CN112625469A - High-temperature-resistant metal plate adopting inorganic coating and preparation method thereof - Google Patents
High-temperature-resistant metal plate adopting inorganic coating and preparation method thereof Download PDFInfo
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- CN112625469A CN112625469A CN201910907606.6A CN201910907606A CN112625469A CN 112625469 A CN112625469 A CN 112625469A CN 201910907606 A CN201910907606 A CN 201910907606A CN 112625469 A CN112625469 A CN 112625469A
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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
- C09D5/18—Fireproof paints including high temperature resistant 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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Abstract
The invention discloses a high-temperature-resistant metal plate adopting an inorganic coating, which comprises a metal base material and the inorganic coating coated on the base material, wherein the inorganic coating comprises the following components in parts by weight: 25-45 parts of nano silica sol, 25-45 parts of organosilane, 5-15 parts of functional filler, 5-15 parts of water, 10-20 parts of inorganic pigment, 0.1-3 parts of functional additive and 0.1-2 parts of thickening agent. The product has stable heat resistance, high weather resistance, high chemical resistance, high wear resistance and high hardness, and reaches A1-grade fireproof performance.
Description
Technical Field
The invention relates to the technical field of surface engineering, in particular to a high-temperature-resistant metal plate adopting an inorganic coating and a preparation method thereof.
Background
The metal material is a generic term for a metal element or a material having a metal characteristic and mainly composed of a metal element, and includes a pure metal, an alloy, an intermetallic compound, a special metal material, and the like. With the continuous progress of science and technology, the places where metal materials are used are more and more extensive, such as the fields of automobile industry, building material industry, kitchen supplies, public space and rail transit facilities.
The metal material is usually used as a base material in the form of a metal plate, and although the metal base material has good fire resistance, hardness and durability, the corrosion resistance and weather resistance are poor, and during long-term use, the high temperature has a great influence on the metal base material, the service life of the metal base material is seriously influenced, and the safe operation of equipment is also influenced. The coating layer is usually used for protecting the metal substrate in the prior art, but the traditional coating layer cannot provide effective high-temperature protection effect for the metal substrate, after the coating layer is used for a period of time, the protection function of the coating layer is gradually weakened under the action of ultraviolet rays, and the function of a product cannot be kept for a long time or the function of the metal substrate product cannot be improved.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide a high-temperature resistant metal plate adopting an inorganic coating, which has stable heat resistance, high weather resistance, high chemical resistance, high wear resistance and high hardness, and the product reaches A1-grade fireproof performance, and can be widely applied to the fields of building curtain walls, fireproof decoration materials, high-temperature resistant equipment manufacturing, weapon manufacturing, public spaces, rail transit facilities and the like; in addition, the invention also provides a preparation method of the high-temperature-resistant metal plate adopting the inorganic coating.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a high-temperature-resistant metal plate adopting an inorganic coating, which comprises a metal base material and the inorganic coating coated on the base material, wherein the inorganic coating comprises the following components in parts by mass: 25-45 parts of nano silica sol, 25-45 parts of organosilane, 5-15 parts of functional filler, 5-15 parts of water, 10-20 parts of inorganic pigment, 0.1-3 parts of functional additive and 0.1-2 parts of thickening agent.
Preferably, the organosilane is N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylethoxysilane, methyltrimethoxysilane, ethyltriethoxysilane, tetraethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropylmethyldimethoxysilane, 3- [ (2,3) -glycidoxy ] propylmethyldimethoxysilane, 3- (2, 3-glycidoxypropyl) trimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, glycidyloxypropyltrimethoxysilane, glycidyloxyethyltrimethoxysilane, glycidyloxypropylmethyldiethoxysilane, glycidyloxypropylmethyldimethoxysilane, glycidyloxypropyltrimethoxysilane, glycidyloxyethyltrimethoxysilane, One or more of N-phenyl-3-aminopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, methacryloxypropyltriethoxysilane, methacryloxypropylmethyldiethoxysilane, 3- (methacryloxy) propylmethyldimethoxysilane, methacryloxypropyltris (trimethylsiloxy) silane, and organosilanes containing acryloyl groups or methacryloyl groups.
Preferably, the thickener is fumed silica having a particle size of less than 1 μm.
The functional filler is two or more of potassium titanate, silicon carbide, silicon nitride, boron nitride, mica powder and alumina, and the functional filler can prevent the coating from cracking, control the viscosity of the coating and improve the high-temperature resistance of the coating. The inorganic pigment is one or more of cobalt blue, manganese violet, titanium dioxide, titanium chromium brown, cadmium yellow, cadmium red, iron oxide yellow and copper chromium black.
