Graphene paint for steel fastening parts and preparation method of graphene paint

A technology of graphene and fasteners, which is applied in the field of graphene coatings for steel fasteners and its preparation, which can solve the problems of low hardness, easy falling off, and damage of Dacromet coatings, so as to ensure reliable use and safety operation, long salt spray resistance time, and improved corrosion resistance

Inactive Publication Date: 2016-05-18
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these methods all have certain deficiencies. Electrogalvanizing, electrochrome plating and electroplating cadmium are prone to hydrogen embrittlement, causing serious environmental pollution and general anticorrosion effect; The layer has low hardness and is easy to be scratched. It is easy to cause damage during the assembly process and lose its protective effect. Moreover, the hexavalent chromium in the dacromet treatment solution has carcinogenic effect and is harmful to the human body and the environment. The cost of Teflon coating is high, Adhesion is average, and the thickness is high, it is difficult to meet the assembly dimensional accuracy requirements of fasteners
CN103342957A Chinese patent discloses a fluorine-containing polymer fastener anticorrosion coating and a preparation method thereof, wherein the disclosed coating uses N-methylpyrrolidone solution of polyamide-imide as a bonding primer, fluorine-containing polymer Novolac epoxy resin paint is used as the top coat. Although the thickness of the provided coating is as high as 20-30μm, the salt spray resistance time is only 150-210h
[0004] Above-mentioned is the technology about fastener anticorrosion coating and graphene anticorrosion coating and preparation method thereof, but the report that graphene is used for steel fastener coating is not disclosed

Method used

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  • Graphene paint for steel fastening parts and preparation method of graphene paint

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Urea-formaldehyde resin, 28 parts; melamine-formaldehyde resin, 2 parts; graphene, 0.2 parts; aluminum silver paste, 8 parts; zinc powder, 6 parts; filler, 5 parts; additives, 2 parts; solvent, 20 parts.

[0021] (1) Add 8 parts of aluminum-silver paste and 6 parts of zinc powder into 10 parts of solvent, stir and mix, and let stand for 6 hours to obtain metal powder paste;

[0022] (2) 0.2 parts of graphene, 0.4 parts of zinc phosphate, 2 parts of zinc tungstate, 2.5 parts of bismuth vanadate, 0.1 part of molybdenum disulfide, 28 parts of urea-formaldehyde resin, 2 parts of melamine-formaldehyde resin, 0.5 parts of wetting and dispersing agent , 0.1 part of substrate wetting agent, 0.1 part of defoamer, and 10 parts of solvent are added to the disperser, dispersed at 1000 rpm for 30 minutes, then transferred to a grinder, and ground to a fineness of 7 μm to obtain a resin slurry;

[0023] (3) Transfer the resin slurry in step (2) to a disperser, add the metal powder sl...

Embodiment 2

[0025] Urea-formaldehyde resin, 21 parts; melamine-formaldehyde resin, 9 parts; graphene, 1.5 parts; aluminum silver paste, 6 parts; zinc powder, 9 parts; filler, 8 parts; additive, 3 parts; solvent, 30 parts.

[0026] (1) Add 6 parts of aluminum-silver paste and 9 parts of zinc powder into 15 parts of solvent, stir and mix, and let stand for 4 hours to obtain metal powder paste;

[0027] (2) 1.5 parts of graphene, 5 parts of zinc molybdate, 2.5 parts of aluminum tripolyphosphate, 0.5 parts of polytetrafluoroethylene micropowder, 21 parts of urea-formaldehyde resin, 9 parts of melamine-formaldehyde resin, 1.5 parts of wetting and dispersing agent, 0.2 Add one part of substrate wetting agent, 0.2 part of defoamer, and 15 parts of solvent into a disperser, disperse at 1200 rpm for 30 minutes, then transfer to a grinder, and grind to a fineness of 10 μm to obtain a resin slurry;

[0028] (3) Transfer the resin slurry in step (2) to a disperser, add the metal powder slurry in step...

Embodiment 3

[0030] Urea-formaldehyde resin, 36 parts; melamine-formaldehyde resin, 4 parts; graphene, 4 parts; aluminum silver paste, 24 parts; zinc powder, 8 parts; filler, 16 parts; additive, 6 parts; solvent, 64 parts.

[0031] (1) Add 24 parts of aluminum-silver paste and 8 parts of zinc powder to 32 parts of solvent, stir and mix, and let stand for 8 hours to obtain metal powder paste;

[0032] (2) 4 parts of graphene, 2 parts of zinc phosphate, 3 parts of aluminum tripolyphosphate, 10 parts of zinc tungstate, 1 part of molybdenum disulfide, 36 parts of urea-formaldehyde resin, 4 parts of melamine-formaldehyde resin, 2.5 parts of wet dispersion agent, 0.4 parts of substrate wetting agent, 0.3 parts of defoamer, and 32 parts of solvent were added to the disperser, dispersed at 1200 rpm for 30 minutes, then transferred to a grinder, and ground to a fineness of 13 μm to obtain a resin slurry ;

[0033] (3) Transfer the resin slurry in step (2) to a disperser, add the metal powder slurr...

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Abstract

The invention discloses graphene paint for steel fastening parts and a preparation method of the graphene paint. The graphene paint is prepared from, by mass, 20-50 parts of urea formaldehyde resin, 1-10 parts of melamine-formaldehyde resin, 0.1-5 parts of graphene, 5-30 parts of aluminum paste, 5-30 parts of zinc powder, 2-10 parts of packing, 1-8 parts of an auxiliary and 10-70 parts of solvent. The paint can be applied to the surfaces of the steel fastening parts, a coating formed through heating curing has the advantages of being small in thickness, high in hardness, resistant to wear, good in adhesive force, low in frictional coefficient and excellent in corrosion resistance, therefore, corrosion of the steel fastening parts can be effectively delayed, and the service life of the steel fastening parts is prolonged.

Description

technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to a graphene coating for steel fasteners and a preparation method thereof. Background technique [0002] Steel fasteners are widely used in aerospace, marine ships, transportation, roads and bridges, petrochemical, construction and other fields, and are indispensable materials in modern industrial society. However, steel fasteners during use are susceptible to various corrosions due to high temperature, high humidity, salt spray, acid rain, ultraviolet rays and other factors: such as electrochemical corrosion, stress corrosion, galvanic corrosion, etc. As a result of corrosion, the fastening effect becomes ineffective, posing potential safety hazards and causing major mechanical accidents; at the same time, corrosion can also make fasteners difficult to disassemble, increasing maintenance and repair work time and labor costs. At present, there are mainly the following ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/24C09D161/28C09D5/10C09D7/12
Inventor 刘虎原玲汤智慧曹文健杨瑞辛
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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