CN112920649A - Graphene modified rust conversion anticorrosive paint - Google Patents
Graphene modified rust conversion anticorrosive paint Download PDFInfo
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- CN112920649A CN112920649A CN202110113865.9A CN202110113865A CN112920649A CN 112920649 A CN112920649 A CN 112920649A CN 202110113865 A CN202110113865 A CN 202110113865A CN 112920649 A CN112920649 A CN 112920649A
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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
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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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
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
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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
- 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
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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
- 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
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/329—Phosphorus containing acids
Abstract
The invention discloses a graphene modified rust conversion anticorrosive paint which comprises the following components in parts by weight: 30-50 parts of water-based resin, 1.0-6.0 parts of rust converting agent, 0.2-1.0 part of graphene, 5.0-10 parts of aluminum tripolyphosphate, 5.0-15 parts of filler, 0.2-0.6 part of rheological additive, 0.2-0.5 part of defoaming agent, 1.0-2.0 parts of film forming additive and 20-30 parts of water. The anticorrosive coating can effectively convert rust on a steel substrate, forms a shielding coating on the surface of the substrate, prolongs the anticorrosive life of the coating, and particularly has good matching property with a zinc-rich coating, and the formed composite coating has good electrochemical property and plays a role in cathode protection. Therefore, the coating can be used independently and can be matched with an epoxy zinc-rich coating for use, and the difficulty of rust removal engineering in the maintenance process of bridges, electric towers, petrochemical industry and large steel structures is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a rust conversion anticorrosive coating, and more particularly relates to a graphene modified rust conversion anticorrosive coating.
Background
The steel material has the defect of easy corrosion, the common corrosion prevention means is a coating method, rust removal needs to be carried out on the metal surface before coating, and the rust removal grade at least reaches Sa2.5. The traditional rust removing method has the defects of high cost, high working strength, environmental pollution and the like due to mechanical rust removing, acid pickling rust removing, sand blasting rust removing and the like, particularly aims at the problem that the existing steel structure facility cannot be completely rust removed in many cases due to the fact that the existing effect cannot be achieved by directly coating the anticorrosive paint, great labor and material waste is caused, and certain potential safety hazards are brought, so that the coating with rust becomes a research hotspot in the field.
Much of the rust conversion coating is currently undertaken, and research is mainly focused on the aspects of rust conversion agents and film-forming materials used. Although rust conversion can realize rusty coating, and after coating, the rust of a base material can be converted into a passivating substance, but the rust conversion coating has poor capability of preventing rust again, and can only be used in places with low corrosion prevention requirements, and an anticorrosive coating needs to be coated on the rust conversion coating aiming at iron towers, bridges and large steel structure places.
Therefore, the novel rust conversion coating capable of efficiently realizing rust conversion and meeting the cathode protection requirement of a subsequent coating and the heavy-duty anticorrosion requirement of renovation and maintenance in the fields of bridges, power iron towers, large steel structure buildings and the like are developed, the important significance is achieved, the purposes of saving manpower and materials can be achieved, the protection effect and the safety are improved, and the market demand is wide.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the graphene modified rust conversion anticorrosive paint which has the function of passivating a rust layer, can be well matched with a zinc-rich coating, and is suitable for the rust conversion process of large steel.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the technical purpose of the first aspect of the invention is to provide a graphene modified rust conversion anticorrosive paint, which comprises the following components in parts by weight:
30-50 parts of water-based resin
1.0-6.0 parts of rust converting agent
0.2-1.0 part of graphene
5.0-10 parts of aluminum tripolyphosphate
5.0-15 parts of filler
0.2-0.6 part of rheological additive
0.2 to 0.5 portion of defoaming agent
0-2.0 parts of film-forming assistant
20-30 parts of water.
Further, in the graphene modified rust conversion anticorrosive paint, as a preferable technical scheme, 0.2-0.5 part by weight of graphene is used.
