CN110760857A - Surface treatment process of heating radiator - Google Patents
Surface treatment process of heating radiator Download PDFInfo
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- CN110760857A CN110760857A CN201911161618.5A CN201911161618A CN110760857A CN 110760857 A CN110760857 A CN 110760857A CN 201911161618 A CN201911161618 A CN 201911161618A CN 110760857 A CN110760857 A CN 110760857A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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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
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/60—Adding a layer before coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/02—Inorganic fillers used for pigmentation effect, e.g. metallic effect
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
- B05D2601/24—Titanium dioxide, e.g. rutile
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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention provides a surface treatment process of a heating radiator, which comprises the following steps: (1) degreasing: degreasing the surface of the radiator by using a degreasing agent to remove oil stains on the surface of the radiator; (2) acid washing: placing the radiator after oil stain removal into a pickling tank, and pickling with a pickling solution; (3) alkali washing: carrying out alkali washing on the surface of the radiator by adopting a sodium hydroxide solution with the mass concentration of 2-5%; (4) washing with water: washing the radiator subjected to alkali washing with water and drying in the air; (5) blackening treatment: carrying out blackening treatment on the radiator washed by the water in the step (4) by adopting a blackening solution; (6) washing with water: washing the blackened radiator with hot water again and drying; (7) powder spraying: uniformly spraying anticorrosive powder paint on the surface of the radiator washed in the step (6) by using electrostatic powder spraying equipment to form a uniform powder coating; (8) baking: and (4) sending the sprayed radiator into a baking furnace for baking, leveling and curing.
Description
Technical Field
The invention relates to the technical field of radiator processing, in particular to a surface treatment process of a heating radiator.
Background
Along with the rapid growth of national economic development of China, the income of residents is increased year by year, the living standard and housing conditions are further improved, and the heating radiator is widely used in the northern area due to the characteristics of large heat dissipation surface area, high heat efficiency, comfortable temperature and the like; in order to ensure the aesthetic property and the corrosion resistance of the radiator, the surface of the radiator needs to be treated; in the prior art, when the surface of the heater is sprayed, the surface of the radiator is sprayed after being washed by water and acid, and polyester powder coating is mainly adopted for spraying during spraying, so that the sprayed radiator is easy to change color gradually or the coating is stripped off after being used for a long time, and the radiator is easy to fall off and can not well meet the use requirement.
Disclosure of Invention
The invention provides a surface treatment process of a heating radiator aiming at the technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme: a surface treatment process for a heating radiator is characterized by comprising the following steps:
(1) degreasing: degreasing the surface of the radiator by using a degreasing agent to remove oil stains on the surface of the radiator;
(2) acid washing: placing the radiator after oil stain removal into a pickling tank, pickling with pickling solution, and adding a corrosion inhibitor into the pickling solution;
(3) alkali washing: carrying out alkali washing on the surface of the radiator by adopting a sodium hydroxide solution with the mass concentration of 2-5%;
(4) washing with water: washing the radiator subjected to alkali washing with water and drying in the air;
(5) blackening treatment: carrying out blackening treatment on the radiator washed by the water in the step (4) by adopting a blackening solution;
(6) washing with water: washing the blackened radiator with hot water at 40-50 deg.C again and drying;
(7) powder spraying: uniformly spraying anticorrosive powder paint on the surface of the radiator washed in the step (6) by using electrostatic powder spraying equipment to form a uniform powder coating;
(8) baking: and (4) sending the powder sprayed radiator into a baking furnace for baking, leveling and curing.
The blackening solution comprises copper sulfate, selenium dioxide, nickel sulfate, zinc sulfate, phosphoric acid, sodium thiosulfate, citric acid, boric acid, an emulsifier and a complexing agent, wherein the concentration of copper sulfate in the blackening solution is 3-6g/L, the concentration of selenium dioxide is 2-4g/L, the concentration of nickel sulfate is 1-3g/L, the concentration of zinc sulfate is 3-5g/L, the concentration of zinc nitrate is 3-5g/L, the concentration of phosphoric acid is 10-15g/L, the concentration of sodium thiosulfate is 2-5g/L, the concentration of citric acid is 8-12g/L, the concentration of boric acid is 3-5g/L, the concentration of the emulsifier is 1-2g/L, the concentration of the complexing agent is 1-2g/L, the temperature of the blackening treatment is 55-65 ℃, the blackening treatment time is 2-5 min.
