CN108516685A - Heat and corrosion resistant enamel coating and preparation method thereof - Google Patents
Heat and corrosion resistant enamel coating and preparation method thereof Download PDFInfo
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- CN108516685A CN108516685A CN201810359870.6A CN201810359870A CN108516685A CN 108516685 A CN108516685 A CN 108516685A CN 201810359870 A CN201810359870 A CN 201810359870A CN 108516685 A CN108516685 A CN 108516685A
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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
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-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
Abstract
The invention belongs to enamel material technical fields, and in particular to a kind of heat and corrosion resistant enamel coating and preparation method thereof.For it is easy to fall off, heat resistance is bad under existing enamel coating high temperature the problems such as, the present invention provides a kind of heat and corrosion resistant enamel coating and preparation method thereof.The present invention prepares heat and corrosion resistant enamel coating and first burns out base enamel layer in metal base surface, cover-coat enamel slurry is sprayed to the enamel coating surface baked again, through 130~150 DEG C of dryings, heat and corrosion resistant enamel coating is made in 900~950 DEG C of 12~15min of enamel firing.The heat and corrosion resistant enamel coating of the present invention belongs to indifferent oxide system, with good, the extremely low oxygen migration rate of richness, has good thermal stability and inoxidizability, acid and alkali-resistance, anticorrosion effect are good.
Description
Technical field
The invention belongs to enamel material technical fields, and in particular to a kind of heat and corrosion resistant enamel coating and preparation method thereof.
Background technology
Turbine, steam turbine, gas turbine and heat power plant boiler etc. be coal-fired, in oil burning installation thermal part hot junction
Component general work is in harsh environment.These adverse circumstances can cause the destructions such as erosion, high-temperature oxydation, heat erosion.
When high-temperature metal parts are in 600 DEG C~1200 DEG C working environments, it is typically due to the impurity contained in fuel, such as
Sulphur, potassium, sodium etc. form SO in burning2、SO3、H2The gases such as S react and the corruption of accelerated material with oxygen, the NaCl etc. in air
Erosion even causes catastrophic accident sometimes.When heat erosion occurs, metal surface can deposit one layer of salt film, after salt film is formed, hair
Heat corrosion degree just with the fuse salt (NaCl, Na2SO4) related to adhesiveness, the wellability of metal surface.It is deposited on table
Many sulfate or salt-mixture film on face are all in a liquid state at high temperature, therefore accelerate the corrosion of metal material.Currently, preventing
The method of metal surface salt corrosion is mainly to coat the coating of heat and corrosion resistant.
Traditional defense coating mainly has the alloy coats such as thermal diffusion coating and TiAlCr.Although TiAlCr coatings can be notable
Antioxygenic property is improved, but during long service, coating/matrix counterdiffusion can cause the Al in coating to be lost in, and then cannot tie up
Hold surface A l2O3Growth, TiAlCr coatings perform poor in heat erosion environment.And thermal diffusion coating utilizes chromising and aluminising,
Then so that alloy surface is formed chromium oxide and aluminium oxide through pre-oxidation and although play the role of protective film, but equally NaCl,
Na2SO4Heat fusing salt environment in, sulfate or mixed salt film are in a liquid state under high temperature, are adhered to thermal diffusion coating surface and oxygen
Change aluminium and heat erosion generation AlCl occurs3Or Al2(SO4)3Erosion.
In recent years, enamel coating causes the great interest of people because of its excellent resistance to high temperature oxidation and hot corrosion resistance,
Enamel coating belongs to inertial oxide coating, has extremely low oxygen migration rate, is not only remarkably improved antioxygenic property, also can
Significantly improve heat and corrosion resistant performance.
Enamel coating is inorganic ceramic glaze layer of the blackening on metal bottom base surface.Enamel coating does not need expensive thermal spraying
With the equipment such as electro beam physics vapour deposition, there is good economy.The general preparative methods of enamel coating are first by raw material
It is fired into vitreous enamel block, is then milled to fine powder, sprays to piece surface, high temperature enamel firing is finally carried out, is formed in piece surface
Coating, having prevents the performances such as metal erosion, wear-resisting, heat-resisting, nontoxic.Enamel has the acid corrosion-resistant performance of height, surface light
It is clean, to be not easy to be stained with ash, hardness high, wear-resistant, while there is good heat transfer coefficient and thermal capacitance.
Traditional enamel technology is mainly based upon mild steel research：
Patent CN201310419123.4 provides a kind of surface alloy refractory coating composite material, by with face-centered cubic
The metal alloy powders and enamel powder of structure are constituted, and composition proportion is 10~70wt% metal alloy powders to enhance phase oxidation
Aluminium, quartz, ZrO2、Cr2O3、AlN、Si3N4With two kinds of metal alloy powders NiCrAlX, NiCrX and NiCoCrAlX mischmetal
Or two or more rare earth elements use simultaneously or one kind or multiple combinations of rare earth element and Na, K, Ca, Sr, Ba use, then with
Enamel and alumina particle, which are uniformly mixed, forms tri compound coating, and the powdery pulp mixed is sprayed at high-temperature material part
Surface carries out high-temperature process to the part sprayed.Form the thermal protection coating of hard surface alloy coat composite material.
