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Self-repaired corrosion-resistant coating with anti-fouling function and preparation method of self-repaired corrosion-resistant coating

An anti-corrosion coating, self-healing technology, applied in anti-corrosion coatings, anti-fouling/underwater coatings, coatings, etc., can solve the problem of not having antibacterial and anti-fouling properties, accelerating the dissolution process of carbon steel anodes, and failing to achieve ideal protection effects and other problems, to achieve the effect of broad application prospects

Inactive Publication Date: 2018-03-06
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, traditional self-healing coatings do not have antibacterial and antifouling properties. In the practical application of steel in marine environments, the hazards of microbial corrosion cannot be underestimated. Their metabolism affects the corrosion reaction process at the metal / seawater interface, especially Some anaerobic microorganisms such as sulfate-reducing bacteria will produce sulfide during the metabolic process, which will accelerate the anodic dissolution process of carbon steel, resulting in the failure of the ideal protection effect after the corrosion inhibitor or healing agent in the traditional self-healing coating is released.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add urea with a molar ratio of 1:1.75 and 37wt% formaldehyde solution into the reactor, place it in a collector type magnetic heating stirrer, and make the urea completely dissolve in the formaldehyde under stirring, adjust the concentration of the solution with triethanolamine pH to 8, then heated to 75 ° C, stirred and incubated for 1 h, and the reaction was carried out to obtain a prepolymer. Prepare a certain concentration of DCOIT, add an emulsifier, stir and disperse quickly for 30 minutes, and obtain an emulsion containing a fungicide. Take 5 mL of prepolymer, add distilled water to dilute to a certain concentration, add a small amount of NaCl under rapid stirring, add the emulsion containing fungicide after complete dissolution, mix and disperse for 15 minutes, then add 0.1M hydrochloric acid in batches to adjust the pH to 3. React at 35° C. with rapid stirring for 1 h, then raise the temperature to 65° C. and react with rapid stirring for 0.5 h to obtain a susp...

Embodiment 2

[0031] Add urea with a molar ratio of 1:1.75 and 37wt% formaldehyde solution into the reactor, place it in a collector type magnetic heating stirrer, and make the urea completely dissolve in the formaldehyde under stirring, adjust the concentration of the solution with triethanolamine pH to 8, then heated to 75 ° C, stirred and incubated for 1 h, and the reaction was carried out to obtain a prepolymer. Prepare a certain concentration of DCOIT, add an emulsifier, stir and disperse quickly for 30 minutes, and obtain an emulsion containing a fungicide. Take 5 mL of prepolymer, add distilled water to dilute to a certain concentration, add a small amount of NaCl under rapid stirring, add the emulsion containing fungicide after complete dissolution, mix and disperse for 15 minutes, then add 0.1M hydrochloric acid in batches to adjust the pH to 3. React at 35° C. with rapid stirring for 1 h, then raise the temperature to 65° C. and react with rapid stirring for 0.5 h to obtain a susp...

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Abstract

The invention designs a self-repaired corrosion-resistant coating with an anti-fouling function and a preparation method of the self-repaired corrosion-resistant coating and belongs to the field of ocean corrosion resistant and anti-fouling coatings. The self-repaired corrosion-resistant coating is characterized in that high polymer microspheres with a fungicide and a nano container with a corrosion inhibitor are put into the coating, so that the coating has functions of microorganism resistance and self-repaired corrosion resistance. The preparation method of the self-repaired corrosion-resistant coating is characterized by comprising the following steps: dispersing the high polymer microspheres with the fungicide and the nano container with the corrosion inhibitor into an epoxy resin, mixing the epoxy resin with a certain amount of an epoxy resin curing agent so as to obtain a coating, and coating the surface of carbon steel by the coating, thereby obtaining the self-repaired corrosion-resistant coating with the anti-fouling function.

Description

technical field [0001] The invention relates to a self-repairing anti-corrosion coating with anti-fouling function and a preparation method thereof, belonging to the field of marine anti-corrosion and anti-fouling coatings. Background technique [0002] During long-term use, organic anti-corrosion coatings will suffer from wear, wear and abrasion, and are prone to bubbling, pinholes and micro-cracks, which will expose a small area of ​​metal to corrosive media, causing localized corrosion, and causing the coating to expire prematurely. In recent years, research on intelligent self-healing anti-corrosion coatings has been increasing year by year. When such coatings are broken, functional microspheres or nano-containers dispersed in the coating can release healing agents or corrosion inhibitors to generate protection on the metal surface. A film that prevents or slows down the corrosion process of metals. [0003] At present, the research on self-healing anti-corrosion coati...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/16C09D5/08
CPCC08L2205/03C08L2205/18C09D5/08C09D5/14C09D5/1687C09D163/00C08L5/08C08L61/24C08K7/24C08K5/47C08K5/3437C08K5/17
Inventor 钱备
Owner QINGDAO AGRI UNIV
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