The baking temperature in the baking furnace is 180-200 ℃, and the heat preservation time is 15-20 min.
The anticorrosive powder coating is prepared from the following raw materials in parts by weight: 30-40 parts of phenolic modified epoxy resin, 15-25 parts of ceramic microspheres, 600 parts of saturated resin 210-containing materials, 50-300 parts of special pigment, 15-25 parts of rutile titanium oxide, 0.2-0.6 part of curing accelerator, 0.4-0.6 part of anti-yellow benzoin, 3-5 parts of acetylacetone iridium, 1-2 parts of aminated graphene, 0.5-1.2 parts of polysiloxane defoamer, 0.6-1.2 parts of wetting dispersant and 0.3-0.6 part of thickener.
The preparation method of the aminated graphene comprises the following steps: dissolving graphene in a dispersing agent, performing ultrasonic dispersion for 1-2h to obtain a stable and uniformly dispersed graphene dispersion liquid, adding an amination reagent into the graphene dispersion liquid, reacting at 60-90 ℃ for 12-18h, performing vacuum filtration on the reacted dispersion liquid, washing impurities with the dispersing agent and deionized water, and drying the product in a vacuum oven at 60-80 ℃ to obtain aminated graphene; wherein, by weight, the graphene: dispersing agent: amination reagent ═ 1: (500-1000): (20-40), the dispersant is at least one of N, N-dimethylformamide, N-dimethylacetamide and DMSO, and the amination reagent is at least one of triethylamine, butyl triamine and dicyandiamide.
The saturated resin is low-viscosity solid saturated carboxyl polyester, the glass transition temperature of the saturated resin is 50-65 ℃, and the softening point temperature of the saturated resin is 58-130 ℃.
The ceramic microspheres are hollow microsphere ceramic powder with the particle size of 10-45 mu m.
The invention has the beneficial effects that: according to the invention, the radiator is subjected to blackening treatment before spraying, so that a blackening oxidation resistant film is formed on the surface of the radiator before spraying, and then the anticorrosive powder coating prepared by the method is sprayed, so that the prepared radiator is attractive in appearance and can meet the anticorrosive performance of the radiator, and the sprayed coating is not easy to fall off and has a good using effect.
Detailed Description
The invention is further illustrated by the following examples:
a surface treatment process for a heating radiator is characterized by comprising the following steps:
(1) degreasing: degreasing the surface of the radiator by using a degreasing agent to remove oil stains on the surface of the radiator;
(2) acid washing: placing the radiator after oil stain removal into a pickling tank, pickling with pickling solution, and adding a corrosion inhibitor into the pickling solution;
(3) alkali washing: carrying out alkali washing on the surface of the radiator by adopting a sodium hydroxide solution with the mass concentration of 2-5%;
(4) washing with water: washing the radiator subjected to alkali washing with water and drying in the air;
(5) blackening treatment: carrying out blackening treatment on the radiator washed by the water in the step (4) by adopting a blackening solution;
(6) washing with water: washing the blackened radiator with hot water at 40-50 deg.C again and drying;
(7) powder spraying: uniformly spraying anticorrosive powder paint on the surface of the radiator washed in the step (6) by using electrostatic powder spraying equipment to form a uniform powder coating;
(8) baking: and (4) sending the powder sprayed radiator into a baking furnace for baking, leveling and curing.
The blackening solution comprises copper sulfate, selenium dioxide, nickel sulfate, zinc sulfate, phosphoric acid, sodium thiosulfate, citric acid, boric acid, an emulsifier and a complexing agent, wherein the concentration of copper sulfate in the blackening solution is 3-6g/L, the concentration of selenium dioxide is 2-4g/L, the concentration of nickel sulfate is 1-3g/L, the concentration of zinc sulfate is 3-5g/L, the concentration of zinc nitrate is 3-5g/L, the concentration of phosphoric acid is 10-15g/L, the concentration of sodium thiosulfate is 2-5g/L, the concentration of citric acid is 8-12g/L, the concentration of boric acid is 3-5g/L, the concentration of the emulsifier is 1-2g/L, the concentration of the complexing agent is 1-2g/L, the temperature of the blackening treatment is 55-65 ℃, the blackening treatment time is 2-5 min.
The baking temperature in the baking furnace is 180-200 ℃, and the heat preservation time is 15-20 min.