The functional auxiliary agent comprises a leveling agent, a defoaming agent and organic silane so as to improve the performance of the coating. Wherein, the leveling agent can be used for improving the leveling property of the surface of the film, and can be selected from polyether modified dimethyl polysiloxane copolymer, polyester modified dimethyl polysiloxane copolymer or polyether modified methyl alkyl polysiloxane copolymer; the defoaming agent and the organosilane are commercially available products; the organosilane is used to enhance the adhesive strength with the substrate when a coating film is formed.
Preferably, the inorganic coating layer has a thickness of 20 to 45 μm.
Preferably, the metal substrate is carbon steel, stainless steel, aluminum alloy, or white iron.
In a second aspect of the present invention, there is provided a method for preparing the above high temperature resistant metal plate using an inorganic coating, comprising the steps of:
s1, surface treatment of the metal base material:
removing oxide skin on the surface of a metal substrate to ensure that the surface of the substrate is in the original metal color and has the surface roughness of Ry12.5-125, cleaning the substrate by using a solvent, and removing dust by using an air spray gun for later use;
s2, spraying an inorganic coating:
spraying inorganic coating on the surface of the metal base material by using a roller coating method, an air spraying method or an electrostatic spraying method, wherein the dry film thickness is 20-45 mu m, standing for 2 hours in a drying room of 10-45 ℃, and then putting into a drying oven for baking or drying at normal temperature in an environment of 5-45 ℃.
Preferably, in step S2, the baking process in the drying oven is as follows: baking at 50 deg.C for 20 min, gradually heating to 120 deg.C for 20 min, and gradually heating to 180 deg.C for 30 min.
Preferably, in the step S2, when the drying is performed at room temperature in an environment of 5-45 degrees, the surface drying time is 2-3 hours, and the complete drying time is 7 days.
Preferably, in the step S2, before spraying, the inorganic paint is filtered by using a 300-600 mesh screen; during the spraying process, the inorganic coating needs to be continuously stirred.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the inorganic coating is sprayed on the metal base material, the formula of the inorganic coating does not contain organic components and harmful substances, safe and healthy products and production environments are provided for customers, and the inorganic coating has high temperature resistance and flame retardance and has strong adhesive force with the surface of the metal base material when a coating is formed; the metal substrate coated with the above inorganic coating has stable heat resistance and excellent properties such as high weather resistance, high chemical resistance, high abrasion resistance, high hardness, etc., and can be widely used in the fields of building curtain walls, fire-resistant decorative materials, high-temperature resistant equipment manufacturing, weapon manufacturing, public spaces, rail transit facilities, etc.
Detailed Description
Example 1
The high-temperature-resistant metal plate adopting the inorganic coating comprises a metal base material and the inorganic coating coated on the base material, wherein the metal base material is a carbon steel plate, and the thickness of the inorganic coating is 32 mu m, and the inorganic coating comprises the following components in parts by mass: 39 parts of nano silica sol, 45 parts of organosilane, 8 parts of functional filler, 12 parts of water, 20 parts of inorganic pigment, 2.1 parts of functional auxiliary agent and 1.2 parts of thickening agent.
In the formula, the organosilane is methyltrimethoxysilane. The thickener is fumed silica with particle size less than 1 μm. The functional filler is a mixture of boron nitride, silicon nitride, potassium titanate and alumina. The inorganic pigment is a mixture of titanium dioxide and iron oxide red. The functional auxiliary agent comprises a leveling agent, a defoaming agent and organosilane, wherein the leveling agent is polyether modified dimethyl polysiloxane copolymer, and the defoaming agent and the organosilane are commercially available products.
The preparation method of the inorganic coating comprises the following steps:
s1, adding nano-silica sol and distilled water which are weighed according to corresponding proportion into a closed reaction container, dispersing for 10 minutes at the speed of 150-300rpm, and controlling the liquid surface temperature at 15-45 ℃;
s2, adding functional filler and inorganic pigment into a closed reaction container, dispersing at a high speed of 7000rpm at 5000-45 ℃ for 40-50 minutes to form a uniformly dispersed mixed solution;
s3, adding functional auxiliary agent and organic silane into the mixed solution obtained in the step S2, sealing the reaction container, controlling the liquid surface temperature at 20-50 ℃, dispersing and homogenizing at a high speed of 5000-7000rpm for 2-5 hours, completing the reaction when the viscosity of the mixture reaches 12-16 seconds (detected by a Ford cup), cooling, and filtering through a 300-mesh 600-mesh steel wire mesh to obtain the inorganic coating.
