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A kind of anticorrosion coating and its preparation and application method and a kind of composite material

A technology of composite materials and anti-corrosion coatings, applied in the field of materials, can solve problems such as waste of corrosion inhibitors, reduction of anti-corrosion properties of anti-corrosion coatings, corrosion of metal substrates, etc., and achieve the effect of improving corrosion inhibition efficiency and anti-corrosion effect

Active Publication Date: 2019-07-05
YUGREAT (BEIJING) INTERNATIONAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when traditional anti-corrosion coatings are used, some metal substrates are still corroded, the pH of the metal substrate is constantly changing, and the pH of the cathode is constantly increasing.
Because traditional anti-corrosion coatings cannot adjust the concentration of corrosion inhibitors in time according to the change of environmental pH, at the initial stage of the use of traditional anti-corrosion coatings, the concentration of corrosion inhibitors is too high, which will cause waste of corrosion inhibitors and damage the environment. As time goes by, the concentration of corrosion inhibitors in traditional anti-corrosion coatings gradually decreases. In the later period of traditional anti-corrosion coatings, if the concentration of corrosion inhibitors is too low, the anti-corrosion performance of anti-corrosion coatings will be seriously reduced.
[0005] It can be seen that during the use of traditional anti-corrosion coatings, due to the gradual decrease in the concentration of corrosion inhibitors in traditional anti-corrosion coatings, traditional anti-corrosion coatings cannot always exert good anti-corrosion performance

Method used

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  • A kind of anticorrosion coating and its preparation and application method and a kind of composite material
  • A kind of anticorrosion coating and its preparation and application method and a kind of composite material
  • A kind of anticorrosion coating and its preparation and application method and a kind of composite material

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preparation example Construction

[0074] The preparation process of controlled release microcapsules may include the following steps:

[0075] S1. Add water-soluble prepolymer a and a dispersant to solvent A, so that the water-soluble prepolymer is more uniformly dispersed in solvent A. Wherein, the prepolymer refers to a substance containing at least one of an ester group or a thioester group, which can be broken and decomposed under alkaline conditions, such as an amino resin prepolymer; the solvent A can be water or a water-miscible solvent; The dispersant may be sodium lauryl sulfate, gum Arabic (Gum Arabic), xanthan gum, diatomaceous earth and the like.

[0076] S2. Dissolving the corrosion inhibitor in solvent B, the solubility of the corrosion inhibitor in solvent B is greater than that in solvent A. Wherein, the corrosion inhibitor may include sodium nitrite; the solvent B may be a water-miscible solvent, such as tetrahydrofuran (THF), dimethylformamide (DMF), adenosine acid (AMP) and the like.

[00...

Embodiment 1

[0104] At 25° C., 30 parts by weight of the film former, 2.5 parts by weight of additives and 10 parts by weight of solvent were mixed, and stirred at high speed to obtain a mixture. Wherein, the film former includes epoxy resin; the solvent includes water; the auxiliary agent includes modified organosilicone compound, polyether modified organosilicon and sodium lauryl sulfate.

[0105] Add the controllable release microcapsules that are loaded with sodium nitrite in the resulting mixture, wherein the parts by weight of the controllable release microcapsules are 0.5, and the consumption of sodium nitrite accounts for 10% of the total amount of the controllable release microcapsules, which can be controlled The particle diameter of the microcapsules is below 25 μm, and the microcapsules are uniformly dispersed to obtain the anticorrosion coating.

[0106] The microcapsule shell of the controllable release microcapsules ruptures when the pH of the environment where the controlla...

Embodiment 2

[0108] At 25° C., 70 parts by weight of film former, 20 parts by weight of filler, 10 parts by weight of auxiliary agent and 17 parts by weight of solvent were mixed, and stirred at high speed to obtain a mixture. Wherein, the film former includes polyurethane; the solvent includes water; the filler includes talcum powder, nano silicon dioxide, titanium dioxide and calcium carbonate; the auxiliary agent includes sodium lauryl sulfate.

[0109] Add the controlled-release microcapsules that are loaded with sodium nitrite in the resulting mixture, wherein the parts by weight of the controlled-release microcapsules are 30, and the consumption of sodium nitrite accounts for 45% of the consumption of the controlled-release microcapsules, and the controlled-release The particle diameter of the microcapsules is below 25 μm, and the microcapsules are uniformly dispersed to obtain the anticorrosion coating.

[0110] The microcapsule shell of the controllable release microcapsules ruptur...

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Abstract

An embodiment of the invention provides an anti-corrosion coating, a preparation and application method thereof and a composite material. The anti-corrosion coating comprises in parts by weight, 30-70 parts of film formers, 0-50 parts of fillers, 2.5-10 parts of auxiliaries, 0.5-30 parts of controlled-release microcapsules with corrosion inhibitors and 10-17 parts of solvents. Shells of the controlled-release microcapsules are fractured and release the corrosion inhibitors when the pH (potential of hydrogen) of the environment with the controlled-release microcapsules is increased to 9 or more. Therefore, the concentration of the corrosion inhibitors can be automatically adjusted according to the change of the pH of the environment, the corrosion inhibition efficiency of the corrosion inhibitors is greatly improved, so that the anti-corrosion effect of the anti-corrosion coating is greatly improved, and salt mist resistance and anti-corrosion time is prolonged from original about 1000 hours to about 8000 hours.

Description

technical field [0001] The invention relates to the field of material technology, in particular to an anti-corrosion coating, a preparation method of the anti-corrosion coating, an application method of the anti-corrosion coating and a composite material. Background technique [0002] Corrosion of metal materials is a worldwide problem. The corrosion of metal equipment not only consumes precious wealth, but also destroys the normal operation of production and life. Corroded metal equipment will deteriorate in shape, color, and mechanical properties, leading to equipment damage, serious waste of resources and energy, and even serious accidents. [0003] In order to slow down the corrosion of the metal surface, a layer of anti-corrosion coating is often coated on the surface of the metal equipment. Corrosion inhibitors are added to traditional anti-corrosion coatings. Since corrosion inhibitors can have a good slow-release effect on metals, adding corrosion inhibitors to ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D175/04C09D5/08C09D4/02C09D4/06C23F11/06C23F11/18
CPCC08K3/28C08K9/10C08K13/06C08L2205/025C08L2205/03C09D4/06C09D5/08C09D163/00C09D175/04C23F11/06C23F11/181C08L83/04
Inventor 罗莹莹李晓亮黄金星
Owner YUGREAT (BEIJING) INTERNATIONAL TECHNOLOGY CO LTD