The anticorrosive powder coating is prepared from the following raw materials in parts by weight: 30-40 parts of phenolic modified epoxy resin, 15-25 parts of ceramic microspheres, 600 parts of saturated resin 210-containing materials, 50-300 parts of special pigment, 15-25 parts of rutile titanium oxide, 0.2-0.6 part of curing accelerator, 0.4-0.6 part of anti-yellow benzoin, 3-5 parts of acetylacetone iridium, 1-2 parts of aminated graphene, 0.5-1.2 parts of polysiloxane defoamer, 0.6-1.2 parts of wetting dispersant and 0.3-0.6 part of thickener.
The preparation method of the aminated graphene comprises the following steps: dissolving graphene in a dispersing agent, performing ultrasonic dispersion for 1-2h to obtain a stable and uniformly dispersed graphene dispersion liquid, adding an amination reagent into the graphene dispersion liquid, reacting at 60-90 ℃ for 12-18h, performing vacuum filtration on the reacted dispersion liquid, washing impurities with the dispersing agent and deionized water, and drying the product in a vacuum oven at 60-80 ℃ to obtain aminated graphene; wherein, by weight, the graphene: dispersing agent: amination reagent ═ 1: (500-1000): (20-40), the dispersant is at least one of N, N-dimethylformamide, N-dimethylacetamide and DMSO, and the amination reagent is at least one of triethylamine, butyl triamine and dicyandiamide.
The saturated resin is low-viscosity solid saturated carboxyl polyester, the glass transition temperature of the saturated resin is 50-65 ℃, and the softening point temperature of the saturated resin is 58-130 ℃.
The ceramic microspheres are hollow microsphere ceramic powder with the particle size of 10-45 mu m.
Embodiment 1 a surface treatment process of a heating radiator, comprising the steps of:
(1) degreasing: degreasing the surface of the radiator by using a degreasing agent to remove oil stains on the surface of the radiator;
(2) acid washing: placing the radiator after oil stain removal into a pickling tank, pickling with pickling solution, and adding a corrosion inhibitor into the pickling solution;
(3) alkali washing: carrying out alkali washing on the surface of the radiator by adopting a sodium hydroxide solution with the mass concentration of 2%;
(4) washing with water: washing the radiator subjected to alkali washing with water and drying in the air;
(5) blackening treatment: carrying out blackening treatment on the radiator washed by the water in the step (4) by adopting a blackening solution;
(6) washing with water: washing the blackened radiator with hot water at 40 ℃ again and drying;
(7) powder spraying: uniformly spraying anticorrosive powder paint on the surface of the radiator washed in the step (6) by using electrostatic powder spraying equipment to form a uniform powder coating;
(8) baking: and (4) sending the powder sprayed radiator into a baking furnace for baking, leveling and curing.
The blackening solution comprises copper sulfate, selenium dioxide, nickel sulfate, zinc sulfate, phosphoric acid, sodium thiosulfate, citric acid, boric acid, an emulsifier and a complexing agent, wherein the concentration of copper sulfate in the blackening solution is 3g/L, the concentration of selenium dioxide is 2g/L, the concentration of nickel sulfate is 1g/L, the concentration of zinc sulfate is 3g/L, the concentration of zinc nitrate is 3g/L, the concentration of phosphoric acid is 10g/L, the concentration of sodium thiosulfate is 2g/L, the concentration of citric acid is 8g/L, the concentration of boric acid is 3g/L, the concentration of the emulsifier is 1g/L and the concentration of the complexing agent is 1g/L, the temperature of the blackening treatment is 55 ℃, and the time of the blackening treatment is 2 min.
The baking temperature in the baking furnace is 180 ℃, and the heat preservation time is 15 min.
The anticorrosive powder coating is prepared from the following raw materials in parts by weight: 30 parts of phenolic aldehyde modified epoxy resin, 15 parts of ceramic microspheres, 210 parts of saturated resin, 50 parts of special pigment, 15 parts of rutile titanium oxide, 0.2 part of curing accelerator, 0.4 part of anti-yellowing benzoin, 3 parts of acetylacetone iridium, 1 part of aminated graphene, 0.5 part of polysiloxane defoamer, 0.6 part of wetting dispersant and 0.3 part of thickener.
