CN105694551A - Anticorrosion insulating nano composite ceramic coating for iron-based material and preparation method thereof - Google Patents
Anticorrosion insulating nano composite ceramic coating for iron-based material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an anticorrosion insulating nano composite ceramic coating for an iron-based material and a preparation method thereof. This coating comprises a basic solution, a filler and an aid, wherein the basic solution comprises a high-purity silicon-aluminum-zirconium composite ceramic nano saturated suspension, a high-purity yttrium-cerium composite ceramic nano saturated suspension and a high-expansion glass composite nano saturated suspension. The coating is made from the inorganic high-temperature-resistant anticorrosion ceramic material, microscopic joint interface of solid content particles of the nano composite ceramic coating is modified by a special process in connection with the characteristics of the nano material, the nano composite ceramic coating is macroscopically imparted better surface high-temperature wetting performance and mutual jointing performance with the iron-based material, expansion coefficients of the nano composite ceramic coating and iron-based material are effectively adjusted and matched through the introduction of the high-expansion glass nano suspension particles, and a coating layer formed of the nano composite ceramic coating has better high-temperature thermal shock resistance and better anticorrosion performance, the process is simple, the performances are stable, and the cost is about 80% less than that of a plasma sprayed ceramic coating layer.
Description
Technical field
The present invention relates to a kind of coating, belong to nano composite ceramic technical field, refer in particular to a kind of anti-corrosion insulation nano composite ceramic coating suitable in iron and preparation method thereof。
Background technology
Iron, is exactly briefly ferrum element (Fe) metal alloy that accounts for main component, and it can add various metal or nonmetal to meet various needs, it is possible to conductive and heat-conductive, uses extremely wide, and price is also cheaper。
High temperature resistant (300 DEG C-1300 DEG C, concrete heatproof depends on heatproof and the utilization working condition requirement of each model iron) anti-thermal shock anti-corrosion insulation is iron important performance needed for the field high-temperature components such as electronic apparatus, chemical industry metallurgical, Aero-Space, high-end equipment manufacturing。As shown in Figure 1, the current main method obtaining this performance is by plasma torch spraying ceramic coat, but this technique cannot be constructed for complex part at present, and it is with high costs, it is not easy volume production, it is exactly that existing coating is piled up in iron 1 surface porosity on the other hand, is combined with iron 1 loose, it is difficult to formation is stablized a large amount of mesophase spherule and combined closely。Market also has the silicone based high-temperature insulating paint of a small amount of import, due to the existence of organosilicon, high temperature resistant limited, easy aging peeling, dielectric strength is also uneven, also attaches harsh construction requirement simultaneously, otherwise arises that different types of defect and problem after high temperature。
Summary of the invention
It is an object of the invention to overcome shortcoming of the prior art with not enough, a kind of anti-corrosion insulation nano composite ceramic coating suitable in iron is provided, this coating selection is inorganic, high temperature resistant, corrosion resistant ceramic material, characteristic in conjunction with nano material, solid containing intergranular microcosmic combination interface by special process modified Nano composite ceramics coating, allow nano composite ceramic coating macroscopically have better in iron surface high-temp wettability and the performance that be combined with each other, coordinate the introducing of highly expanded glass nano suspension particle, effectively regulate, the coefficient of expansion of coupling nano composite ceramic coating and iron, the coating that this nano composite ceramic coating is formed is made to have better high temperature anti-thermal shock, erosion-resisting performance, technique is simple, stable performance, cost relatively plasma spraying ceramic coat is low by about 80%。
Another object of the present invention is to the preparation method that the above-mentioned anti-corrosion insulation nano composite ceramic coating suitable in iron is provided。
In order to realize first purpose, present invention techniques below scheme realizes:
A kind of anti-corrosion insulation nano composite ceramic coating suitable in iron, it includes basal liquid, filler and auxiliary agent, wherein:
Described basal liquid includes high-purity sial saturated suspension of zirconium composite ceramics nanometer, the saturated suspension of high-purity yttrium cerium composite ceramics nanometer and the saturated suspension of highly expanded glass composite Nano, wherein, this high-purity sial saturated suspension of zirconium composite ceramics nanometer includes the following each component accounting for coating weight percentage ratio: silicon oxide 2～36%, aluminium oxide 2～17%, zirconium oxide 2～12%；This high-purity yttrium saturated suspension of cerium composite ceramics nanometer includes the following each component accounting for coating weight percentage ratio: yittrium oxide 0～5%, cerium oxide 1～9%；This highly expanded saturated suspension of glass composite Nano includes the following each component accounting for coating weight percentage ratio: highly expanded glass dust 3～21%；
