5 (mm) is subjected to surface pretreatment and electrochemical deposition to obtain a super-hydrophobic surface with outstanding structural features in one step, specifically including the following steps and process conditions:

[0040] Step 1: Magnesium alloy pretreatment

[0041] Sand the surface of the AZ31 magnesium alloy plate to 2000#, ultrasonically clean it with acetone at room temperature for 10 minutes, and dry it with cold air;

[0042] Step 2: Plating solution preparation

[0043] Ce(NO 3 ) 3 ·6H 2 O and octadecanoic acid were dissolved in absolute ethanol, where Ce(NO 3 ) 3 ·6H 2 The concentration of O is 0.01mol / L, and the concentration of octadecanoic acid is 0.1mol / L;

[0044] Step 3: Electrodeposition

[0045] With the polished magnesium alloy sample as the cathode and the cleaned platinum plate as the anode, take 100mL of the electroplating solution prepared in step 2, and electrodeposit it ...

Embodiment 3

[0049] The ZK60 magnesium alloy sheet with a size of 20×20×3 (mm) is subjected to surface pretreatment and electrochemical deposition to obtain a super-hydrophobic surface with outstanding structural features in one step, specifically including the following steps and process conditions:

[0050] Step 1: Magnesium alloy pretreatment

[0051] Sand the surface of the ZK60 magnesium alloy plate to 2000#, ultrasonically clean it with acetone at room temperature for 10 minutes, and dry it with cold air;

[0052] Step 2: Plating solution preparation

[0053] Ce(NO 3 ) 3 ·6H 2 O and dodecanoic acid were dissolved in absolute ethanol, where Ce(NO 3 ) 3 ·6H 2 The concentration of O is 0.2mol / L, and the concentration of dodecanoic acid is 0.05mol / L;

[0054] Step 3: Electrodeposition

[0055] Take the polished magnesium alloy sample as the cathode, and the cleaned platinum plate as the anode, take 100mL of the electroplating solution prepared in step 2, and electrodeposit it for...

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Abstract

The invention belongs to the technical field of surface treatment and modification of magnesium alloys and discloses a method for preparing a super-hydrophobic membrane layer on a surface of a magnesium alloy through a one-step method as well as an alloy and an application of the super-hydrophobic membrane layer. The method comprises the following steps and process conditions: by taking a pretreated magnesium alloy as a negative pole and taking a platinum plate as a positive pole, carrying out electric deposition in electroplate liquid to prepare the super-hydrophobic membrane layer on the surface of the magnesium alloy, wherein the electroplate liquid is a mixed solution of Ce(NO3).6H2O. The method is capable of synchronously preparing coarse structures and low-surface-energy materials needed for a super-hydrophobic structure on the surface of the magnesium alloy in one step to prepare the magnesium alloy with the super-hydrophobic membrane layer. The method for preparing the super-hydrophobic membrane layer on the surface of the magnesium alloy through the one-step method is simple; the treatment process is easy to implement; the solution is environmental friendly in formula and is non-toxic and green; the super-hydrophobic membrane layer can be prepared on the surface of the magnesium alloy in one minute at the soonest; an efficient method is capable of implementing the industrial application of the surface treatment of the magnesium alloy and can be widely applied to the surface treatment of the alloy.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy surface treatment and modification, and in particular relates to a method for preparing a superhydrophobic film layer on the surface of a magnesium alloy by a one-step method, as well as an alloy and an application thereof. Background technique [0002] As the lightest metal structural material at present, magnesium alloy is widely used in aerospace, electronic products, automobile industry, national defense and military industry and other fields. However, magnesium is a highly active metal. Compared with commonly used metal structural materials such as aluminum alloy and steel, it is easily corroded in humid air, sulfur-containing atmosphere and marine atmosphere, which seriously restricts the wide application of magnesium alloys. How to improve the corrosion resistance of magnesium alloys has become a hot research topic today. [0003] Since ancient times, lotus leaves have been known a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/54C25D5/42
CPCC25D3/54C25D5/42
Inventor 康志新刘秦李伟陈德馨张俊逸
Owner SOUTH CHINA UNIV OF TECH
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