CN102775827A - High-temperature-resistance anti-corrosion coating and application thereof in outer wall of industrial boiler - Google Patents
High-temperature-resistance anti-corrosion coating and application thereof in outer wall of industrial boiler Download PDFInfo
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- CN102775827A CN102775827A CN2012103016271A CN201210301627A CN102775827A CN 102775827 A CN102775827 A CN 102775827A CN 2012103016271 A CN2012103016271 A CN 2012103016271A CN 201210301627 A CN201210301627 A CN 201210301627A CN 102775827 A CN102775827 A CN 102775827A
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Abstract
The invention provides a high-temperature-resistance anti-corrosion coating and application thereof in an outer wall of an industrial boiler. The coating comprises the following components: bauxite, silicon powder, aluminum sesquioxide, a curing agent, a suspending agent and an adhesive. The coating can exert the advantages of matched materials, and has the advantages of durability, strong adhesion, impact resistance, anti-corrosion property and the like. In practical use, the coating needs to be sprayed mechanically layer by layer, and sundries on the surface of an object to be sprayed must be cleaned completely before spraying. With the adoption of the coating material provided by the invention, the anti-corrosion and anti-oxidation problems of the surfaces of the tube wall and the surface of the fireproof lining inside a combustion chamber cavity of a high-temperature vapor boiler can be solved, so the service life is greatly prolonged.
Description
Technical field
The present invention relates to a kind of coated material and application thereof, be specifically related to a kind of high-temperature resistant anti-corrosive coating and the application in the Industrial Boiler outer wall thereof.
Background technology
Boiler inner wall high-temperature resistant coating commonly used in the prior art; Most construction technologies are that artificial brushing forms; Its rete is thinner, and mostly the product of being brushed is water-soluble mixing liquid, because this coating adopts artificial brushing back and the protected object surface affinity is little, the space is bigger between the molecule; Intensity is lower, obscission can occur after the cooling that heats up repeatedly.If but artificial brushing film forming is thick more, it is serious more to ftracture, and it is serious more then to come off, and sticking power is more little; And cracking and be full of cracks are serious, then can cause thermal radiation to be invaded and can not protect the protection object well, do not reach expected effect, do not have good etch-proof effect; And this coatingsurface is rented and is roughly still hung nitre, hangs with a large amount of dirt settlings, destroys this resist when clearing up this dirt settling easily.
How to accomplish that the protected object surface does not weather, refractory lining does not weather and is out of shape to produce and destroys, and is the theme of this field people research always.Though the coating variety of present domestic application is various, does not all systematically address this problem.
Summary of the invention
The shortcoming that is corroded easily to Industrial Boiler inwall in the prior art; The invention provides a kind of high-temperature resistant anti-corrosive coating and the application in the Industrial Boiler outer wall thereof; Said coating can form protective layer at the industrial furnace outer wall, thereby reaches the purpose in the work-ing life that prolongs industrial furnace.
For realizing the foregoing invention purpose, the present invention adopts following technical proposals to be achieved:
A kind of high-temperature resistant anti-corrosive coating, it comprises following component, by mass percentage:
Bauxitic clay 20～30%; Silica flour 5～8%; Al
2O
33～5%; Solidifying agent 1～3%; Tackiness agent 50～60%; Suspension agent 3～5%.
Further improvement to technique scheme: said solidifying agent is a resol.
Further improvement to technique scheme: said tackiness agent is water glass, resol.
Further improvement to technique scheme: said suspension agent is a wilkinite.
The present invention also provides the application of described high-temperature resistant anti-corrosive coating in the Industrial Boiler outer wall.
Further improvement to technique scheme: in 3 layers of said coating of boiler casing spraying.
Further improvement to technique scheme: the first sprayed coating thickness, 0.1～0.2mm; The second sprayed coating thickness, 0.4～0.6mm; The 3rd sprayed coating thickness 0.1～0.2mm.
Further improvement to technique scheme: carried out the construction of second sprayed coating in 2～3 hours in first sprayed coating back of condensing; Carried out the construction of the 3rd sprayed coating in 4～6 hours in second sprayed coating back of condensing.