Further, the graphene modified rust conversion anticorrosive paint further comprises 10-20 parts by weight of a graphene dispersion medium, wherein the graphene dispersion medium is tert-butyl alcohol and/or isobutanol.
Furthermore, the sheet diameter of the graphene is 1-20 μm.
Further, the aqueous resin is selected from at least one of epoxy resin, acrylic resin, vinyl chloride resin, styrene-acrylic emulsion or vinyl acetate-acrylic emulsion, and preferably at least one of epoxy resin, styrene-acrylic emulsion or vinyl acetate-acrylic emulsion.
Further, the rust converting agent is at least one selected from inorganic acids, organic acids, and organic complexes, specifically at least one selected from phosphoric acid, potassium ferrocyanide, oxalic acid, chromic acid, tartaric acid, tannic acid, gallic acid, phthalyl acetone, and insoluble complexes formed by iron and a hydroxyl group-containing polymer such as salicylic acid-formaldehyde resin, epoxy phosphoric acid, etc.
Further, the rust converting agent is at least one selected from a group consisting of a tannic acid rust converting agent, a tannic acid phosphoric acid composite rust converting agent, a mangrove tannin series rust converting agent, a potassium ferrocyanide series rust converting agent, a phytic acid series rust converting agent and a chelate series rust converting agent.
Further, the filler is selected from at least one of nano silicon dioxide, nano titanium dioxide and ferrophosphorus powder. The filler can improve the hardness, wear resistance and adhesion of the rust conversion coating.
It will be understood by those skilled in the art that the rheology adjuvants, film-forming adjuvants and defoamers are those commonly used in the coatings art, the selection of which is well known to those skilled in the art.
The technical purpose of the second aspect of the invention is to provide a preparation method of the graphene modified rust conversion anticorrosive paint, which comprises the following steps:
according to the appointed composition, mixing water and a defoaming agent, adding aluminum tripolyphosphate and a filler to disperse, adding a part of rust converting agent and graphene to disperse, adding water-based resin to disperse, adding a film forming aid and a rheological aid to disperse, adding the rest of rust converting agent to disperse, and obtaining the graphene modified rust converting anticorrosive paint.
Further, the preparation method also comprises the step of filtering the finally obtained dispersion liquid.
Further, the preparation method also comprises the step of adding a curing agent into the anticorrosive paint for packaging.
Furthermore, the sheet diameter of the graphene is 1-20 μm, preferably 5-10 μm, and in order to facilitate dispersion in the coating, aqueous graphene slurry is prepared by using tert-butanol and/or isobutanol as a dispersing agent, wherein the graphene content is 3 wt% -6 wt%. The presence of the tert-butyl alcohol and isobutanol can improve the permeability of the rust converting agent to a rust layer.
Further, in the above preparation process, the adding order of each material and the control means of each dispersion step have an important role in the performance of the anticorrosive paint, and the preparation process adopts stirring to disperse each material, as one of specific implementation modes, and the stirring conditions in the preparation process are as follows: adding aluminum tripolyphosphate and a filler, then dispersing at a high speed, wherein the rotating speed is 2000-2500rpm, reducing the rotating speed to 1000-1500rpm after dispersing, adding a part of rust converting agent and graphene, reducing the rotating speed to 800-1000rpm after dispersing, adding water-based resin, adding a film-forming aid and a rheological aid after dispersing, reducing the rotating speed to 500-600rpm again, and adding the rest part of rust converting agent to disperse.
Furthermore, the time for dispersing after adding new raw materials into the mixed system each time is 10-30 min.
Further, as one of specific embodiments, the graphene modified rust conversion anticorrosive coating of the present invention is prepared by the following steps: according to the appointed composition, water and a defoaming agent are mixed, the aluminum tripolyphosphate and the filler are uniformly stirred and added, the rotating speed is adjusted to be 2000-plus-2500 rpm, the dispersion is performed for 20-30min, the rotating speed is reduced to be 1000-plus-1500 rpm, a part of rust converting agent and graphene are added, the dispersion is performed for 20-30min, the rotating speed is reduced to be 800-plus-1000 rpm, water-based resin is added, the dispersion is performed for 10-15min, a film forming aid and a rheological aid are added, the rotating speed is reduced to be 500-plus-600 rpm, the rest part of rust converting agent is added, the dispersion is performed for 10-20min, and the graphene modified rust converting anticorrosive coating.