The preparation method of the high-temperature resistant metal plate adopting the inorganic coating comprises the following steps:
s1, surface treatment of the metal base material:
removing oxide skin on the surface of the metal base material to ensure that the surface of the base material is in the original metal color, reaches the cleanness Sa2.5 grade specified in GB8923 and has the surface roughness of Ry12.5-125, cleaning the surface of the base material with ethanol or isopropanol to remove dust, foreign matters, oil and other components on the use surface of the die base material, and removing dust with an air spray gun for later use;
s2, spraying an inorganic coating:
spraying an inorganic coating on the surface of a metal substrate by using an air spraying method, standing for 2 hours in a drying room of 10-45 ℃, then putting the metal substrate into a drying oven for baking, baking for 20 minutes at 50 ℃, gradually heating to 120 ℃ for 20 minutes, and finally gradually heating to 180 ℃ for 30 minutes; wherein before spraying, a 300-600 mesh screen is used for filtering the inorganic coating; during the spraying process, the inorganic coating needs to be continuously stirred.
Example 2
The high-temperature-resistant metal plate adopting the inorganic coating comprises a metal base material and the inorganic coating coated on the base material, wherein the metal base material is an aluminum plate material, and the thickness of the inorganic coating is 45 mu m, and the inorganic coating comprises the following components in parts by mass: 25 parts of nano silica sol, 36 parts of organosilane, 5 parts of functional filler, 5 parts of water, 10 parts of inorganic pigment, 0.1 part of functional auxiliary agent and 0.1 part of thickening agent.
In the formula, the organosilane is ethyltriethoxysilane. The thickener is fumed silica with particle size less than 1 μm. The functional filler is a mixture of alumina, potassium titanate and silicon carbide. The inorganic pigment is titanium dioxide and copper chromium black. The functional auxiliary agent comprises a leveling agent, a defoaming agent and organic silane, wherein the leveling agent is polyester modified dimethyl polysiloxane copolymer, and the defoaming agent and the organic silane are commercially available products.
The preparation method of the inorganic paint can refer to example 1.
The preparation method of the high-temperature resistant metal plate adopting the inorganic coating comprises the following steps:
s1, surface treatment of the metal base material:
removing oxide skin on the surface of the metal base material to ensure that the surface of the base material is in the original metal color, reaches the cleanness Sa2.5 grade specified in GB8923 and has the surface roughness of Ry12.5-125, cleaning the surface of the base material with ethanol or isopropanol to remove dust, foreign matters, oil and other components on the use surface of the die base material, and removing dust with an air spray gun for later use;
s2, spraying an inorganic coating:
spraying the inorganic coating on the surface of a metal substrate by using an electrostatic spraying method, standing for 2 hours in a drying room of 10-45 ℃, and then drying at normal temperature in an environment of 5-45 ℃, wherein the surface drying time is 2-3 hours, and the complete drying time is 7 days; wherein before spraying, a 300-600 mesh screen is used for filtering the inorganic coating; during the spraying process, the inorganic coating needs to be continuously stirred.
Example 3
The high-temperature-resistant metal plate adopting the inorganic coating comprises a metal base material and the inorganic coating coated on the base material, wherein the metal base material is a cold-rolled steel plate material, and the thickness of the inorganic coating is 20 mu m, wherein the inorganic coating comprises the following components in parts by mass: 45 parts of nano silica sol, 25 parts of organosilane, 10 parts of functional filler, 15 parts of water, 15 parts of inorganic pigment, 3 parts of functional auxiliary agent and 2 parts of thickening agent.
In the above formula, the organosilane is tetraethoxysilane. The thickener is fumed silica with particle size less than 1 μm. The functional filler is a mixture of potassium titanate, boron nitride and alumina. The inorganic pigment is cobalt blue. The functional auxiliary agent comprises a leveling agent, a defoaming agent and organosilane, wherein the leveling agent is polyether modified methyl alkyl polysiloxane copolymer, and the defoaming agent and the organosilane are commercially available products.
The preparation method of the inorganic paint can refer to example 1.
The above-mentioned method for producing a refractory metal plate using an inorganic coating is described in example 1.
Test examples
The high temperature resistant metal plates with inorganic coatings obtained in examples 1 to 3 were subjected to a performance test, the specific test method being as follows:
(1) the dry adhesion of the coating is measured according to the regulation in GB/T9286, and the grid spacing is 1 mm;
(2) the coating film hardness is measured according to the regulation of the B method in GB/T6739, and the test result is evaluated according to 4.4.6 in GB/T6739;
(3) the high temperature resistance, the hydrochloric acid resistance, the nitric acid resistance, the solvent resistance, the mortar resistance, the salt spray corrosion resistance and the manual accelerated weather resistance test of the coating are carried out according to the relevant regulations in GB 5237.5;
specific test results are shown in table 1.
