CN111205693A - Anti-corrosion primer for bridge and preparation method thereof - Google Patents
Anti-corrosion primer for bridge and preparation method thereof Download PDFInfo
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- CN111205693A CN111205693A CN202010104996.6A CN202010104996A CN111205693A CN 111205693 A CN111205693 A CN 111205693A CN 202010104996 A CN202010104996 A CN 202010104996A CN 111205693 A CN111205693 A CN 111205693A
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- primer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an anticorrosive primer for a bridge, which comprises 0.2-5% of graphene filler and 100% of zinc-rich primer in balance by mass, wherein the graphene is treated by a metal modifier, the metal modifier is one of metal, metal doping, nano metal oxide and nano metal oxide doping, the addition amount of the metal modifier is 10-50% by mass of the graphene, and a metal element or an oxide is added in the fusion of the graphene and the zinc-rich primer to improve the binding force between the primer and the graphene, reduce the structural defects of the primer and enhance the adhesive force of a coating, thereby forming a compact protective film and improving the anticorrosive performance.
Description
Technical Field
The invention relates to the technical field of corrosion resistance, in particular to a novel anti-corrosion primer for a bridge and a preparation method thereof.
Background
Bridges play a very important role as important components of transportation systems. However, because the bridge is exposed to the natural environment for a long time, the structure of the bridge is corroded by the environment medium, so that the appearance of the bridge is attractive, and potential safety hazards are brought. In order to maintain the safety of the bridge in long-term operation, long-term corrosion protection must be carried out on the bridge structure. From the viewpoint of long-term consideration and large-scale application, the cost performance of a mode of adopting the anticorrosive paint for protection is higher in a plurality of anticorrosive strategies. At present, the anti-corrosion system of the bridge steel structure mainly adopts a bottom-middle-surface long-acting anti-corrosion coating system. In an anticorrosive coating system, the bottom, the middle and the top have different work division protection functions respectively, and as the first layer of a paint system, the selection of a primer is very important. In order to ensure high adhesion and excellent rust resistance of the primer, an epoxy zinc-rich primer or an inorganic zinc-rich primer with good electrochemical protection performance is generally adopted. However, the epoxy resin has poor weather resistance, is easy to pulverize, and has poor capability of bearing strong corrosive media at high temperature; the inorganic zinc-rich primer has high construction requirements, is greatly influenced by temperature and humidity, requires a special sealing paint or a mist spraying technology, and has strict requirements on the thickness of a paint film. Graphene originated in 2004 is a novel single-layer sheet-like structure material composed of carbon atoms, and the small-size effect, the two-dimensional sheet-like structure, the hydrophobicity and the conductivity of the graphene enable the graphene to be used as an additive in an anticorrosive paint primer to improve the anticorrosive performance of the paint. However, due to the conjugated structure of graphene, the binding force and compatibility between graphene and water, organic solvents and polymers are not strong enough, and the like, the problem of poor compatibility can occur when graphene is added into the primer.
Disclosure of Invention
In view of the above, the present invention provides an anti-corrosion primer for a bridge and a preparation method thereof, wherein an additive is used to improve the bonding force between the primer and graphene and reduce the structural defects thereof, so that a dense protective film is formed and the anti-corrosion performance is enhanced.
The primer raw material comprises 0.2-5% of graphene filler and 100% of zinc-rich primer in balance by mass, wherein the graphene is treated by a metal modifier, the metal modifier is one of metal, nano metal oxide or dopants of the metal and the nano metal oxide, and the addition amount of the metal modifier is 10-50% of the graphene by mass;
further, the mass ratio of the graphene filler is 3%, and the addition amount of the metal modifier is 30% of the mass ratio of the graphene;
further, the metal modifier is a rare earth metal;
further, the rare earth metal is one or two of Ce and Zr;
further, the nano metal oxide is SiO2、ZrO2、TiO2One or a mixture of two or more of them.
According to the preparation method of the anti-corrosion primer for the bridge, any one of a hydrothermal method, a coprecipitation method and an impregnation method is adopted to mix the primer raw materials;
further, the graphene is mixed with the metal modifier and then mixed with the zinc-rich primer.
The invention has the beneficial effects that: according to the anti-corrosion primer for the bridge and the preparation method thereof, the metal element or the oxide is added in the fusion of the graphene and the zinc-rich primer to improve the binding force between the primer and the graphene, reduce the structural defects of the primer and enhance the adhesive force of the coating, so that a compact protective film is formed, and the anti-corrosion performance is improved.
