CN109081584A - A kind of heat and corrosion resistant enamel coating - Google Patents
A kind of heat and corrosion resistant enamel coating Download PDFInfo
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- CN109081584A CN109081584A CN201811104133.8A CN201811104133A CN109081584A CN 109081584 A CN109081584 A CN 109081584A CN 201811104133 A CN201811104133 A CN 201811104133A CN 109081584 A CN109081584 A CN 109081584A
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- 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
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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
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
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Abstract
The invention discloses a kind of heat and corrosion resistant enamel coatings, belong to high temperature protection technical field.According to parts by weight, it successively weighs: 50~60 parts of silica, 5~8 parts of aluminium oxide, 5~7 parts of zirconium oxides, 5~6 parts of magnesia, 4~6 parts of boron oxides, 1~3 part of nickel oxide, 2~3 parts of sodium oxide molybdenas and 10~18 parts of additives, silica and aluminium oxide are mixed, and zirconium oxide is added, magnesia, boron oxide, nickel oxide, sodium oxide molybdena and additive, after mixing and ball milling, obtain enamel micro mist, enamel micro mist is mixed with dehydrated alcohol 1:3~1:5 in mass ratio, and the dispersing agent of 0.1~0.2 times of enamel micro mist quality is added, it is stirred, obtain mixed slurry, by mixed slurry spraying and blank surface, blank must be pre-processed, after blank drying being pre-processed, sintering, up to heat and corrosion resistant enamel coating.Gained heat and corrosion resistant enamel coating of the invention has excellent heat and corrosion resistant performance.
Description
Technical field
The invention discloses a kind of heat and corrosion resistant enamel coatings, belong to high temperature protection technical field.
Background technique
Traditional high-temperature protection coating includes metal coating and ceramic coating.Metal coating, such as calorized coating and cladding
MCrAH coating seriously affects the high temperature power of alloy since there are apparent counterdiffusion with matrix alloy during applied at elevated temperature
Learn performance.In addition, the oxide that metal coating surface generates continued dissolution in deposition salt cannot be fast in heat erosion environment
Speed forms protective oxide film, and heat erosion rate is very fast.The hot corrosion resistance of ceramic coating is excellent compared with metal coating, but by
In its interface cohesion poor and weaker with the biggish coefficient of linear thermal expansion of alloy substrate, under thermal cycle conditions, coating is easy
Cracking peels off, and acts on to lose the high temperature protection of alloy substrate.
Enamel coating with alloy substrate due to that during being sintered preparation, can react to form the chemistry at interface
In conjunction with the anti-interface peel-ability of coating is better than traditional ceramic coating under thermal cycle conditions.In addition its excellent resistance oxygen diffusion
Ability, the high temperature oxidation resistance of enamel coating are better than traditional metal coating again.Enamel coating is mainly by oxygen-octahedron knot
Structure composition forms glass web by adding other tetravalences, trivalent, divalent even monovalent ion in the gap of oxygen-octahedron
Shape structure.Due to being added to excessive low melting point constituent element in general low melting point enamel coating, such as ZnO, Na2O and K2O, in height
During warmly taking labour, the low melting point constituent element in enamel coating is easy to react with the Cr in alloy substrate, and is finally applying
Layer surface, which further aoxidizes, generates a large amount of chromate spinel class corrosion product, such as ZnCr2O4, accelerate the heat of enamel coating
Corrosion rate.Secondly, the addition of a large amount of low melting point constituent elements, has interrupted the silicon oxygen bond in oxygen-octahedron, so that in corrosive medium
Alloy ion be easier to penetrate into enamel coating, so that the softening point of enamel coating is further decreased, so that sulphur and chlorine
Ion can more easily penetrate through enamel coating until alloy substrate, reduces the heat and corrosion resistant ability of enamel coating.