Frit for porcelain enamel in the patent added with AlN and metal alloy powders NiCrAlX, in heat erosion environment Al with
Cl-hot melt salt ion pyroreaction generates Cl2, Cl2It can be along the column crystal diffusion admittance of coating surface micro-crack and splash coating
It penetrates into coating, and react with metallic atoms such as Al, Fe in coating, generated at high temperature with volatile AlCl3Or
FeCl3.The especially direct mixed metal aluminum or aluminum alloy of enamel coating, the Cl under High Temperature Hot-corrosion Behaviorof environment–More easily with Al matrixes
Excessive interfacial reaction occurs, causes the continued dissolution of alloy substrate, and traditional enamel coating low melting point constituent element too high levels, it is right
The resistance diffusion infiltration capacity and heat resistanceheat resistant cycle of heat erosion medium peel off phenomena such as comprehensive performance is poor.
Metal powder is uniformly mixed by patent CN200610047216.9 with enamel powder, and mixed-powder is sprayed at specimen surface,
Metal alloy-enamel coating, metal alloy-enamel-hard are formed on enamel matrix in high temperature sintering metal powder Dispersed precipitate
Reinforced phase coating or metal alloy-enamel coating are prepared into hot corrosion-inhibiting coating with metal alloy-enamel-hard enhancing coating.
600~900 DEG C of the mixed coating firing temperature of metal powder and enamel that the patent is formed is pertaining only to enamel coating
Enamel firing process, metal powder are only simply mixed in the enamel coating of softening, and there is no really formation to arrive enamel coating
In netted oxide structure, when there is higher coefficient of thermal expansion in heat erosion Metals in Environments powder, repeatedly repeatedly heated swollen
It is detached with the reticular structure in enamel layer after swollen, fine crack occurs, to lose to the rotten protective effect of the heat of glaze layer.
Patent CN201410653315.6 provides a kind of compound enamel coating and is made of enamel matrix and ceramic particle,
Middle ceramic particle is the corundum that grain size is less than 5 μm, and additive amount is the 15~30wt% for accounting for compound enamel coating weight.With anhydrous
Ethyl alcohol is dispersant, and finely dispersed compound enamel suspension is obtained through magnetic agitation and 15~30min of supersonic oscillations.With
Compound enamel uniform suspension is sprayed at high temperature alloy parts by air compressor, is dried, is obtained compound through 200~300 DEG C
The original blank of enamel coating cools down to obtain compound enamel coating through 950~1050 DEG C of high temperature sinterings.Enamel matrix composition matches
For：58~62wt% of silica, 10~13wt% of zirconium dioxide, 5~8wt% of alundum (Al2O3), 5~7wt% of calcium oxide, three
Aoxidize two 4~6wt% of boron, 2~4wt% of strontium oxide strontia, 2~6wt% of 2~4wt% of titanium dioxide, sodium oxide molybdena and/or potassium oxide, oxygen
Change 0~2wt% of nickel.
The oxide of patent adhesive agent Co, in 650~750 DEG C of High Temperature Hot-corrosion Behaviorof, the speed of heat erosion, corrosion
Instantaneous vulcanization occurs for the oxide of Co in the process, and then forms CoSO4-Na2SO4Liquid eutectic salt delays protective
Cr2O3The formation of oxidation film can accelerate the speed of heat erosion, be carried out with the depth of heat erosion, compound enamel coating can directly take off
Falling makes metallic matrix that catastrophic corrosion directly occur.
Therefore, existing enamel coating is usually present easy to fall off under high temperature, the bad defect of heat resistance.
Invention content
It asks the technical problem to be solved by the present invention is to easy to fall off under existing enamel coating high temperature, heat resistance is bad etc.
Topic.
The present invention solve above-mentioned technical problem technical solution be：A kind of heat and corrosion resistant enamel coating and its preparation side are provided
Method.
The invention solves first technical problem be a kind of base enamel material, the composition packet of the base enamel material are provided
It includes：It counts in parts by weight, SiO230~33 parts, NaB4O7.4H244~48 parts of O, NaNO316~18 parts, Na2CO313~15
Part, Li2CO31.5~3.5 parts, 8~11 parts of fluorite, Na2SiF61~3 part, Na3AlF66~8 parts, Na4P2O7.10H2O 3~5
Part, Co (NO3)26~8 parts and Ni (NO3)22~4 parts.
The invention solves second technical problem be a kind of preparation method of above-mentioned base enamel material is provided, including with
Lower step：After weighing raw material mixing by weight, be heated at 1300~1350 DEG C melt 2~3h, be transferred in cold water quench it is broken, in
Base enamel material is made in 100~130 DEG C of dry 20~30min.
Wherein, in the preparation method of above-mentioned base enamel material, the heating uses electric furnace.
The invention solves third technical problem be a kind of base enamel material slurry is provided, by above-mentioned base enamel material
100 parts, 15~19 parts of clay, 2~3 parts of bentonite is crushed to -200 mesh >=98% of granularity, adds after 1~2 part of mixing of magnesium sulfate
20~22 parts of water, which is uniformly mixed, to be formed.
The invention solves the 4th technical problem be that a kind of cover-coat enamel material is provided, composition includes：By weight
Number meter, SiO235~42 parts, NaB4O7.4H226~28 parts of O, Na2CO38.5~10 parts, Li2CO33~5 parts, NiO 0.5~
1 part, Na3AlF65~7 parts, Na2CrO43.5~4 parts, NaSbO31~2 part, SrSO41~2 part and Na2MO30.5~1 part.