Compared with prior art; Advantage of the present invention and positively effect are: said coating can be brought into play the advantage of suitable material; Have weather resistance, strong adhesion, shock resistance, wear resistance, anticorrosive, the no dirt settling in surface or advantage such as slight dirt settling is arranged; When concrete the application, require the layering mechanically spraying, must strictly remove the foreign material (like corrosion, sulfide) on thing to be sprayed surface before the spraying; Coated material according to the invention can solve high-temperature steam boiler burning chamber inner tubal wall surface, the surperficial anticorrosion problem of oxidation of refractory lining, improves its work-ing life greatly.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is done further detailed explanation.
Embodiment 1
One, preparation high-temperature resistant anti-corrosive coating according to the invention
High-temperature resistant anti-corrosive coating according to the invention comprises following component: bauxitic clay, silica flour, aluminium sesquioxide, solidifying agent, suspension agent, tackiness agent, said solidifying agent are resol, and said suspension agent is a wilkinite, and said tackiness agent is a water glass.The ratio of various components (mass ratio) is in the present embodiment: bauxitic clay 20%; Silica flour 8%; Al
2O
35%; Resol 2%; Water glass 60%; Wilkinite 5%.Said each component mixed forming mixture, said mixture is through impeller (but also fed batch), 500～1000 rev/mins of rotating speeds, and 1 hour time, stir, make between its molecule to reach affine.Pack into then in the finished container.Said coating can Celsius-20～1500 ℃ not crackle, do not peel off and acid and alkali-resistance.
Two, the application in the Industrial Boiler outer wall
Coating according to the invention is had relatively high expectations to attachment surface, and attachment surface must be clean.In concrete spraying process, with derusting by sandblast technology the metallic surface is processed, after execution national standard: GB8923-88 is the Sa2 level, with spraying equipment the coated material layering is sprayed on the works equably again.
The spraying layering requires:
The first layer: coating thickness 0.1～0.2mm;
The second layer: coating thickness 0.4～0.6mm; Treat that the first layer coating material back of condensing carried out second layer construction in about 2～3 hours.
The 3rd layer: coating thickness 0.1～0.2mm; Treat that the second layer coating material back of condensing carried out tri-level construction in about 4～6 hours.
The present invention is 1mm through the most economical coat-thickness of test of many times proof, and the layering spraying effect is optimum.
Three, the performance of coating according to the invention.
1, peels off experiment and sticking power experiment (GB/T1720-79)
The metallic surface: the metal linear deformation of expanding with heat and contract with cold is fairly obvious, and when the temperature difference sharply changes, the material of two kinds of different coefficients of expansion will produce bigger internal stress, can not be attached to metallic surface fully thereby it is peeled off.Coated material of the present invention is applied on the steel plate, plate size 200 * 300 * 5mm, coat-thickness 1mm, common high alumina brick 230 * 114 * 65mm, the cooling experiment that repeatedly repeats to heat up, its experimental result data such as table 1:
Peeling off and the sticking power experimental result of the said coated material of table 1
| The test specimen group | Temperature-control range | The temperature control time | The cooling condition | Observe phenomena | Sticking power |
| Steel pipe 1 | 10～300℃ | 10min | Be cooled to normal temperature | Lead, flawless | 12N/mm 2 |
| Steel pipe 2 | 10～400℃ | 20min | Be cooled to normal temperature | Lead, flawless | 10N/mm 2 |
| Steel pipe 3 | 10～600℃ | 30min | Be cooled to normal temperature | Lead, flawless | 8.5N/mm 2 |
| Steel pipe 4 | 10～800℃ | 60min | Be cooled to normal temperature | Light grey, flawless | 8.2N/mm 2 |
| Steel pipe 5 | 10～1000℃ | 600min | Be cooled to normal temperature | Bright pink look, tiny crack | 8.1N/mm 2 |
| Steel pipe 6 | 10～1200℃ | 700min | Be cooled to normal temperature | Bright pink look, tiny crack | 6N/mm 2 |
| High aluminum component 7 | 10～1400℃ | 200min | Be cooled to normal temperature | Bright pink look, flawless | 32N/mm 2 |
| High aluminum component 8 | 10～1500℃ | 300min | Be cooled to normal temperature | Bright pink look, flawless | 32N/mm 2 |
| Steel pipe 9 | -20～0℃ | 24h | Be cooled to normal temperature | Bright pink look, flawless | 16N/mm 2 |
| Steel pipe 10 | 800～1000℃ | 1-2h | Be cooled to normal temperature | Bright pink look, flawless | 4N/mm 2 |
Annotate: 1. temperature-rise period is: heat up slowly; Temperature-fall period is: slowly be cooled to normal temperature.
