CN115138544A - Processing method of pot and pot - Google Patents
Processing method of pot and pot Download PDFInfo
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- CN115138544A CN115138544A CN202111049144.2A CN202111049144A CN115138544A CN 115138544 A CN115138544 A CN 115138544A CN 202111049144 A CN202111049144 A CN 202111049144A CN 115138544 A CN115138544 A CN 115138544A
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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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/586—No clear coat specified each layer being cured, at least partially, separately
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
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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
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
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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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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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
- B05D2518/00—Other type of polymers
- B05D2518/10—Silicon-containing polymers
- B05D2518/12—Ceramic precursors (polysiloxanes, polysilazanes)
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a processing method of a pot and the pot. The processing method of the pot comprises the following steps. Step (i): spraying amorphous alloy powder on the surface of the cookware through thermal spraying so as to form an amorphous alloy coating; step (ii): coating the surface of the amorphous alloy coating with polysilazane, thereby forming a filling layer on the surface of the amorphous alloy coating; and step (iii): and mixing polydimethylsiloxane and silica sol, and coating the surface of the filling layer to form a covering layer. According to the invention, the cookware has excellent wear resistance and corrosion resistance.
Description
Technical Field
The invention relates to the field of cookers, in particular to a processing method of a cooker and the cooker.
Background
The pot is one of the essential cookers in daily life. In the use process of the cookware, the surface of the cookware inevitably contacts acidic and alkaline substances for a long time to cause corrosion. In addition, the surface of the pot is easy to collide with firm objects such as a turner and the like to cause abrasion. Corrosion and wear are important factors affecting the service life of the cookware.
The surface protection technology applied to the cookware at present mainly comprises a coating-free rust prevention technology, a high polymer layer rust prevention technology and the like. Among them, the non-coating rust-proof technology is mainly represented by surface nitriding, anodic oxidation and chemical passivation technologies, and has the advantages of making the pot healthy and beautiful, and the surface hard and easy to stir-fry, but has the defect of poor surface corrosion resistance of the pot. The representative products are fine iron true stainless steel, cast iron true stainless steel and the like. The polymer layer antirust technology is mainly represented by using a polymer sealing agent, and has the advantages of low cost and good initial corrosion resistance, but has the defects that the polymer is soft, a polymer layer can be damaged by a turner when a consumer actually uses the polymer layer antirust technology, so that the corrosion resistance is sharply reduced, and the consumer has unhealthy impression on polymer cookware products. Which represents products such as low-end cast iron spray pots and the like.
Therefore, a surface protection technology capable of providing cookware with excellent corrosion resistance and wear resistance is needed.
Disclosure of Invention
In order to solve one or more of the above problems in the prior art, the present invention provides a processing method of a pot and a pot.
The processing method of the pot comprises the following steps. Step (i): spraying amorphous alloy powder on the surface of the cookware through thermal spraying so as to form an amorphous alloy coating; step (ii): coating the surface of the amorphous alloy coating with polysilazane to form a filling layer on the surface of the amorphous alloy coating; and step (iii): and mixing polydimethylsiloxane and silica sol, and coating the surface of the filling layer to form a covering layer. Therefore, the sealing layer comprising the filling layer and the covering layer is arranged on the surface of the amorphous alloy coating formed on the surface of the cookware, so that corrosion of corrosive media is prevented, and the cookware has excellent wear resistance and corrosion resistance.
According to an exemplary embodiment of the present invention, in the above step (i), the above amorphous alloy coating layer may be formed by using a plurality of spraying, and the thickness of each spraying may be 45 to 55 μm. Therefore, the amorphous alloy coating can be prevented from being overheated during thermal spraying to influence the content of the amorphous phase.