The invention solves the 5th technical problem be a kind of preparation method of above-mentioned cover-coat enamel material is provided, including with
Lower step：After weighing raw material mixing by weight, be heated at 1200~1250 DEG C melt 2~3h, be transferred in cold water quench it is broken, in
Cover-coat enamel material is made in 100~130 DEG C of dry 20~30min.
The invention solves the 6th technical problem be a kind of cover-coat enamel material slurry is provided, by cover-coat enamel material 100
Part, 11~13 parts of clay, 5~7 parts of bentonite, 4~5 parts of zircon English, 1~2 part of mixing of 25~30 parts of C-BN, LiF are crushed to
25~30 parts of glass powder is added in -200 mesh >=98% of granularity, and 22~25 parts of water, which is uniformly mixed, to be formed.
Wherein, the zircon English is ZrO2Content>65% zircon English.
Wherein, the glass powder is the fine powder for 400 mesh of the mistake sieve that common scrap glass is ground into.
The invention solves the 7th technical problem be a kind of preparation method of heat and corrosion resistant enamel coating is provided, including
Following steps：
A, metal base surface enamel spraying ground-coat enamel material slurry after treatment forms the slurry coating of 0.3~0.5mm,
Dry 30~45min, is transferred to 900~950 DEG C of 12~15min of enamel firing of electric furnace at 130~150 DEG C, cooling, and base enamel is made
Layer；
B, the base enamel layer surface enamel spraying glaze material slurry made from step a forms the slurry of 0.2~0.4mm
Coating at 130~150 DEG C after dry 30~45min, is transferred to 10~12min of enamel firing at a temperature of 850~900 DEG C of electric furnace, cold
But, heat and corrosion resistant enamel coating is made.
Wherein, the metallic matrix include in mild steel Q235, glassed steel BTC245R or cold-rolled carbon steel SPCC at least
It is a kind of.
Wherein, the processing is dry, blasting treatment after being cleaned using detergent.
Beneficial effects of the present invention are：
The present invention adds B in base enamel material2O3, make base enamel that there is preferable metal wetting capacity；In addition,
It or a kind of excellent fluxing agent, keep enamel meltable, melt and can consumingly dissolve FeO without borosilicate melts, make to ward off
There is good thermal stability and inoxidizability in porcelain coating；The cover-coat enamel material of the present invention is containing Cr2O3, NiO and ZrO systems
Floride-free overglaze can slow down corrosion of metal, play antisepsis；Also, add cubic boron nitride in cover-coat enamel material
(C-BN) so that glaze material thermal stability is more preferable, thermal shock resistance bigger；By specific spraying method in metal base surface
Enamel spraying ground-coat enamel material and cover-coat enamel material form a kind of heat and corrosion resistant enamel coating, are added to glass powder so that cover-coat enamel
Expect that chemical property is stablized, acid-alkali-corrosive-resisting, heat erosion effect are good.
Heat and corrosion resistant enamel coating prepared by the present invention is in 75wt%Na2SO4850 DEG C of+25wt%NaCl corrosive mediums salinity
In be recycled oxidation heat erosion 100 times, coating glaze is without peeling phenomenon, the phenomenon that no vulcanization or internal oxidition, heat erosion increment
For 0.08~0.64mg/cm2, it is less than heat-resisting rotten enamel coating performance test increment 7.5mg/cm2, existing metal coating is compared,
The enamel coating of the present invention has the ability of good high-temperature corrosion resistance.
Specific implementation mode
The present invention provides a kind of base enamel material, the composition of the base enamel material includes：It counts in parts by weight, SiO2
30~33 parts, NaB4O7.4H244~48 parts of O, NaNO316~18 parts, Na2CO313~15 parts, Li2CO31.5~3.5 parts, fluorite
8~11 parts, Na2SiF61~3 part, Na3AlF66~8 parts, Na4P2O7.10H23~5 parts of O, Co (NO3)26~8 parts and Ni
(NO3)22~4 parts.
In base enamel material of the present invention, NaB is added4O7.4H2O is decomposed to form in base enamel material sintering procedure
B2O3.The metal wetting capacity that base enamel can be improved, is also used as fluxing agent, keeps base enamel meltable, melt and without borosilicate
Silicate melt can consumingly dissolve FeO, to ensure that metal has inoxidizability at high temperature.Na4P2O7.10H2O is in ground-coat enamel
P is decomposed to form in sintering procedure2O5, part B is substituted in the random network structure of base enamel3+、Si4+The position of atom, phase
Mutually staggeredly, tetrahedral structure is formed, base enamel layer intensity is conducive to, improves the adhesion property of ground-coat enamel and metallic matrix.
The preparation method of above-mentioned base enamel material includes the following steps：After weighing raw material mixing by weight, it is heated to
2~3h is melted at 1300~1350 DEG C, be transferred in cold water quench it is broken, in 100~130 DEG C of dry 20~30min, obtained base enamel
Material.
In order to spray evenly, when the present invention states base enamel material in use, ground-coat enamel material is prepared as base enamel material
Slurry, the slurry is by 100 parts of above-mentioned base enamel material, 15~19 parts of clay, 2~3 parts of bentonite, 1~2 part of mixing of magnesium sulfate
Afterwards, it is crushed to -200 mesh >=98% of granularity, 20~22 parts of addition, which is uniformly mixed, to be formed.
