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Preparation method for protective coating doped and modified by silicon dioxide and application of preparation method

A silicon dioxide and protective coating technology, applied in the field of metal anti-corrosion, can solve the problems of drug waste, energy consumption, many steps, etc., and achieve the effects of convenient operation, saving time and resources, and simple process

Active Publication Date: 2018-06-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method requires many steps, takes a long time, causes serious waste of medicines, and consumes a large amount of energy.

Method used

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  • Preparation method for protective coating doped and modified by silicon dioxide and application of preparation method
  • Preparation method for protective coating doped and modified by silicon dioxide and application of preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 100 mL of water to the jar, add sodium hydroxide to adjust the pH to 14.0, add 1.00 g of triblock copolymer F27, 1.00 g of urotropine, stir well, heat the mixed solution to 100 °C, add 10 mL of Ethyl silicate, reaction 24h. The obtained suspension is separated, and the obtained precipitate is washed with water and then dried to obtain a solid silicon dioxide powder. Add 0.01 wt% silica powder to the alkyd resin and stir well. Brush the modified paint onto the surface of the pure copper substrate. After drying and curing, a silicon dioxide-doped modified protective coating can be obtained. The cross-sectional scanning electron micrographs of the prepared silica-doped modified alkyd coating are as follows: figure 1 shown. Accelerated corrosion control experiments were performed using a pure copper substrate coated with a blank alkyd coating or a silica-doped modified alkyd coating. First, a blade is used to produce a defect of one centimeter long, 50 microns wide...

Embodiment 2

[0027] Add 25 mL of water and 75 mL of ethanol in a jar, add sodium hydroxide to adjust the pH to 9.0, add 0.05 g of triblock copolymer P123, 0.05 g of mercaptobenzothiazole, stir well, and heat the mixed solution to 25 °C. Add 0.1 mL of methyl orthosilicate and react for 0.1 h. The obtained suspension was separated, and the obtained precipitate was washed with water and then dried to obtain a solid silicon dioxide powder. The transmission electron microscope photo of it is as follows: figure 2 shown. Add 10 wt% silica powder to the alkyd resin and stir well. Dip-coat the modified coating onto the surface of a pure copper substrate. After drying and curing, a silicon dioxide-doped modified protective coating can be obtained. The corrosion protection performance evaluation is the same as in Example 1, and the experimental results are listed in Table 2.

[0028] Table 2 Corrosion test results of alkyd coating and silicon dioxide doped modified alkyd coating on pure copper s...

Embodiment 3

[0031] Add 90 mL of water and 10 mL of ethanol to the jar, add sodium hydroxide to adjust the pH to 12.0, add 1.00 g of cetyltrimethylammonium chloride, 0.50 g of benzotriazole, stir well, and mix the solution Heated to 80 °C, added 3 mL of ethyl orthosilicate, and reacted for 2 h. The obtained suspension is separated, and the obtained precipitate is washed with water and then dried to obtain a solid silicon dioxide powder. Add 1.0wt% silica powder to the alkyd resin and stir well. Brush the modified paint onto the surface of the pure copper substrate. After drying and curing, a silicon dioxide-doped modified protective coating can be obtained. Accelerated corrosion control experiments were performed using a pure copper substrate coated with a blank alkyd coating or a silica-doped modified alkyd coating. The corrosion protection performance evaluation is the same as in Example 1, and the experimental results are listed in Table 3.

[0032] Table 3 Corrosion test results of...

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Abstract

The invention discloses a preparation method for a protective coating doped and modified by silicon dioxide and an application of the preparation method. According to the method provided by the invention, through a solvothermal method, in the process of preparing mesporous silicon dioxide nanoparticles, an organic corrosion inhibitor is added directly, a soft template does not need to be removed,corrosion inhibitor supported mesoporous silicon dioxide powder is obtained by a one-step method, and the powder is mixed into a coating to improve the protective properties of the coating; when the mesoporous silicon dioxide nanoparticles are generated, the organic corrosion inhibitor is dissolved into hydrophobic micelles of a silicon dioxide template, and then loaded into the silicon dioxide, after the corrosion inhibitor supported mesoporous silicon dioxide powder is mixed into the coating, corrosion inhibition performance can be provided for a metal substrate, and the corrosion protectionability of the coating can be improved; and the method is applicable to various common metal substrates and coatings, has a simple process and low costs, and is suitable for industrialized applications.

Description

technical field [0001] The invention belongs to the field of metal anticorrosion, and in particular relates to a preparation method and application of a silicon dioxide-doped and modified protective coating. Background technique [0002] Metal materials are widely used due to their excellent properties, but most metals are prone to corrosion in the natural environment, causing serious economic losses and safety accidents. Therefore, improving metal corrosion resistance, preventing or slowing down metal corrosion has received extensive attention and research. Among them, coating the metal surface is a relatively simple, economical and widely used method to improve metal corrosion protection. In order to enhance the corrosion protection performance of the coating, corrosion inhibitors are usually added to the bulk or pretreatment layer of the coating. The traditional corrosion inhibitor loading method is to carry out phosphate phosphating treatment and chromate chromization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D7/61
CPCC09D5/08
Inventor 胡吉明徐俊波
Owner ZHEJIANG UNIV
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