Detailed Description
According to the anticorrosive primer for the bridge, the raw materials of the primer comprise 0.2-5% of graphene filler and 100% of zinc-rich primer in balance by mass ratio, the graphene is treated by a metal modifier, the metal modifier is one of metal, metal doping, nano metal oxide and nano metal oxide doping, and the addition amount of the metal modifier is 10-50% of the mass ratio of the graphene. By adding the metal element or the oxide into the fusion of the graphene and the zinc-rich primer, the binding force between the primer and the graphene is improved, the structural defects of the primer are reduced, and the adhesive force of the coating is enhanced, so that a compact protective film is formed, and the corrosion resistance is improved. The addition amount of the graphene and the additive directly influences the dispersibility, the compatibility and the adhesive force of the primer coating. The metals or metal oxides may be doped simultaneously. For example, zinc is first doped into titanium dioxide, and then zinc-doped titanium dioxide nanoparticles are combined with graphene by hydrothermal method. The titanium dioxide can be doped with nitrogen or some transition metals, and the titanium dioxide can also be compounded with graphite. Whether the metal or metal oxide is doped alone or both, and the doping sequence of the various species, may be determined by the nature of the doping species.
In this embodiment, the mass ratio of the graphene filler is 3%, and the addition amount of the metal modifier is 30% of the mass ratio of graphene. The better the dispersibility, compatibility and adhesion of the primer coating, which is a preferred embodiment.
In this embodiment, the additive is a metal element, and the metal element is a rare earth metal; preferably, one or two of Ce and Zr are adopted; cerium has a strong storage function, and has excellent electrochemical performance due to the unique electronic configuration; zirconium has a high specific surface area and abundant surface defects; the addition of the substances improves the binding force between the primer and the graphene, enhances the adhesive force of the coating and improves the corrosion resistance.
In this embodiment, the additive is a nano oxide, and the nano oxide is SiO2、ZrO2、TiO2One or a mixture of two or more of them; the nanoparticles have a good pore structure, SiO2、ZrO2、TiO2The nano particles have unique structure and components, so that the ultraviolet aging resistance of the coating can be improved, and the mechanical strength of the coating is greatly improved; the addition of the substances improves the binding force between the primer and the graphene, enhances the adhesive force of the coating and improves the corrosion resistance.
The invention discloses a preparation method of an anticorrosion primer for a bridge, which comprises the steps of mixing the raw materials of the primer by any one of a hydrothermal method, a coprecipitation method and an impregnation method; preferably, the graphene is mixed with the additive and then mixed with the zinc-rich primer; the preparation process is simple, the mixing mode is various, the operation is easy and safe, and the method is suitable for industrial production.
Example one
According to the anti-corrosion primer for the bridge, the primer raw materials comprise 0.2% of graphene filler and 100% of zinc-rich primer in balance by mass ratio; the graphene is treated by a metal modifier, the metal modifier is metal Zr, and the addition amount of the metal Zr is 10% (mass ratio) of the graphene; the combination mode of the graphene and the metal can adopt a hydrothermal method, a coprecipitation method or an impregnation method to obtain a mixture A; the mixture A is used as primer modified filler and added into the zinc-rich primer, the adding proportion accounts for 0.2 percent (mass ratio) of the mass of the zinc-rich primer, and the combination mode of the mixture A and the zinc-rich primer can adopt a hydrothermal method, a coprecipitation method or an impregnation method.
Example two
According to the anti-corrosion primer for the bridge, the primer raw materials comprise 5% of graphene filler and the balance of zinc-rich primer added to 100% by mass; the graphene is treated by a metal modifier, the metal modifier is a nano metal oxide, and the addition amount of the nano metal oxide is 50% (mass ratio) of the graphene; the combination mode of the graphene and the metal oxide can adopt a hydrothermal method, a coprecipitation method or an impregnation method to obtain a mixture A; the mixture A is used as primer modified filler and added into the zinc-rich primer, the adding proportion accounts for 5 percent (mass ratio) of the mass of the zinc-rich primer, and the combination mode of the mixture A and the zinc-rich primer can adopt a hydrothermal method, a coprecipitation method or an impregnation method.
EXAMPLE III
The anticorrosion primer for the bridge of the embodiment comprises 0.3% of graphene filler and 100% of zinc-rich primer in balance by mass; the graphene is treated by a metal modifier, the metal modifier is zinc-doped titanium dioxide nanoparticles, and the addition amount of the zinc-doped titanium dioxide nanoparticles is 20% (mass ratio) of the graphene; the combination mode of the graphene and the zinc-doped titanium dioxide nanoparticles can adopt a hydrothermal method, a coprecipitation method or an impregnation method to obtain a mixture A; the mixture A is used as primer modified filler and added into the zinc-rich primer, the adding proportion accounts for 1 percent (mass ratio) of the mass of the zinc-rich primer, and the combination mode of the mixture A and the zinc-rich primer can adopt a hydrothermal method, a coprecipitation method or an impregnation method.