Summary of the invention
The present invention solves the technical problem of: for the bad problem of traditional enamel coating heat and corrosion resistant performance, mention
A kind of heat and corrosion resistant enamel coating is supplied.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
A kind of heat and corrosion resistant enamel coating, is made of the raw material of following parts by weight: 50~60 parts of silica, 5~8 parts of oxygen
Change aluminium, 5~7 parts of zirconium oxides, 5~6 parts of magnesia, 4~6 parts of boron oxides, 1~3 part of nickel oxide and 2~3 parts of sodium oxide molybdenas, it is described resistance to
Heat erosion enamel coating further include: the additive that 0.2~0.3 times of silica quality；
The additive the preparation method comprises the following steps:
Mixed-powder is calcined, is washed, it is dry, pretreatment powder is obtained, by pretreatment powder and water 1:10~1 in mass ratio；15
Mixing, and the polyallylamine hydrochlorides of 0.5~0.8 times of powder quality of pretreatment are added, after being stirred, it is mixed that powder must be pre-processed
Object is closed, under the conditions of high-speed stirred, 0.1~0.5 times of mixture of powders quality of pretreatment is added into pretreatment mixture of powders
Modified glucose solution, after being stirred to react, be added and pre-process 0.08~0.10 times of mixture of powders quality of sodium borohydride, after
It is continuous to be stirred to react, it filters, it is dry, obtain modified powder；Modified powder is mixed with butyl titanate 1:1~1:2 in mass ratio, and
8~10 times of modified powder quality of dehydrated alcohol and 0.1~0.2 times of modified powder quality of hydrochloric acid is added, after being stirred, obtains
Modified powder mixture mixes modified powder mixture with water 5:1~8:1 in mass ratio, after being stirred to react, filters, dry,
High temperature sintering, discharging, obtains additive.
The preparation method of the heat and corrosion resistant enamel coating is to form by raw material, each component is weighed, by each component mixing ball
Mill, obtains enamel micro mist, enamel micro mist is mixed with dehydrated alcohol 1:3~1:5 in mass ratio, and enamel micro mist quality 0.1 is added
~0.2 times of dispersing agent, is stirred, and obtains mixed slurry, by mixed slurry spraying and blank surface, obtains pretreatment blank, will
After pre-processing blank drying, sintering forms heat and corrosion resistant enamel coating in blank surface；The dispersing agent is dispersing agent NNO,
Any one in Dispersant MF or dispersing agent 5040.
The mixed-powder is to obtain titanium dioxide and potassium carbonate 4.0:1.3~4.0:1.5 mixed grinding in molar ratio mixed
Close powder.
The calcination temperature is 700~800 DEG C.
The modified glucose solution is to mix glucose with Potassiumiodate 1:2 in mass ratio, and glucose quality is added
20~30 times of water after being stirred to react, is added 5~8 times of glucose quality of barium chloride solution, is stirred, filters, must filter
Liquid mixes filtrate with metabisulfite solution 1:2 in mass ratio, filtering, and removal precipitating obtains modified glucose mixed liquor.
The temperature of the high temperature sintering is 500~700 DEG C.
The beneficial effects of the present invention are:
Additive is added when preparing heat and corrosion resistant enamel coating in the present invention, firstly, four titaniums in additive containing lamellar structure
Sour potassium can be used as connection bridge after being added in product, so that the cohesive force of product be made to improve, and then propose the density of product
Height improves the heat resistance of product, secondly as the lamellar structure of potassium tetratitanate, can cover the hole of interiors of products, thus
The porosity exposed the product in air is reduced, and then further increases the heat/corrosion resistance of product, also, potassium tetratitanate
For metastable crystal form, at high operating temperatures, potassium tetratitanate can concurrently be born from poly- phenomenon to potassium hexatitanate crystal transfer, and then make to produce
Density in product further increases, and improves the heat/corrosion resistance of product, furthermore, additive in the subsequent sintering process, lamella
The polyallylamine hydrochlorides and modified glucose being added between structure first carbonize under the high temperature conditions, and in subsequent sintering process
It is consumed, is filled between lamellar structure to generate gas, and then reduce the thermal conductivity of additive, and then make the heat-resisting of product
Corrosivity further increases.
