CN112176344A - Process method for enameling inner end cover of enamel inner container of air energy water heater - Google Patents

Process method for enameling inner end cover of enamel inner container of air energy water heater Download PDF

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Publication number
CN112176344A
CN112176344A CN202010898651.2A CN202010898651A CN112176344A CN 112176344 A CN112176344 A CN 112176344A CN 202010898651 A CN202010898651 A CN 202010898651A CN 112176344 A CN112176344 A CN 112176344A
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CN
China
Prior art keywords
end cover
inner end
enamel
spray gun
process method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010898651.2A
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Chinese (zh)
Inventor
黄志平
廖斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Sangao Heat Preservation Water Tank Co ltd
Original Assignee
Foshan Sangao Heat Preservation Water Tank Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Foshan Sangao Heat Preservation Water Tank Co ltd filed Critical Foshan Sangao Heat Preservation Water Tank Co ltd
Priority to CN202010898651.2A priority Critical patent/CN112176344A/en
Publication of CN112176344A publication Critical patent/CN112176344A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • C23D5/005—Coating with enamels or vitreous layers by a method specially adapted for coating special objects
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • 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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • C23D5/04—Coating with enamels or vitreous layers by dry methods
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2204/00—Glasses, glazes or enamels with special properties
    • C03C2204/02—Antibacterial glass, glaze or enamel
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2207/00—Compositions specially applicable for the manufacture of vitreous enamels
    • C03C2207/04—Compositions specially applicable for the manufacture of vitreous enamels for steel

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses an enamel process method for an inner end cover of an enamel liner of an air energy water heater, which comprises a liner substrate, the inner end cover and an enamel coating arranged on the surface of the liner substrate, wherein the enamel coating comprises a bottom layer and a surface antibacterial layer, and fumed silica powder adsorbing antibacterial particles is arranged in the surface antibacterial layer, and the process method specifically comprises the following steps: s1 manufacturing and forming, S2 removing an oxide layer on the surface of the inner end cover wall, S3 spraying an enamel coating at the connecting seam of the inner container substrate and the inner end cover by using an inclined spraying type spray gun, S4 spraying the enamel coating on the inner end cover wall, and S5 baking and sintering the inner container main body, wherein the added antibacterial particles are mainly enriched in the surface antibacterial layer, and the contact part of the inner end cover and the inner container substrate has little change of components, so that the influence on the mechanical property and the corrosion resistance of the enamel is little; the inner end cover and the inner container base body have good bonding force and strong corrosion resistance.