The technical purpose of the third aspect of the invention is to provide the application of the graphene modified rust conversion anticorrosive paint, and the anticorrosive paint can be used as a paint for rusty substrates to effectively convert rust on the surfaces of the substrates, convert the rust into coordination or chelate coordination, and passivate the rust without further expansion and expansion.
Particularly, the graphene modified rust conversion anticorrosive paint has better matching performance with a zinc-rich coating, the zinc-rich coating is coated on the graphene modified rust conversion anticorrosive paint, the zinc-rich coating is coated by the zinc-rich anticorrosive paint with the metal zinc content of more than or equal to 85% in a dry film, the zinc-rich coating and the zinc-rich anticorrosive paint have good matching performance, a smooth composite coating with good adhesive force is formed, and the cathode protection effect on a base material is realized by virtue of the good electrochemical characteristics of the composite coating.
The embodiment of the invention has the following beneficial effects:
(1) according to the graphene modified rust conversion anticorrosive paint provided by the invention, the rust conversion agent can effectively convert rust on a steel substrate and convert or chelate and coordinate the rust so as to passivate the rust without continuous expansion and expansion.
(2) The graphene is added into the graphene modified rust conversion anticorrosive coating provided by the invention, so that a shielding coating can be added on a steel substrate, external corrosive media are prevented from permeating into the surface of the steel substrate, the anticorrosive service life of the coating is prolonged, the anticorrosive coating can be applied to heavy corrosion protection, the steel substrate and a zinc-rich coating thereon can be communicated, the steel substrate and the zinc-rich coating have good matching performance, and the formed composite coating has good electrochemical characteristics and plays a role in cathode protection. Therefore, the anticorrosive paint can be used independently and can be matched with an epoxy zinc-rich coating for use, the difficulty of rust removal engineering in the maintenance process of bridges, electric towers, petrochemical industry and large steel structure buildings is greatly reduced, a large amount of materials and labor are saved, and the anticorrosive paint has good environmental protection performance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following examples of the invention, after the prepared anticorrosive paint coating and the zinc-rich paint are prepared into the composite coating, the adhesion, the water resistance, the impact resistance, the neutral salt spray resistance and the compatibility of the composite coating are detected, wherein the adhesion is detected according to the specification of 9.4.1 in GB/T5210-.
Graphene modified rust conversion anticorrosive coatings of the invention were prepared in examples 1-3:
example 1
Putting 20 parts of water and 0.3 part of defoaming agent into a paint mixing tank, stirring uniformly, then slowly adding 5 parts of aluminum tripolyphosphate, 1 part of nano silicon dioxide and 8 parts of ferrophosphorus powder, dispersing at 2000rpm for 25min at a high speed, reducing the rotating speed to 1200rpm, then adding 1 part of tannic acid rust converting agent (from Wufeng Chicheng Biotech Co., Ltd.) and 10 parts of graphene slurry, wherein the graphene slurry is 5 wt% suspension prepared by dispersing graphene with the sheet diameter of 1-20 μm in tertiary butanol, reducing the rotating speed to 1000rpm after continuously stirring for 20min, then adding 50 parts of styrene-acrylic emulsion, continuously stirring for 15min, then adding 2 parts of dodecanol ester as a film forming aid and 0.5 part of rheological aid, reducing the rotating speed to 600rpm, adding 2 parts of tannic acid rust converting agent (from Wufeng Chicheng Biotech Co., Ltd.), and continuously stirring for 20min, filtering and packaging to obtain the graphene modified rust conversion anticorrosive paint.
