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Resistance-variable ZnO corrosion-resistant film and preparation method thereof

A corrosion-resistant film and coating technology, applied in liquid chemical plating, metal material coating process, coating and other directions to achieve the effects of slowing down oxidation, reducing corrosion rate, and slowing down diffusion rate

Pending Publication Date: 2022-03-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no one has used this semiconductor material with resistive switching properties for corrosion protection of steel

Method used

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  • Resistance-variable ZnO corrosion-resistant film and preparation method thereof
  • Resistance-variable ZnO corrosion-resistant film and preparation method thereof
  • Resistance-variable ZnO corrosion-resistant film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Weigh 2.195g of zinc acetate dihydrate and put it in a beaker, add 100ml of ethylene glycol methyl ether. Use a magnetic stirrer to stir, and it can be observed that a turbid solution is formed; after adding ethanolamine in the same molar amount as zinc acetate dihydrate, it can be observed that the turbid solution becomes clear. Stirring was continued for 12h. After aging for more than 24 hours at room temperature, a stable 0.1mol / L zinc acetate sol was obtained.

[0033] (2) 304 stainless steel is used as the base. Use different types of sandpaper to grind in sequence, polish after grinding, clean with deionized water, and ultrasonically in alcohol for 15 minutes, dry and set aside.

[0034] (3) The static spin coating method is used to coat the film, and the rotation speed is controlled at 1000r / min. After the spin coating is completed, put it into an oven at 150° C. for 15 minutes to dry. Repeat the above operation for each layer. A total of 12 layers were s...

Embodiment 2

[0037] (1) Weigh 6.585g of zinc acetate dihydrate and put it in a beaker, add 100ml of ethylene glycol methyl ether. Use a magnetic stirrer to stir, and it can be observed that a turbid solution is formed; after adding ethanolamine in the same molar amount as zinc acetate dihydrate, it can be observed that the turbid solution becomes clear. Stirring was continued for 12h. After aging for more than 24 hours at room temperature, a stable 0.3 mol / L zinc acetate sol was obtained.

[0038] (2) 304 stainless steel is used as the base. Use different types of sandpaper to grind in turn, polish after grinding, clean with deionized water, ultrasonic in alcohol for 18min, dry and set aside.

[0039] (3) Static spin coating method is used to coat the film, and the speed is controlled at 1500r / min. After the spin coating is completed, it is dried in an oven at 130°C for 15 minutes. Repeat the above operation for each layer. A total of 12 layers were spin-coated.

[0040] (4) After the...

Embodiment 3

[0042] (1) Weigh 10.975g of zinc acetate dihydrate and put it in a beaker, add 100ml of ethylene glycol methyl ether. Use a magnetic stirrer to stir, and it can be observed that a turbid solution is formed; after adding ethanolamine in the same molar amount as zinc acetate dihydrate, it can be observed that the turbid solution becomes clear. Stirring was continued for 12h. After aging for more than 24 hours at room temperature, a stable 0.5 mol / L zinc acetate sol was obtained.

[0043] (2) 304 stainless steel is used as the base. Use different types of sandpaper to grind in turn, polish after grinding, clean with deionized water, ultrasonic in alcohol for 17min, dry and set aside.

[0044] (3) Static spin coating method is used to coat the film, and the speed is controlled at 2000r / min. After the spin coating is completed, it is put into an oven at 100° C. for 11 minutes to dry. Repeat the above operation for each layer. A total of 12 layers were spin-coated.

[0045] (4)...

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Abstract

The invention discloses a resistance-variable ZnO corrosion-resistant film and a preparation method thereof, and the preparation method comprises the following steps: firstly preparing sol of zinc oxide and magnesium-doped zinc oxide, spraying the sol on a substrate, and calcining to prepare a ZnO film and a Mg-doped ZnO resistance-variable film (MgxZn1-xO); according to the technical scheme, the diffusion speed of oxygen to the metal surface is greatly reduced by means of the oxygen adsorption and combination capacity of the resistive film, and therefore oxidation is slowed down; and the oxygen vacancy content of the film can be controlled by changing the doping concentration of Mg, so that the corrosion-resistant film with different resistance values can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a resistive anti-corrosion protective film, in particular to a ZnO film containing oxygen vacancy defects, and the resistance value of the film can be changed by controlling the preparation conditions. Background technique [0002] Steel is generally in a medium environment during its service, and the main form of corrosion of steel in the medium is electrochemical corrosion. In essence, the principle of electrochemical corrosion of steel is that the anode of iron dissolves Fe→Fe 2+ +2e - Depolarize with oxygen O 2 +2H 2 O+4e - →4OH - or hydrogen depolarizes 2H + +2e - →H 2 The composition of the process, so that a large amount of oxides are formed on the surface of the steel, resulting in the decline of various properties of the steel, resulting in a large amount of property loss. Rust layer on steel surface, including iron oxide Fe(OH) 2 , Fe(OH) 3 , α-FeOOH, β-FeOOH, γ-FeOOH and δ-FeOOH, et...

Claims

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Application Information

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IPC IPC(8): C23C18/12
CPCC23C18/1216C23C18/1254C23C18/1241
Inventor 王吉会赵凤珠胡文彬
Owner TIANJIN UNIV
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