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Graphene-polyaniline composite heavy-duty anti-corrosion coating and preparation method thereof

A graphene and polyaniline technology, applied in anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problems of low utilization rate, waste, pollution, etc. of zinc, improve utilization rate, simple preparation method, and meet performance indicators Effect

Inactive Publication Date: 2018-07-03
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a graphene-polyaniline composite heavy-duty anti-corrosion coating and preparation method thereof, the heavy-duty anti-corrosion coating solves the low utilization rate of zinc in existing zinc-rich primers, and causes pollution and waste, etc. problem, it improves the utilization rate and service life of zinc in the epoxy zinc-rich primer, and the electrochemical impedance value reaches 10 5 Ω, which meets the performance indicators required in the severely corrosive environment in the ocean

Method used

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  • Graphene-polyaniline composite heavy-duty anti-corrosion coating and preparation method thereof
  • Graphene-polyaniline composite heavy-duty anti-corrosion coating and preparation method thereof
  • Graphene-polyaniline composite heavy-duty anti-corrosion coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] A preparation method of graphene-polyaniline composite heavy-duty anti-corrosion coating:

[0043] Take 0.1g of graphene and 0.1g of sodium dodecylbenzene sulfonate in 200mL of pure water for 2 hours, filter, and dry at 70°C;

[0044] After drying, add 0.5mL aniline and 25mL hydrochloric acid and stir at 5°C for 1h, add 0.6g ammonium persulfate, stir at 5°C for 24h, filter the solution with suction, wash, and dry to obtain graphene-polyaniline;

[0045] Take 0.0075g of the above-prepared graphene-polyaniline, add 1.5mL xylene and perform ultrasonication for 30min, take it out for later use; take 4g of epoxy resin and 1g of curing agent, stir well, pour the ultrasonicated graphene-polyaniline- Toluene solution, continue to stir evenly; add 4g of zinc powder, then fully stir, let it stand for 2min, apply the slurry on a 10×10×1mm iron block (polish the surface of the iron block smooth with 800# sandpaper), let it dry naturally for 48h, Finish the preparation.

[0046] S...

Embodiment 2

[0051] A preparation method of graphene-polyaniline composite heavy-duty anti-corrosion coating:

[0052] Take 0.1g of graphene and 0.1g of sodium dodecylbenzene sulfonate in 200mL of pure water for 2 hours, filter, and dry at 70°C;

[0053] After drying, add 0.5mL aniline and 25mL hydrochloric acid and stir at 5°C for 1h, add 0.6g ammonium persulfate, stir at 5°C for 24h, filter the solution with suction, wash, and dry to obtain graphene-polyaniline;

[0054] Take 0.015g of the above-prepared graphene-polyaniline, add 1.5mL of xylene and perform ultrasonication for 30min, take it out for later use; take 4g of epoxy resin and 1g of curing agent, stir well, pour in the ultrasonicated solution, and continue to stir evenly; add 4g of zinc powder, then fully stirred, let it stand for 2 minutes, and coated the coating on a 10×10×1mm iron block (the surface of the iron block was smoothed with 800# sandpaper), and dried naturally for 48 hours to complete the preparation.

[0055] Su...

Embodiment 3

[0057] A preparation method of graphene-polyaniline composite heavy-duty anti-corrosion coating:

[0058] Take 0.1g of graphene and 0.1g of sodium dodecylbenzene sulfonate in 200mL of pure water for 2 hours, filter, and dry at 70°C;

[0059] After drying, add 0.5mL aniline and 25mL hydrochloric acid and stir at 5°C for 1h, add 0.6g ammonium persulfate, and stir at 5°C for 24h. The solution is suction filtered, washed and dried;

[0060] Take 0.03g of graphene-polyaniline, add 2mL of xylene for ultrasonication for 30min, take it out for later use; take 4g of epoxy resin and 1g of curing agent, stir well, pour in the ultrasonicated solution, and continue stirring evenly; add 4g of zinc powder, Stir fully again, let it stand for 2 minutes, apply the coating on a 10×10×1mm iron block (the surface of the iron block is smoothed with 800# sandpaper), let it dry naturally for 48 hours, and complete the preparation.

[0061] Such as Figure 4 Shown, be the electrochemical impedance ...

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Abstract

The invention discloses a graphene-polyaniline composite heavy-duty anti-corrosion coating and a preparation method thereof. The heavy-duty anti-corrosion coating comprises a graphene-polyaniline composite material, cured epoxy resin and zinc powder, wherein the mass fraction of the graphene-polyaniline composite material is 0.3-0.8% of the mass of the cured epoxy resin. The preparation method ofthe heavy-duty anti-corrosion coating is simple, and industrial production can be achieved easily; the electrochemical impedance value of the prepared graphene-polyaniline composite heavy-duty anti-corrosion coating reaches 105 omega, so that required performance indexes required in a severely corrosive environment of the ocean are met.

Description

technical field [0001] The invention relates to a heavy-duty anti-corrosion coating, in particular to a graphene-polyaniline composite heavy-duty anti-corrosion coating and a preparation method thereof. Background technique [0002] Marine corrosion is a common problem facing the world today. It is engulfing my country's offshore engineering facilities at an alarming rate, threatening the safety of offshore engineering facilities all the time, and greatly hindering the pace of my country's marine economic development. In all anti-corrosion Among the measures, the use of organic coating protection, that is, anti-corrosion coatings, is the most widely used, most economical, and most convenient method. Heavy-duty anti-corrosion coatings refer to a type of anti-corrosion coatings that can be applied in relatively harsh corrosive environments and have a longer protection period than conventional anti-corrosion coatings. [0003] Epoxy zinc-rich primer is widely used in marine ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/65C09D7/61C08G73/02
Inventor 邱智超类延华刘景榕刘涛孙硕添李冬冬尹衍升
Owner SHANGHAI MARITIME UNIVERSITY
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