The present invention adds 1~2 part of magnesium sulfate when preparing slurry after, Mg is formed in slurry2+Charged colloidal particles increase slurry
Outstanding milkiness and coating when mobility.
Further, the present invention also provides a kind of cover-coat enamel material, composition includes：It counts in parts by weight, SiO2 35
~42 parts, NaB4O7.4H226~28 parts of O, Na2CO38.5~10 parts, Li2CO33~5 parts, 0.5~1 part of NiO, Na3AlF6
5~7 parts, Na2CrO43.5~4 parts, NaSbO31~2 part, SrSO41~2 part and Na2MO30.5~1 part.
In the glaze material of the present invention, it is particularly added to NiO, it is to form austenite, the main member for having elevated temperature strength
Element can improve the high temperature resistance of glaze material；SiO is additionally incorporated2, the inoxidizability of cover-coat enamel is further increased, is burnt
It is reduced at temperature, oxidation and the diffusion velocity of Ni can also be reduced；In addition it is added to Na2CrO4, CrO is resolved at high temperature3,
It is to improve antioxidative essential element, forms fine and close Cr when corroding, in cover-coat enamel2O3Oxidation film can prevent
Heat salt Cl-、SO4 2-The strong melting of ion destroys, as corrosion carries out, Cr2O3Oxide layer constantly thickens, oxidation film alkalinity
Caused by melting it is loose it is cellular filled by NiO, ZrO and C-BN, so that the diffusion admittance of metallic matrix and oxygen, sulphur is blocked,
Slow down corrosion of metal, plays antisepsis.Therefore, cover-coat enamel material of the invention can improve metallic matrix high temperature resistant, resistance to
The ability of corrosion.
The preparation method of above-mentioned cover-coat enamel material, includes the following steps：After weighing raw material mixing by weight, it is heated to
2~3h is melted at 1200~1250 DEG C, be transferred in cold water quench it is broken, in 100~130 DEG C of dry 20~30min, obtained cover-coat enamel
Material.
Likewise, when stating cover-coat enamel material in use and being sprayed, it can also be prepared into cover-coat enamel material slurry, it is described
Slurry is by 100 parts of cover-coat enamel material, 11~13 parts of clay, 5~7 parts of bentonite, zircon English (ZrO2Content>65%) 4~5 parts,
1~2 part of mixing of 25-30 parts of C-BN, LiF, is crushed to -200 mesh >=98% of granularity, 25~30 parts of 400 mesh glass powder, water is added
22~25 parts be uniformly mixed be prepared.
The present invention adds C-BN and glass powder when preparing above-mentioned slurry.C-BN materials thermal stability is good, Ke Yi
It uses in 1000 DEG C or so of oxidizing atmosphere and in nearly 3000 DEG C of inert atmosphere, is a kind of than mullite, aluminium oxide and carbonization
The high refractory material of silicon refractoriness.Thermal shock resistance is big simultaneously, and rapid heat cycle is repeated at 1500 DEG C, does not generate rupture.
And it does not react with iron group metal.C-BN is in addition to excellent wear-resisting property, and heat resistance is also extremely excellent, refractory material
And antioxidant, especially suitable resist melt metal erosion, the use of heat enhancing additive, heat safe insulating materials.
Glass powder is formed as unformed hard particles after high speed crushes, and is a kind of easy sanding anti-zoned high transparency powder,
With good affinity, and have stronger steric hindrance ability, can admirably be scattered in coating, grain size is small, good dispersion,
Transparency is high, result of prevention is good.Contain certain PbO, SiO in glass raw material2、TiO2, it is doped in frit for porcelain enamel, through high temperature
Solid phase reaction forms the enamel glass isotropic body of disordered structure, can increase the richness of enamel layer.Chemical property is stablized, acidproof
Caustic corrosion, heat erosion effect are good.
Further, the present invention provides a kind of preparation method of heat and corrosion resistant enamel coating, include the following steps：
A, metal base surface enamel spraying ground-coat enamel material slurry after treatment forms the slurry coating of 0.3~0.5mm,
Dry 30~45min, is transferred to 900~950 DEG C of 12~15min of enamel firing of electric furnace at 130~150 DEG C, cooling, and base enamel is made
Layer；
B, the base enamel layer surface enamel spraying glaze material slurry made from step a forms the slurry of 0.2~0.4mm
Coating at 130~150 DEG C after dry 30~45min, is transferred to 10~12min of enamel firing at a temperature of 850~900 DEG C of electric furnace, cold
But, heat and corrosion resistant enamel coating is made.
Ground-coat enamel in the present invention sprays 0.3~0.5mm, can improve the adherence effect of ground-coat enamel and metallic matrix, hot rotten
Protection metallic matrix is more conducive under environment；Glaze material sprays 0.2~0.4mm, glaze material it is unsuitable it is spray coated after, if overglaze sprays
It is blocked up, in addition the entire enamel coating of the thickness of ground-coat enamel will be more than 0.8~0.9mm, it is easy de- porcelain, cracking under high temperature environment.
In the present invention, in addition to special instruction, the number occurred refers both to parts by weight.
Explanation will be further explained to the specific implementation mode of the present invention by embodiment below, but not indicated that this
The protection domain of invention is limited in range described in embodiment.
In embodiment and comparative example, the raw material is ordinary commercial products.