Specific embodiment
Glucose and Potassiumiodate 1:2 in mass ratio are mixed in flask, and be added into flask glucose quality 20~
30 times of water, in temperature be 40~70 DEG C, under conditions of revolving speed is 300~380r/min, after being stirred to react 2~4h, then to burning
The mass fraction that 5~8 times of glucose quality are added in bottle is 20~25% barium chloride solutions, is 20~30 DEG C in temperature, revolving speed is
Under conditions of 250~350r/min, after being stirred 30~60min, filtering obtains filtrate, by filtrate and parts by weight be 20~
35% metabisulfite solution 1:2 in mass ratio mixing, in temperature be 20~30 DEG C, revolving speed be 250~350r/min under conditions of,
After being stirred 30~60min, filtering, removal precipitating obtains modified glucose mixed liquor；After mixed-powder is calcined 12~18h,
Powder batch must be pre-processed, powder batch will be pre-processed and first use mass fraction be 12~15% salt acid elution for 5~8 times after, then use
Deionized water is washed 5~8 times, and by the pretreatment powder after washing be 80~90 DEG C in temperature under conditions of after dry 1~3h,
Powder must be pre-processed, by pretreatment powder and water 1:10~1 in mass ratio；15 are mixed in beaker, and are added in advance into beaker
The polyallylamine hydrochlorides of 0.5~0.8 times of powder quality of processing are 40~45 DEG C in temperature, and revolving speed is 300~400r/min's
Under the conditions of, after being stirred 20~30min, pretreatment mixture of powders is obtained, under conditions of revolving speed is 600~850r/min,
The modified glucose solution of 0.1~0.5 times of mixture of powders quality of pretreatment is added into pretreatment mixture of powders, in temperature
Be 40~55 DEG C, revolving speed be 280~350r/min under conditions of, after being stirred to react 1~2h, then to pretreatment mixture of powders with
The sodium borohydride of 0.08~0.10 times of mixture of powders quality of pretreatment is added in the mixture of modified glucose solution, continues at
Temperature is 50~60 DEG C, and under conditions of revolving speed is 300~320r/min, after being stirred to react 2~3h, filtering obtains modified powder base
Material obtains modified powder under conditions of being 70~80 DEG C in temperature by modified powder blank after dry 1~3h；By modified powder with
Butyl titanate 1:1~1:2 in mass ratio is mixed in three-necked flask, and into three-necked flask be added modified powder quality 8~
10 times of dehydrated alcohol and 0.1~0.2 times of modified powder quality of hydrochloric acid, in temperature be 30~45 DEG C, revolving speed be 200~
Under conditions of 350r/min, after being stirred 1~2h, modified powder mixture is obtained, modified powder mixture and water are pressed into quality
Than 5:1~8:1 mix, in temperature be 45~65 DEG C, revolving speed be 300~350r/min under conditions of, after being stirred to react 8~10h,
Filtering, obtains filter cake, under conditions of being 60~80 DEG C in temperature by filter cake after dry 1~2h, additive blank is obtained, by additive base
Material moves into Muffle furnace, and is passed through nitrogen into Muffle furnace with the rate of 5~20mL/min, high temperature sintering 1 under nitrogen atmosphere
After~2h, discharging obtains additive；According to parts by weight, it successively weighs: 50~60 parts of silica, 5~8 parts of aluminium oxide, 5~7
Part zirconium oxide, 5~6 parts of magnesia, 4~6 parts of boron oxides, 1~3 part of nickel oxide, 2~3 parts of sodium oxide molybdenas and 10~18 parts of additives,
Silica and aluminium oxide are mixed in ball mill, and zirconium oxide is added into ball mill, magnesia, boron oxide, nickel oxide,
Sodium oxide molybdena and additive, and zirconium oxide ball milling pearl is added by ratio of grinding media to material 3:1, after 1~2h of mixing and ball milling, enamel micro mist is obtained, will be warded off
In porcelain micro mist and dehydrated alcohol 1:3~1:5 mixing and blending machine in mass ratio, and enamel micro mist quality 0.1 is added into blender
~0.2 times of dispersing agent is 30~45 DEG C in temperature, under conditions of revolving speed is 350~450r/min, it is stirred 40~
After 50min, mixed slurry is obtained, by mixed slurry spraying and blank surface, obtains pretreatment blank, is in temperature by pretreatment blank
It under conditions of 80~90 DEG C after dry 1~2h, moves into Muffle furnace, is sintered after 2~4h under air atmosphere to get heat and corrosion resistant
Enamel coating.The dispersing agent is dispersing agent NNO, any one in Dispersant MF or dispersing agent 5040.The mixed-powder is
By titanium dioxide and potassium carbonate 4.0:1.3~4.0:1.5 mixed grinding in molar ratio, mixed-powder is obtained.The calcination temperature is
700~800 DEG C.The temperature of the high temperature sintering is 500~700 DEG C.