2. the temperature control time is: the residence time that reaches mxm..
3. steel pipe 10 does not eliminate rust, and is used to do contrast.
Through the experimental result of table 1, the sticking power that can find out this coated material and body structure surface is 8N/mm
2More than, and sticking power reaches 5N/mm
2Then can not peel off, the data that experiment obtains are: the maximum wind speed in the boiler is less than 10m/s, and among the present invention to the wind speed of test specimen up to 35-100m/s.And, spend the performance that the tiny crack that is produced does not influence this material at high temperature 1000～1200.This coated material of experiment proof satisfies the structural requirement of using.
Non-metallic refractory surface (high aluminum component): the linear deformation of non-metallic refractory is very little consistent with this invention distortion of materials, and sticking power and bonding force are all fine, satisfy structural requirement fully.
Other nonmetallic surfaces: concrete, clay brick, timber, plastics, rubber, the sticking power of this invention satisfies structural requirement.
2, the wear-resisting experiment of wind speed (GB/T1732-93)
The wear-resisting experimental result of the wind speed of the said coating of table 2
Table 2 experimental result shows: the thing that sinks heavily shows the abrasion loss of test specimen, is illustrated in the environment of trace suspension thing in the last table, to not damage of material surface.
Above embodiment is only in order to explaining technical scheme of the present invention, but not limits it; Although the present invention has been carried out detailed explanation with reference to previous embodiment, for the person of ordinary skill of the art, still can make amendment to the technical scheme that previous embodiment is put down in writing, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of relevant art scheme break away from the spirit and the scope of the present invention's technical scheme required for protection.
Claims (8)
1. a high-temperature resistant anti-corrosive coating is characterized in that it comprises following component, by mass percentage:
Bauxitic clay 20～30%; Silica flour 5～8%; Al
2O
33～5%; Solidifying agent 1～3%; Tackiness agent 50～60%; Suspension agent 3～5%.
2. a kind of high-temperature resistant anti-corrosive coating according to claim 1 is characterized in that: said solidifying agent is a resol.
3. a kind of high-temperature resistant anti-corrosive coating according to claim 2 is characterized in that: said tackiness agent is water glass, resol.
4. a kind of high-temperature resistant anti-corrosive coating according to claim 3 is characterized in that: said suspension agent is a wilkinite.
5. the application of high-temperature resistant anti-corrosive coating according to claim 1 in the Industrial Boiler outer wall.
6. the application of high-temperature resistant anti-corrosive coating according to claim 5 in the Industrial Boiler outer wall is characterized in that: in 3 layers of said coating of boiler casing spraying.
7. the application of high-temperature resistant anti-corrosive coating according to claim 5 in the Industrial Boiler outer wall is characterized in that: the first sprayed coating thickness, 0.1～0.2mm; The second sprayed coating thickness, 0.4～0.6mm; The 3rd sprayed coating thickness 0.1～0.2mm.