Embodiment 1 prepares enamel coating with the method for the present invention
It counts in parts by weight, SiO230 parts, NaB4O7.4H244 parts of O, NaNO316 parts, Na2CO315 parts, Li2CO3 3.5
Part, 10 parts of fluorite, Na2SiF62.5 parts, Na3AlF66 parts, Na4P2O7.10H23.5 parts of O, Co (NO3)28 parts and Ni (NO3)23
Part after mixing, is heated to melting 2h at 1300 DEG C, quench in cold water broken, and in 105 DEG C of dry 20min, base enamel material is made.
By 100 parts of ground-coat enamel material, 16 parts of clay, 3 parts of bentonite, 1.5 parts of mixing of magnesium sulfate are crushed to granularity -200, add 20 parts of mixing of water
Uniformly, base enamel slurry is made.
By glassed steel BTC245R specimen surface blasting treatments, decontamination is cleaned, after dry, in its surface spraying base enamel
Expect slurry, 0.3~0.5mm of thickness, after dry, base enamel layer is made in 900 DEG C of enamel firing 12min；
By mass parts：SiO240 parts, NaB4O7.4H228 parts of O, Na2CO38.5 parts, Li2CO33.5 parts, 0.5 part of NiO,
Na3AlF65.5 parts, Na2CrO43.5 parts, NaSbO31.5 parts, SrSO41 part and Na2MO31200 DEG C of meltings after 0.5 part of mixing
3h, water quenching, dry cover-coat enamel material.By 100 parts of cover-coat enamel material, 11 parts of clay, 6.5 parts of bentonite, 4.5 parts of zircon English,
C-BN25 parts, 1.5 parts of LiF is crushed to -200 mesh >=98% of granularity, and 25 parts of 400 mesh glass powder, 22 parts of water is added to be uniformly mixed
Cover-coat enamel material slurry is sprayed at base enamel 0.2~0.4mm of layer, and after dry, heat and corrosion resistant is made in 900 DEG C of enamel firing 12min
Enamel coating.
Enamel coating coats 75wt%Na on face2SO4+ 25wt%NaCl corrosive medium salinities follow for 850 DEG C in tube furnace
Epoxidation heat erosion 100 times.Its enamel coating glaze is observed without peeling, weightening quality is 0.081mg/cm after weighing heat erosion2。
Embodiment 2 prepares enamel coating with the method for the present invention
It counts in parts by weight, SiO230 parts, NaB4O7.4H244 parts of O, NaNO316 parts, Na2CO315 parts, Li2CO3 3.5
Part, 10 parts of fluorite, Na2SiF62.5 parts, Na3AlF66 parts, Na4P2O7.10H23.5 parts of O, Co (NO3)28 parts and Ni (NO3)23
Part after mixing, is heated to melting 2h at 1300 DEG C, quench in cold water broken, and in 105 DEG C of dry 20min, base enamel material is made.
By 100 parts of ground-coat enamel material, 16 parts of clay, 3 parts of bentonite, 1.5 parts of mixing of magnesium sulfate are crushed to granularity -200, add 20 parts of mixing of water
Uniformly, base enamel slurry is made.
By mild steel Q235 specimen surface blasting treatments, decontamination is cleaned, after dry, in its surface spraying in the enamel bottom
Glaze slurry, 0.3~0.5mm of thickness, after dry, base enamel layer is made in 900 DEG C of enamel firing 12min；
Prepare cover-coat enamel material：By mass parts：SiO240 parts, NaB4O7.4H228 parts of O, Na2CO38.5 parts, Li2CO3
3.5 parts, 0.5 part of NiO, Na3AlF65.5 parts, NaSbO31.5 parts, SrSO41200 DEG C of melting 3h, water quenching are done after 1 part of mixing
It is dry to obtain enamel block.By 100 parts of enamel block, 11 parts of clay, 6.5 parts of bentonite, 4.5 parts of zircon English, 25 parts of C-BN, LiF 1.5
Part, it is crushed to -200 mesh >=98% of granularity, adds 25 parts of 400 mesh glass powder, 22 parts of water uniformly mixed that porcelain facing glaze slurry is sprayed at
Base enamel 0.2~0.4mm of level, after dry, heat and corrosion resistant enamel coating is made in 900 DEG C of enamel firing 12min.
Enamel coating coats 75wt%Na on face2SO4+ 25wt%NaCl corrosive medium salinities follow for 850 DEG C in tube furnace
Epoxidation heat erosion 100 times observes its enamel coating glaze without peeling, and heat erosion phenomenon, glaze out-of-flatness occur for surface.It is black
Grey, weightening quality is 0.45mg/cm after weighing heat erosion2。
Embodiment 3 prepares enamel coating with the method for the present invention
It counts in parts by weight, SiO230 parts, NaB4O7.4H244 parts of O, NaNO316 parts, Na2CO315 parts, Li2CO3 3.5
Part, 10 parts of fluorite, Na2SiF62.5 parts, Na3AlF66 parts, Na4P2O7.10H23.5 parts of O, Co (NO3)28 parts and Ni (NO3)23
Part after mixing, is heated to melting 2h at 1300 DEG C, quench in cold water broken, and in 105 DEG C of dry 20min, base enamel material is made.
By 100 parts of ground-coat enamel material, 16 parts of clay, 3 parts of bentonite, 1.5 parts of mixing of magnesium sulfate are crushed to granularity -200, add 20 parts of mixing of water
Uniformly, base enamel slurry is made.