Description

Process method for enameling inner end cover of enamel inner container of air energy water heater
Technical Field
The invention relates to the technical field of enamel, in particular to a process method for enameling an inner end cover of an enamel liner of an air energy water heater.
Background
Electric water heaters used in the market are more and more in variety and style, and different in function. The inner container of the existing electric water heater can be generally divided into three types according to different materials, namely, a metal coating or a lining plastic resin layer is added on the inner wall of a carbon steel substrate; secondly, stainless steel is adopted for welding, and thirdly, an enamel liner is manufactured by coating enamel materials on a carbon steel substrate. The corrosion resistance of the water containers of the first two water heaters is limited due to the purity of chloride ions in water. Therefore, the enamel liner has the advantages of corrosion resistance, long service life and the like, so that the enamel liner is most widely applied at present.
Disclosure of Invention
In order to solve the problems, the invention provides an enamel process method for an inner end cover of an enamel liner of an air energy water heater, which comprises a liner substrate, the inner end cover and an enamel coating arranged on the surface of the liner substrate, wherein the enamel coating comprises a bottom layer and a surface antibacterial layer, and fumed silica powder for adsorbing antibacterial particles is arranged in the surface antibacterial layer;
the surface antibacterial layer is distributed according to the weight percentage and comprises the following components: 1 to 5 percent of nano copper powder, 0.1 to 0.5 percent of nano silver powder, 0.1 to 1 percent of gas-phase silicon dioxide powder, 0.2 to 0.4 percent of silver phosphate particles and 0.1 to 0.5 percent of copper oxide particles;
the method specifically comprises the following steps: s1, manufacturing and molding the inner container base body and the inner end cover through welding to manufacture the inner container main body;
s2, removing the surface oxide layer on the inner end cover wall surface by adopting a sand blasting process;
s3, spraying the enamel coating at the joint of the liner substrate and the inner end cover by using an inclined spray type spray gun,
s4, spraying an enamel coating on the wall surface of the inner end cover by adopting an inclined spray type spray gun, a direct spray type spray gun or a dispersed spray type spray gun,
s5, baking the liner main body at 85-100 ℃ for 15-30 minutes; then, sintering at 800-950 ℃ for 20-25 minutes.
Furthermore, the particle size range of the nanometer copper powder is 25nm-55nm, the particle size range of the nanometer silver powder is 23nm-57nm, the particle size range of the gas phase silicon dioxide powder is 150nm-200nm, the particle size range of the silver phosphate particle is 50nm-450nm, and the particle size range of the copper oxide particle is 50nm-500 nm.
Furthermore, the enamel coating contains a dispersant, and the dispersant accounts for 0.1-1% of the enamel coating in percentage by weight.
Further, in S3, the base body is hung on a powder spraying hanger with the opening of the base body facing downward, a plurality of connecting seams formed at a joint between the inner wall surface of the base body and the inner end cap are divided into a plurality of seam areas along the circumferential direction of the base body, and enamel powder is sprayed on the plurality of seam areas by sequentially using an inclined spray gun.
Further, in the step 102: the moving speed of the inclined spraying type spray gun is 3-4 m/min, the voltage of the spray gun is 30-50 kV, the current of the spray gun is 8-13 muA, the distance between the inclined spraying type spray gun and the surface of the joint area is 100-250 mm, and the spraying thickness is 100-300 muM.
Compared with the prior art, the invention has the beneficial effects that: according to the process method for enameling the inner end cover of the enamel inner container of the air energy water heater, the added antibacterial particles are mainly concentrated on the surface antibacterial layer, and the component change of the contact part of the inner end cover and the inner container substrate is small, so that the influence on the mechanical property and the corrosion resistance of the enamel is small; the inner end cover and the inner container base body have good bonding force and strong corrosion resistance.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
Example 1
An inner end cover enamel process method of an enamel liner of an air energy water heater comprises a liner substrate, an inner end cover and an enamel coating arranged on the surface of the liner substrate, wherein the enamel coating comprises a bottom layer and a surface antibacterial layer, and fumed silica powder for adsorbing antibacterial particles is arranged in the surface antibacterial layer;
the surface antibacterial layer is distributed according to the weight percentage and comprises the following components: 1% of nano copper powder, 0.1% of nano silver powder, 0.1% of gas-phase silicon dioxide powder, 0.2% of silver phosphate particles and 0.1% of copper oxide particles;
the method specifically comprises the following steps: s1, manufacturing and molding the inner container base body and the inner end cover through welding to manufacture the inner container main body;
s2, removing the surface oxide layer on the inner end cover wall surface by adopting a sand blasting process;
s3, spraying the enamel coating at the joint of the liner substrate and the inner end cover by using an inclined spray type spray gun,