Example four
The anticorrosion primer for the bridge of the embodiment comprises 3% of graphene filler and the balance of zinc-rich primer added to 100% by mass; the graphene is treated by a metal modifier, the metal modifier is titanium dioxide doped nitrogen, and the addition amount of the titanium dioxide doped nitrogen is 40% (mass ratio) of the graphene; the combination mode of the graphene and the titanium dioxide doped nitrogen can adopt a hydrothermal method, a coprecipitation method or an impregnation method to obtain a mixture A; the mixture A is used as primer modified filler and added into the zinc-rich primer, the adding proportion accounts for 4% of the mass of the zinc-rich primer, and the combination mode of the mixture A and the zinc-rich primer can adopt a hydrothermal method, a coprecipitation method or an impregnation method.
EXAMPLE five
According to the anti-corrosion primer for the bridge, the primer raw materials comprise 1% of graphene filler and 100% of zinc-rich primer in balance by mass ratio; the graphene is treated by a metal modifier, the metal modifier is silicon dioxide doped nitrogen, and the addition amount of the silicon dioxide doped nitrogen is 15% (mass ratio) of the graphene; the combination mode of the graphene and the silicon dioxide doped nitrogen can adopt a hydrothermal method, a coprecipitation method or an impregnation method to obtain a mixture A; the mixture A is used as primer modified filler and added into the zinc-rich primer, the adding proportion accounts for 1.5% of the mass of the zinc-rich primer, and the combination mode of the mixture A and the zinc-rich primer can adopt a hydrothermal method, a coprecipitation method or an impregnation method.
EXAMPLE six
According to the anti-corrosion primer for the bridge, the primer raw materials comprise 0.2-5% of graphene filler and 100% of zinc-rich primer in balance by mass ratio; the graphene is treated by a metal modifier, wherein the metal modifier is Ce, and the addition amount of the Ce is 30% of the mass ratio of the graphene; the combination mode of the graphene and the Ce can adopt a hydrothermal method, a coprecipitation method or an impregnation method to obtain a mixture A; the mixture A is used as primer modified filler and added into the zinc-rich primer, the adding proportion accounts for 3% of the mass of the zinc-rich primer, and the combination mode of the mixture A and the zinc-rich primer can adopt a hydrothermal method, a coprecipitation method or an impregnation method.
In the above examples, the hydrothermal method, the coprecipitation method, and the impregnation method are all the prior art, and the object of the present invention can be achieved as long as the materials are sufficiently mixed and uniformly dispersed.
The performance indexes of the anti-corrosion primer for the bridge of the embodiment are as follows:
finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The anti-corrosion primer for the bridge is characterized in that: the primer raw materials comprise 0.2-5% of graphene filler and 100% of zinc-rich primer in balance by mass, the graphene is treated by a metal modifier, the metal modifier is one of metal, metal doping, nano metal oxide and nano metal oxide doping, and the addition amount of the metal modifier is 10-50% of the graphene by mass.
2. The anticorrosion primer for bridges of claim 1, wherein: the mass ratio of the graphene filler is 3%, and the addition amount of the metal modifier is 30% of the mass ratio of the graphene.
3. The anticorrosion primer for bridges of claim 1, wherein: the metal modifier is rare earth metal.
4. The anticorrosion primer for bridges of claim 2, wherein: the rare earth metal is one or two of Ce and Zr.
5. The anticorrosion primer for bridges of claim 1, wherein: the nano metal oxide is SiO2、ZrO2、TiO2One or a mixture of two or more of them.
6. The preparation method of the anti-corrosion primer for the bridge according to claim 1, wherein the preparation method comprises the following steps: and mixing the primer raw materials by adopting any one of a hydrothermal method, a coprecipitation method and an impregnation method.
7. The preparation method of the anti-corrosion primer for the bridge according to claim 6, wherein the preparation method comprises the following steps: firstly, mixing graphene with a metal modifier and then mixing the graphene with a zinc-rich primer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010104996.6A CN111205693A (en) | 2020-02-20 | 2020-02-20 | Anti-corrosion primer for bridge and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010104996.6A CN111205693A (en) | 2020-02-20 | 2020-02-20 | Anti-corrosion primer for bridge and preparation method thereof |
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| CN111205693A true CN111205693A (en) | 2020-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115926586A (en) * | 2023-02-01 | 2023-04-07 | 天津大学 | Epoxy heat-conducting anticorrosive paint and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115926586B (en) * | 2023-02-01 | 2023-08-18 | 天津大学 | Epoxy heat-conducting anticorrosive paint and preparation method thereof |
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