CN117467329A - Epoxy coating for metal substrate - Google Patents
Epoxy coating for metal substrate Download PDFInfo
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- CN117467329A CN117467329A CN202311461649.9A CN202311461649A CN117467329A CN 117467329 A CN117467329 A CN 117467329A CN 202311461649 A CN202311461649 A CN 202311461649A CN 117467329 A CN117467329 A CN 117467329A
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- epoxy
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 46
- 239000002184 metal Substances 0.000 title claims abstract description 46
- 239000000758 substrate Substances 0.000 title claims abstract description 45
- 229920006334 epoxy coating Polymers 0.000 title claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 106
- 239000011248 coating agent Substances 0.000 claims abstract description 104
- 239000003973 paint Substances 0.000 claims abstract description 55
- 238000005260 corrosion Methods 0.000 claims abstract description 19
- 230000007797 corrosion Effects 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000003822 epoxy resin Substances 0.000 claims abstract description 14
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 14
- 239000002086 nanomaterial Substances 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 8
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims abstract description 8
- 229910000165 zinc phosphate Inorganic materials 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 38
- 238000001723 curing Methods 0.000 claims description 32
- 238000005516 engineering process Methods 0.000 claims description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 239000002041 carbon nanotube Substances 0.000 claims description 19
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 18
- 238000009832 plasma treatment Methods 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 9
- 239000003094 microcapsule Substances 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000011664 nicotinic acid Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 230000008901 benefit Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000000643 oven drying Methods 0.000 claims description 5
- 230000000704 physical effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000006460 hydrolysis reaction Methods 0.000 claims description 3
- 238000011416 infrared curing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000001338 self-assembly Methods 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 abstract description 5
- 150000002739 metals Chemical class 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C09D5/24—Electrically-conducting paints
-
- 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
-
- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- 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
-
- 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
- C08K2003/328—Phosphates of heavy metals
Landscapes
- 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 relates to the technical field of epoxy paint, in particular to an epoxy paint for a metal substrate. The technical proposal comprises: an epoxy coating for metal substrates comprising beckoox EP 2307W/45WAMP epoxy resin, barium sulfate, zinc phosphate, aluminum tripolyphosphate, beckoox EH 2189W/50WA curative and water, beckoox EP 2307W/45WAMP epoxy resin 100 g, barium sulfate 20 g, zinc phosphate 6 g, aluminum tripolyphosphate 3 g, water 20 g, beckoox EH 2189W/50WA curative 4 g. The invention has excellent adhesive force and corrosion resistance, high strength and conductivity, high optical transparency, special nano structure and uniform coating quality, so that the coating has wide application prospect in various application fields.
Description
Technical Field
The invention relates to the technical field of epoxy paint, in particular to an epoxy paint for a metal substrate.
Background
Corrosion of metals is a phenomenon in which metals are destroyed by chemical or electrochemical action of an environmental medium. The corrosion of metal is spread across various fields of national economy, and huge loss is brought to the national economy. In industrially developed countries, the direct economic loss caused by corrosion is 1% -4% of the total national economic yield, the annual corrosion and rust steel is about 20% of the yield, and about 30% of the equipment is scrapped due to corrosion.
The metal-based anticorrosive paint is mainly used for anticorrosive coating of steel structures and concrete in underwater and wet and dry alternate environments, wherein the steel structures and the concrete are buried on the outer wall of a pipeline, various chemical equipment metals, sewage treatment metals, aerospace metals and liquid storage tanks and bottom plates.
However, the traditional spraying and drying methods have the problems of uneven coating thickness, puzzlement of bubbles and the like, which can affect the quality and stability of the coating. And the conventional drying method requires a relatively long time to completely cure the paint, which limits the improvement of the production efficiency.
Disclosure of Invention
The invention provides an epoxy coating for a metal substrate, which solves the technical problems.