8. the application of high-temperature resistant anti-corrosive coating according to claim 7 in the Industrial Boiler outer wall is characterized in that: condense at first sprayed coating and carried out the construction of second sprayed coating in back 2～3 hours; Carried out the construction of the 3rd sprayed coating in 4～6 hours in second sprayed coating back of condensing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210301627.1A CN102775827B (en) | 2012-08-23 | 2012-08-23 | High-temperature-resistance anti-corrosion coating and application thereof in outer wall of industrial boiler |
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|---|---|---|---|
| CN201210301627.1A CN102775827B (en) | 2012-08-23 | 2012-08-23 | High-temperature-resistance anti-corrosion coating and application thereof in outer wall of industrial boiler |
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| CN102775827A true CN102775827A (en) | 2012-11-14 |
| CN102775827B CN102775827B (en) | 2014-09-10 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103382346A (en) * | 2013-07-08 | 2013-11-06 | 吴江市物华五金制品有限公司 | High temperature-resistant water-resistant coating for steam pipelines and preparation method thereof |
| CN104744973A (en) * | 2013-12-31 | 2015-07-01 | 马麟 | High radiant ceramic coating for heating furnace tube as well as preparation method and using method thereof |
| CN104946868A (en) * | 2015-05-28 | 2015-09-30 | 宁国市开源电力耐磨材料有限公司 | High temperature anti-oxidation coating material for cast heat treatment, and preparation method thereof |
| CN105476490A (en) * | 2015-11-18 | 2016-04-13 | 浙江春洲铝业有限公司 | Cookware with high wear resistance and manufacturing method of cookware |
| CN105949929A (en) * | 2016-05-25 | 2016-09-21 | 马鞍山市顺达环保设备有限公司 | Anticorrosion and wear-resistant coating for environmental protection equipment and preparation method of anticorrosion and wear-resistant coating |
| CN107965754A (en) * | 2017-11-11 | 2018-04-27 | 安徽国电能源设备工程有限公司 | A kind of boilers heated electrically outer surface heat means of defence |
| CN108165124A (en) * | 2017-12-06 | 2018-06-15 | 安徽金达节能材料发展有限公司 | A kind of fire resistant anticorrosive aluminium alloy coating |
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| CN1931783A (en) * | 2006-10-12 | 2007-03-21 | 洛阳鹏飞耐火材料有限公司 | Hot cast high temperature wear resistant ceramic material |
| CN101428328A (en) * | 2008-12-06 | 2009-05-13 | 华中科技大学 | Powdery paint for lost foam casting of cast iron |
| CN101497105A (en) * | 2009-03-12 | 2009-08-05 | 深圳市景鼎现代科技有限公司 | Cast form water borne coating and technique for preparing the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1931783A (en) * | 2006-10-12 | 2007-03-21 | 洛阳鹏飞耐火材料有限公司 | Hot cast high temperature wear resistant ceramic material |
| CN101428328A (en) * | 2008-12-06 | 2009-05-13 | 华中科技大学 | Powdery paint for lost foam casting of cast iron |
| CN101497105A (en) * | 2009-03-12 | 2009-08-05 | 深圳市景鼎现代科技有限公司 | Cast form water borne coating and technique for preparing the same |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103382346A (en) * | 2013-07-08 | 2013-11-06 | 吴江市物华五金制品有限公司 | High temperature-resistant water-resistant coating for steam pipelines and preparation method thereof |
| CN103382346B (en) * | 2013-07-08 | 2015-06-17 | 苏州欢颜电气有限公司 | High temperature-resistant water-resistant coating for steam pipelines and preparation method thereof |
| CN104744973A (en) * | 2013-12-31 | 2015-07-01 | 马麟 | High radiant ceramic coating for heating furnace tube as well as preparation method and using method thereof |
| CN104946868A (en) * | 2015-05-28 | 2015-09-30 | 宁国市开源电力耐磨材料有限公司 | High temperature anti-oxidation coating material for cast heat treatment, and preparation method thereof |
| CN105476490A (en) * | 2015-11-18 | 2016-04-13 | 浙江春洲铝业有限公司 | Cookware with high wear resistance and manufacturing method of cookware |
| CN105949929A (en) * | 2016-05-25 | 2016-09-21 | 马鞍山市顺达环保设备有限公司 | Anticorrosion and wear-resistant coating for environmental protection equipment and preparation method of anticorrosion and wear-resistant coating |
| CN107965754A (en) * | 2017-11-11 | 2018-04-27 | 安徽国电能源设备工程有限公司 | A kind of boilers heated electrically outer surface heat means of defence |
| CN107965754B (en) * | 2017-11-11 | 2019-11-08 | 安徽国电能源设备工程有限公司 | A kind of boilers heated electrically outer surface heat means of defence |
| CN108165124A (en) * | 2017-12-06 | 2018-06-15 | 安徽金达节能材料发展有限公司 | A kind of fire resistant anticorrosive aluminium alloy coating |
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| CN102775827B (en) | 2014-09-10 |
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