Glucose and Potassiumiodate 1:2 in mass ratio are mixed in flask, and 30 times of glucose quality are added into flask
Water, in temperature be 70 DEG C, revolving speed be 380r/min under conditions of, after being stirred to react 4h, then into flask be added grape saccharic
The mass fraction of 8 times of amount is 25% barium chloride solution, is 30 DEG C in temperature, under conditions of revolving speed is 350r/min, is stirred
After 60min, filtering obtains filtrate, and filtrate is mixed with the metabisulfite solution 1:2 in mass ratio that parts by weight are 35%, is in temperature
30 DEG C, under conditions of revolving speed is 350r/min, after being stirred 60min, filtering, removal precipitating obtains modified glucose mixed liquor；
After mixed-powder is calcined 18h, pretreatment powder batch is obtained, will pre-process powder batch and first use mass fraction is 15% hydrochloric acid
It after washing 8 times, then is washed with deionized 8 times, and the pretreatment powder after washing is dry under the conditions of at a temperature of 90 °C
After 3h, pretreatment powder is obtained, by pretreatment powder and water in mass ratio 1；15 are mixed in beaker, and pre- place is added into beaker
The polyallylamine hydrochlorides of 0.8 times of powder quality of reason are 45 DEG C in temperature, under conditions of revolving speed is 400r/min, are stirred
After 30min, pretreatment mixture of powders is obtained, under conditions of revolving speed is 850r/min, is added into pretreatment mixture of powders
The modified glucose solution of 0.5 times of mixture of powders quality of pretreatment is 55 DEG C in temperature, and revolving speed is the condition of 350r/min
Under, after being stirred to react 2h, then pretreatment powder is added into the mixture of pretreatment mixture of powders and modified glucose solution
The sodium borohydride that 0.10 times of mixture quality, continuing at temperature is 60 DEG C, under conditions of revolving speed is 320r/min, is stirred to react 3h
Afterwards, it filters, obtains modified powder blank, under conditions of being 80 DEG C in temperature by modified powder blank after dry 3h, obtain modified powder；
Modified powder and butyl titanate 1:2 in mass ratio are mixed in three-necked flask, and modified powder is added into three-necked flask
The dehydrated alcohol and 0.2 times of modified powder quality of hydrochloric acid that 10 times of quality are 45 DEG C in temperature, and revolving speed is the condition of 350r/min
Under, after being stirred 2h, modified powder mixture is obtained, modified powder mixture is mixed with water 8:1 in mass ratio, is in temperature
65 DEG C, under conditions of revolving speed is 350r/min, after being stirred to react 10h, filtering obtains filter cake, the item for being 80 DEG C in temperature by filter cake
Under part after dry 2h, additive blank is obtained, additive blank is moved into Muffle furnace, and into Muffle furnace with the speed of 20mL/min
Rate is passed through nitrogen, and under nitrogen atmosphere after high temperature sintering 2h, discharging obtains additive；According to parts by weight, it successively weighs: 60 parts
Silica, 8 parts of aluminium oxide, 7 parts of zirconium oxides, 6 parts of magnesia, 6 parts of boron oxides, 3 parts of nickel oxide, 3 parts of sodium oxide molybdenas and 18 parts add
Add agent, silica and aluminium oxide are mixed in ball mill, and zirconium oxide is added into ball mill, magnesia, boron oxide, oxygen
Change nickel, sodium oxide molybdena and additive, and zirconium oxide ball milling pearl is added by ratio of grinding media to material 3:1, and after mixing and ball milling 2h, enamel micro mist is obtained, it will
In enamel micro mist and dehydrated alcohol 1:5 mixing and blending machine in mass ratio, and 0.2 times of enamel micro mist quality is added into blender
Dispersing agent is 45 DEG C in temperature, under conditions of revolving speed is 450r/min, after being stirred 50min, obtains mixed slurry, will mix
Slurry spraying and blank surface, obtain pretreatment blank, and pretreatment blank after dry 2h, is moved under the conditions of at a temperature of 90 °C
In Muffle furnace, it is sintered after 4h under air atmosphere to get heat and corrosion resistant enamel coating.The dispersing agent is dispersing agent NNO.It is described
Mixed-powder is that titanium dioxide and potassium carbonate 4.0:1.5 mixed grinding in molar ratio are obtained mixed-powder.The calcination temperature is
800℃.The temperature of the high temperature sintering is 700 DEG C.