According to an exemplary embodiment of the present invention, the thickness of the amorphous alloy coating layer formed in the above step (i) may be 200 to 500 μm. Therefore, the thickness of the amorphous alloy coating is limited in the range, the amorphous alloy coating can be prevented from being loose and porous due to the fact that the amorphous alloy coating is too thin (if only 2-3 amorphous alloy powder deposition layers have no tamping effect of subsequent spraying particles, the stress deformation of the deposition particles is small, the density of the amorphous alloy coating is poor), and the aftertreatment allowance is too small. And the heat concentration in the amorphous alloy coating caused by the over-thick amorphous alloy coating during spraying can be prevented, the crystallization transformation of the internal part of the structure is generated, the amorphous phase ratio is reduced, and the corrosion resistance of the amorphous alloy coating is reduced.
According to an exemplary embodiment of the present invention, the amorphous phase ratio in the amorphous alloy coating layer formed in the above step (i) may be 80 mass% or more. Thus, it is possible to prevent the deterioration of corrosion resistance and non-tackiness due to the excessively low amorphous phase content.
According to an exemplary embodiment of the present invention, in the step (iii), a mass ratio of the polydimethylsiloxane to the silica sol may be 1:1 to 1:3. In this way, the performance of the formed cover layer can be improved.
According to an exemplary embodiment of the present invention, after the step (ii) and before the step (iii), a step of curing the filling layer at 200 to 280 ℃ for 8 to 15 minutes may be further included. In this way, the filling layer can be sufficiently cured.
According to an exemplary embodiment of the present invention, after the step (iii), a step of curing the cover layer at 300 to 360 ℃ for 4 to 6 minutes may be further included. In this way, the cover layer can be sufficiently cured.
According to an exemplary embodiment of the present invention, the thickness of the above cover layer after curing may be 5 to 15 μm. The reason why the thickness of the covering layer is set in this range is that if the covering layer is too thin, the sealing effect is not significant, and if the covering layer is too thick, the covering layer is easily broken during use due to low strength of the sealing material, resulting in poor appearance.
In addition, the pot provided by the invention is processed by the processing method of the pot. By performing the above treatment on the pot, a pot having sufficient wear resistance and excellent corrosion resistance can be provided.
According to an exemplary embodiment of the present invention, the pot may be an iron pot or a magnesium alloy pot.
Detailed Description
The inventive concept will now be described more fully hereinafter.
Particularly, in the application research of the anticorrosion technology, the amorphous alloy coating has very wide application prospect due to the amorphous structure. The amorphous alloy is also called as liquid metal, and has no structural defects such as grain boundaries, twin crystals, lattice defects, dislocation, stacking faults and the like a crystal alloy, and has no heterogeneous phase, precipitate, segregation and other component fluctuation, and is a disordered structure, so the amorphous alloy has high uniformity chemically, has no plastic deformation modes such as grain boundary slippage and the like when being subjected to external force, and has higher strength. In addition, since the amorphous alloy has no crystal grains and grain boundaries, the amorphous alloy is more resistant to corrosion than crystalline metals, localized corrosion generally does not occur, and pitting corrosion is suppressed. Therefore, it is considered that the wear resistance and the corrosion resistance of the pot are improved by providing the amorphous alloy coating on the surface of the pot.
Generally, the higher the amorphous content in the amorphous alloy coating and the lower the porosity, the better the corrosion resistance of the amorphous alloy coating. However, the conventional amorphous alloy coating is often dense at the bottom layer in the preparation process, and the surface layer has more pores because of no subsequent tamping action. If the porosity is desired to be reduced, the amorphous alloy powder generally needs to absorb more heat to be sufficiently heated and melted, so as to achieve the purpose of reducing the porosity. But when the amorphous alloy powder absorbs more heat, it is easy to undergo crystallization transformation, reducing the amorphous phase content. The invention reduces or closes the pores on the surface of the coating by plugging the pores of the amorphous alloy coating with a specific sealing agent so as to isolate a corrosive medium. Thus, the present invention has been completed.