s4, spraying an enamel coating on the wall surface of the inner end cover by adopting an inclined spray type spray gun, a direct spray type spray gun or a dispersed spray type spray gun,
s5, baking the liner main body at 85 ℃ for 30 minutes; then, the mixture was sintered at 800 ℃ for 25 minutes.
Example 2
An inner end cover enamel process method of an enamel liner of an air energy water heater comprises a liner substrate, an inner end cover and an enamel coating arranged on the surface of the liner substrate, wherein the enamel coating comprises a bottom layer and a surface antibacterial layer, and fumed silica powder for adsorbing antibacterial particles is arranged in the surface antibacterial layer;
the surface antibacterial layer is distributed according to the weight percentage and comprises the following components: 2% of nano copper powder, 0.2% of nano silver powder, 0.3% of gas-phase silicon dioxide powder, 0.3% of silver phosphate particles and 0.2% of copper oxide particles;
the method specifically comprises the following steps: s1, manufacturing and molding the inner container base body and the inner end cover through welding to manufacture the inner container main body;
s2, removing the surface oxide layer on the inner end cover wall surface by adopting a sand blasting process;
s3, spraying the enamel coating at the joint of the liner substrate and the inner end cover by using an inclined spray type spray gun,
s4, spraying an enamel coating on the wall surface of the inner end cover by adopting an inclined spray type spray gun, a direct spray type spray gun or a dispersed spray type spray gun,
s5, baking the liner main body at 90 ℃ for 25 minutes; then, the mixture was sintered at 850 ℃ for 25 minutes.
Example 3
An inner end cover enamel process method of an enamel liner of an air energy water heater comprises a liner substrate, an inner end cover and an enamel coating arranged on the surface of the liner substrate, wherein the enamel coating comprises a bottom layer and a surface antibacterial layer, and fumed silica powder for adsorbing antibacterial particles is arranged in the surface antibacterial layer;
the surface antibacterial layer is distributed according to the weight percentage and comprises the following components: 3 percent of nano copper powder, 0.4 percent of nano silver powder, 0.6 percent of gas-phase silicon dioxide powder, 0.3 percent of silver phosphate particles and 0.4 percent of copper oxide particles;
the method specifically comprises the following steps: s1, manufacturing and molding the inner container base body and the inner end cover through welding to manufacture the inner container main body;
s2, removing the surface oxide layer on the inner end cover wall surface by adopting a sand blasting process;
s3, spraying the enamel coating at the joint of the liner substrate and the inner end cover by using an inclined spray type spray gun,
s4, spraying an enamel coating on the wall surface of the inner end cover by adopting an inclined spray type spray gun, a direct spray type spray gun or a dispersed spray type spray gun,
s5, baking the inner container main body at 95 ℃ for 20 minutes; then, the mixture was sintered at 850 ℃ for 20 minutes.
Example 4
An inner end cover enamel process method of an enamel liner of an air energy water heater comprises a liner substrate, an inner end cover and an enamel coating arranged on the surface of the liner substrate, wherein the enamel coating comprises a bottom layer and a surface antibacterial layer, and fumed silica powder for adsorbing antibacterial particles is arranged in the surface antibacterial layer;
the surface antibacterial layer is distributed according to the weight percentage and comprises the following components: 1-5% of nano copper powder, 0.5% of nano silver powder, 1% of gas-phase silicon dioxide powder, 0.4% of silver phosphate particles and 0.5% of copper oxide particles;
the method specifically comprises the following steps: s1, manufacturing and molding the inner container base body and the inner end cover through welding to manufacture the inner container main body;
s2, removing the surface oxide layer on the inner end cover wall surface by adopting a sand blasting process;
s3, spraying the enamel coating at the joint of the liner substrate and the inner end cover by using an inclined spray type spray gun,
s4, spraying an enamel coating on the wall surface of the inner end cover by adopting an inclined spray type spray gun, a direct spray type spray gun or a dispersed spray type spray gun,
s5, baking the liner main body at 100 ℃ for 15 minutes; then, the mixture was sintered at 800 ℃ for 20 minutes.
In the preferred embodiment of the invention, the particle size of the nanometer copper powder is in the range of 25nm-55nm, the particle size of the nanometer silver powder is in the range of 23nm-57nm, the particle size of the fumed silica powder is in the range of 150nm-200nm, the particle size of the silver phosphate particles is in the range of 50nm-450nm, and the particle size of the copper oxide particles is in the range of 50nm-500 nm.
In a preferred embodiment of the invention, the enamel coating contains a dispersant, and the dispersant accounts for 0.1-1% of the enamel coating by weight.
In a preferred embodiment of the present invention, in S3, the base body is hung on a powder spraying hanger with an opening of the base body facing downward, a plurality of connecting seams formed at a connection point between an inner wall surface of the base body and an inner end cap are divided into a plurality of seam areas along a circumferential direction of the base body, and enamel powder is sprayed on the plurality of seam areas sequentially by using an inclined spray gun.