Glucose and Potassiumiodate 1:2 in mass ratio are mixed in flask, and 30 times of glucose quality are added into flask
Water, in temperature be 70 DEG C, revolving speed be 380r/min under conditions of, after being stirred to react 4h, then into flask be added grape saccharic
The mass fraction of 8 times of amount is 25% barium chloride solution, is 30 DEG C in temperature, under conditions of revolving speed is 350r/min, is stirred
After 60min, filtering obtains filtrate, and filtrate is mixed with the metabisulfite solution 1:2 in mass ratio that parts by weight are 35%, is in temperature
30 DEG C, under conditions of revolving speed is 350r/min, after being stirred 60min, filtering, removal precipitating obtains modified glucose mixed liquor；
After mixed-powder is calcined 18h, pretreatment powder batch is obtained, will pre-process powder batch and first use mass fraction is 15% hydrochloric acid
It after washing 8 times, then is washed with deionized 8 times, and the pretreatment powder after washing is dry under the conditions of at a temperature of 90 °C
After 3h, pretreatment powder is obtained, by pretreatment powder and water in mass ratio 1；15 are mixed in beaker, in temperature be 45 DEG C, revolving speed
Under conditions of 400r/min, after being stirred 30min, pretreatment mixture of powders is obtained, in the condition that revolving speed is 850r/min
Under, the modified glucose solution of 0.5 times of mixture of powders quality of pretreatment is added into pretreatment mixture of powders, is in temperature
55 DEG C, under conditions of revolving speed is 350r/min, after being stirred to react 2h, then to pretreatment mixture of powders and modified glucose solution
Mixture in be added and pre-process 0.10 times of mixture of powders quality of sodium borohydride, continuing at temperature is 60 DEG C, and revolving speed is
Under conditions of 320r/min, after being stirred to react 3h, filtering, obtain modified powder blank, by modified powder blank in temperature be 80 DEG C
Under conditions of after dry 3h, obtain modified powder；Modified powder and butyl titanate 1:2 in mass ratio are mixed in three-necked flask
In, and 10 times of modified powder quality of dehydrated alcohol and 0.2 times of modified powder quality of hydrochloric acid, Yu Wen are added into three-necked flask
Degree is 45 DEG C, under conditions of revolving speed is 350r/min, after being stirred 2h, obtains modified powder mixture, modified powder is mixed
Object is mixed with water 8:1 in mass ratio, is 65 DEG C in temperature, under conditions of revolving speed is 350r/min, after being stirred to react 10h, is filtered,
Filter cake is obtained, under conditions of being 80 DEG C in temperature by filter cake after dry 2h, additive blank is obtained, additive blank is moved into Muffle furnace
In, and nitrogen is passed through with the rate of 20mL/min into Muffle furnace, under nitrogen atmosphere after high temperature sintering 2h, discharging must be added
Agent；According to parts by weight, it successively weighs: 60 parts of silica, 8 parts of aluminium oxide, 7 parts of zirconium oxides, 6 parts of magnesia, 6 parts of oxidations
Boron, 3 parts of nickel oxide, 3 parts of sodium oxide molybdenas and 18 parts of additives, silica and aluminium oxide are mixed in ball mill, and to ball milling
Zirconium oxide, magnesia, boron oxide, nickel oxide, sodium oxide molybdena and additive are added in machine, and zirconia ball is added by ratio of grinding media to material 3:1
Pearl is ground, after mixing and ball milling 2h, obtains enamel micro mist, by enamel micro mist and dehydrated alcohol 1:5 mixing and blending machine in mass ratio, and to
The dispersing agent of 0.2 times of enamel micro mist quality is added in blender, is 45 DEG C in temperature, under conditions of revolving speed is 450r/min, stirs
Mix mixing 50min after, obtain mixed slurry, by mixed slurry spraying and blank surface, obtain pretreatment blank, will pretreatment blank in
It under the conditions of at a temperature of 90 °C after dry 2h, moves into Muffle furnace, is sintered after 4h under air atmosphere to get heat and corrosion resistant enamel
Coating.The dispersing agent is dispersing agent NNO.The mixed-powder is that 4.0:1.5 is mixed in molar ratio by titanium dioxide and potassium carbonate
Grinding is closed, mixed-powder is obtained.The calcination temperature is 800 DEG C.The temperature of the high temperature sintering is 700 DEG C.