The preparation method of the aminated graphene comprises the following steps: dissolving graphene in a dispersing agent, performing ultrasonic dispersion for 1h to obtain a stable and uniformly dispersed graphene dispersion liquid, adding an amination reagent into the graphene dispersion liquid, reacting for 12h at 60 ℃, performing vacuum filtration on the reacted dispersion liquid, washing and cleaning impurities with the dispersing agent and deionized water, and drying the product in a vacuum oven at 60 ℃ to obtain aminated graphene; wherein, by weight, the graphene: dispersing agent: amination reagent ═ 1: 500: 20, the dispersant is at least one of N, N-dimethylformamide, N-dimethylacetamide and DMSO, and the amination reagent is at least one of triethylamine, butyl triamine and dicyandiamide.
The saturated resin is low-viscosity solid saturated carboxyl polyester, the glass transition temperature of the saturated resin is 50 ℃, and the softening point temperature of the saturated resin is 58 ℃.
The ceramic microspheres are hollow microsphere ceramic powder with the particle size of 10 mu m.
Embodiment 2 a surface treatment process of a heating radiator, including the steps of:
(1) degreasing: degreasing the surface of the radiator by using a degreasing agent to remove oil stains on the surface of the radiator;
(2) acid washing: placing the radiator after oil stain removal into a pickling tank, pickling with pickling solution, and adding a corrosion inhibitor into the pickling solution;
(3) alkali washing: carrying out alkali washing on the surface of the radiator by adopting a sodium hydroxide solution with the mass concentration of 5%;
(4) washing with water: washing the radiator subjected to alkali washing with water and drying in the air;
(5) blackening treatment: carrying out blackening treatment on the radiator washed by the water in the step (4) by adopting a blackening solution;
(6) washing with water: washing the blackened radiator with hot water at 50 ℃ again and drying;
(7) powder spraying: uniformly spraying anticorrosive powder paint on the surface of the radiator washed in the step (6) by using electrostatic powder spraying equipment to form a uniform powder coating;
(8) baking: and (4) sending the powder sprayed radiator into a baking furnace for baking, leveling and curing.
The blackening solution comprises copper sulfate, selenium dioxide, nickel sulfate, zinc sulfate, phosphoric acid, sodium thiosulfate, citric acid, boric acid, an emulsifier and a complexing agent, wherein the concentration of copper sulfate in the blackening solution is 6g/L, the concentration of selenium dioxide is 4g/L, the concentration of nickel sulfate is 3g/L, the concentration of zinc sulfate is 5g/L, the concentration of zinc nitrate is 5g/L, the concentration of phosphoric acid is 15g/L, the concentration of sodium thiosulfate is 5g/L, the concentration of citric acid is 12g/L, the concentration of boric acid is 5g/L, the concentration of the emulsifier is 2g/L, the concentration of the complexing agent is 2g/L, the temperature of the blackening treatment is 65 ℃, and the time of the blackening treatment is 5 min.
The baking temperature in the baking furnace is 200 ℃, and the heat preservation time is 20 min.
The anticorrosive powder coating is prepared from the following raw materials in parts by weight: 40 parts of phenolic aldehyde modified epoxy resin, 25 parts of ceramic microspheres, 600 parts of saturated resin, 300 parts of special pigment, 25 parts of rutile titanium oxide, 0.6 part of curing accelerator, 0.6 part of anti-yellowing benzoin, 5 parts of acetylacetone iridium, 2 parts of aminated graphene, 1.2 parts of polysiloxane defoamer, 1.2 parts of wetting dispersant and 0.6 part of thickener.
The preparation method of the aminated graphene comprises the following steps: dissolving graphene in a dispersing agent, performing ultrasonic dispersion for 2 hours to obtain stable and uniformly dispersed graphene dispersion liquid, adding an amination reagent into the graphene dispersion liquid, reacting for 18 hours at 90 ℃, performing vacuum filtration on the reacted dispersion liquid, washing and cleaning impurities with the dispersing agent and deionized water, and drying the product in a vacuum oven at 80 ℃ to obtain aminated graphene; wherein, by weight, the graphene: dispersing agent: amination reagent ═ 1: 1000: 40, the dispersant is at least one of N, N-dimethylformamide, N-dimethylacetamide and DMSO, and the amination reagent is at least one of triethylamine, butyl triamine and dicyandiamide.
The saturated resin is low-viscosity solid saturated carboxyl polyester, the glass transition temperature of the saturated resin is 65 ℃, and the softening point temperature of the saturated resin is 130 ℃.
The ceramic microspheres are hollow microsphere ceramic powder with the particle size of 45 mu m.
