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

A protective coating and anti-biological technology, applied in the field of preparation of multi-functional metal-based protective coatings, can solve the problems of corrosion of marine organisms, fouling, corrosion resistance, antibacterial and anti-biological fouling of metal materials, and achieve excellent corrosion resistance. Effect

Active Publication Date: 2019-01-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

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 and anti-biofouling multifunctional metal-based protective coating
  • Preparation method of corrosion-resistant antibacterial and anti-biofouling multifunctional metal-based protective coating
  • Preparation method of corrosion-resistant antibacterial and anti-biofouling 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, anti-biofouling and anti-biofouling multifunctional metal-based protective coating comprises 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 powder with different composition ratios, the weight of graphene oxide and silver nitrate raw materials The ratio is 5:1~1:5 (preferably 2:1~1:2);

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

Embodiment 1

[0033] In this embodiment, chemical reaction is used to synthesize nano-silver (with a particle size of 5-40nm) in situ on graphene oxide, the weight ratio of raw material graphene oxide and silver nitrate is 1:1, and the Al powder (with a particle size of 25~38μm), mixed with graphene / nano-silver composite powder (the particle size of composite powder is 10-50μm, the mass ratio of graphene and nano-silver composite powder is 1:1), and three kinds of stainless steel balls of 1mm, 3mm and 9mm are used for ball milling ( The mass ratio of three kinds of stainless steel balls is 1:1:1), the mass ratio of ball to material is 10:1, the rotating speed is 100rpm, and the weight ratio of Al powder to graphene / nano-silver composite powder is 50:1 to obtain Al / graphite Alkene / nano-silver composite powder (composite powder particle size 25-38μm). The composite powder after ball milling was heat-treated at 250°C for 3 hours under the protection of argon, and the composite powder was depos...

Embodiment 2

[0036]In this example, a chemical reaction is used to synthesize nano-silver (with a particle size of 5-40nm) in situ on graphene oxide, the weight ratio of raw material graphene oxide and silver nitrate is 1:1, and the Al-Mg alloy powder (particle size is 25~38 μm, Mg content is 0.5~2.5wt%), mixed with graphene / nano-silver composite powder (composite powder particle size is 10~50 μm, the mass ratio of graphene and nano-silver composite powder is 1:1), The ball mill adopts three kinds of stainless steel balls of 1mm, 3mm and 9mm (the mass ratio of the three kinds of 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, and the Al-Mg / graphene / nano-silver composite powder (composite powder particle size 25-38 μm) is obtained. The composite powder after ball milling was heat-treated at 300°C for 3 hours under the protection of argon, and th...

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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, antibacterial, and anti-biological fouling multifunctional metal-based protective coating. Background technique: [0002] At present, all major countries in the world are strengthening the development and utilization of marine resources. Metal materials, especially structural steel, are widely used in the marine environment 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 it is necessary to effectively protect the metal materials in the marine environment from corrosion and antifouling. [0003] At present, metal protective coatings mainly include organic coatings and inorganic metal coatings, among which: organic coatings use methods such as brushing and dipping, which have low...

Claims

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Application Information

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Patent Type & Authority Applications(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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