By cold-rolled carbon steel SPCC specimen surface blasting treatments, decontamination is cleaned, after dry, in its surface spraying in the enamel
Ground-coat enamel slurry, 0.3~0.5mm of thickness, after dry, base enamel layer is made in 900 DEG C of enamel firing 12min.
Prepare cover-coat enamel material：By mass parts：SiO242 parts, NaB4O7.4H228 parts of O, Na2CO38.5 parts, Li2CO3 5
Part, 1 part of NiO, Na3AlF65.5 parts, Na2CrO44 parts, NaSbO31.5 parts, SrSO41 part and Na2MO3After 0.5 part of mixing
1200 DEG C of melting 3h, water quenching, dry enamel block.By 100 parts of enamel block, 11 parts of clay, 6.5 parts of bentonite, 5 parts of zircon English,
C-BN15 parts, 1.5 parts of LiF is crushed to -200 mesh >=98% of granularity, and 10 parts of 400 mesh glass powder, 22 parts of water is added to be uniformly mixed
Porcelain facing glaze slurry is sprayed at base enamel 0.2~0.4mm of level, and after dry, heat and corrosion resistant enamel is made in 900 DEG C of enamel firing 12min
Coating.
Enamel coating coats 75wt%Na on face2SO4+ 25wt%NaCl corrosive medium salinities follow for 850 DEG C in tube furnace
Epoxidation heat erosion 100 times observes its enamel coating glaze without peeling phenomenon, but ceramic glaze surface out-of-flatness, and it is logical sulfidation corrosion occur
Road, obviously increase weight 3.21mg/cm after weighing heat erosion2。
Embodiment 4 prepares enamel coating with the method for the present invention
It counts in parts by weight, SiO230 parts, NaB4O7.4H244 parts of O, NaNO316 parts, Na2CO315 parts, Li2CO3 3.5
Part, 10 parts of fluorite, Na2SiF62.5 parts, Na3AlF66 parts, Na4P2O7.10H23.5 parts of O, Co (NO3)28 parts and Ni (NO3)23
Part after mixing, is heated to melting 2h at 1300 DEG C, quench in cold water broken, and in 105 DEG C of dry 20min, base enamel material is made.
By 100 parts of ground-coat enamel material, 16 parts of clay, 3 parts of bentonite, 1.5 parts of mixing of magnesium sulfate are crushed to granularity -200, add 20 parts of mixing of water
Uniformly, base enamel slurry is made.
By glassed steel BTC245R specimen surface blasting treatments, cleans decontamination and warded off in described in its surface spraying after dry
Porcelain ground-coat enamel slurry, 0.3~0.5mm of thickness, after dry, base enamel layer is made in 900 DEG C of enamel firing 12min.
Prepare cover-coat enamel material：By mass parts：SiO242 parts, NaB4O7.4H226 parts of O, Li2CO33.5 parts, NiO 1
Part, Na2CrO43.5 parts, NaSbO31 part, SrSO41200 DEG C of melting 3h, water quenching, dry enamel block after 1 part of mixing.By porcelain
100 parts of glaze block, 11 parts of clay, 6.5 parts of bentonite, 4 parts of zircon English, 1.5 parts of 25 parts of C-BN, LiF are crushed to -200 mesh of granularity
>=98%, add 25 parts of 400 mesh glass powder, 22 parts of water be uniformly mixed porcelain facing glaze slurry be sprayed at base enamel level 0.2~
0.4mm, after dry, heat and corrosion resistant enamel coating is made in 900 DEG C of enamel firing 12min.
Enamel coating coats 75wt%Na on face2SO4+ 25wt%NaCl corrosive medium salinities follow for 850 DEG C in tube furnace
There is not the phenomenon that interior vulcanization or internal oxidition without peeling phenomenon in epoxidation heat erosion 100 times, observation enamel coating glaze,
But there is a small amount of crackle in ceramic glaze surface out-of-flatness, and weightening quality is 0.64mg/cm after weighing heat erosion2。
Comparative example 1 does not use ground-coat enamel material of the present invention to prepare enamel coating
It counts in parts by weight, SiO230 parts, NaNO316 parts, Na2CO315 parts, Li2CO33.5 parts, 10 parts of fluorite,
Na2SiF62.5 parts, Na3AlF66 parts, Co (NO3)28 parts and Ni (NO3)23 parts after mixing, is heated to melting at 1300 DEG C
2h quenches in cold water broken, and in 105 DEG C of dry 20min, base enamel material is made.By 100 parts of ground-coat enamel material, 16 parts of clay, bentonite 3
Part, 1.5 parts of mixing of magnesium sulfate are crushed to granularity -200, add 20 parts of water to be uniformly mixed, base enamel slurry is made.
