An anti-biofouling coating based on a primary cell with a micron-sized bimetallic laminate structure and its preparation method

A double metal layer, anti-biological technology, applied in metal material coating process, metal processing equipment, coating, etc., can solve the problems of short service life, limited anti-fouling effect, toxic raw materials of anti-biofouling coating, etc. , to achieve the effect of avoiding galvanic corrosion, preventing passivation, long-term stability and anti-biofouling

Active Publication Date: 2022-01-25
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an anti-biofouling coating based on a micron-sized bimetallic laminate structure primary battery and its preparation method, which can address the toxicity of existing anti-biofouling coating raw materials, short service life, and anti-fouling properties. Technical problems with limited effect

Method used

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  • An anti-biofouling coating based on a primary cell with a micron-sized bimetallic laminate structure and its preparation method
  • An anti-biofouling coating based on a primary cell with a micron-sized bimetallic laminate structure and its preparation method
  • An anti-biofouling coating based on a primary cell with a micron-sized bimetallic laminate structure and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Copper powder with a particle size distribution of 30-100 microns and titanium powder with a particle size distribution of 15-75 microns are used as raw materials, and the two powders are fully mixed with a drum mixer, and the volume content of the copper powder is 50 %, the drum speed is set to 60rpm, the powder mixing time is 60 minutes, and the mixed powder is used as the spraying material. TC4 titanium alloy is used as the base material, and the surface of the base material is cleaned and roughened by sandblasting process before coating preparation, and the surface roughness after treatment is Ra 4.5-6.5 microns. Atmospheric plasma spraying is used for coating preparation, the mixed gas of argon and hydrogen is used as the plasma gas, nitrogen is used as the powder feeding gas, the spraying power is 32kW, the spraying distance is 100mm, the powder feeding rate is 40g / min, and the moving speed of the spray gun is 500mm / s, the thickness of the coating is 0.3mm.

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Embodiment 2

[0043] Copper powder with a particle size distribution of 10-50 microns and stainless steel with a particle size distribution of 15-45 microns are used as raw materials, and the two powders are fully mixed with a drum mixer. The volume ratio of copper powder and stainless steel powder The ratio is 1:4, the rotation speed of the drum is set to 60rpm, the powder mixing time is 60 minutes, and the mixed powder is used as the spraying raw material. With stainless steel as the base material, the surface of the base material is cleaned and roughened by sand blasting process before coating preparation, and the surface roughness after treatment is Ra 4.5-6.5 microns. The coating is prepared by cold spraying, nitrogen is used as the working gas, the gas temperature is 500°C, the gas pressure is 3.0MPa, the spraying distance is 35mm, the powder feeding rate is 100g / min, and the gun speed is 300mm / s. Thickness 2.5mm.

[0044] The result is as Figure 4 As shown in (a) and (b), the char...

Embodiment 3

[0046] Copper powder with a particle size distribution of 15-50 microns and tin bronze powder with a particle size distribution of 15-45 microns are used as raw materials, and the two powders are fully mixed with a drum mixer. The volume ratio is 1:1, the rotation speed of the drum is set to 60rpm, and the powder mixing time is 60 minutes. The mixed powder is used as the spraying raw material. The marine steel is used as the substrate. Before the coating is prepared, the surface of the substrate is cleaned and roughened by sandblasting. The surface roughness after treatment is Ra 4.5-6.5 microns. Supersonic flame spraying is used for coating preparation, oxygen and kerosene are used as working fuels, nitrogen is used as powder feeding gas, the spraying power is 32kW, the spraying distance is 350mm, the powder feeding rate is 75g / min, and the moving speed of the spray gun is 1000mm / s. The thickness of the coating is 0.2 mm.

[0047] The result is as Image 6 As shown, there a...

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Abstract

The invention discloses an anti-biofouling coating based on a primary cell with a micron-sized double metal layer structure and a preparation method thereof. The coating is formed by overlapping two metal material layers with a micron-scale thickness, one of The metal layer must be copper or copper alloy, and the other metal layer is a metal material with higher electronegativity than copper or copper alloy. When the coating is immersed in a conductive aqueous solution, the copper or copper alloy layer on the coating surface forms a primary battery with another metal layer, and the copper or copper alloy is oxidized to produce copper ions, which can poison and kill organisms and achieve anti-biological pollution The release rate of copper ions can be regulated by the ratio of copper or copper alloy in the coating. The anti-biofouling coating has the advantages of long service life, good anti-fouling effect, large-area preparation, self-polishing effect and the like.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and in particular relates to an anti-biofouling coating based on a micron-sized double metal layer structure primary battery and a preparation method thereof. Background technique [0002] Biofouling refers to the attachment of microorganisms, plants or animals such as oysters and vines in the ocean to the surface of immovable or movable man-made objects such as offshore drilling platforms, platforms, monitoring equipment, ships, etc., resulting in rapid degradation of the functions of the above objects, and then completely lost. Taking marine ships as an example, the thickness of oysters and vines attached to the bottom and side of the ship can reach more than 10 cm. Studies have shown that biofouling can increase the resistance of the ship by more than 60%, resulting in a maximum reduction of 10% in speed and fuel consumption. The rate increases by more than 40%, and it can also c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/16C09D1/00C23C4/06C23C4/129C23C4/134C23C24/04B22F1/052
Inventor 雒晓涛田佳佳李长久
Owner XI AN JIAOTONG UNIV
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