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A kind of anti-corrosion coating that can be repaired automatically in acidic environment and its preparation method

An automatic repair and anti-corrosion coating technology, which is applied in the direction of anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problems of easy damage to the integrity of the coating, poor coating compatibility, large amount of nanoparticles, etc., to achieve a solution Compatibility issues, enhanced compatibility, corrosion inhibitory effect

Active Publication Date: 2021-01-29
ZHENGZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of nanoparticles used in the above-mentioned anti-corrosion coating is relatively large, which has poor compatibility with the coating and easily destroys the integrity of the coating.

Method used

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  • A kind of anti-corrosion coating that can be repaired automatically in acidic environment and its preparation method
  • A kind of anti-corrosion coating that can be repaired automatically in acidic environment and its preparation method
  • A kind of anti-corrosion coating that can be repaired automatically in acidic environment and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] Schematic diagram of the preparation of acid-responsive mesoporous silica and the chemical structures of the main reagents such as figure 1 shown.

[0054] A self-healing anti-corrosion coating in an acidic environment, comprising the following parts

[0055] (1) Acid-responsive mesoporous silica loaded with corrosion inhibitor 0.5-5 parts by weight

[0056] (2) Cured resin 95-99.5 parts by weight

[0057] The resin cured product is formed by curing epoxy resin, epoxy curing agent and water.

[0058] The epoxy resin is bisphenol A type epoxy resin, and the epoxy curing agent is polyetheramine D230 and n-decylamine.

[0059] The cured resin is a cured polyurethane formed by curing a hydroxyl-containing resin, an isocyanate curing agent and water.

[0060] The acid-responsive mesoporous silica loaded with a corrosion inhibitor is composed of a corrosion inhibitor and an acid-responsive mesoporous silica, the corrosion inhibitor is located in the pore structure of the ...

Embodiment 1

[0090] A preparation method for an anti-corrosion coating that can be automatically repaired in an acidic environment, comprising the following steps:

[0091] (1) Preparation of mesoporous silica as a nano container;

[0092] (1a): Dissolve 10g of dodecyltrimethylammonium bromide and 5g of sodium hydroxide in 5L of water to obtain an alkaline aqueous solution; slowly drop 50mL of tetraethyloxysilane into the above alkaline aqueous solution, and react at a constant temperature under stirring 4h, the reaction temperature was 70°C; centrifuged, washed and dried to obtain mesoporous silica microspheres MSN;

[0093](1b): Disperse mesoporous silica microspheres MSN in toluene solution, add silane coupling agent-glycidyl ether propyl trimethoxysilane drop by drop, reflux reaction for 12h, centrifuge, wash and dry to obtain ring Oxygen-modified mesoporous silica microspheres (MSN-epoxy);

[0094] The weight ratio of mesoporous silica microspheres to glycidyl ether propyl trimethox...

Embodiment 2

[0104] A preparation method for an anti-corrosion coating that can be automatically repaired in an acidic environment, comprising the following steps:

[0105] A method for preparing an automatically repairable anti-corrosion coating, comprising the following steps:

[0106] (1) Preparation of mesoporous silica as a nano container;

[0107] (1a): Dissolve 15g of dodecyltrimethylammonium bromide and 6g of sodium hydroxide in 5L of water to obtain an alkaline aqueous solution; slowly drop 100mL of tetraethyloxysilane into the above alkaline aqueous solution, and react at a constant temperature under stirring 4.5h, the reaction temperature is 75°C; centrifuge, wash and dry to obtain mesoporous silica microspheres MSN;

[0108] (1b): Disperse mesoporous silica microspheres MSN in toluene solution, add silane coupling agent-glycidyl ether propyl trimethoxysilane drop by drop, reflux reaction for 13h, centrifuge, wash and dry to obtain ring Oxygen-modified mesoporous silica micros...

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Abstract

The invention provides an anticorrosion coating capable of being automatically repaired in an acidic environment. The anticorrosion coating is prepared from the following components in parts by weight: 0.5 to 5 parts of acid-responsive mesoporous silicon dioxide loaded with a corrosion inhibitor and 95 to 99.5 parts of a resin solidified substance. The anticorrosion coating provided by the invention can be automatically repaired in the acidic environment. After the coating is damaged, a local microenvironment is changed; a high polymer N-tert-butylcarbonyl in an acid-responsive mesoporous silicon dioxide shell layer loaded with the corrosion inhibitor in the coating is hydrolyzed and removed under the stimulation of external acid; the high polymer of the shell body has hydrophobic-hydrophilic conversion, so that a mesoporous silicon dioxide pore channel is exposed and the loaded corrosion inhibitor is rapidly released to form a protection film to effectively inhibit corrosion.

Description

technical field [0001] The invention belongs to the technical field of polymer anti-corrosion coating materials, and in particular relates to an anti-corrosion coating that can be automatically repaired in an acidic environment and a preparation method thereof. Background technique [0002] Corrosion of metal materials pervades all fields of the national economy, causing huge waste of resources and economic losses. The total annual corrosion cost in my country exceeds 2.1 trillion yuan, accounting for about 5% of the gross national product. [0003] Among all anti-corrosion measures, anti-corrosion coating is the most widely used due to its simple operation, wide application and low cost. Organic anti-corrosion coatings isolate the metal substrate from corrosive media such as moisture, oxygen, and ions through physical shielding, and inhibit the corrosion anodic and cathodic reactions, thereby preventing the occurrence of corrosion electrochemical reactions. However, during...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08
CPCC09D5/08C09D163/00C08K9/04C08K7/26C08K9/12C08K5/3475
Inventor 陈燕敏陈凌霞王玲秦会安王鑫陈建军孙海杰
Owner ZHENGZHOU NORMAL UNIV
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