CN100535069C - Heat resistant paint for iron and steel - Google Patents
Heat resistant paint for iron and steel Download PDFInfo
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- CN100535069C CN100535069C CNB2007100235100A CN200710023510A CN100535069C CN 100535069 C CN100535069 C CN 100535069C CN B2007100235100 A CNB2007100235100 A CN B2007100235100A CN 200710023510 A CN200710023510 A CN 200710023510A CN 100535069 C CN100535069 C CN 100535069C
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Abstract
The heat temperature resistant paint for iron and steel is prepared with ethyl borate 20-25 weight portions, silicone resin 15-25 weight portions, 5-10 wt% concentration polyvinyl butyal solution 5-10 weight portions, aluminum powder 15-20 weight portions, solvent 10-20 weight portions, and dispersant 1-2 weight portions. The present invention has three kinds of matter, including boric oxide, silicone resin and alumnia layer with reactive protection, melt film shielding protection and redox protection at high temperature separately combined, so that the paint has excellent high temperature iron and steel protecting function and capacity of reducing surface scale generating amount.
Description
Technical field
The present invention relates to a kind of heat resistant paint for iron and steel.Be used for the preceding protection of iron and steel thermal treatment.Belong to technical field of coatings.
Background technology
Usually steel surface can have dust, greasy dirt, oxide skin, corrosion layer, pollutent salinity or loosening old paint film, and wherein oxide skin is more common but the easiest uncared-for part.Oxide skin is one deck compact oxidation layer that iron and steel is produced when the high temperature forging forming, adheres to more firmly usually, but relatively iron and steel itself is then more crisp.Analyze from electrochemistry, the electropotential of oxide skin is than the high 0.15-0.20V of iron, in corrosive medium, iron corrodes prior to oxide skin, and especially when having a large amount of oxide skins to exist, a large amount of oxide skin is negative electrode, a small amount of exposed iron becomes primary anode, can quicken to promote the local corrosion of iron.In wet environment, the big negative electrode of oxide skin exposes the primary anode of steel surface with coming off oxide skin, causes the local corrosion of exposed area.Oxide skin and the countless micro gaps of steel surface physical presence, aqueous vapor and corrosive medium are penetrated into crevice corrosion and differential concentration corrosion take place again under the loosening oxide skin.Usually fully scale removal before the steel surface application, and the painting work of many steel surfaces is removed fully in oxide skin and just carried out, the result causes the shortening greatly in the inferior of coating quality and coating work-ing life.
Iron and steel is when being subjected to high-temperature heat treatment; at high temperature be easy to and airborne oxygen generation oxygenizement; make the oxidized and decarburization of iron and steel; cause the loss of material and the decline of mechanical property; thereby; iron and steel needs to take the certain protection measure in pyroprocessing, coating protection is a kind of very economical and effective means, has following advantage:
1, can avoid the oxidational losses of iron and steel when thermal treatment and the operation of scale removal, and make the specification of workpiece more accurate; Can avoid when thermal treatment because the decrease of fatigue strength that the metal decarburization causes prolongs iron and steel work-ing life; Can avoid metal surface when thermal treatment to absorb gas, prevent that metal from becoming fragile because of inhaling hydrogen.
2, coating protection can not be subjected to iron and steel parts complicated shape or limitation of size, and technology is simple, and is easy to operate, good economy performance.
The iron and steel heat treatment protective coating belongs to disposable use coating, applies coating before iron and steel thermal treatment, and thermal treatment finishes back coating protection effect to be finished, and coating comes off voluntarily.Heat treatment protective coating belongs to tailor-(made) coating, has obtained more application and development faster in recent years.For example, Britain BCRKTOP series protective cover can be effective to the thermal treatment protection of anti-carburizing.The pottery of U.S. Boeing extension set company, the anti-carburizing protection of silicate-base, the asbestos base of USSR (Union of Soviet Socialist Republics) and aluminium borate are master's anti-carburizing protective cover etc., have all obtained good application.China prevents that decarburization, antioxidizing paint also got application preferably; wherein; with the boron oxide is the anti-carburizing protective cover of main raw material; with glass is the anti-carburizing of main raw material, anti-hydrogenation coating; it with silicate anti-carburizing protective cover of main raw material etc.; all successively use aborning, and obtain better effects.Recent years is all set about the research of this respect by institute of the domestic Chinese Academy of Sciences and Jinan Iron And Steel Company, has carried out the preceding anti-oxidation spraying of stove heating, and through the blank sample contrast that sprays, billet surface oxide skin growing amount reduces more than 65%.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide to have very good anti-steel surface scaling performance under a kind of equality of temperature, can make billet surface oxide skin generation reduce lower heat resistant paint for iron and steel.
The object of the present invention is achieved like this: a kind of heat resistant paint for iron and steel is characterized in that it mainly is made up of the raw material of following weight part:
Ethyl-borate 20-25 part
Silicone resin 15-25 part
5%-10% polyvinyl butyral acetal aqueous isopropanol 5-10 part
Aluminium powder 15-20 part
Solvent 10-20 part
Dispersion agent 1-2 part,
Wherein, weight solid part of polyvinyl butyral acetal is 5%-10% in the aqueous isopropanol of polyvinyl butyral acetal.