Glucose and Potassiumiodate 1:2 in mass ratio are mixed in flask, and 30 times of glucose quality are added into flask
Water, in temperature be 70 DEG C, revolving speed be 380r/min under conditions of, after being stirred to react 4h, then into flask be added grape saccharic
The mass fraction of 8 times of amount is 25% barium chloride solution, is 30 DEG C in temperature, under conditions of revolving speed is 350r/min, is stirred
After 60min, filtering obtains filtrate, and filtrate is mixed with the metabisulfite solution 1:2 in mass ratio that parts by weight are 35%, is in temperature
30 DEG C, under conditions of revolving speed is 350r/min, after being stirred 60min, filtering, removal precipitating obtains modified glucose mixed liquor；
After mixed-powder is calcined 18h, pretreatment powder batch is obtained, will pre-process powder batch and first use mass fraction is 15% hydrochloric acid
It after washing 8 times, then is washed with deionized 8 times, and the pretreatment powder after washing is dry under the conditions of at a temperature of 90 °C
After 3h, pretreatment powder is obtained, by pretreatment powder and water in mass ratio 1；15 are mixed in beaker, and pre- place is added into beaker
The polyallylamine hydrochlorides of 0.8 times of powder quality of reason are 45 DEG C in temperature, under conditions of revolving speed is 400r/min, are stirred
After 30min, pretreatment mixture of powders is obtained, then pretreatment mixture of powders quality 0.10 is added into pretreatment mixture of powders
Sodium borohydride again, continuing at temperature is 60 DEG C, and under conditions of revolving speed is 320r/min, after being stirred to react 3h, filtering obtains modification
Powder batch obtains modified powder under conditions of being 80 DEG C in temperature by modified powder blank after dry 3h；By modified powder and titanium
Acid four butyl esters 1:2 in mass ratio is mixed in three-necked flask, and 10 times of modified powder quality anhydrous is added into three-necked flask
Ethyl alcohol and 0.2 times of modified powder quality of hydrochloric acid are 45 DEG C in temperature, under conditions of revolving speed is 350r/min, are stirred 2h
Afterwards, modified powder mixture is obtained, modified powder mixture is mixed with water 8:1 in mass ratio, is 65 DEG C in temperature, revolving speed is
Under conditions of 350r/min, after being stirred to react 10h, filtering obtains filter cake, dry 2h under conditions of being 80 DEG C in temperature by filter cake
Afterwards, additive blank is obtained, additive blank is moved into Muffle furnace, and nitrogen is passed through with the rate of 20mL/min into Muffle furnace
Gas, under nitrogen atmosphere after high temperature sintering 2h, discharging obtains additive；According to parts by weight, it successively weighs: 60 parts of silica,
8 parts of aluminium oxide, 7 parts of zirconium oxides, 6 parts of magnesia, 6 parts of boron oxides, 3 parts of nickel oxide, 3 parts of sodium oxide molybdenas and 18 parts of additives, by two
Silica and aluminium oxide are mixed in ball mill, and zirconium oxide is added into ball mill, magnesia, boron oxide, nickel oxide, oxidation
Sodium and additive, and zirconium oxide ball milling pearl is added by ratio of grinding media to material 3:1, after mixing and ball milling 2h, obtain enamel micro mist, by enamel micro mist with
In dehydrated alcohol 1:5 mixing and blending machine in mass ratio, and into blender be added 0.2 times of enamel micro mist quality dispersing agent, in
Temperature be 45 DEG C, revolving speed be 450r/min under conditions of, after being stirred 50min, obtain mixed slurry, by mixed slurry spraying with
Blank surface obtains pretreatment blank, and pretreatment blank after dry 2h, is moved into Muffle furnace under the conditions of at a temperature of 90 °C,
It is sintered after 4h under air atmosphere to get heat and corrosion resistant enamel coating.The dispersing agent is dispersing agent NNO.The mixed-powder
To obtain mixed-powder for titanium dioxide and potassium carbonate 4.0:1.5 mixed grinding in molar ratio.The calcination temperature is 800 DEG C.Institute
The temperature for stating high temperature sintering is 700 DEG C.