Example 2
Putting 30 parts of water and 0.2 part of defoaming agent into a paint mixing tank, stirring uniformly, then slowly adding 10 parts of aluminum tripolyphosphate, 2 parts of nano titanium dioxide and 5 parts of ferrophosphorus powder, dispersing at 2500rpm for 30min at high speed, reducing the rotating speed to 1500rpm, then adding 2 parts of phosphoric acid-tannic acid composite rust converting agent (the ratio of phosphoric acid to tannic acid is 10: 1) and 8 parts of graphene slurry, wherein the graphene slurry is a suspension with the solid content of 4 wt% prepared by dispersing graphene with the sheet diameter of 5-10 mu m in isobutanol, reducing the rotating speed to 1000rpm after continuously stirring for 20min, then adding 45 parts of aqueous epoxy resin, continuously stirring for 15min, then adding 0.4 part of rheological aid, reducing the rotating speed to 600rpm, adding 4 parts of phosphoric acid-tannic acid composite rust converting agent (the ratio of phosphoric acid to tannic acid is 10: 1), and continuously stirring for 10min, filtering and packaging, and matching with a corresponding epoxy curing agent to obtain the graphene modified rust conversion anticorrosive paint.
Example 3
Putting 25 parts of water and 0.5 part of defoaming agent into a paint mixing tank, stirring uniformly, slowly adding 8 parts of aluminum tripolyphosphate, 1 part of nano silicon dioxide, 1 part of nano titanium dioxide and 12 parts of ferrophosphorus powder filler, dispersing at a high speed of 2500rpm for 30min, reducing the rotating speed to 1500rpm, then adding 3 parts of chelating system rust converting agent (DS-800 type, available from Denson chemical materials Co., Ltd., Tianjin) rust converting agent and 5 parts of graphene slurry, wherein the graphene slurry is a suspension with a solid content of 4 wt% prepared by dispersing graphene with a sheet diameter of 5-10 μm in isobutanol, reducing the rotating speed to 1000rpm after continuing stirring for 30min, then adding 40 parts of acepropyl emulsion, continuing stirring for 15min, then adding 1.5 parts of lauryl alcohol ester as a film forming aid and 0.4 part of rheological aid, reducing the rotating speed to 600rpm, adding 3 parts of chelating system rust converting agent (DS-800 type, purchased from deson chemical materials ltd, tianjin), continuously stirring for 20min, filtering and packaging to obtain the graphene modified rust conversion anticorrosive paint.
Comparative example 1
The parameters and operating conditions were the same as in example 2, except that 2.5 parts of graphene slurry was added.
Comparative example 2
The parameters and operating conditions were the same as in example 2, except that 0.2 part of the graphene slurry was added.
The graphene modified rust conversion anticorrosive coatings prepared in examples 1-3 and comparative examples 1-2 were subjected to performance tests:
the graphene modified rust conversion anticorrosive coatings obtained in examples 1-3 and comparative examples 1-2 were coated on the surface of rusted steel substrate to obtain a coating, and the adhesion, water resistance, impact resistance, and neutral salt spray resistance of the coating were tested, and the results are shown in table 1.
TABLE 1
The graphene modified rust conversion anticorrosive paint obtained in the examples 1-3 and the comparative examples 1-2 is coated on the surface of a rusted steel substrate, and then an epoxy zinc-rich paint is coated on the rusted steel substrate, wherein the epoxy zinc-rich paint is a zinc-rich anticorrosive paint with the metal zinc content of more than or equal to 85% in a dry film, so as to obtain a composite coating, and the matching property (namely appearance and adhesive force), the water resistance, the impact resistance and the neutral salt spray resistance of the composite coating are tested. The results are shown in Table 2.
TABLE 2
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. The graphene modified rust conversion anticorrosive paint is characterized by comprising the following components in parts by weight:
30-50 parts of water-based resin
1.0-6.0 parts of rust converting agent
0.2-1.0 part of graphene
5.0-10.0 parts of aluminum tripolyphosphate
5.0-15.0 parts of filler
0.2-0.6 part of rheological additive
0.2 to 0.5 portion of defoaming agent
1.0-2.0 parts of film-forming assistant
20-30 parts of water.