Specifically, the processing method of the pot of the present invention comprises: step (i): spraying amorphous alloy powder on the surface of the cookware through thermal spraying so as to form an amorphous alloy coating; step (ii): coating the surface of the amorphous alloy coating with polysilazane to form a filling layer on the surface of the amorphous alloy coating; and step (iii): and mixing polydimethylsiloxane and silica sol, and coating the surface of the filling layer to form the covering layer. In this way, the sealing layer comprising the filling layer and the covering layer is arranged on the surface of the amorphous alloy coating formed on the surface of the cookware, so that corrosion of corrosive media is prevented, and the cookware has excellent wear resistance and corrosion resistance.
Wherein, in step (i), the thermal spraying may be any one of low-pressure plasma spraying, supersonic flame spraying, oxyacetylene flame spraying, arc spraying, explosion spraying, and the like. Among them, low-pressure plasma spraying is preferably employed.
Taking the example of thermal spraying by adopting a low-pressure plasma process, the step (i) specifically comprises the following steps: the process (a) is to pretreat the surface of the base of the pot. Firstly, cleaning oil stain on the surface of a pot blank by using an alkaline solvent, then cleaning the pot blank by using clear water, drying the pot blank, and then performing sand blasting and coarsening on the pot blank, so that the roughness of the surface of a matrix is increased, and the binding force of a subsequent spraying layer is improved; the process (b) preheats the pot body. Preheating by a heating furnace at 200-300 ℃, wherein the temperature difference between the matrix and the high-temperature powder can be reduced by preheating, the thermal stress between the matrix and the coating is reduced, and the quality and the bonding strength of the coating are improved; step (c), plasma arc striking is carried out, and an amorphous alloy coating is formed by spraying; and (d) naturally cooling the formed amorphous alloy coating, sanding the surface by using 120-mesh sand paper, and enabling the surface roughness Ra to reach 1-2 mu m after sanding. Wherein the technological parameters of the thermal spraying are preferably as follows: pumping the vacuum degree of the spraying chamber to 3Pa, and filling argon to 6 multiplied by 10 3 Pa, transfer arc power of 30Kw, arc current of600 to 800A, the spraying distance is 120mm, the spraying angle is 60 to 80 degrees, the preheating temperature of the pot body is 200 to 300 ℃, the powder feeding speed is 10 to 40g/min, the hydrogen pressure is 0.3 to 0.7MPa, and the flow is 5 to 10L/min.
Among them, in the step (i), it is preferable that the amorphous alloy coating layer is formed by spraying a plurality of times, and the thickness of each spraying is 45 to 55 μm. Therefore, the amorphous alloy coating can be prevented from being overheated during thermal spraying to influence the content of the amorphous phase.
The thickness of the amorphous alloy coating layer formed in the step (i) is preferably 200 to 500. Mu.m, more preferably 300 to 400. Mu.m, and most preferably about 350. Mu.m. Therefore, the thickness of the amorphous alloy coating is limited in the range, the amorphous alloy coating can be prevented from being loose and porous due to the fact that the amorphous alloy coating is too thin (if only 2-3 amorphous alloy powder deposition layers have no tamping effect of subsequent spraying particles, the stress deformation of the deposition particles is small, the density of the amorphous alloy coating is poor), and the aftertreatment allowance is too small. And the heat concentration in the amorphous alloy coating caused by the over-thick amorphous alloy coating during spraying can be prevented, the crystallization transformation of the internal part of the structure is generated, the amorphous phase ratio is reduced, and the corrosion resistance of the amorphous alloy coating is reduced.
The amorphous phase content in the amorphous alloy coating layer formed in step (i) is preferably 80 mass% or more. Thus, it is possible to prevent the deterioration of corrosion resistance and non-tackiness due to the excessively low amorphous phase content.