The scheme for solving the technical problems is as follows:
an epoxy coating for metal substrates comprising beckoox EP 2307W/45WAMP epoxy resin, barium sulfate, zinc phosphate, aluminum tripolyphosphate, beckoox EH 2189W/50WA curative and water, beckoox EP 2307W/45WAMP epoxy resin 100 g, barium sulfate 20 g, zinc phosphate 6 g, aluminum tripolyphosphate 3 g, water 20 g, beckoox EH 2189W/50WA curative 4 g.
The preparation method of the epoxy coating for the metal substrate comprises the following steps:
s1, preparing a coating: selecting proper epoxy resin, curing agent, pigment, filler and other additives, and precisely controlling the proportion and molecular size of each component according to the requirements of microfluidic technology and nano technology;
s2, mixing paint: the components are mixed together according to the proportion, and the components are fully mixed together by using a stirrer or a dispersing machine, so that the consistency and the stability of the paint formula are ensured;
s3, adding carbon nano tubes: the carbon nano tube is added into the paint according to the proportion, and the excellent mechanical, electrical and optical properties of the carbon nano tube are utilized to enhance the strength, the electrical conductivity and the optical transparency of the paint, so that the performance of the paint is improved;
s4, bionic crystallization: the method comprises the steps of utilizing a bionic crystal technology to control the growth mode and morphology of crystals in the coating, and preparing a coating with a special nano structure by simulating a biological structure in the nature; the nano structures obviously improve the hardness, the wear resistance and the corrosion resistance of the coating, so that the coating has excellent performance under various environments;
s5, preparing microcapsules: microencapsulation of the curing agent in the paint formula realizes accurate control of the paint performance;
s6, vacuum defoaming: the paint is subjected to defoaming treatment under a vacuum condition, so that bubbles in the paint are removed, and the compactness and durability of the paint are improved;
s7, plasma treatment: the surface of the metal substrate is cleaned and activated by using a plasma treatment technology, dirt and oxide on the surface of the metal substrate are removed, and the surface of the metal substrate is activated to enable the metal substrate to react with the coating more easily, so that the adhesive force and corrosion resistance of the coating are enhanced, and the adhesive force and corrosion resistance of the coating are enhanced;
s8, a high-pressure airless spraying technology: spraying the mixed paint on the surface of the metal substrate by using a high-pressure airless spraying technology;
s9, infrared curing: the coating is irradiated with infrared rays to initiate polymerization of the thermosensitive agent and the epoxy resin in the coating, thereby curing the coating.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the carbon nanotubes in S3 have unique physical and chemical properties including high strength, high conductivity and high optical transparency, and the carbon nanotubes are added to the coating in a proportion, which is used to enhance the strength, conductivity and optical transparency of the coating.
In the S4, a new material with a special nano structure is constructed by simulating a self-assembly process of crystals in the biological kingdom, and in the preparation process of the coating, the formation and structure of the crystals are influenced by controlling the flowing, evaporating or curing process of the coating on a substrate, and the flowing and evaporating process of the coating on the substrate can influence the space environment and dynamic conditions of crystal growth; the fluidity of the coating determines the thickness and coverage area of crystal growth, and the evaporation rate of the coating influences the time and crystallinity of crystal growth and influences the growth speed and final morphology of the crystal by adjusting environmental factors; environmental factors including temperature, humidity, pressure, light, temperature affects the chemical reaction rate, and thus the growth rate and crystallinity of the crystal; humidity affects the drying process and hydrolysis reaction of the coating, thereby affecting the structure and performance of the crystal; the pressure affects the fluidity and surface tension of the coating, thereby affecting the morphology and alignment of the crystals; the light affects the curing process and optical properties of the coating, thereby affecting the light transmission and color of the crystal.
Further, microencapsulation in S5 is a technology of wrapping small particles in a micro-capsule film, so as to realize accurate control of the performance of the coating; in the coating curing process, the curing agent in the microcapsule is slowly released, so that the curing speed is controlled, and the coating is gradually cured after being coated, so that the durability and the stability of the coating are improved.
