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Preparation method of corrosion-resistant wave-absorbing coating containing core-shell structure type magnetic absorber

A technology of wave-absorbing coating and core-shell structure, which is applied in the direction of radiation-absorbing coatings, coatings, and devices for coating liquid on the surface, which can solve the problems of magnetic absorbent settlement, uneven distribution of coatings, and high maintenance costs. Achieve the effects of improving high corrosion resistance, avoiding poor adhesion, and improving overall uniformity

Active Publication Date: 2022-03-04
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the use of graphene and other inorganic nano-materials to coat magnetic particles, the shielding properties produce corrosion resistance effects, but it is easy to cause poor blendability with organic resin matrix, increase the difficulty of coating blending process, and high maintenance costs. The present invention proposes a Preparation method of corrosion-resistant wave-absorbing coating containing core-shell structure type magnetic absorber
The polystyrene-coated magnetic absorbent is prepared by in-situ polymerization to solve the compatibility problem; the spray gun spraying-surface drying-spraying process is used to volatilize the excess solvent and the coating is pre-cured to solve the problem of brushing and simple Problems such as uneven distribution of paint and sedimentation of magnetic absorbents during the spraying process

Method used

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  • Preparation method of corrosion-resistant wave-absorbing coating containing core-shell structure type magnetic absorber

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preparation example Construction

[0027] A method for preparing a corrosion-resistant wave-absorbing coating containing a core-shell structure type magnetic absorber, comprising the following steps:

[0028] Step 1. Select 100g of polystyrene-coated magnetic absorber, 20-1000g of resin and curing agent, and 200-10000ml of organic solvent and pour them into the container. At room temperature, use mechanical stirring to mix, and the coating is obtained after mixing evenly;

[0029] Step 2. Put the paint in the watering can, spray it on the base plate with an air pressure spray gun, the nozzle diameter is 1.5-2.2mm, the spraying air pressure is set at 0.5-2.4 bar, the spraying distance is 10-21cm, and the spray width is 30cm;

[0030] Step 3. After spraying once, place it in a high-temperature curing box for surface drying. The surface drying temperature is set at 40-100°C, and the surface drying time is 30-600s;

[0031] Step 4. Repeat step 3 spraying-surface drying-spraying process to obtain a wave-absorbing co...

Embodiment 1

[0043] Test materials: Select polystyrene-coated magnetic absorber, resin and curing agent, organic solvents such as xylene and acetone.

[0044] The specific implementation steps are as follows:

[0045] Step 1. Select 100g of polystyrene-coated carbonyl iron-type magnetic absorber with a size of 200μm, pour 1000g of epoxy resin and curing agent, and 10,000ml of xylene and other solvents into the container. Stirring and mixing, the mechanical stirring rate is 100r / min, the stirring time is 8h, and the coating is obtained after mixing evenly;

[0046] Step 2. Put an appropriate amount of paint in a 500ml watering can, spray it on the aluminum plate with an air pressure spray gun, the nozzle diameter is 1.5mm, the spraying air pressure is set to 0.5 bar, the spraying distance is 10cm, and the spray width is about 30cm;

[0047] Step 3. After spraying once, place it in a high-temperature curing box for surface drying. The surface drying temperature is set at 100°C, and the surf...

Embodiment 2

[0052] Test materials: Select polystyrene-coated magnetic absorber, resin and curing agent, organic solvents such as xylene and acetone.

[0053] The specific implementation steps are as follows:

[0054]Step 1. Select 100g of polystyrene-coated carbonyl iron-type magnetic absorbent, the size of which is 1μm, pour 20g of epoxy resin and curing agent, 200ml of xylene and other solvents into the container, and at room temperature, use mechanical Stir and mix, the mechanical stirring rate is 200r / min, the stirring time is 0.5h, and the coating is obtained after mixing evenly;

[0055] Step 2. Put an appropriate amount of paint in a 500ml watering can, spray it on the aluminum plate with an air pressure spray gun, the nozzle diameter is 2.2mm, the spraying air pressure is set at 2.4 bar, the spraying distance is 21cm, and the spray width is about 30cm;

[0056] Step 3. After spraying once, place it in a high-temperature curing box for surface drying. The surface drying temperatur...

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Abstract

The invention relates to the technical field of wave-absorbing coatings, and provides a method for preparing a corrosion-resistant wave-absorbing coating containing a core-shell structure type magnetic absorber. The new preparation method of the wave-absorbing coating containing the core-shell structure magnetic absorber developed by the present invention can improve the high corrosion resistance of the radar wave-absorbing coating, and the polystyrene-coated magnetic absorber is prepared by the in-situ polymerization method. The polystyrene shell is similarly compatible with organic resins to solve the compatibility problem; the spray gun spraying-surface drying-spraying process is adopted to volatilize the excess solvent and pre-cure the coating, thereby improving the overall uniformity of the coating. Effectively solve the problems of uneven paint distribution and magnetic absorbent sedimentation in the process of brushing and simple spraying, and the surface density of the obtained wave-absorbing coating is ≤3kg / m 2 , the thickness is adjustable from 0.1‑10mm.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing coatings, in particular to a method for preparing a corrosion-resistant wave-absorbing coating containing a core-shell structure type magnetic absorber. Background technique [0002] As my country's fighters move from land to sea, the requirements for the corrosion resistance of radar absorbing coatings are getting higher and higher. The use of magnetic absorbent coating is an effective way to achieve corrosion resistance of absorbing coatings. At present, my country's carrier-based aircraft is facing: high-humidity, high-salt-fog marine environment; high dispatch rate of fighter jets; It cannot effectively improve the corrosion resistance of the magnetic absorber that acts as a wave absorber. The magnetic absorbent coating can directly improve the corrosion resistance of the magnetic absorbent. In the previous magnetic absorbent coating scheme, inorganic nanomaterials such as graphene and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/00B05D7/24B05D7/14B05D3/02C09D5/32
CPCB05D5/00B05D7/24B05D7/14B05D3/0254C09D5/32B05D2504/00B05D2503/00B05D2518/10B05D2601/20B05D2601/28B05D2202/25B05D2202/35C08K9/10C08K3/08C08K2201/01
Inventor 张行韦国科尹贻超高路
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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