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Non-wettability coating suitable for resisting high-temperature aluminum permeation and preparation method of non-wettability coating

A non-wetting, high temperature resistant technology, applied in coating, metal material coating process, vacuum evaporation coating, etc., can solve problems such as failure, failure of furnace and steel shell, etc.

Pending Publication Date: 2022-06-28
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problem currently existing in the process of electrolytic aluminum is that the molten aluminum solution at high temperature will react with the surface metal materials such as stainless steel on the wall of the electrolytic furnace and the aluminum core anode claw of the steel shell, resulting in the failure of the furnace and the steel shell. How to solve the problem due to aluminum The current key problem is that the liquid penetrates and reacts with the steel shell, etc., leading to its failure.

Method used

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  • Non-wettability coating suitable for resisting high-temperature aluminum permeation and preparation method of non-wettability coating
  • Non-wettability coating suitable for resisting high-temperature aluminum permeation and preparation method of non-wettability coating
  • Non-wettability coating suitable for resisting high-temperature aluminum permeation and preparation method of non-wettability coating

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preparation example Construction

[0024] The present invention also provides a method for preparing a non-wetting coating suitable for high temperature aluminum penetration, the method specifically comprises the following steps:

[0025] A dense 50-100 micron thick bonding layer alloy is prepared on the surface of the alloy substrate by atmospheric plasma spraying. Even if the prepared alloy coating has a certain porosity, due to the layered structure characteristics, the pores are not connected to each other. The layer has excellent anti-aluminum propagation effect;

[0026] Prevent the bonding layer from being in the air for a period of time, because it is rich in aluminum, a dense aluminum oxide film will be formed on the surface as an anti-oxidation layer, thereby further protecting the alloy matrix;

[0027] A dense, non-wetting surface ceramic layer with a columnar crystal structure with a thickness of 100-500 microns is prepared on the surface of the bonding layer by electron beam physical vapor deposit...

Embodiment

[0051] A dense 50-100 μm thick bonding layer was prepared on the surface of the alloy substrate by atmospheric plasma spraying. The atmospheric plasma spraying process parameters were as follows: the power of the spray gun was 35~40 kW, the distance of the spray gun was 120~200 mm, and the argon and hydrogen The gas flow rate was 5~8 slpm, 6~12 slpm, the feed rate was 35~60 g / min, the spray gun speed was 100~300 mm / s, and the spraying time was 1~3 min; After a period of time, due to its rich aluminum, a dense aluminum oxide film will be formed on the surface as an anti-oxidation layer to further protect the alloy matrix; the thickness of 100-500 microns is prepared on the surface of the bonding layer by electron beam physical vapor deposition. A dense, non-wetting ceramic layer with a columnar crystal structure that resists aluminum penetration. The parameters of electron beam physical meteorological deposition are: the vacuum degree of vacuum treatment is less than 5×10 -3 ...

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Abstract

The invention discloses a non-wettability coating suitable for resisting high-temperature aluminum permeation and a preparation method of the non-wettability coating. The non-wettability coating suitable for resisting high-temperature aluminum permeation is composed of an alloy matrix, a bonding layer and a surface ceramic layer in sequence. Wherein the thickness range of the bonding layer is 50-100 microns; the thickness of the surface ceramic layer ranges from 100 micrometers to 500 micrometers. According to the coating and the preparation method of the coating, a non-infiltrating coating material resistant to high-temperature aluminum permeation is obtained, so that parts such as a tank wall and a steel shell aluminum core anode claw are prevented from being in contact reaction with an aluminum solution in the aluminum electrolysis process, the service life of related equipment is prolonged, the production cost is saved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature protective coatings and preparations thereof, and in particular relates to a non-wetting coating suitable for high-temperature aluminum penetration and a preparation method thereof. Background technique [0002] Aluminum alloy materials have huge applications in daily life and national defense and military industries, such as aluminum alloy windows, high-temperature structural parts and aircraft surface materials. The extraction and smelting of metallic aluminum is the first step in the manufacture of high-performance aluminum alloys. At present, metallic aluminum is mainly obtained by electrolysis of aluminum. Electrolytic aluminum is aluminum obtained by electrolysis. Modern electrolytic aluminum industrial production adopts cryolite-alumina molten salt electrolysis method. Molten cryolite is the solvent, alumina is used as the solute, the carbon body is used as the anode, and the alu...

Claims

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Application Information

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IPC IPC(8): C23C4/073C23C4/134C23C4/18C23C14/08C23C14/30C04B35/10C04B35/495C04B35/50C04B35/505C04B35/622C04B35/66C25C3/08C25C3/12
CPCC23C4/134C23C4/18C23C4/073C23C14/30C23C14/083C04B35/495C04B35/50C04B35/505C04B35/10C04B35/62222C04B35/66C25C3/08C25C3/12C04B2235/3224C04B2235/3225C04B2235/3217C04B2235/3251
Inventor 冯晶陈琳王建坤
Owner KUNMING UNIV OF SCI & TECH
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