In a preferred embodiment of the present invention, in said step 102: the moving speed of the inclined spraying type spray gun is 3-4 m/min, the voltage of the spray gun is 30-50 kV, the current of the spray gun is 8-13 muA, the distance between the inclined spraying type spray gun and the surface of the joint area is 100-250 mm, and the spraying thickness is 100-300 muM.
The main principle of the invention is as follows: according to the process method for enameling the inner end cover of the enamel inner container of the air energy water heater, the added antibacterial particles are mainly concentrated on the surface antibacterial layer, and the component change of the contact part of the inner end cover and the inner container substrate is small, so that the influence on the mechanical property and the corrosion resistance of the enamel is small; the inner end cover and the inner container base body have good bonding force and strong corrosion resistance.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. An inner end cover enamel process method of an enamel liner of an air energy water heater is characterized by comprising the following steps: the inner container comprises an inner container base body, an inner end cover and an enamel coating arranged on the surface of the inner container base body, wherein the enamel coating comprises a bottom layer and a surface antibacterial layer, and fumed silica powder for adsorbing antibacterial particles is arranged in the surface antibacterial layer;
the surface antibacterial layer is distributed according to the weight percentage and comprises the following components: 1 to 5 percent of nano copper powder, 0.1 to 0.5 percent of nano silver powder, 0.1 to 1 percent of gas-phase silicon dioxide powder, 0.2 to 0.4 percent of silver phosphate particles and 0.1 to 0.5 percent of copper oxide particles;
the method specifically comprises the following steps: s1, manufacturing and molding the inner container base body and the inner end cover through welding to manufacture the inner container main body;
s2, removing the surface oxide layer on the inner end cover wall surface by adopting a sand blasting process;
s3, spraying the enamel coating at the joint of the liner substrate and the inner end cover by using an inclined spray type spray gun,
s4, spraying an enamel coating on the wall surface of the inner end cover by adopting an inclined spray type spray gun, a direct spray type spray gun or a dispersed spray type spray gun,
s5, baking the liner main body at 85-100 ℃ for 15-30 minutes; then, sintering at 800-950 ℃ for 20-25 minutes.
2. The process method for enameling the inner end cover of the enamel liner of the air energy water heater according to claim 1, wherein the process method comprises the following steps: the particle size range of the nano copper powder is 25nm-55nm, the particle size range of the nano silver powder is 23nm-57nm, the particle size range of the fumed silica powder is 150nm-200nm, the particle size range of the silver phosphate particles is 50nm-450nm, and the particle size range of the copper oxide particles is 50nm-500 nm.
3. The process method for enameling the inner end cover of the enamel liner of the air energy water heater according to claim 1, wherein the process method comprises the following steps: the enamel coating contains a dispersant, and the dispersant accounts for 0.1-1% of the enamel coating in percentage by weight.
4. The process method for enameling the inner end cover of the enamel liner of the air energy water heater according to claim 1, wherein the process method comprises the following steps: and S3, hanging the base body on a powder spraying hanging tool, enabling an opening of the base body to face downwards, dividing a plurality of connecting seams formed at the connecting position of the inner wall surface of the base body and the inner end cover into a plurality of seam areas along the circumferential direction of the base body, and spraying enamel powder on the seam areas by sequentially adopting an inclined spraying type spray gun.
5. The process method for enameling the inner end cover of the enamel liner of the air energy water heater according to claim 1, wherein the process method comprises the following steps: the moving speed of the inclined spraying type spray gun is 3-4 m/min, the voltage of the spray gun is 30-50 kV, the current of the spray gun is 8-13 muA, the distance between the inclined spraying type spray gun and the surface of the joint area is 100-250 mm, and the spraying thickness is 100-300 muM.
CN202010898651.2A 2020-08-31 2020-08-31 Process method for enameling inner end cover of enamel inner container of air energy water heater Pending CN112176344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010898651.2A CN112176344A (en) 2020-08-31 2020-08-31 Process method for enameling inner end cover of enamel inner container of air energy water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010898651.2A CN112176344A (en) 2020-08-31 2020-08-31 Process method for enameling inner end cover of enamel inner container of air energy water heater

Publications (1)

Publication Number Publication Date
CN112176344A true CN112176344A (en) 2021-01-05

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102944063A (en) * 2012-09-27 2013-02-27 广东万家乐燃气具有限公司 Antibacterial enamel tank for water heater and production method thereof
CN105525291A (en) * 2016-01-05 2016-04-27 广东美的厨房电器制造有限公司 Enamel inner container as well as enamel spraying method and equipment of enamel inner container

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102944063A (en) * 2012-09-27 2013-02-27 广东万家乐燃气具有限公司 Antibacterial enamel tank for water heater and production method thereof
CN105525291A (en) * 2016-01-05 2016-04-27 广东美的厨房电器制造有限公司 Enamel inner container as well as enamel spraying method and equipment of enamel inner container

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Application publication date: 20210105