Further, in S6, pouring the paint which needs to be defoamed into a vacuum chamber; sealing the vacuum chamber and connecting a vacuum pump; starting a vacuum pump, and pumping out air in the vacuum chamber to form a certain vacuum environment; controlling a certain vacuum degree and keeping a certain defoaming time so as to remove bubbles in the coating; stopping pumping, gradually recovering the air pressure in the vacuum chamber to normal state, and taking out the coating.
Further, the plasma treatment in S7 is a technique of changing chemical and physical properties of the object surface by utilizing chemical reaction and physical effect of plasma; during the paint preparation process, plasma treatment is used to clean and activate the surface of the metal substrate, thereby enhancing the adhesion and corrosion resistance of the paint; the plasma treatment has the advantages of non-contact, easy control, low cost and wide adaptability.
Further, in S8, the coating is formed into a uniform atomized state, and a large amount of gas is not carried in during the spraying process, thereby ensuring the uniformity and quality of the coating.
Further, in S9, the infrared rays penetrate through the surface of the coating, so that the inside is also subjected to the action of heat energy, and uniform curing of the coating is ensured; because of the rapid heating of the infrared rays, compared with the traditional oven drying method, the production period is greatly shortened by using the infrared irradiation, and the flatness and quality of the coating can be ensured.
The beneficial effects of the invention are as follows:
1. by adding the carbon nano tube and combining the bionic crystal technology and the microencapsulation technology, the performances of the coating such as strength, conductivity, optical transparency and the like can be obviously improved. These improvements make the coatings prepared by the new scheme more excellent in terms of abrasion resistance, corrosion resistance, aging resistance and the like.
2. The high-pressure airless spraying technology and the vacuum defoaming method are combined, so that the uniform spraying of the coating and the effective removal of bubbles can be realized, and the compactness and quality of the coating are improved. Compared with the traditional spraying and drying method, the thickness and the mass distribution of the coating can be better controlled.
3. Compared with the traditional oven drying mode, the method has the advantages of higher curing speed and higher energy utilization rate due to the introduction of the infrared irradiation curing technology. Thus, the curing time of the coating can be greatly shortened, the production efficiency is improved, and the cost is reduced.
The foregoing description is only an overview of the present invention, and is intended to provide a more thorough understanding of the present invention, and is to be accorded the full scope of the present invention. Specific embodiments of the present invention are given in detail by the following examples.
Detailed Description
The principles and features of the present invention are described below with examples given for the purpose of illustration only and are not intended to limit the scope of the invention. The invention is more specifically described by way of example in the following paragraphs. Advantages and features of the invention will become more apparent from the following description and from the claims.
The invention provides a technical scheme of an epoxy coating for a metal substrate, which comprises the following steps:
example 1
An epoxy coating for metal substrates comprising beckoox EP 2307W/45WAMP epoxy resin, barium sulfate, zinc phosphate, aluminum tripolyphosphate, beckoox EH 2189W/50WA curative and water, beckoox EP 2307W/45WAMP epoxy resin 100 g, barium sulfate 20 g, zinc phosphate 6 g, aluminum tripolyphosphate 3 g, water 20 g, beckoox EH 2189W/50WA curative 4 g.
An epoxy coating for metal substrates based on example 1, when in use:
under normal conditions, the steel structural member can be quickly dried and stacked only by baking at 80 ℃ for 30 minutes after the epoxy paint is coated, and the improved scheme is 80 ℃ for 10 minutes, so that two thirds of energy consumption and VOC (volatile organic compound) emission are reduced in single-piece production, the environment protection is facilitated, the energy consumption of enterprises is also directly reduced, the production cost is reduced, and the economic benefit is improved.