The present invention has been described in detail with reference to the above embodiments, and it is apparent that the specific implementation of the present invention is not limited by the above embodiments, and it is within the scope of the present invention to employ various modifications of the method concept and technical solution of the present invention, or to apply the same to other applications without modification.
Claims (7)
1. A surface treatment process for a heating radiator is characterized by comprising the following steps:
(1) degreasing: degreasing the surface of the radiator by using a degreasing agent to remove oil stains on the surface of the radiator;
(2) acid washing: placing the radiator after oil stain removal into a pickling tank, pickling with pickling solution, and adding a corrosion inhibitor into the pickling solution;
(3) alkali washing: carrying out alkali washing on the surface of the radiator by adopting a sodium hydroxide solution with the mass concentration of 2-5%;
(4) washing with water: washing the radiator subjected to alkali washing with water and drying in the air;
(5) blackening treatment: carrying out blackening treatment on the radiator washed by the water in the step (4) by adopting a blackening solution;
(6) washing with water: washing the blackened radiator with hot water at 40-50 deg.C again and drying;
(7) powder spraying: uniformly spraying anticorrosive powder paint on the surface of the radiator washed in the step (6) by using electrostatic powder spraying equipment to form a uniform powder coating;
(8) baking: and (4) sending the powder sprayed radiator into a baking furnace for baking, leveling and curing.
2. The surface treatment process of a heating radiator as claimed in claim 1, wherein the blackening solution comprises copper sulfate, selenium dioxide, nickel sulfate, zinc sulfate, phosphoric acid, sodium thiosulfate, citric acid, boric acid, an emulsifier and a complexing agent, and the concentration of copper sulfate in the blackening solution is 3-6g/L, the concentration of selenium dioxide is 2-4g/L, the concentration of nickel sulfate is 1-3g/L, the concentration of zinc sulfate is 3-5g/L, the concentration of zinc nitrate is 3-5g/L, the concentration of phosphoric acid is 10-15g/L, the concentration of sodium thiosulfate is 2-5g/L, the concentration of citric acid is 8-12g/L, the concentration of boric acid is 3-5g/L, the concentration of the emulsifier is 1-2g/L, the concentration of the sodium thiosulfate is 2-5g/L, the concentration of the citric acid is 8-12g/L, the concentration of the boric acid is, The concentration of the complexing agent is 1-2g/L, the blackening treatment temperature is 55-65 ℃, and the blackening treatment time is 2-5 min.
3. The surface treatment process for a heating radiator as claimed in claim 1, wherein the baking temperature in the baking furnace is 180-.
4. The surface treatment process of the heating radiator as claimed in claim 1, wherein the anticorrosive powder coating is composed of the following raw materials in parts by weight: 30-40 parts of phenolic modified epoxy resin, 15-25 parts of ceramic microspheres, 600 parts of saturated resin 210-containing materials, 50-300 parts of special pigment, 15-25 parts of rutile titanium oxide, 0.2-0.6 part of curing accelerator, 0.4-0.6 part of anti-yellow benzoin, 3-5 parts of acetylacetone iridium, 1-2 parts of aminated graphene, 0.5-1.2 parts of polysiloxane defoamer, 0.6-1.2 parts of wetting dispersant and 0.3-0.6 part of thickener.
5. The surface treatment process for the heating radiator according to claim 4, wherein the preparation method of the aminated graphene comprises the following steps: dissolving graphene in a dispersing agent, performing ultrasonic dispersion for 1-2h to obtain a stable and uniformly dispersed graphene dispersion liquid, adding an amination reagent into the graphene dispersion liquid, reacting at 60-90 ℃ for 12-18h, performing vacuum filtration on the reacted dispersion liquid, washing impurities with the dispersing agent and deionized water, and drying the product in a vacuum oven at 60-80 ℃ to obtain aminated graphene; wherein, by weight, the graphene: dispersing agent: amination reagent ═ 1: (500-1000): (20-40), the dispersant is at least one of N, N-dimethylformamide, N-dimethylacetamide and DMSO, and the amination reagent is at least one of triethylamine, butyl triamine and dicyandiamide.
6. The surface treatment process for a heating radiator as claimed in claim 4, wherein the saturated resin is a low viscosity solid saturated carboxyl polyester having a glass transition temperature of 50-65 ℃ and a softening point temperature of 58-130 ℃.
7. The surface treatment process of a heating radiator according to claim 4, wherein the ceramic beads are hollow bead ceramic powder with a particle size of 10-45 μm.
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