By glassed steel BTC245R specimen surface blasting treatments, cleans decontamination and warded off in described in its surface spraying after dry
Porcelain ground-coat enamel slurry, 0.3~0.5mm of thickness, after dry, base enamel layer is made in 900 DEG C of enamel firing 12min；
Prepare cover-coat enamel material：By mass parts：SiO240 parts, NaB4O7.4H228 parts of O, Na2CO38.5 parts, Li2CO3
3.5 parts, 0.5 part of NiO, Na3AlF65.5 parts, Na2CrO43.5 parts, NaSbO31.5 parts, SrSO41 part and Na2MO30.5 part
1200 DEG C of melting 3h, water quenching, dry enamel block after mixing.By 100 parts of enamel block, 11 parts of clay, 6.5 parts of bentonite, LiF
1.5 parts, it is crushed to -200 mesh >=98% of granularity, adds 22 parts of water uniformly mixed that porcelain facing glaze slurry is sprayed at base enamel level
0.2~0.4mm, after dry, heat and corrosion resistant enamel coating is made in 900 DEG C of enamel firing 12min.
Enamel coating coats 75wt%Na on face2SO4+ 25wt%NaCl corrosive medium salinities follow for 850 DEG C in tube furnace
Enamel coating glaze situation is observed in epoxidation heat erosion 100 times.Ceramic glaze surface is in loose shape hole, is in black gray expandable, enamel coating glaze
Corrode completely in face.
Comparative example 2 does not use glaze material of the present invention to prepare enamel coating
It counts in parts by weight, SiO230 parts, NaB4O7.4H244 parts of O, NaNO316 parts, Na2CO315 parts, Li2CO3 3.5
Part, 10 parts of fluorite, Na2SiF62.5 parts, Na3AlF66 parts, Na4P2O7.10H23.5 parts of O, Co (NO3)28 parts and Ni (NO3)23
Part after mixing, is heated to melting 2h at 1300 DEG C, quench in cold water broken, and in 105 DEG C of dry 20min, base enamel material is made.
By 100 parts of ground-coat enamel material, 16 parts of clay, 3 parts of bentonite, 1.5 parts of mixing of magnesium sulfate are crushed to granularity -200, add 20 parts of mixing of water
Uniformly, base enamel slurry is made.
By glassed steel BTC245R specimen surface blasting treatments, cleans decontamination and warded off in described in its surface spraying after dry
Porcelain ground-coat enamel slurry, 0.3~0.5mm of thickness, after dry, base enamel layer is made in 900 DEG C of enamel firing 12min；
Prepare cover-coat enamel material：By mass parts：SiO238 parts, NaB4O7.4H214 parts of O, Na2CO38.5 parts, Li2CO3
3.5 parts, 0.5 part of NiO, Na3AlF66.5 parts, Na2CrO43.5 parts, NaSbO31.5 parts, SrSO41200 DEG C after 1 part of mixing
Melt 3h, water quenching, dry enamel block.By 100 parts of enamel block, 11 parts of clay, 6.5 parts of bentonite is crushed to -200 mesh of granularity
>=98%, add 22 parts of water be uniformly mixed porcelain facing glaze slurry is sprayed at base enamel 0.2~0.4mm of level, after dry, 900 DEG C
Heat and corrosion resistant enamel coating is made in enamel firing 12min.
Enamel coating coats 75wt%Na on face2SO4+ 25wt%NaCl corrosive medium salinities follow for 850 DEG C in tube furnace
Enamel coating glaze situation is observed in epoxidation heat erosion 100 times.Heat erosion phenomenon occurs for ceramic glaze surface, and ceramic glaze surface out-of-flatness occurs
There is the phenomenon that a small amount of interior vulcanization and internal oxidition in a small amount of crackle, enamel inside, and weightening quality is after weighing heat erosion
11.56mg/cm2。
It can be seen that by embodiment and comparative example result：Base enamel material and cover-coat enamel material cooperation using the present invention makes
With enamel coating and the metallic matrix of preparation are firmly combined with, the ceramic glaze surface structural integrity in heat erosion environment, are not gone out inside enamel
The phenomenon that existing interior vulcanization and internal oxidition, heat erosion weightening quality is less, shows there is better heat-and corrosion-resistant performance.
Claims (10)
1. base enamel material, which is characterized in that composition includes：It counts in parts by weight, SiO230~33 parts, NaB4O7.4H2O 44
~48 parts, NaNO316~18 parts, Na2CO313~15 parts, Li2CO31.5~3.5 parts, 8~11 parts of fluorite, Na2SiF61~3
Part, Na3AlF66~8 parts, Na4P2O7.10H23~5 parts of O, Co (NO3)26~8 parts and Ni (NO3)22~4 parts.
2. the preparation method of base enamel material described in claim 1, which is characterized in that include the following steps：Claim by weight
After taking raw material mixing, be heated to melting 2~3h at 1300~1350 DEG C, be transferred in cold water quench it is broken, in 100~130 DEG C dry 20
Base enamel material is made in~30min.
3. base enamel material slurry, it is characterised in that：By 100 parts of ground-coat enamel material described in claim 1,15~19 parts of clay is swollen
2~3 parts of profit soil is crushed to -200 mesh >=98% of granularity after the mixing of 1~2 part of magnesium sulfate, add 20~22 parts of water be uniformly mixed and
At.
4. cover-coat enamel material, which is characterized in that composition includes：It counts in parts by weight, SiO235~42 parts, NaB4O7.4H2O 26
~28 parts, Na2CO38.5~10 parts, Li2CO33~5 parts, 0.5~1 part of NiO, Na3AlF65~7 parts, Na2CrO43.5~4
Part, NaSbO31~2 part, SrSO41~2 part and Na2MO30.5~1 part.
