Long-acting heavy anti-corrosion coating containing graphene-zinc powder and preparation method thereof

A graphene and heavy-duty anti-corrosion technology, applied in the direction of anti-corrosion coatings, polyamide coatings, epoxy resin coatings, etc., can solve the problems of reduced anti-corrosion efficiency, health hazards of workshop personnel, and increased weight, so as to reduce the content of zinc powder, Excellent anti-corrosion performance, the effect of large specific surface area

Inactive Publication Date: 2019-03-19
CHINA SPECIAL TYPE FLIER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although epoxy zinc-rich coatings have good anti-corrosion properties, the high content of metallic zinc in the coatings also brings a series of problems: first, the weight of the equipment increases after coating; second, the flexibility of the coating and its resistance to metals Third, zinc powder contacts with carbon dioxide, sulfur dioxide in the air or chloride ions in the salt to form loose zinc salts, which deteriorates the mechanical strength of the coating. When the coating is damaged, there is still a large amount of metal zinc to play Fourth, the zinc powder in the coating is continuously oxidized, and the anti-corrosion efficiency in the later period is continuously reduced; fifth, the zinc fog generated during welding and cutting is harmful to the health of workshop personnel.

Method used

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  • Long-acting heavy anti-corrosion coating containing graphene-zinc powder and preparation method thereof
  • Long-acting heavy anti-corrosion coating containing graphene-zinc powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A kind of preparation method of graphene-zinc powder long-acting anticorrosion coating, concrete steps are as follows:

[0051] Ⅰ. Preparation method of component A of heavy-duty anti-corrosion coating:

[0052] (1) Add the epoxy resin, graphene, filler, and solvent in the formula of A component into the stirring container, and stir at 1200r / min until the dispersion is uniform;

[0053] (2) The mixture obtained in step (1) is added to a conical grinder for grinding, and the particle size of the slurry after grinding is 25 μm;

[0054] (3) Add the zinc powder and anti-sedimentation agent in the formula amount of component A to the mixture obtained in step (2), and stir at 2000r / min until uniformly dispersed;

[0055] (4) Add the mixture obtained in step (3) to a conical grinder for grinding, and the particle size of the slurry after grinding is 30 μm to obtain component A;

[0056] Ⅱ. Preparation method of component B of heavy-duty anti-corrosion coating:

[0057] (5)...

Embodiment 2

[0060] A kind of preparation method of graphene-zinc powder long-acting anticorrosion coating, concrete steps are as follows:

[0061] Ⅰ. Preparation method of component A of heavy-duty anti-corrosion coating:

[0062] (1) Add the epoxy resin, graphene, filler, and solvent in the formula of A component into the stirring container, and stir at 1000r / min until the dispersion is uniform;

[0063] (2) The mixture obtained in step (1) is added to a conical grinder for grinding, and the particle size of the slurry after grinding is 15 μm;

[0064] (3) Add the zinc powder and anti-sedimentation agent in the formula amount of component A to the mixture obtained in step (2), and stir at 1200r / min until uniformly dispersed;

[0065] (4) Add the mixture obtained in step (3) to a conical grinder for grinding, and the particle size of the slurry after grinding is 45 μm to obtain component A;

[0066] Ⅱ. Preparation method of component B of heavy-duty anti-corrosion coating:

[0067] (5)...

Embodiment 3

[0070] A kind of preparation method of graphene-zinc powder long-acting anticorrosion coating, concrete steps are as follows:

[0071] Ⅰ. Preparation method of component A of heavy-duty anti-corrosion coating:

[0072] (1) Add the epoxy resin, graphene, filler, and solvent in the formula of A component into the stirring container, and stir at 1500r / min until the dispersion is uniform;

[0073] (2) The mixture obtained in step (1) is added to a conical grinder for grinding, and the particle size of the slurry after grinding is 20 μm;

[0074] (3) Add the zinc powder and anti-sedimentation agent in the formula amount of component A to the mixture obtained in step (2), and stir at 2000r / min until uniformly dispersed;

[0075] (4) Add the mixture obtained in step (3) to a conical grinder for grinding, and the particle size of the slurry after grinding is 25 μm to obtain component A;

[0076] Ⅱ. Preparation method of component B of heavy-duty anti-corrosion coating:

[0077] (5)...

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Abstract

The invention discloses long-acting heavy anti-corrosion coating containing graphene-zinc powder and a preparation method thereof. According to the anti-corrosion coating, graphene is added into anti-corrosion paint, the content of zinc powder is greatly reduced, zinc fog during welding and cutting can be reduced, by utilizing the super-large specific surface area, excellent conductivity and corrosion resistance of the graphene, and environmental-friendliness is achieved; the usage of zinc powder is far lower than that of existing HG/T3668-2009 standard, but the coating does not have bubble orrust in 3500 hours of salt fog tests, and has the adhesive force being more than 16MPa, which is far higher than that of the existing HG/T3668-2009 standard; and the coating does not have bubble or peeling in cathode spalling tests for a year.

Description

technical field [0001] The invention relates to the technical field of heavy-duty anti-corrosion coatings for marine environments, in particular to a long-acting heavy-duty anti-corrosion coating containing graphene-zinc powder and a preparation method thereof. Background technique [0002] The use of anti-corrosion coatings to protect metals is the most convenient and effective anti-corrosion method. Epoxy zinc-rich coating is a classic anti-corrosion coating. After water immerses in the coating, zinc powder and steel form a micro-battery. Since the electrochemical potential of zinc is lower than that of steel, the corrosion current flows from zinc to steel, producing a cathodic protection effect on steel. So as to achieve a good anti-corrosion effect. [0003] In the industry standard HG / T3668-2009 "Zinc-Rich Primer", it is clearly pointed out that the metal zinc content, adhesion and salt spray resistance performance requirements of type II zinc-rich primer (that is, org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D177/00C09D5/10C09D7/61
CPCC08K2003/0893C09D5/106C09D7/61C09D163/00C08L77/00C08K3/042C08K3/08
Inventor 龚世铭王广超何德军游加旺刘元海王浩伟廖圣智
Owner CHINA SPECIAL TYPE FLIER RES INST
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