2. The graphene modified rust conversion anticorrosive paint according to claim 1, further comprising 10-20 parts by weight of a graphene dispersion medium, wherein the graphene dispersion medium is tert-butanol and/or isobutanol.
3. The graphene-modified rust conversion anticorrosive coating according to claim 1, wherein the aqueous resin is at least one selected from epoxy resin, acrylic resin, vinyl chloride resin, styrene-acrylic emulsion, and vinyl acetate-acrylic emulsion.
4. The graphene-modified rust conversion anticorrosive paint of claim 1, wherein the rust conversion agent is at least one selected from the group consisting of tannic acid-based rust conversion agents, tannic acid-phosphoric acid complex rust conversion agents, mangrove tannin series rust conversion agents, potassium ferrocyanide series rust conversion agents, phytic acid series rust conversion agents, and chelate series rust conversion agents.
5. The graphene modified rust conversion anticorrosive paint according to claim 1, wherein the filler is at least one selected from nano silica, nano titanium dioxide and ferrophosphorus powder.
6. The method for preparing the graphene modified rust conversion anticorrosive coating according to any one of claims 1 to 5, comprising the steps of:
according to the appointed composition, mixing water and a defoaming agent, adding aluminum tripolyphosphate and a filler to disperse, adding a part of rust converting agent and graphene to disperse, adding water-based resin to disperse, adding a film forming aid and a rheological aid to disperse, adding the rest of rust converting agent to disperse, and obtaining the graphene modified rust converting anticorrosive paint.
7. The preparation method according to claim 6, wherein the preparation process adopts stirring to disperse the materials, and the specific stirring conditions are as follows: adding aluminum tripolyphosphate and a filler, then dispersing at a high speed, wherein the rotating speed is 2000-2500rpm, reducing the rotating speed to 1000-1500rpm after dispersing, adding a part of rust converting agent and graphene, reducing the rotating speed to 800-1000rpm after dispersing, adding water-based resin, adding a film-forming aid and a rheological aid after dispersing, reducing the rotating speed to 500-600rpm again, and adding the rest part of rust converting agent to disperse.
8. The preparation method according to claim 7, characterized in that it comprises in particular: according to the appointed composition, water and a defoaming agent are mixed, the aluminum tripolyphosphate and the filler are uniformly stirred and added, the rotating speed is adjusted to be 2000-plus-2500 rpm, the dispersion is performed for 20-30min, the rotating speed is reduced to be 1000-plus-1500 rpm, a part of rust converting agent and graphene are added, the dispersion is performed for 20-30min, the rotating speed is reduced to be 800-plus-1000 rpm, water-based resin is added, the dispersion is performed for 10-15min, a film forming aid and a rheological aid are added, the rotating speed is reduced to be 500-plus-600 rpm, the rest part of rust converting agent is added, the dispersion is performed for 10-20min, and the graphene modified rust converting anticorrosive coating.
9. The use of the graphene modified rust conversion anti-corrosive coating of claim 1 as a passivating coating on a rusty substrate surface.
10. The graphene modified rust conversion anticorrosive paint disclosed by claim 1 is matched with a zinc-rich coating to prepare a composite coating which is used as an anticorrosive coating.
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| CN115058171A (en) * | 2022-06-24 | 2022-09-16 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Low-surface-treatment water-based paint for station house steel structure and preparation method thereof |
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| CN115058171A (en) * | 2022-06-24 | 2022-09-16 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Low-surface-treatment water-based paint for station house steel structure and preparation method thereof |
| CN115746666A (en) * | 2022-11-29 | 2023-03-07 | 江苏唐牧智能科技有限公司 | Rusty anticorrosive paint and preparation method thereof |
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Application publication date: 20210608 |