According to an exemplary embodiment of the present invention, in the above step (iii), the mass ratio of polydimethylsiloxane to silica sol may be 1:1 to 1:3, and it is particularly preferable that the mass ratio of polydimethylsiloxane to silica sol may be 1:2. In this way, the performance of the formed cover layer can be improved.
In the present invention, the filling layer is a sealing agent filled in the pores of the amorphous alloy coating layer, and the covering layer is a sealing agent covering the surface of the amorphous alloy coating layer. Therefore, the thickness of the filling layer is not particularly limited, and it may be used to fill surface pores as long as the surface is connected to the pores.
Further, it is preferable to include a step of curing the filling layer at 200 to 280 ℃ for 8 to 15 minutes after the step (ii) and before the step (iii). In this way, the filling layer can be sufficiently cured.
It is preferable that the method further comprises, after the step (iii), a step of curing the cover layer at 300 to 360 ℃ for 4 to 6 minutes. In this way, the cover layer can be sufficiently cured.
According to an exemplary embodiment of the present invention, the thickness of the above-described cover layer after curing may be 5 to 15 μm. The reason why the thickness of the covering layer is set in this range is that if the covering layer is too thin, the sealing effect is not significant, and if the covering layer is too thick, the covering layer is easily broken during use due to the low strength of the sealing material, resulting in poor appearance.
Namely, the invention forms a sealing layer comprising a covering layer and a filling layer on the surface of the amorphous alloy coating by post-treatment to block corrosion medium erosion. The specific treatment mode adopts a sealing agent to plug the holes, a sealing layer is formed on the surface layer of the amorphous alloy coating, and the sealing layer comprises a filling layer formed by polysilazane used as the sealing agent and a covering layer formed by polydimethylsiloxane and silica sol. Therefore, the amorphous surface layer can be covered and the pores on the surface layer of the amorphous alloy coating can be filled, and the effect of isolating a corrosive medium is achieved. The polysilazane used for the filling layer has super-strong permeability, can permeate into pores to form the filling layer, but has super-hydrophilicity, and once a film is formed, the pores are easy to absorb moisture to cause matrix corrosion. And the polydimethylsiloxane and the silica sol are mixed and then coated on the surface of the filling layer to form a covering layer, a compact protective film can be formed on the surface after curing, and the polydimethylsiloxane and the silica sol are sintered to form a nano-silica microstructure film which has better wear resistance and hydrophobicity and can isolate moisture in the air.
The specific operation is as follows:
firstly, cleaning the cookware with the amorphous alloy coating by using an ultrasonic cleaning machine, removing dust on the surface and in pores of the cookware, and fully drying the cookware after cleaning;
step (b) is to apply polysilazane as a sealing agent in the filling layer. Coating the sealant on the surface of the amorphous alloy coating by adopting a method of air spraying, wiping with a rag or wiping after immersing, and standing for 1-3 hours to ensure that the sealant is fully permeated;
and (c) curing the pot coated with the filling layer in a drying furnace at the curing temperature of 200-280 ℃ for 8-15 minutes.
Sanding the pot with the solidified filling layer to remove redundant silazane covered on the surface, so as to facilitate the adhesion of a subsequent covering layer;
and (e) coating the mixture of polydimethylsiloxane and silica sol on the sanded surface to form a covering layer, wherein the coating mode comprises air spraying, wiping with a rag or wiping after soaking.
And (f) curing the sample coated with the covering layer in a drying furnace at the curing temperature of 300-360 ℃ for 4-6 minutes.