Example two
The preparation method of the epoxy coating for the metal substrate comprises the following steps:
s1, preparing a coating: selecting proper epoxy resin, curing agent, pigment, filler and other additives, and precisely controlling the proportion and molecular size of each component according to the requirements of microfluidic technology and nano technology;
s2, mixing paint: the components are mixed together according to the proportion, and the components are fully mixed together by using a stirrer or a dispersing machine, so that the consistency and the stability of the paint formula are ensured;
s3, adding carbon nano tubes: the carbon nanotubes are added into the paint in proportion, the excellent mechanical, electrical and optical properties of the carbon nanotubes are utilized to enhance the strength, the electrical conductivity and the optical transparency of the paint, so that the performance of the paint is improved, the carbon nanotubes have unique physical and chemical properties, including high strength, high electrical conductivity and high optical transparency, the carbon nanotubes are added into the paint in proportion, and the strength, the electrical conductivity and the optical transparency of the paint are enhanced by utilizing the properties of the carbon nanotubes;
s4, bionic crystallization: the method comprises the steps of utilizing a bionic crystal technology to control the growth mode and morphology of crystals in the coating, and preparing a coating with a special nano structure by simulating a biological structure in the nature; the nano structures obviously improve the hardness, the wear resistance and the corrosion resistance of the coating, so that the coating has excellent performance under various environments, new materials with special nano structures are constructed by simulating the self-assembly process of crystals in the biological kingdom, in the preparation process of the coating, the formation and the structure of the crystals are influenced by controlling the flowing, evaporating or curing process of the coating on a substrate, and the flowing and the evaporating process of the coating on the substrate can influence the space environment and the dynamic conditions of the crystal growth; the fluidity of the coating determines the thickness and coverage area of crystal growth, and the evaporation rate of the coating influences the time and crystallinity of crystal growth and influences the growth speed and final morphology of the crystal by adjusting environmental factors; environmental factors including temperature, humidity, pressure, light, temperature affects the chemical reaction rate, and thus the growth rate and crystallinity of the crystal; humidity affects the drying process and hydrolysis reaction of the coating, thereby affecting the structure and performance of the crystal; the pressure affects the fluidity and surface tension of the coating, thereby affecting the morphology and alignment of the crystals; the light affects the curing process and optical properties of the coating, thereby affecting the light transmission and color of the crystal;
s5, preparing microcapsules: the curing agent in the paint formula is microencapsulated to realize the accurate control of the paint performance, and the microencapsulation is a technology for wrapping small particles in a micro-capsule film to realize the accurate control of the paint performance; in the coating curing process, the curing agent in the microcapsule is slowly released, so that the curing speed is controlled, the coating is gradually cured after being coated, and the durability and the stability of the coating are improved;
s6, vacuum defoaming: the paint is placed under vacuum condition for defoaming treatment, bubbles in the paint are removed, the compactness and durability of the paint are improved, and the paint needing the defoaming treatment is poured into a vacuum chamber; sealing the vacuum chamber and connecting a vacuum pump; starting a vacuum pump, and pumping out air in the vacuum chamber to form a certain vacuum environment; controlling a certain vacuum degree and keeping a certain defoaming time so as to remove bubbles in the coating; stopping pumping, gradually recovering the air pressure in the vacuum chamber to a normal state, and taking out the coating;
s7, plasma treatment: the method comprises the steps of cleaning and activating the surface of a metal substrate by using a plasma treatment technology, removing dirt and oxide on the surface of the metal substrate, and activating the surface of the metal substrate to enable the surface to react with a coating more easily, so that the adhesive force and corrosion resistance of the coating are enhanced, and the plasma treatment is a technology for changing the chemical and physical characteristics of the surface of an object by utilizing the chemical reaction and physical effect of plasma; during the paint preparation process, plasma treatment is used to clean and activate the surface of the metal substrate, thereby enhancing the adhesion and corrosion resistance of the paint; the plasma treatment has the advantages of non-contact, easy control, low cost and wide adaptability;
s8, a high-pressure airless spraying technology: the mixed paint is sprayed on the surface of a metal substrate by using a high-pressure airless spraying technology, so that the paint forms a uniform atomization state, and a large amount of gas is not carried in the spraying process, thereby ensuring the uniformity and quality of the paint;
s9, infrared curing: the coating is irradiated by infrared rays, and polymerization reaction of a thermosensitive agent and epoxy resin in the coating is initiated, so that the coating is cured, and the infrared rays penetrate through the surface of the coating, so that the inside is also subjected to the action of heat energy, and uniform curing of the coating is ensured; because of the rapid heating of the infrared rays, compared with the traditional oven drying method, the production period is greatly shortened by using the infrared irradiation, and the flatness and quality of the coating can be ensured.