TABLE 1
As can be seen from the test results in Table 1, the inorganic coating of the present invention has stable heat resistance and high weatherability, high chemical resistance, high abrasion resistance, high hardness, etc. by spraying the inorganic coating on the metal substrate; and the product has low surface adhesion, strong anti-icing capability and self-cleaning performance.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (9)
1. The high-temperature-resistant metal plate adopting the inorganic coating is characterized by comprising a metal base material and the inorganic coating coated on the base material, wherein the inorganic coating comprises the following components in parts by mass: 25-45 parts of nano silica sol, 25-45 parts of organosilane, 5-15 parts of functional filler, 5-15 parts of water, 10-20 parts of inorganic pigment, 0.1-3 parts of functional additive and 0.1-2 parts of thickening agent.
2. The refractory metal plate as defined in claim 1, wherein the organic silane is N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylethoxysilane, methyltrimethoxysilane, ethyltriethoxysilane, tetraethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropylmethyldimethoxysilane, 3- [ (2,3) -glycidoxy ] propylmethyldimethoxysilane, 3- (2, 3-glycidoxypropyl) trimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, methacryloxypropyltriethoxysilane, methacryloxypropylmethyldiethoxysilane, 3- (methacryloyloxy) propylmethyldimethoxysilane, methacryloxypropyltris (trimethylsiloxy) silane, organosilanes containing acryloyl groups or methacryloyl groups, and the like.
3. The refractory metal plate as recited in claim 2, wherein the thickener is fumed silica having a particle size of less than 1 μm.
4. The refractory metal plate as recited in claim 3, wherein the inorganic coating layer has a thickness of 20 to 45 μm.
5. The refractory metal plate with inorganic coating according to any one of claims 1 to 4, wherein the metal substrate is carbon steel, stainless steel, aluminum alloy or white iron.
6. A method for preparing a refractory metal plate using an inorganic coating according to claim 1, comprising the steps of:
s1, surface treatment of the metal base material:
removing oxide skin on the surface of a metal substrate to ensure that the surface of the substrate is in the original metal color and has the surface roughness of Ry12.5-125, cleaning the substrate by using a solvent, and removing dust by using an air spray gun for later use;
s2, spraying an inorganic coating:
spraying inorganic coating on the surface of metal substrate, with a dry film thickness of 20-45 μm, standing for 2 hr in a drying room of 10-45 deg.C, and oven drying or drying at normal temperature of 5-45 deg.C in a drying oven.
7. The method for preparing refractory metal plate with inorganic coating according to claim 6, wherein the baking process in the drying oven in step S2 is as follows: baking at 50 deg.C for 20 min, gradually heating to 120 deg.C for 20 min, and gradually heating to 180 deg.C for 30 min.
8. The method of claim 6, wherein in the step S2, when the metal plate is dried at 5-45 degrees and normal temperature, the surface drying time is 2-3 hours and the complete drying time is 7 days.
9. The method as claimed in claim 6, wherein in step S2, the inorganic coating is filtered by a 300-600 mesh screen before spraying; during the spraying process, the inorganic coating needs to be continuously stirred.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114656809A (en) * | 2022-03-15 | 2022-06-24 | 北京固瑞恩科技有限公司 | Inorganic ceramic coating for building durability protection |
| CN115595061A (en) * | 2022-11-09 | 2023-01-13 | 山西北化关铝化工有限公司（Cn） | Organic-inorganic composite coating and preparation method thereof, organic-inorganic composite coating and perforating bullet |
| CN116355528A (en) * | 2023-05-07 | 2023-06-30 | 广州希森美克新材料科技股份有限公司 | Water-based high-temperature-resistant anticorrosive paint and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038335A (en) * | 2015-07-08 | 2015-11-11 | 刘晓东 | Room-temperature curable inorganic coating and manufacturing method thereof |
-
2019
- 2019-09-24 CN CN201910907606.6A patent/CN112625469A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038335A (en) * | 2015-07-08 | 2015-11-11 | 刘晓东 | Room-temperature curable inorganic coating and manufacturing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114656809A (en) * | 2022-03-15 | 2022-06-24 | 北京固瑞恩科技有限公司 | Inorganic ceramic coating for building durability protection |
| CN115595061A (en) * | 2022-11-09 | 2023-01-13 | 山西北化关铝化工有限公司（Cn） | Organic-inorganic composite coating and preparation method thereof, organic-inorganic composite coating and perforating bullet |
| CN116355528A (en) * | 2023-05-07 | 2023-06-30 | 广州希森美克新材料科技股份有限公司 | Water-based high-temperature-resistant anticorrosive paint and preparation method thereof |
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