In the present invention, the amorphous alloy powder is preferably any one or more selected from the group consisting of an iron-based amorphous alloy powder, a zirconium-based amorphous alloy powder, a copper-based amorphous alloy powder, an aluminum-based amorphous alloy powder, a magnesium-based amorphous alloy powder, a titanium-based amorphous alloy powder, and an isoatomic ratio high-entropy amorphous alloy powder. In addition, the main element components of the amorphous alloy powder may include Fe, zr, C μ, al, mg, ti, sn, ni, pb, zn, nd, ga, mo, hf, cr, ca, Y, si, P, B, C, and the like. For example, the composition of the amorphous alloy powder may be Zr in atomic percent 60 -Cr 20 -Al 13 -Ni 5 -Hf 2 、Zr 65 -(Ti)-Ni 10 -Al 10 -Cu 15 (wherein "(Ti)" means a trace amount of Fe contained or not contained), and Fe 80 -Cr 5 -Mo 6 -B 4 -Si 5 、Fe 50 -Zr 20 -Cr 9 -B 6 -Cμ 10 -Y 5 And the like. In the present specification, the terms "isoatomic ratio high entropy alloy" means that various alloy compositions containing four or more alloy elements are known in the artThe atomic percentages of the elements are equal or substantially equal. Specifically, the isoatomic ratio high-entropy amorphous alloy may be Fe 20 -Sn 20 -Pb 20 -P 20 -C 20 And the like. By selecting proper amorphous alloy powder, the performance of the cookware can be further improved.
In addition, in the present invention, the method for preparing the amorphous alloy powder may employ a method generally used in the art. The amorphous alloy powder is preferably prepared by an atomization powder preparation method. Taking iron-based amorphous alloy powder as an example, an iron-based amorphous alloy molten liquid is sprayed onto a copper quenching disc rotating at a high speed (the surface linear velocity of the iron-based amorphous alloy molten liquid can reach 100 m/s), fine particles solidified after the alloy liquid is atomized are scattered to the periphery under the action of centrifugal force, and inert gas is sprayed through gas nozzles arranged on the periphery of the disc to accelerate cooling. The cooling rate of the method can reach 106K/s, so that the alloy structure is not ready for crystallization and is solidified in a supercooled state to form amorphous alloy powder.
In addition, the pot of the present invention may be a pot generally used, for example, a pot made of iron or a pot made of magnesium alloy.
The technical solution of the present invention is described in detail below with reference to examples, but the scope of the present invention is not limited to the examples.
[ example 1]
(1) Preparation of amorphous alloy powder
Five metal materials of Fe, cr, mo, B and Si are mixed according to the alloy chemical formula Fe 80 -Cr 5 -Mo 6 -B 4 -Si 5 The method comprises the following steps of proportioning according to atomic percentage content, smelting the alloy raw materials in a smelting furnace to form iron-based molten alloy liquid, spraying the iron-based molten alloy liquid onto a copper quenching disc rotating at a high speed, atomizing the iron-based molten alloy liquid, solidifying the atomized iron-based molten alloy liquid to form fine particles, dispersing the fine particles to the periphery under the action of centrifugal force, and spraying inert gas through gas nozzles arranged on the periphery of the quenching disc to accelerate the cooling of the fine particles to form iron-based amorphous alloy powder.
(2) Preparation of amorphous alloy coating
A step (a): to carry out pretreatment on the surface of the cookware
Cleaning oil stain on the surface of the pot with an alkaline solvent, and then cleaning with clean water and drying. Then, the surface is subjected to sand blasting roughening.
A step (b): preheating pot body
The pot was preheated to 230 ℃ with a furnace.
A step (c): forming amorphous alloy coating
Pumping the vacuum degree of the spraying chamber to 3Pa, and then filling argon to 6 multiplied by 10 3 Pa. And (3) utilizing plasma arc striking to thermally spray the iron-based amorphous alloy powder on the preheated surface of the pot body for four times, wherein the thickness of each spraying is 50 mu m, and an amorphous alloy coating with the thickness of 200 mu m is formed. Wherein the plasma arc power is set to 30Kw, the electric current of the electric arc is set to 700A, the spraying distance is set to 120mm, the spraying angle is set to 70 degrees, the powder feeding speed is set to 25g/min, the hydrogen pressure is set to 0.5MPa, and the flow rate is set to 7L/min.
