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Method for constructing super-hydrophobic coating on surface of copper alloy in situ

A technology of super-hydrophobic coating and copper alloy, which is applied in the direction of metal material coating technology, etc., can solve the problems that the invention has not been reported, and achieve the effect of strong binding force, strong practicability and easy realization

Active Publication Date: 2020-04-14
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 3. The metal substrates for in-situ growth of layered double metal hydroxide films are mostly aluminum alloys, and the invention of in-situ construction of layered double metal hydroxide films on the surface of copper alloys has not been reported yet

Method used

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  • Method for constructing super-hydrophobic coating on surface of copper alloy in situ
  • Method for constructing super-hydrophobic coating on surface of copper alloy in situ
  • Method for constructing super-hydrophobic coating on surface of copper alloy in situ

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Embodiment 1

[0042] In this embodiment, a method for constructing a superhydrophobic coating in situ on the surface of a copper alloy comprises the following steps:

[0043] a. Copper alloy surface pretreatment:

[0044] The aluminum-brass alloy of copper with high aluminum content is used as the base material of the copper alloy, which contains 25.09% zinc, 5.89% aluminum, 1.48% manganese, 0.40% iron, and the rest is copper; the copper alloy is cut and grown, A small piece of copper alloy material with an arbitrary size of 10mm×10mm×5mm in width and height, using SiC sandpaper with a particle size of 240 mesh, 600 mesh, 800 mesh, 2000 mesh, 5000 mesh and 7000 mesh, and using SiC sandpaper of different particle sizes in sequence Grinding, and then polishing the surface of the copper alloy material with a diamond suspension with a particle size of 0.5 μm, then cleaning the surface of the copper alloy material with deionized water, and then ultrasonically cleaning the copper alloy material i...

Embodiment 2

[0053] This embodiment is basically the same as Embodiment 1, especially in that:

[0054] In this embodiment, a method for constructing a superhydrophobic coating in situ on the surface of a copper alloy comprises the following steps:

[0055] a. Copper alloy surface pretreatment:

[0056] The aluminum-brass alloy of copper with high aluminum content is used as the base material of the copper alloy, which contains 25.09% zinc, 5.89% aluminum, 1.48% manganese, 0.40% iron, and the rest is copper; the copper alloy is cut and grown, A small piece of copper alloy material with an arbitrary size of 10mm×10mm×5mm in width and height, using SiC sandpaper with a particle size of 240 mesh, 600 mesh, 800 mesh, 2000 mesh, 5000 mesh and 7000 mesh, and using SiC sandpaper of different particle sizes in sequence Grinding, and then polishing the surface of the copper alloy material with a diamond suspension with a particle size of 0.5 μm, then cleaning the surface of the copper alloy materi...

Embodiment 3

[0069] This embodiment is basically the same as the above-mentioned embodiment, and the special features are:

[0070] a. Copper alloy surface pretreatment:

[0071] Brass is used as the base material, the mass fraction of zinc is 30%, and the rest is copper; the brass is cut into small pieces of brass with any size of 10mm×10mm×5mm in length, width and height, and the particle size is 240 mesh, 600 Mesh, 800 mesh, 2000 mesh, 5000 mesh and 7000 mesh SiC sandpaper, use SiC sandpaper of different particle sizes to polish in turn, and then use a diamond suspension with a particle size of 0.5 μm to polish the surface of the brass, and then use deionized water Clean the brass surface, then ultrasonically clean the brass in ethanol solution and deionized water for 5 minutes, and then dry it with cold air to obtain clean and dry brass with surface pretreatment, and set aside;

[0072] b. The process of in-situ construction of layered double hydroxide / oxide multi-level structure film...

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Abstract

In order to fill in blanks in the prior art, the invention discloses a method for constructing a super-hydrophobic coating on the surface of a copper alloy in situ for the first time. The method comprises the following steps that divalent and trivalent elements (such as Zn and Al) are introduced into the copper alloy, the copper alloy is soaked in a sodium chloride solution, and a layered double-metal hydroxide / oxide multi-stage structured film can be obtained in situ; the micro-structures and the phase types of the synthesized multi-stage structures are determined, and by adjusting the temperature of coating preparation, the multi-stage structures of different densities are constructed; the static contact angle of the surface modified by the perfluorooctyl triethoxysilane is determined; and the electrochemical test is used for representing the corrosion resistance of the copper alloy containing the super-hydrophobic coating, and then the corrosion resistance of the super-hydrophobic coating is proved. The method for constructing the super-hydrophobic coating on the surface of the copper alloy in situ is submitted for the first time, is simple and convenient, energy-saving and environment-friendly, low in cost and strong in controllability, the binding force between the super-hydrophobic coating and a copper alloy matrix is strong, the structure is stable, the practicability isrelatively high, and the method can be widely applied to industrial production.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophobic coating on the surface of a metal material, in particular to a method for in-situ constructing a superhydrophobic coating on the surface of a copper alloy, which is applied to the technical field of preparation of anticorrosion coatings for copper alloy engineering materials and belongs to Metal corrosion and protection technical field. Background technique [0002] Copper alloy is currently the most important type of alloy besides steel and aluminum alloy, and it plays a pivotal role in electrification, electronic information, and ocean development. Copper has a high positive potential and is a corrosion-resistant metal. Its use in the marine field is second only to steel, so it is widely used in industries such as cold and hot water pipelines, oceans and seawater. However, in the oxygen-containing chloride ion solution, copper will form complex ions, and the corrosion will be more se...

Claims

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Application Information

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IPC IPC(8): C23C22/68C23C22/83
CPCC23C22/68C23C22/83
Inventor 姜颖张国腾邢娟娟顾辉
Owner SHANGHAI UNIV
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