Described filler includes the following each component accounting for coating weight percentage ratio: carborundum 5～35%, CNT 0～8%；
Described auxiliary agent includes the following each component accounting for coating weight percentage ratio: antirust agent 0.5～4%, levelling agent 0.5～2%, defoamer 0.2～3%。
Further, described silicon oxide, aluminium oxide, zirconic purity are higher than 99.5%, and primary particle size D50 is 48～52 nanometers。
Further, described yittrium oxide, cerium oxide primary particle size D50 be 48～52 nanometers。
Further, the primary particle size D50 of described highly expanded glass dust is 98～102 nanometers。
Further, the purity of described carborundum is higher than 96%, and the purity of CNT is higher than 99%。
In order to realize second purpose, present invention techniques below scheme realizes:
A kind of preparation method of the anti-corrosion insulation nano composite ceramic coating suitable in iron, it includes following steps:
S1, prepare basal liquid: by compound, stable suspersion, ripening according to a certain ratio after silica alumina zirconium oxide respectively nano-scale dispersion, prepare high-purity sial saturated suspension of zirconium composite ceramics nanometer after surface modification；By compound, stable suspersion, ripening according to a certain ratio after yittrium oxide cerium oxide respectively nano-scale dispersion, prepare the high-purity yttrium saturated suspension of cerium composite ceramics nanometer after surface modification；The highly expanded saturated suspension of glass composite Nano will be prepared after highly expanded glass dust nano-scale dispersion, stable suspersion, ripening, surface modification；By standby for the basal liquid of nano composite ceramic coating prepared after above-mentioned three kinds of suspension compounds, stable suspersion, ripenings；
S2, prepare filler: the filler that micron order carborundum and CNT mix, prepare after surface modification nano composite ceramic coating according to a certain ratio is standby；
Filler mixing dispersion prepared by S3, basal liquid S1 step prepared and S2 step, adds the auxiliary agent of certain proportioning, can be prepared by finished product single-component nanometer composite ceramics coating after dispersion ripening。
Further, described silicon oxide, aluminium oxide, zirconic purity are higher than 99.5%, and primary particle size D50 is 48～52 nanometers；Described yittrium oxide, cerium oxide primary particle size D50 be 48～52 nanometers；The primary particle size D50 of described highly expanded glass dust is 98～102 nanometers；The purity of described carborundum is higher than 96%, and the purity of CNT is higher than 99%。
Compared with prior art, it has the beneficial effect that the present invention
The high-temperature coatings being used for iron surface has been carried out formula and process modification (formula composition material corrosion-and high-temp-resistant by the present invention, nano composite ceramic coating is solid to be refined containing component particle grain diameter nano, the storeroom interface optimization of microcosmic and moistening, the coating of reinforced nano composite ceramics coating making is obviously improved with bond strength and the strength of coating on iron surface), the coating that nano composite ceramic coating after improvement makes can be good adaptation iron surface, it is achieved the performance of high temperature anti-thermal shock anti-corrosion insulation；Particularly as follows:
1, making iron can be applicable to high temperature (300 DEG C-1300 DEG C, concrete heatproof depends on heatproof and the utilization working condition requirement of each model iron) operating mode for a long time, iron surface realizes electric insulation and high-temperature anticorrosion function
2, making iron longer service life under equal high temperature (300 DEG C-1300 DEG C, concrete heatproof depends on heatproof and the utilization working condition requirement of each model iron) working condition, some operating modes even can increase by 10 times of life-spans used above；
3, extend and widened the high temperature (300 DEG C-1300 DEG C of iron, concrete heatproof depends on heatproof and the utilization working condition requirement of each model iron) use, utilization particularly in electric heating device aspect, simultaneously need to the dual property of high temperature and insulation, as electric heating tube, electromagnetic oven, Electric radiant Heating Film are required for high-temperature insulation；
4, this nano composite ceramic coating is one-component, can directly use, stable performance, simple to operate, saves coating。
In order to enable the apparent understanding present invention, illustrate to set forth the specific embodiment of the present invention below with reference to accompanying drawing。
Accompanying drawing explanation
Fig. 1 is the coating state schematic diagram of prior art coating。
Fig. 2 is the coating state schematic diagram of coating of the present invention。
Detailed description of the invention