Step (d): sanding
And naturally cooling the formed amorphous alloy coating to room temperature, and sanding the surface of the amorphous alloy coating by using 120-mesh sand paper. And confirming that the surface roughness Ra of the amorphous alloy coating reaches 1-2 mu m by a roughness meter, and finishing the sanding treatment.
(3) Forming a filling layer
Cleaning the cookware with the amorphous alloy coating by using an ultrasonic cleaning machine, removing dust on the surface and in pores of the cookware, and fully drying the cookware after cleaning;
and (b) coating the sealing agent polysilazane on the surface of the amorphous alloy coating by adopting a method of wiping with a rag. Standing for 2 hours to fully permeate;
and (c) curing the pot coated with the filling layer in a drying furnace at the curing temperature of 250 ℃ for 10 minutes.
And (d) sanding the pot with the cured filling layer to remove redundant silazane covered on the surface, so as to facilitate the adhesion of the subsequent covering layer.
(4) Forming a capping layer
And (a) applying a mixture of polydimethylsiloxane and silica sol in a mass ratio of 1:2 to the sanded surface of the filler layer by wiping with a rag to form a coating layer.
And (b) placing the pot coated with the covering layer in a drying furnace for curing, wherein the curing temperature is 340 ℃, and the curing time is 5 minutes. The thickness of the cured coating was 8 μm.
Therefore, the cookware with the amorphous alloy coating with the surface being subjected to sealing treatment is finally obtained.
[ example 2]
A pot having an amorphous alloy coating whose surface was closed was obtained in the same manner as in example 1, except that the thickness of the formed cured coating layer was 2 μm.
[ example 3]
A pot having an amorphous alloy coating whose surface was sealed was obtained in the same manner as in example 1, except that the thickness of the formed solidified coating layer was 25 μm.
Comparative example 1
A pot having an amorphous alloy coating layer provided on the surface thereof was obtained in the same manner as in example 1, except that the steps of forming the filling layer in step (3) and forming the covering layer in step (4) were not performed.
Performance index testing
The performance of the pots obtained in examples 1 to 3 and comparative example 1 was measured and shown in table 1. The performance test method comprises the following steps:
(1) Abrasion resistance detection method
The wear resistance of the coating is detected by a coating wear resistance tester, and the more the wear resistance times are, the better the wear resistance is.
(2) Corrosion resistance detection method
The Sopor internal control standard is adopted: 5% salt spray does not rust for more than 24 hours; boiling 5% saline water, keeping slightly boiling, and not rusting for more than 3 hours; after the tea is soaked in 2% acetic acid, the tea does not rust for more than 3 hours.
Table 1: performance index test results
From table 1 above, it can be seen that the corrosion resistance of the pot with the amorphous alloy coating subjected to the sealing treatment is significantly better than that of the pot with the amorphous alloy coating not subjected to the sealing treatment, as compared with comparative example 1 in examples 1 to 3. Comparing example 1 with examples 2 and 3, the pot having the amorphous alloy coating layer with the thickness of the cured coating layer in the range of 5 to 15 μm was found to have the best overall performance.
In summary, the invention has the following beneficial effects:
(1) The amorphous alloy coating is formed on the surface of the cookware, and the surface of the amorphous alloy coating is subjected to sealing treatment, so that the treated amorphous alloy coating has the following characteristics:
(1) high hardness: the normal stir-frying of the iron shovel of a family and even the knocking of the iron shovel can be met without deformation or abrasion;
(2) the corrosion resistance is good: can completely meet the corrosion resistance requirement under the normal cooking environment of a family.
(2) On the basis of the preparation of the conventional liquid metal coating, the invention closes the pores on the surface of the liquid metal coating by a post-treatment means, prevents corrosive media from entering the coating and corroding a pot body, thereby having excellent corrosion resistance.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; it is intended that the following claims be interpreted as including all such alterations, modifications, and equivalents as fall within the true spirit and scope of the invention.