Heat resistant paint for iron and steel of the present invention, also adding in the described coating raw material has 1～2 portion of organobentonite class anti-settling agent.
Heat resistant paint for iron and steel of the present invention, described silicone resin can be methyl silicone resins, epoxy modified silicone resin, polyester modification silicone resin, boron modified organic silicone resin etc.
Heat resistant paint for iron and steel of the present invention, described solvent can be two kinds or three kinds in dimethylbenzene, acetone, the propyl alcohol.
Heat resistant paint for iron and steel of the present invention, described dispersion agent can be the wetting or organo-siloxane class dispersion agents of negatively charged ion.
Coating of the present invention has following handling characteristics as the coating of high temperature applications:
1, can protect iron and steel oxide skin, not decarburization at high temperature not to occur.
2, coating does not have influence to physicals, mechanical property, the chemical ingredients of iron and steel or alloy, does not contain the composition of infringement or pollution metal in the coating.
3, dope layer can come off after Overheating Treatment voluntarily, is easy to remove.
4, the use temperature scope of coating is very wide, reach 800 ℃-1800 ℃, and at high temperature coating does not discharge toxic gas.
Concrete protection mechanism is:
1, ethyl-borate forms fused oxidation boron film about 600 ℃, and the oxide film of dissolving steel surface forms fine and close protective layer more than 900 ℃.
2, in coating heat-processed; silicone resin such as DC805 (once were used for space shuttle by the U.S. in the coating; high-temperature heat-resistance coating that can be anti-1371 ℃) when 700 ℃ of left and right sides; form the inorganic silicate ceramic-like thing of compact and firm, completely cut off atmosphere and contacted with steel surface and played provide protection.
3, in addition; aluminium powder utilization in the coating at high temperature is oxidized to the fine and close and ten minutes infusible alumina layer (about 2050 ℃ of fusing point) of one deck; in this redox reaction process; near because the big quantitative response of oxygen metallic aluminium and the steel surface; cause near the reactive gas of coating thin; and can not work with steel surface, play a very good protection.
This shows; why coating of the present invention has very good anti-steel surface scaling under equality of temperature; be because this coating combines present boron oxide, organosilicon and three kinds of materials that characteristics are arranged most of alumina layer in high temperature resistant, have response type protection, three kinds of different protection mechanism of protection of melt film shield type and oxidation-reduction type protection respectively.
We have carried out stove heating anti-oxidation spraying; through contrasting with the blank sample that sprays; billet surface oxide skin generation is reduced to about 90%; and the coating of the effect of the same race that other unit uses is about 65%; totally exceed 25%, this has benefited from coating of the present invention and combines three kinds of protection mechanism in one (response type protection mechanism, the protection of melt film shield type and oxidation-reduction type protection mechanism).This coating has stoped the oxidation of iron and steel when high temperature to a great extent.Dope layer can come off after Overheating Treatment voluntarily, is easy to remove.
Embodiment
Embodiment 1:
Heat resistant paint for iron and steel of the present invention, form by following raw material stirring mixing: ethyl-borate 23kg, methyl silicone resins 25kg, the aqueous isopropanol of 10% polyvinyl butyral acetal (solvent is a Virahol) 10kg, aluminium powder 20kg, dimethylbenzene 5kg, acetone 5kg, propyl alcohol 10kg and Fatty Alcohol(C12-C14 and C12-C18) sulphonate 2kg.
Embodiment 2:
Ethyl-borate 30kg, epoxy modified silicone resin 18kg, the aqueous isopropanol 10kg of 10% polyvinyl butyral acetal, aluminium powder 20kg, dimethylbenzene 5kg, propyl alcohol 15kg, sulphonated oil or methanesulfonate ester 2kg.All the other are with example 1.
Embodiment 3:
Ethyl-borate 30kg polyester modification silicone resin 18kg, the aqueous isopropanol 10kg of 10% polyvinyl butyral acetal, aluminium powder 20kg, dimethylbenzene 5kg, propyl alcohol 15kg, polydimethylsiloxane 2kg.All the other are with example 1.
Embodiment 4:
Ethyl-borate 23kg, poly-methyl organosiloxane resins 25kg, the aqueous isopropanol 8kg of 10% polyvinyl butyral acetal, aluminium powder 20kg, dimethylbenzene 5kg, acetone 2kg, propyl alcohol 15kg, polydimethylsiloxane 2kg.All the other are with example 1.
Embodiment 5:
Ethyl-borate: 23kg, epoxy modified silicone resin 25kg, the aqueous isopropanol 10kg of 5% polyvinyl butyral acetal, aluminium powder 20kg, dimethylbenzene 5kg, acetone 5kg, propyl alcohol 10kg, polydimethylsiloxane 2kg.All the other are with example 1.