Anti-corrosion insulation nano composite ceramic coating suitable in iron of the present invention, it includes basal liquid, filler and auxiliary agent, wherein: described basal liquid includes high-purity sial saturated suspension of zirconium composite ceramics nanometer, the saturated suspension of high-purity yttrium cerium composite ceramics nanometer and the saturated suspension of highly expanded glass composite Nano, wherein, this high-purity sial saturated suspension of zirconium composite ceramics nanometer includes the following each component accounting for coating weight percentage ratio: silicon oxide 2～36%, aluminium oxide 2～17%, zirconium oxide 2～12%；This high-purity yttrium saturated suspension of cerium composite ceramics nanometer includes the following each component accounting for coating weight percentage ratio: yittrium oxide 0～5%, cerium oxide 1～9%；This highly expanded saturated suspension of glass composite Nano includes the following each component accounting for coating weight percentage ratio: highly expanded glass dust 3～21%；Described filler includes the following each component accounting for coating weight percentage ratio: carborundum 5～35%, CNT 0～8%；Described auxiliary agent includes the following each component accounting for coating weight percentage ratio: antirust agent 0.5～4%, levelling agent 0.5～2%, defoamer 0.2～3%。
Further, described silicon oxide, aluminium oxide, zirconic purity are higher than 99.5%, and primary particle size D50 is 48～52 nanometers；Described yittrium oxide, cerium oxide primary particle size D50 be 48～52 nanometers；The primary particle size D50 of described highly expanded glass dust is 98～102 nanometers；The purity of described carborundum is higher than 96%, and the purity of CNT is higher than 99%。
The preparation method of the above-mentioned anti-corrosion insulation nano composite ceramic coating suitable in iron, it includes following steps: S1, prepare basal liquid: by compound, stable suspersion, ripening according to a certain ratio after silica alumina zirconium oxide respectively nano-scale dispersion, prepare high-purity sial saturated suspension of zirconium composite ceramics nanometer after surface modification；By compound, stable suspersion, ripening according to a certain ratio after yittrium oxide cerium oxide respectively nano-scale dispersion, prepare the high-purity yttrium saturated suspension of cerium composite ceramics nanometer after surface modification；The highly expanded saturated suspension of glass composite Nano will be prepared after highly expanded glass dust nano-scale dispersion, stable suspersion, ripening, surface modification；By standby for the basal liquid of nano composite ceramic coating prepared after above-mentioned three kinds of suspension compounds, stable suspersion, ripenings；S2, prepare filler: the filler that micron order carborundum and CNT mix, prepare after surface modification nano composite ceramic coating according to a certain ratio is standby；Filler mixing dispersion prepared by S3, basal liquid S1 step prepared and S2 step, adds the auxiliary agent of certain proportioning, can be prepared by finished product single-component nanometer composite ceramics coating after dispersion ripening。
As shown in Figure 2, this paint coatings by nano-particle to the cladding on micron particle and iron 1 surface and infiltration, coating is tightly packed, it is tightly combined with iron 1, form substantial amounts of mesophase spherule between iron 1 and coating to combine closely, interting of carbon nano-tube fibre 2 is staggered, effectively disperses all kinds of stress, it is provided that coating high-temp adaptability and thermal shock resistance。
In the technical program, the coating that nano composite ceramic coating makes as skeleton by resistant to elevated temperatures crystal and is mutually inlayed and is formed stabilization of bony shelf structure, suitable glassy phase being partially filled with as skeleton, owing to glassy phase has the higher coefficient of expansion and then the expansion character that formation and iron match；The carborundum introduced in nano composite ceramic coating and CNT, the physical property of both materials own is that conductive high-temperature can aoxidize, but by surface modification and sial zirconium, yittrium oxide cerium oxide, highly expanded glass nanoparticles cladding, ultimately formed nonconducting high temperature resistant, anti-thermal shock, improved the stabilizing factor of the mutual wettability of storeroom；Consolidating containing material granule contained by nano composite ceramic coating, realize the stable ceramic of compact coating that micro-nano combines, crystal phase is combined with glassy phase, effectively having intercepted the corrosion to iron under worst hot case, the insulating properties of ceramic material in turn ensure that the insulating properties of coating simultaneously。
The invention is not limited in above-mentioned detailed description of the invention, if to the various changes of the present invention and modification without departing from the spirit and scope of the present invention, if these change within claim and the equivalent technologies scope belonging to the present invention with modification, then the present invention is also intended to comprise these change and modification。
Claims (7)
1. the anti-corrosion insulation nano composite ceramic coating being applicable to iron, it is characterised in that: include basal liquid, filler and auxiliary agent, wherein:
Described basal liquid includes high-purity sial saturated suspension of zirconium composite ceramics nanometer, the saturated suspension of high-purity yttrium cerium composite ceramics nanometer and the saturated suspension of highly expanded glass composite Nano, wherein, this high-purity sial saturated suspension of zirconium composite ceramics nanometer includes the following each component accounting for coating weight percentage ratio: silicon oxide 2～36%, aluminium oxide 2～17%, zirconium oxide 2～12%；This high-purity yttrium saturated suspension of cerium composite ceramics nanometer includes the following each component accounting for coating weight percentage ratio: yittrium oxide 0～5%, cerium oxide 1～9%；This highly expanded saturated suspension of glass composite Nano includes the following each component accounting for coating weight percentage ratio: highly expanded glass dust 3～21%；
Described filler includes the following each component accounting for coating weight percentage ratio: carborundum 5～35%, CNT 0～8%；
Described auxiliary agent includes the following each component accounting for coating weight percentage ratio: antirust agent 0.5～4%, levelling agent 0.5～2%, defoamer 0.2～3%。
2. a kind of anti-corrosion insulation nano composite ceramic coating suitable in iron according to claim 1, it is characterised in that: described silicon oxide, aluminium oxide, zirconic purity are higher than 99.5%, and primary particle size D50 is 48～52 nanometers。
3. a kind of anti-corrosion insulation nano composite ceramic coating suitable in iron according to claim 1, it is characterised in that: described yittrium oxide, cerium oxide primary particle size D50 be 48～52 nanometers。
4. a kind of anti-corrosion insulation nano composite ceramic coating suitable in iron according to claim 1, it is characterised in that: the primary particle size D50 of described highly expanded glass dust is 98～102 nanometers。
5. a kind of anti-corrosion insulation nano composite ceramic coating suitable in iron according to claim 1, it is characterised in that: the purity of described carborundum is higher than 96%, and the purity of CNT is higher than 99%。
6. the preparation method of a kind of anti-corrosion insulation nano composite ceramic coating suitable in iron as claimed in claim 1, it is characterised in that include following steps:
S1, prepare basal liquid: by compound, stable suspersion, ripening according to a certain ratio after silica alumina zirconium oxide respectively nano-scale dispersion, prepare high-purity sial saturated suspension of zirconium composite ceramics nanometer after surface modification；By compound, stable suspersion, ripening according to a certain ratio after yittrium oxide cerium oxide respectively nano-scale dispersion, prepare the high-purity yttrium saturated suspension of cerium composite ceramics nanometer after surface modification；The highly expanded saturated suspension of glass composite Nano will be prepared after highly expanded glass dust nano-scale dispersion, stable suspersion, ripening, surface modification；By standby for the basal liquid of nano composite ceramic coating prepared after above-mentioned three kinds of suspension compounds, stable suspersion, ripenings；
S2, prepare filler: the filler that micron order carborundum and CNT mix, prepare after surface modification nano composite ceramic coating according to a certain ratio is standby；
Filler mixing dispersion prepared by S3, basal liquid S1 step prepared and S2 step, adds the auxiliary agent of certain proportioning, can be prepared by finished product single-component nanometer composite ceramics coating after dispersion ripening。
7. the preparation method of a kind of anti-corrosion insulation nano composite ceramic coating suitable in iron according to claim 6, it is characterised in that: described silicon oxide, aluminium oxide, zirconic purity are higher than 99.5%, and primary particle size D50 is 48～52 nanometers；Described yittrium oxide, cerium oxide primary particle size D50 be 48～52 nanometers；The primary particle size D50 of described highly expanded glass dust is 98～102 nanometers；The purity of described carborundum is higher than 96%, and the purity of CNT is higher than 99%。
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|---|---|---|---|---|
| CN106587965A (en) * | 2016-12-06 | 2017-04-26 | 武汉钢铁股份有限公司 | Low-temperature sintering high-heat conduction ceramic paint suitable for metal base material and preparation method and application thereof |
| CN109612283A (en) * | 2018-11-26 | 2019-04-12 | 四川陆亨能源科技有限公司 | A kind of ferrosilicon mineral hot furnace waste heat exchange system |
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| CN1530406A (en) * | 2003-03-12 | 2004-09-22 | 中 徐 | Ceramic thermal insulative pigment |
| CN102146563A (en) * | 2011-03-08 | 2011-08-10 | 张昆 | Production process for intelligent temperature adjusting steel rail with laser cladding layer and heat insulation coating |
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| CN106587965A (en) * | 2016-12-06 | 2017-04-26 | 武汉钢铁股份有限公司 | Low-temperature sintering high-heat conduction ceramic paint suitable for metal base material and preparation method and application thereof |
| CN106587965B (en) * | 2016-12-06 | 2019-12-06 | 武汉钢铁有限公司 | low-temperature sintering high-thermal-conductivity ceramic coating suitable for metal substrate and preparation method and application thereof |
| CN109612283A (en) * | 2018-11-26 | 2019-04-12 | 四川陆亨能源科技有限公司 | A kind of ferrosilicon mineral hot furnace waste heat exchange system |
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| CN105694551B (en) | 2018-08-21 |
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