Glucose and Potassiumiodate 1:2 in mass ratio are mixed in flask, and 30 times of glucose quality are added into flask
Water, in temperature be 70 DEG C, revolving speed be 380r/min under conditions of, after being stirred to react 4h, then into flask be added grape saccharic
The mass fraction of 8 times of amount is 25% barium chloride solution, is 30 DEG C in temperature, under conditions of revolving speed is 350r/min, is stirred
After 60min, filtering obtains filtrate, and filtrate is mixed with the metabisulfite solution 1:2 in mass ratio that parts by weight are 35%, is in temperature
30 DEG C, under conditions of revolving speed is 350r/min, after being stirred 60min, filtering, removal precipitating obtains modified glucose mixed liquor；
After mixed-powder is calcined 18h, pretreatment powder batch is obtained, will pre-process powder batch and first use mass fraction is 15% hydrochloric acid
It after washing 8 times, then is washed with deionized 8 times, and the pretreatment powder after washing is dry under the conditions of at a temperature of 90 °C
After 3h, pretreatment powder is obtained, by pretreatment powder and water in mass ratio 1；15 are mixed in beaker, and pre- place is added into beaker
The polyallylamine hydrochlorides of 0.8 times of powder quality of reason are 45 DEG C in temperature, under conditions of revolving speed is 400r/min, are stirred
After 30min, pretreatment mixture of powders is obtained, under conditions of revolving speed is 850r/min, is added into pretreatment mixture of powders
The modified glucose solution of 0.5 times of mixture of powders quality of pretreatment is 55 DEG C in temperature, and revolving speed is the condition of 350r/min
Under, after being stirred to react 2h, then pretreatment powder is added into the mixture of pretreatment mixture of powders and modified glucose solution
The sodium borohydride that 0.10 times of mixture quality, continuing at temperature is 60 DEG C, under conditions of revolving speed is 320r/min, is stirred to react 3h
Afterwards, it filters, obtains modified powder blank, under conditions of being 80 DEG C in temperature by modified powder blank after dry 3h, obtain modified powder；
Modified powder is added in three-necked flask, and 10 times of modified powder quality of dehydrated alcohol and modified powder are added into three-necked flask
The hydrochloric acid of 0.2 times of last quality is 45 DEG C in temperature, under conditions of revolving speed is 350r/min, after being stirred 2h, obtains modified powder
Mixture mixes modified powder mixture with water 8:1 in mass ratio, is 65 DEG C in temperature, revolving speed is the condition of 350r/min
Under, after being stirred to react 10h, filtering obtains filter cake, under conditions of being 80 DEG C in temperature by filter cake after dry 2h, additive blank is obtained,
Additive blank is moved into Muffle furnace, and nitrogen is passed through with the rate of 20mL/min into Muffle furnace, it is high under nitrogen atmosphere
After temperature sintering 2h, discharging obtains additive；According to parts by weight, it successively weighs: 60 parts of silica, 8 parts of aluminium oxide, 7 parts of oxidations
Zirconium, 6 parts of magnesia, 6 parts of boron oxides, 3 parts of nickel oxide, 3 parts of sodium oxide molybdenas and 18 parts of additives mix silica and aluminium oxide
In ball mill, and zirconium oxide is added into ball mill, magnesia, boron oxide, nickel oxide, sodium oxide molybdena and additive, and press ball
Expect that zirconium oxide ball milling pearl is added than 3:1, after mixing and ball milling 2h, obtains enamel micro mist, in mass ratio with dehydrated alcohol by enamel micro mist
In 1:5 mixing and blending machine, and the dispersing agent of 0.2 times of enamel micro mist quality is added into blender, is 45 DEG C in temperature, revolving speed is
Under conditions of 450r/min, after being stirred 50min, mixed slurry is obtained, mixed slurry spraying and blank surface must pre-process
Pretreatment blank after dry 2h, is moved into Muffle furnace under the conditions of at a temperature of 90 °C, is sintered 4h under air atmosphere by blank
Afterwards to get heat and corrosion resistant enamel coating.The dispersing agent is dispersing agent NNO.The mixed-powder is by titanium dioxide and carbonic acid
Potassium 4.0:1.5 mixed grinding in molar ratio, obtains mixed-powder.The calcination temperature is 800 DEG C.The temperature of the high temperature sintering is
700℃。
Comparative example: the enamel coating of Shanghai coating Co., Ltd production.
