Preparation method of corrosion-resistant, antibacterial, anti-biofouling and multifunctional metal-based protective coating

A protective coating and metal-based technology, which is applied in the field of preparation of multifunctional metal-based protective coatings, can solve the problems of metal materials corroding marine organisms, corrosion resistance, antibacterial, anti-biofouling, fouling, etc., and achieve excellent corrosion resistance Effect

Active Publication Date: 2020-10-16
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a corrosion-resistant, anti-bacterial, and anti-biofouling multifunctional metal-based protective coating to solve the problems of corrosion of metal materials and marine biofouling in marine environments or offshore environments.

Method used

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  • Preparation method of corrosion-resistant, antibacterial, anti-biofouling and multifunctional metal-based protective coating
  • Preparation method of corrosion-resistant, antibacterial, anti-biofouling and multifunctional metal-based protective coating

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preparation example Construction

[0026] In the specific implementation process, the preparation method of the corrosion-resistant, anti-bacterial and anti-biofouling multifunctional metal-based protective coating includes the following steps:

[0027] Step 1. Preparation of graphene / nano-silver composite powder: in-situ synthesis of nano-silver on graphene oxide by chemical reaction, reduction to obtain graphene / nano-silver composite powders with different composition ratios, the weight of graphene oxide and silver nitrate raw materials The ratio is 5:1 to 1:5 (preferably 2:1 to 1:2);

[0028] Step 2. Ball milling and mixing: The graphene / nano silver composite powder obtained in step 1 is mixed with metal-based powders by ball milling technology. The metal powders used are Al, Zn and their alloy powders, and the metal powder is mixed with graphene / nano-silver. The weight ratio is 20:1 to 200:1 (preferably 50:1 to 100:1). The conditions of ball milling are: under the protection of inert gas (argon or helium), the ...

Embodiment 1

[0033] In this embodiment, the chemical reaction is used to synthesize nano-silver in situ on graphene oxide (particle size is 5-40nm), the weight ratio of raw material graphene oxide and silver nitrate is 1:1, and the Al powder (particle size is 25~38μm), mixed with graphene / nano-silver composite powder (the particle size of the composite powder is 10~50μm, the mass ratio of graphene and nano-silver composite powder is 1:1), and the ball mill uses 1mm, 3mm, 9mm three stainless steel balls ( The mass ratio of the three stainless steel balls is 1:1:1), the ball-to-material mass ratio is 10:1, the speed is 100rpm, and the weight ratio of Al powder to graphene / nano-silver composite powder is 50:1 to obtain Al / graphite En / nano silver composite powder (composite powder particle size 25 ~ 38μm). The ball-milled composite powder is heat-treated at 250°C for 3h under argon protection, and the aforementioned composite powder is deposited on the Q235 substrate to form a composite coating...

Embodiment 2

[0036] In this embodiment, a chemical reaction is used to synthesize nano-silver in situ on graphene oxide (with a particle size of 5-40 nm), the weight ratio of the raw material graphene oxide and silver nitrate is 1:1, and the Al-Mg alloy powder (The particle size is 25~38μm, the Mg content is 0.5~2.5wt%), mixed with graphene / nanosilver composite powder (the composite powder particle size is 10~50μm, the mass ratio of graphene and nanosilver composite powder is 1:1), The ball mill uses three stainless steel balls of 1mm, 3mm and 9mm (the mass ratio of the three stainless steel balls is 1:1:1), the mass ratio of the ball to material is 15:1, the speed is 150rpm, Al-Mg alloy powder and graphene / nano The weight ratio of the silver composite powder is 50:1 to obtain Al-Mg / graphene / nano silver composite powder (composite powder particle size 25-38 μm). The ball-milled composite powder is heat-treated at 300°C for 3h under argon protection, and the aforementioned composite powder i...

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Abstract

The invention belongs to the field of composite coating preparation, and particularly relates to a preparation method of a corrosion-resistant antibacterial and anti-biofouling multifunctional metal-based protective coating. Through the method, firstly, nano-silver is formed on a graphene oxide-OH functional group through a chemical reaction in an in-situ synthesis mode, and graphene / nano-silver composite powder is obtained through reduction; secondly, the graphene / nano-silver composite powder and metal powder are ball-milled, metal / graphene / nano-silver composite powder is formed, and then stress relief annealing is conducted under inert gas protection; and finally, the composite powder is deposited into the protective coating through a cold spraying technology. Through the method, by adjusting the chemical reaction conditions, the particle size distribution of the metal powder, the weight ratio of metal / graphene / nano-silver and the ball-milling time, the distribution state of the graphene / nano-silver in the metal-based composite coating is changed, and thus the multifunctional metal-based protective coating with good corrosion resistance, antimicrobial property and biofouling property is prepared.

Description

Technical field: [0001] The invention belongs to the field of composite coating preparation, and in particular relates to a preparation method of a corrosion-resistant, anti-bacterial and anti-biological fouling multifunctional metal-based protective coating. Background technique: [0002] At present, major countries in the world are strengthening the development and utilization of marine resources. Metal materials, especially structural steel, are widely used in marine environments as important structural materials. However, the corrosion and biofouling of the marine environment seriously affect the service life of metal materials in the marine environment, so the metal materials in the marine environment must be effectively protected against corrosion and pollution. [0003] At present, metal protective coatings mainly include organic coatings and inorganic metal coatings. Among them, organic coatings use brushing, dipping and other methods, which are low in efficiency, easy to a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/04B22F9/24
CPCB22F9/24C23C24/04
Inventor 熊天英赵志坡唐俊榕邱翔王吉强吴杰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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