An epoxy coating for metal substrates based on example 1, when in use:
by adding the carbon nano tube and combining the bionic crystal technology and the microencapsulation technology, the performances of the coating such as strength, conductivity, optical transparency and the like can be obviously improved. These improvements make the coatings prepared by the new scheme more excellent in terms of abrasion resistance, corrosion resistance, aging resistance and the like.
The high-pressure airless spraying technology and the vacuum defoaming method are combined, so that the uniform spraying of the coating and the effective removal of bubbles can be realized, and the compactness and quality of the coating are improved. Compared with the traditional spraying and drying method, the thickness and the mass distribution of the coating can be better controlled.
Compared with the traditional oven drying mode, the method has the advantages of higher curing speed and higher energy utilization rate due to the introduction of the infrared irradiation curing technology. Thus, the curing time of the coating can be greatly shortened, the production efficiency is improved, and the cost is reduced.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way; those of ordinary skill in the art will readily implement the invention as described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present invention are possible in light of the above teachings without departing from the scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the present invention.
Claims (9)
1. An epoxy coating for a metal substrate comprising beckoox EP 2307W/45WAMP epoxy resin, barium sulfate, zinc phosphate, aluminum tripolyphosphate, beckoox EH 2189W/50WA curative and water, characterized in that: BECKOPOX EP 2307W/45WAMP epoxy resin 100 g, barium sulfate 20 g, zinc phosphate 6 g, aluminum tripolyphosphate 3 g, water 20 g, beckopoox EH 2189W/50WA curative 4 g.
2. The preparation method of the epoxy coating for the metal substrate is characterized by comprising the following steps of:
s1, preparing a coating: selecting proper epoxy resin, curing agent, pigment, filler and other additives, and precisely controlling the proportion and molecular size of each component according to the requirements of microfluidic technology and nano technology;
s2, mixing paint: the components are mixed together according to the proportion, and the components are fully mixed together by using a stirrer or a dispersing machine, so that the consistency and the stability of the paint formula are ensured;
s3, adding carbon nano tubes: the carbon nano tube is added into the paint according to the proportion, and the excellent mechanical, electrical and optical properties of the carbon nano tube are utilized to enhance the strength, the electrical conductivity and the optical transparency of the paint, so that the performance of the paint is improved;
s4, bionic crystallization: the method comprises the steps of utilizing a bionic crystal technology to control the growth mode and morphology of crystals in the coating, and preparing a coating with a special nano structure by simulating a biological structure in the nature; the nano structures obviously improve the hardness, the wear resistance and the corrosion resistance of the coating, so that the coating has excellent performance under various environments;
s5, preparing microcapsules: microencapsulation of the curing agent in the paint formula realizes accurate control of the paint performance;
s6, vacuum defoaming: the paint is subjected to defoaming treatment under a vacuum condition, so that bubbles in the paint are removed, and the compactness and durability of the paint are improved;
s7, plasma treatment: the surface of the metal substrate is cleaned and activated by using a plasma treatment technology, dirt and oxide on the surface of the metal substrate are removed, and the surface of the metal substrate is activated to enable the metal substrate to react with the coating more easily, so that the adhesive force and corrosion resistance of the coating are enhanced, and the adhesive force and corrosion resistance of the coating are enhanced;
s8, a high-pressure airless spraying technology: spraying the mixed paint on the surface of the metal substrate by using a high-pressure airless spraying technology;
s9, infrared curing: the coating is irradiated with infrared rays to initiate polymerization of the thermosensitive agent and the epoxy resin in the coating, thereby curing the coating.