5. the preparation method of the cover-coat enamel material described in claim 4, which is characterized in that include the following steps：Claim by weight
After taking raw material mixing, be heated to melting 2~3h at 1200~1250 DEG C, be transferred in cold water quench it is broken, in 100~130 DEG C dry 20
Cover-coat enamel material is made in~30min.
6. cover-coat enamel material slurry, it is characterised in that：By 100 parts of cover-coat enamel material described in claim 4, clay 11~13
Part, 5~7 parts of bentonite, 4~5 parts of zircon English, 1~2 part of 25~30 parts of C-BN, LiF mixing, be crushed to -200 mesh of granularity >=
98%, 25~30 parts of glass powder is added, 22~25 parts of water, which is uniformly mixed, to be formed.
7. cover-coat enamel material slurry according to claim 6, it is characterised in that：The zircon English is ZrO2Content>65%
Zircon English.
8. the preparation method of heat and corrosion resistant enamel coating, which is characterized in that include the following steps：
A, the base enamel material slurry described in metal base surface spraying claim 3 after treatment, forms 0.3~0.5mm
Slurry coating, dry 30~45min, is transferred to 900~950 DEG C of 12~15min of enamel firing of electric furnace at 130~150 DEG C, cooling,
Base enamel layer is made；
B, the cover-coat enamel material slurry described in the base enamel layer surface spraying claim 6 made from step a, formation 0.2~
The slurry coating of 0.4mm is transferred to enamel firing 10 at a temperature of 850~900 DEG C of electric furnace at 130~150 DEG C after dry 30~45min
~12min, it is cooling, heat and corrosion resistant enamel coating is made.
9. the preparation method of heat and corrosion resistant enamel coating according to claim 8, it is characterised in that：The metallic matrix
Including at least one of mild steel Q235, glassed steel BTC245R or cold-rolled carbon steel SPCC.
10. the heat and corrosion resistant enamel coating that claim 8 or 9 is prepared.
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| CN201810359870.6A CN108516685A (en) | 2018-04-20 | 2018-04-20 | Heat and corrosion resistant enamel coating and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437570A (en) * | 2018-12-28 | 2019-03-08 | 四会市金家乐五金制品有限公司 | A kind of enamel composite material and its preparation method |
| CN109705729A (en) * | 2018-12-21 | 2019-05-03 | 北京隆源纳欣科技有限公司 | A kind of organic-inorganic modified, high temperature resistant corrosion-resistant abrasion coating |
| CN110615615A (en) * | 2019-09-09 | 2019-12-27 | 广东生活环境无害化处理中心有限公司 | High and low temperature corrosion resistant enamel material, preparation method and application thereof, and high temperature boiling rotary grate furnace device |
| CN110682052A (en) * | 2019-08-29 | 2020-01-14 | 嘉兴巨匠防护设备有限公司 | Processing technology of civil air defense door frame |
| CN111253839A (en) * | 2020-03-05 | 2020-06-09 | 四川智溢实业有限公司 | Snowfield camouflage net white coating and preparation method thereof |
| CN111140182B (en) * | 2019-12-30 | 2021-08-17 | 常州市昊天管道成套有限公司 | Continuous velocity pipe column and manufacturing process thereof |
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| CN105256313A (en) * | 2015-09-25 | 2016-01-20 | 河南和福来金属有限公司 | Enamelling sheet steel fireplace and manufacturing method thereof |
| CN105399328A (en) * | 2015-11-20 | 2016-03-16 | 平顶山市圣康炊具有限公司 | High-strength enamel pan and production technology thereof |
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| US20020144755A1 (en) * | 2000-06-23 | 2002-10-10 | Hidekuni Murakami | Steel sheet for porcelain enamel excellent in forming property, aging property and enameling characteristics and method for porducing the same |
| CN105256313A (en) * | 2015-09-25 | 2016-01-20 | 河南和福来金属有限公司 | Enamelling sheet steel fireplace and manufacturing method thereof |
| CN105399328A (en) * | 2015-11-20 | 2016-03-16 | 平顶山市圣康炊具有限公司 | High-strength enamel pan and production technology thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109705729A (en) * | 2018-12-21 | 2019-05-03 | 北京隆源纳欣科技有限公司 | A kind of organic-inorganic modified, high temperature resistant corrosion-resistant abrasion coating |
| CN109437570A (en) * | 2018-12-28 | 2019-03-08 | 四会市金家乐五金制品有限公司 | A kind of enamel composite material and its preparation method |
| CN110682052A (en) * | 2019-08-29 | 2020-01-14 | 嘉兴巨匠防护设备有限公司 | Processing technology of civil air defense door frame |
| CN110615615A (en) * | 2019-09-09 | 2019-12-27 | 广东生活环境无害化处理中心有限公司 | High and low temperature corrosion resistant enamel material, preparation method and application thereof, and high temperature boiling rotary grate furnace device |
| CN110615615B (en) * | 2019-09-09 | 2022-04-08 | 广东生活环境无害化处理中心有限公司 | High and low temperature corrosion resistant enamel material, preparation method and application thereof, and high temperature boiling rotary grate furnace device |
| CN111140182B (en) * | 2019-12-30 | 2021-08-17 | 常州市昊天管道成套有限公司 | Continuous velocity pipe column and manufacturing process thereof |
| CN111253839A (en) * | 2020-03-05 | 2020-06-09 | 四川智溢实业有限公司 | Snowfield camouflage net white coating and preparation method thereof |
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