Oxidation-reduction responded self-repairing anticorrosive coating and preparation method thereof

An anti-corrosion coating and self-healing technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of shortening the path and the research on self-healing coatings is still in the blank stage, and achieve the effect of rapid response, good application prospects and sufficient protection

Inactive Publication Date: 2017-06-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the most significant change in the metal corrosion process is the change of electron gain and loss in the redox process. The anodic reaction of metal corrosion produces metal ions and free electrons. At present, there is no mechanism to trigger the release of corrosion inhibitors based on the change of electron gain and loss. For redox The study of responsive self-healing coatings is still in the blank stage, and this material has great potential in the field of corrosion protection applications
[0006] At the same time, according to the idea that the corrosion inhibitor needs to reach the damaged metal area quickly, making the corrosion inhibitor carrier close enough to the metal surface can greatly shorten the path for the corrosion inhibitor molecules to migrate to the damaged metal surface, but there is no research yet can achieve this goal

Method used

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  • Oxidation-reduction responded self-repairing anticorrosive coating and preparation method thereof
  • Oxidation-reduction responded self-repairing anticorrosive coating and preparation method thereof
  • Oxidation-reduction responded self-repairing anticorrosive coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of magnetic Fe 3 o 4 / Mesoporous silica nanocontainer

[0036] Dissolve 1.08 g of ferric chloride hexahydrate and 3.65 g of sodium oleate in 8 mL of ethanol, 6 mL of distilled water, and 14 mL of n-hexane, heat the reaction system to 70°C and keep it warm for 4 hours, then separate the upper organic phase, Fully wash with 200 mL of distilled water, then rotatively evaporate the organic phase to remove the n-hexane solvent, add 40 mL of octadecene to the obtained waxy solid, and add 0.886 g of oleic acid, heat to 320 ° C, and keep it warm for 30 minutes. , the product was added to 200mL ethanol, the product was precipitated, and oleic acid-stabilized ferric oxide nanoparticles were obtained.

[0037] Weigh 5 mg of Fe3O4 nanoparticles, dissolve in 2 mL of chloroform, then add this chloroform solution into 50 mL of distilled water, and then add 0.4 g of cetyltrimethylammonium bromide Ammonium bromide and 0.3 mL of 2 mol / L sodium hydroxide solution were vi...

Embodiment 2

[0049] 1. Preparation of magnetic Fe 3 o 4 / Mesoporous silica nanocontainer

[0050] Dissolve 1.08 g of ferric chloride hexahydrate and 3.65 g of sodium oleate in 8 mL of ethanol, 6 mL of distilled water, and 14 mL of n-hexane, heat the reaction system to 70°C and keep it warm for 4 hours, then separate the upper organic phase, Fully wash with 200 mL of distilled water, then rotatively evaporate the organic phase to remove the n-hexane solvent, add 40 mL of octadecene to the obtained waxy solid, and add 0.886 g of oleic acid, heat to 320 ° C, and keep it warm for 30 minutes. , the product was added to 200mL ethanol, the product was precipitated, and oleic acid-stabilized ferric oxide nanoparticles were obtained.

[0051] Weigh 5 mg of Fe3O4 nanoparticles, dissolve in 2 mL of chloroform, then add this chloroform solution into 50 mL of distilled water, and then add 0.4 g of cetyltrimethylammonium bromide Ammonium bromide and 0.3 mL of 2 mol / L sodium hydroxide solution were vi...

Embodiment 3

[0065] 1. Preparation of magnetic Fe 3 o 4 / Mesoporous silica nanocontainer

[0066] Dissolve 1.08 g of ferric chloride hexahydrate and 3.65 g of sodium oleate in 8 mL of ethanol, 6 mL of distilled water, and 14 mL of n-hexane, heat the reaction system to 70°C and keep it warm for 4 hours, then separate the upper organic phase, Fully wash with 200 mL of distilled water, then rotatively evaporate the organic phase to remove the n-hexane solvent, add 40 mL of octadecene to the obtained waxy solid, and add 0.886 g of oleic acid, heat to 320 ° C, and keep it warm for 30 minutes. , the product was added to 200mL ethanol, the product was precipitated, and oleic acid-stabilized ferric oxide nanoparticles were obtained.

[0067] Weigh 5 mg of Fe3O4 nanoparticles, dissolve in 2 mL of chloroform, then add this chloroform solution into 50 mL of distilled water, and then add 0.4 g of cetyltrimethylammonium bromide Ammonium bromide and 0.3 mL of 2 mol / L sodium hydroxide solution were vi...

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Abstract

The invention discloses a high-sensitivity oxidation-reduction responded self-repairing anticorrosive coating and belongs to the technical field of metal anticorrosive coatings. The high-sensitivity oxidation-reduction responded self-repairing anticorrosive coating is prepared from an organic-inorganic hybrid sol-gel coating and a magnetic intelligent nano container doped into the organic-inorganic hybrid sol-gel coating. A preparation process comprises the following steps: preparing the magnetic intelligent nano container; dispersing the magnetic intelligent nano container into organic-inorganic hybrid sol-gel; coating the surface of a magnesium alloy substrate with a mixture to form the high-sensitivity oxidation-reduction responded self-repairing anticorrosive coating. By adopting the high-sensitivity oxidation-reduction responded self-repairing anticorrosive coating provided by the invention, the dense degree of a coating substrate can be improved, and corrosion inhibitor molecules can be actively and rapidly released when the coating is damaged and a metal substrate is exposed in a corrosive environment and the corrosion inhibitor molecules are adsorbed on the surface of the metal substrate to realize a self-repairing effect; the high-sensitivity oxidation-reduction responded self-repairing anticorrosive coating is an anticorrosive coating with good performances and application potential.

Description

technical field [0001] The invention relates to a metal anticorrosion coating and a preparation method thereof, specifically an oxidation-reduction response self-repairing anticorrosion coating and its preparation method and application, belonging to the technical field of metal anticorrosion. Background technique [0002] Magnesium alloys are widely used in aerospace, transportation and other industrial sectors due to their advantages such as high specific strength, good heat dissipation, low density, and excellent casting performance. They play an important role in realizing the long-term goals of equipment lightweight, energy saving and emission reduction. However, due to the active chemical properties of magnesium, the thermodynamic stability of magnesium alloy materials is poor, and there are often hidden dangers of corrosion damage in practical applications. This feature limits the further wide application of magnesium alloys. So far, the design and development of effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/07C09D1/00C09D5/08C23F11/12C23F11/14C23F11/16C23F11/10
CPCC08K3/22C08K7/26C08K9/04C08K13/06C08K2003/2275C09D1/00C09D5/08C09D183/06C23F11/10C23F11/12C23F11/14C23F11/163
Inventor 傅佳骏丁晨迪徐雅民
Owner NANJING UNIV OF SCI & TECH
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