3. The method for preparing the epoxy coating for the metal substrate according to claim 2, wherein: the carbon nano tube in S3 has unique physical and chemical properties including high strength, high conductivity and high optical transparency, and the carbon nano tube is added into the coating according to the proportion, so that the strength, the conductivity and the optical transparency of the coating are enhanced by utilizing the properties of the carbon nano tube.
4. The method for preparing the epoxy coating for the metal substrate according to claim 2, wherein: s4, constructing a new material with a special nano structure by simulating a self-assembly process of crystals in the biological kingdom, wherein in the preparation process of the coating, the formation and structure of the crystals are influenced by controlling the flowing, evaporating or curing process of the coating on a substrate, and the flowing and evaporating process of the coating on the substrate can influence the space environment and dynamic conditions of crystal growth; the fluidity of the coating determines the thickness and coverage area of crystal growth, and the evaporation rate of the coating influences the time and crystallinity of crystal growth and influences the growth speed and final morphology of the crystal by adjusting environmental factors; environmental factors including temperature, humidity, pressure, light, temperature affects the chemical reaction rate, and thus the growth rate and crystallinity of the crystal; humidity affects the drying process and hydrolysis reaction of the coating, thereby affecting the structure and performance of the crystal; the pressure affects the fluidity and surface tension of the coating, thereby affecting the morphology and alignment of the crystals; the light affects the curing process and optical properties of the coating, thereby affecting the light transmission and color of the crystal.
5. The method for preparing the epoxy coating for the metal substrate according to claim 2, wherein: s5, microencapsulation is a technology for wrapping small particles in a micro-capsule film, so that the accurate control of the coating performance is realized; in the coating curing process, the curing agent in the microcapsule is slowly released, so that the curing speed is controlled, and the coating is gradually cured after being coated, so that the durability and the stability of the coating are improved.
6. The method for preparing the epoxy coating for the metal substrate according to claim 2, wherein: s6, pouring the coating to be defoamed into a vacuum chamber; sealing the vacuum chamber and connecting a vacuum pump; starting a vacuum pump, and pumping out air in the vacuum chamber to form a certain vacuum environment; controlling a certain vacuum degree and keeping a certain defoaming time so as to remove bubbles in the coating; stopping pumping, gradually recovering the air pressure in the vacuum chamber to normal state, and taking out the coating.
7. The method for preparing the epoxy coating for the metal substrate according to claim 2, wherein: the plasma treatment in S7 is a technique of changing chemical and physical properties of the surface of the object by using chemical reaction and physical effect of plasma; during the paint preparation process, plasma treatment is used to clean and activate the surface of the metal substrate, thereby enhancing the adhesion and corrosion resistance of the paint; the plasma treatment has the advantages of non-contact, easy control, low cost and wide adaptability.
8. The method for preparing the epoxy coating for the metal substrate according to claim 2, wherein: and S8, the coating is in a uniform atomization state, and a large amount of gas is not carried in the spraying process, so that the uniformity and quality of the coating are ensured.
9. The method for preparing the epoxy coating for the metal substrate according to claim 2, wherein: s9, infrared rays penetrate through the surface of the paint, so that the interior is also subjected to the action of heat energy, and uniform curing of the paint is ensured; because of the rapid heating of the infrared rays, compared with the traditional oven drying method, the production period is greatly shortened by using the infrared irradiation, and the flatness and quality of the coating can be ensured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311461649.9A CN117467329A (en) | 2023-11-06 | 2023-11-06 | Epoxy coating for metal substrate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311461649.9A CN117467329A (en) | 2023-11-06 | 2023-11-06 | Epoxy coating for metal substrate |
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