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Environment-friendly graphene low-zinc heavy-duty anticorrosive paint for highway facilities and preparation method

A graphene and heavy-duty anti-corrosion technology, applied in anti-corrosion coatings, powder coatings, conductive coatings, etc., can solve problems such as high density of epoxy zinc-rich primer, high short-term maintenance costs, and unsuitable for weight reduction and consumption reduction. Effects of low price, improved visibility, excellent corrosion protection and mechanical properties

Pending Publication Date: 2019-07-05
JIANGNAN GRAPHENE RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its strong anti-corrosion effect and long-term protection period, heavy-duty anti-corrosion coatings are mainly used in situations with high short-term maintenance costs and relatively harsh corrosive environments, such as high temperature and high humidity, water immersion, steam, acid-base environments
Among the heavy-duty anti-corrosion coatings, the zinc-rich heavy-duty anti-corrosion coating is a coating with a relatively high usage rate. Its anti-corrosion mechanism is based on the cathodic protection effect of metal zinc powder on steel. %~85%) also brings many disadvantages to the zinc-rich primer: (1) the use of a large amount of zinc powder, the zinc oxide fume and zinc vapor generated during thermal processing such as welding and cutting, will have an impact on human health , easily lead to "zinc fever"; (2) high zinc powder content leads to poor compactness and low strength of the paint film, and poor compatibility with the topcoat; (3) epoxy zinc-rich primer has a high density and does not meet the requirements for weight reduction consumption concept

Method used

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  • Environment-friendly graphene low-zinc heavy-duty anticorrosive paint for highway facilities and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Get 5 parts of high-quality industrial-grade thin-layer graphene with an average radial size of about 20 μm and an average thickness of about 2 nm (not specifically stated below, all are parts by weight), 15 parts of zinc powder with an average particle diameter of about 10 μm, titanium 5 parts of white powder were ultrasonicated in acetone for 1 hour, and dried at 90° C. to obtain a graphene-based composite powder. Then with 50 parts of hydroxyacrylic resin water dispersion liquid with solid content of 80%, 50 parts of acrylic resin water dispersion liquid, 20 parts of amino resin water dispersion liquid, 20 parts of clear water, 1 part of dispersant, 1 part of wetting agent, fluid 1 part of leveling agent, 1 part of defoamer, stirred and dispersed in a vacuum planetary mixer (5000rpm, 4h), and then sanded in a sand mill for 5 hours, 8000rpm, to obtain the final heavy-duty anti-corrosion coating.

[0030] Use the dipping process for the coating on the outer s...

Embodiment 2

[0043] Example 2 Take 10 parts of high-quality industrial-grade thin-layer graphene with an average radial size of about 20 μm and an average thickness of about 2 nm, and 10 parts of titanium dioxide with an average particle diameter of about 15 μm, ultrasonically in acetone for 1 h, and then in this acetone solution Add 100 parts of polyester resin, stir and disperse in a high-speed disperser (5000rpm, 4h), and dry at 90°C to obtain a graphene-based composite polyester resin. The obtained graphene-based composite polyester resin is crushed to below 50 μm, and then the following raw materials are mixed evenly according to the following weight percentage: graphene-based composite polyester resin: 20-60 parts, filler: 5-30 parts, Auxiliary: 2-10 parts; then melted and extruded through a screw, and finally finely crushed and sieved to obtain a graphene-based powder heavy-duty anti-corrosion coating.

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Abstract

The invention relates to a graphene low-zinc heavy-duty anticorrosive paint, which includes a component A and a component B. The component B contains a curing agent, and the component A is composed ofthe following components by mass percentage: 1-15 parts of graphene, 30-50 parts of mixed resin, 0-20 parts of a basic solvent, 0-20 parts of zinc powder, 10-30 parts of filler and 1-5 parts of an assistant. Specifically, the mixed basis resin is a mixed aqueous dispersion of hydroxyl acrylic resin, acrylic resin and amino resin, or one of or a mixture of several of epoxy resin, polyester resin,polyurethane resin and alkyd resin. The paint provided by the invention has the characteristics of high weather resistance and abrasion resistance, and can be widely applied to the outer protection ofbalustrades, stand columns and other highway guardrail facilities and related traffic supporting facilities, and also can be used for protection of large engineering machinery, power transmission andtransformation facilities and other outdoor steel structures.

Description

technical field [0001] The invention relates to an environment-friendly graphene low-zinc heavy-duty anti-corrosion paint for road facilities and a preparation method thereof, in particular to the preparation of graphene heavy-duty anti-corrosion powder paint and water-based slurry. Background technique [0002] Highway transportation facilities are subject to long-term sun exposure, wind and rain erosion, seasonal temperature changes and environmental media. The steel surface needs a protective film to ensure the long life of the material in such a complex environment. Traditional steel surface treatment methods include painting, galvanizing, aluminum plating, galvanizing and aluminum spraying. Ordinary coatings have thinner layers, lower adhesion, and poorer weather resistance and corrosion resistance. The anti-corrosion performance of zinc or aluminum spraying is better, but it is easily corroded by acid rain and salt spray, and the color is single, so it is not easy to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/10C09D133/00C09D161/20C09D167/00C09D5/03C09D5/24
CPCC08K3/04C08K7/00C08K2003/0893C08K2003/2241C08L2201/04C08L2205/025C08L2205/03C09D5/038C09D5/106C09D5/24C09D133/00C09D167/00C08L33/00C08L61/20C08K13/04C08K3/08C08K3/22
Inventor 陈明亮孙天生蒋莱朱向东
Owner JIANGNAN GRAPHENE RES INST
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