Claims (10)
1. A processing method of a pot is characterized by comprising the following steps:
step (i): spraying amorphous alloy powder on the surface of the cookware through thermal spraying so as to form an amorphous alloy coating;
step (ii): coating the surface of the amorphous alloy coating with polysilazane, thereby forming a filling layer on the surface of the amorphous alloy coating; and
step (iii): and mixing polydimethylsiloxane and silica sol, and coating the surface of the filling layer to form a covering layer.
2. The method of treating a pot according to claim 1, wherein in the step (i), the amorphous alloy coating is formed by using a plurality of spraying, each spraying having a thickness of 45 to 55 μm.
3. The method of processing a pot according to claim 2, wherein the thickness of the amorphous alloy coating layer formed in the step (i) is 200-500 μm.
4. The method of processing a pot according to claim 3, wherein the amorphous alloy coating layer formed in the step (i) contains an amorphous phase in an amount of 80 mass% or more.
5. The method for treating a pot as claimed in claim 1, wherein in the step (iii), the mass ratio of the polydimethylsiloxane to the silica sol is 1:1-1:3.
6. The method of treating a pot as claimed in claim 4 further comprising the step of curing the filling layer at 200-280 ℃ for 8-15 minutes after the step (ii) and before the step (iii).
7. The method for treating a pot as claimed in claim 1, further comprising the step of curing the cover layer at 300-360 ℃ for 4-6 minutes after the step (iii).
8. The method of processing a pot according to claim 7, wherein the thickness of the cover layer after curing is 5 to 15 μm.
9. A cookware, characterized in that the cookware is processed by the processing method of any one of claims 1 to 8.
10. The cookware according to claim 9, wherein said cookware is iron cookware or magnesium alloy cookware.
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| CN202111049144.2A CN115138544B (en) | 2021-09-08 | 2021-09-08 | Pot treatment method and pot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117586696A (en) * | 2024-01-18 | 2024-02-23 | 宁波卓翔科技有限公司 | Ceramic organic-inorganic composite high-temperature anticorrosive paint |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101448818B1 (en) * | 2014-02-05 | 2014-10-08 | 한국남부발전(주) | Coating layer and method for preparing the same |
| CN109181530A (en) * | 2018-08-31 | 2019-01-11 | 吉林大学 | Bis- compound super-hydrophobic coats of scale silica of dimethyl silicone polymer-and forming method thereof |
| CN112063958A (en) * | 2020-07-28 | 2020-12-11 | 山东金泰非晶科技有限公司 | Reciprocating pump plunger coated with amorphous alloy coating and processing technology thereof |
| CN113088859A (en) * | 2021-03-30 | 2021-07-09 | 潍柴动力股份有限公司 | Composite coating, piston, engine and vehicle |
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2021
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| KR101448818B1 (en) * | 2014-02-05 | 2014-10-08 | 한국남부발전(주) | Coating layer and method for preparing the same |
| CN109181530A (en) * | 2018-08-31 | 2019-01-11 | 吉林大学 | Bis- compound super-hydrophobic coats of scale silica of dimethyl silicone polymer-and forming method thereof |
| CN112063958A (en) * | 2020-07-28 | 2020-12-11 | 山东金泰非晶科技有限公司 | Reciprocating pump plunger coated with amorphous alloy coating and processing technology thereof |
| CN113088859A (en) * | 2021-03-30 | 2021-07-09 | 潍柴动力股份有限公司 | Composite coating, piston, engine and vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117586696A (en) * | 2024-01-18 | 2024-02-23 | 宁波卓翔科技有限公司 | Ceramic organic-inorganic composite high-temperature anticorrosive paint |
| CN117586696B (en) * | 2024-01-18 | 2024-04-26 | 宁波卓翔科技有限公司 | Ceramic organic-inorganic composite high-temperature anticorrosive paint |
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| CN115138544B (en) | 2023-07-14 |
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