1 to 4 gained enamel coating of example and comparative example product are subjected to performance detection, the specific detection method is as follows:
Above-mentioned enamel coating is subjected to the experiment of heat and corrosion resistant performance through 900 DEG C of salt corrosion, specific testing result is as shown in table 1:
Table 1: performance detection table
By 1 testing result of table it is found that present invention gained heat and corrosion resistant enamel coating has excellent heat and corrosion resistant performance.
Claims (6)
1. a kind of heat and corrosion resistant enamel coating, is made of the raw material of following parts by weight: 50~60 parts of silica, 5~8 parts
Aluminium oxide, 5~7 parts of zirconium oxides, 5~6 parts of magnesia, 4~6 parts of boron oxides, 1~3 part of nickel oxide and 2~3 parts of sodium oxide molybdenas, it is special
Sign is, the heat and corrosion resistant enamel coating further include: the additive that 0.2~0.3 times of silica quality；
The additive the preparation method comprises the following steps:
Mixed-powder is calcined, is washed, it is dry, pretreatment powder is obtained, by pretreatment powder and water 1:10~1 in mass ratio；15
Mixing, and the polyallylamine hydrochlorides of 0.5~0.8 times of powder quality of pretreatment are added, after being stirred, it is mixed that powder must be pre-processed
Object is closed, under the conditions of high-speed stirred, 0.1~0.5 times of mixture of powders quality of pretreatment is added into pretreatment mixture of powders
Modified glucose solution, after being stirred to react, be added and pre-process 0.08~0.10 times of mixture of powders quality of sodium borohydride, after
It is continuous to be stirred to react, it filters, it is dry, obtain modified powder；Modified powder is mixed with butyl titanate 1:1~1:2 in mass ratio, and
8~10 times of modified powder quality of dehydrated alcohol and 0.1~0.2 times of modified powder quality of hydrochloric acid is added, after being stirred, obtains
Modified powder mixture mixes modified powder mixture with water 5:1~8:1 in mass ratio, after being stirred to react, filters, dry,
High temperature sintering, discharging, obtains additive.
2. a kind of heat and corrosion resistant enamel coating according to claim 1, it is characterised in that: the heat and corrosion resistant enamel coating
Preparation method be to be formed by raw material, weigh each component and each component mixing and ball milling obtained into enamel micro mist, by enamel micro mist and nothing
Water-ethanol 1:3~1:5 in mass ratio mixing, and the dispersing agent of 0.1~0.2 times of enamel micro mist quality is added, it is stirred, obtains mixed
Slurry is closed, by mixed slurry spraying and blank surface, obtains pretreatment blank, after pretreatment blank drying, sintering, i.e., in blank
Surface forms heat and corrosion resistant enamel coating；The dispersing agent is dispersing agent NNO, any one in Dispersant MF or dispersing agent 5040
Kind.
3. a kind of heat and corrosion resistant enamel coating according to claim 1, it is characterised in that: the mixed-powder is by dioxy
Change titanium and potassium carbonate 4.0:1.3~4.0:1.5 mixed grinding in molar ratio, obtains mixed-powder.
4. a kind of heat and corrosion resistant enamel coating according to claim 1, it is characterised in that: the calcination temperature be 700~
800℃。
5. a kind of heat and corrosion resistant enamel coating according to claim 1, it is characterised in that: the modified glucose solution is
Glucose is mixed with Potassiumiodate 1:2 in mass ratio, and 20~30 times of glucose quality of water is added, after being stirred to react, is added
The barium chloride solution that 5~8 times of glucose quality, is stirred, and filtering obtains filtrate, in mass ratio with metabisulfite solution by filtrate
1:2 mixing, filtering, removal precipitating obtain modified glucose mixed liquor.
6. a kind of heat and corrosion resistant enamel coating according to claim 1, it is characterised in that: the temperature of the high temperature sintering is
500~700 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106503A (en) * | 2019-06-19 | 2019-08-09 | 东北大学 | A kind of resistance to melting liquid zinc corrosion and the coating of abrasion and preparation method thereof |
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