Embodiment 6:
Ethyl-borate 23kg boron modified organic silicone resin 25kg, the aqueous isopropanol 8kg of 8% polyvinyl butyral acetal, aluminium powder 20kg, dimethylbenzene 5kg, acetone 2kg, propyl alcohol 15kg and organobentonite anti-settling agent 2kg.All the other are with example 1.
More than in each example, the solvent of the aqueous isopropanol of polyvinyl butyral acetal is Virahol.Weight solid part of polyvinyl butyral acetal is 5%-10% in the aqueous isopropanol of polyvinyl butyral acetal.
Claims (5)
1, a kind of heat resistant paint for iron and steel is characterized in that it mainly is made up of the raw material of following weight part:
Ethyl-borate 20-25 part
Silicone resin 15-25 part
Aqueous isopropanol 5-10 part of polyvinyl butyral acetal
Aluminium powder 15-20 part
Solvent 10-20 part
Dispersion agent 1-2 part,
Wherein, weight solid part of polyvinyl butyral acetal is 5%-10% in the aqueous isopropanol of polyvinyl butyral acetal,
The solvent of 5%-10% polyvinyl butyral acetal is a Virahol, the % concentration that is weight percentage,
Described silicone resin is methyl silicone resins, epoxy modified silicone resin, polyester modification silicone resin or boron modified organic silicone resin,
Described solvent is two kinds or three kinds in dimethylbenzene, acetone, the propyl alcohol,
Described dispersion agent is wetting class dispersion agent of negatively charged ion or organo-siloxane class dispersion agent.
2, a kind of heat resistant paint for iron and steel according to claim 1 is characterized in that in the described coating raw material also adding that 1-2 part organobentonite class anti-settling agent is arranged.
3, a kind of heat resistant paint for iron and steel according to claim 2 is characterized in that described organobentonite class anti-settling agent is: 2-methyl-2-hydrogenated tallow wilkinite ammonium salt, 2-methyl-2-hydrogenated tallow hectorite ammonium salt or 2-methyl-benzyl-hydrogenated tallow hectorite ammonium salt.
4, a kind of heat resistant paint for iron and steel according to claim 1 is characterized in that the wetting class dispersion agent of described negatively charged ion is: Fatty Alcohol(C12-C14 and C12-C18) sulphonate, sulphonated oil or methanesulfonate ester.
5, a kind of heat resistant paint for iron and steel according to claim 1 is characterized in that described organo-siloxane class dispersion agent is a polydimethylsiloxane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100235100A CN100535069C (en) | 2007-06-04 | 2007-06-04 | Heat resistant paint for iron and steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100235100A CN100535069C (en) | 2007-06-04 | 2007-06-04 | Heat resistant paint for iron and steel |
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| Publication Number | Publication Date |
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| CN101067067A CN101067067A (en) | 2007-11-07 |
| CN100535069C true CN100535069C (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100235100A Active CN100535069C (en) | 2007-06-04 | 2007-06-04 | Heat resistant paint for iron and steel |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928516B (en) * | 2009-09-01 | 2012-08-22 | 老虎粉末涂料制造（太仓）有限公司 | Thermostable powder paint with glazed surface and preparation method and application thereof |
| CN101824254B (en) * | 2010-05-10 | 2012-08-22 | 江苏科技大学 | Organosilicon-modified polyvinyl butyral coil coating |
| CN102352142B (en) * | 2011-04-07 | 2014-04-16 | 世林（漯河）冶金设备有限公司 | High-temperature nano-grade anti-carburizing material and coating, and application thereof |
| CN102558922B (en) * | 2011-12-20 | 2013-09-04 | 广州中国科学院工业技术研究院 | Delayed-combustion-retarding high-temperature-resisting workshop primer and preparation method thereof |
| CN102876225A (en) * | 2012-09-11 | 2013-01-16 | 南通博宇机电有限公司 | High-temperature resistant lubricating coating |
| CN103122209B (en) * | 2013-02-06 | 2015-06-17 | 江阴市大阪涂料有限公司 | High temperature resistant combustion-gas stream coating for rocket launching tower and diversion trench |
| CN103421362A (en) * | 2013-07-19 | 2013-12-04 | 吴江龙硕金属制品有限公司 | Antioxidant paint and preparation method thereof |
| CN103992738A (en) * | 2014-04-23 | 2014-08-20 | 江苏欣安新材料技术有限公司 | Silicone coating capable of resisting low temperature of -40DEG C, and preparation method thereof |
| CN105238265A (en) * | 2015-11-20 | 2016-01-13 | 天津美士邦涂料化工有限公司 | Organic silicone heat-resisting primer |
| CN106433259A (en) * | 2016-10-11 | 2017-02-22 | 安徽卡塔门窗有限公司 | High-temperature resistant coating for doors and preparation method thereof |
| JP7477643B2 (en) * | 2020-04-22 | 2024-05-01 | ダニエリ アンド チ．オフィチーネ メカーニク エッセピア | COATING COMPOSITIONS FOR METAL PRODUCTS AND ASSOCIATED METHODS - Patent application |
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| CN101067067A (en) | 2007-11-07 |
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