JP3790034B2 - Antioxidant paint for steel - Google Patents
Antioxidant paint for steel Download PDFInfo
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- JP3790034B2 JP3790034B2 JP02593698A JP2593698A JP3790034B2 JP 3790034 B2 JP3790034 B2 JP 3790034B2 JP 02593698 A JP02593698 A JP 02593698A JP 2593698 A JP2593698 A JP 2593698A JP 3790034 B2 JP3790034 B2 JP 3790034B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、ニッケル鋼などの鋼材（スラブ）に塗布して、均熱炉などの高温酸化雰囲気中における酸化スケールの発生を防止する鋼材用酸化防止塗料に関する。
【０００２】
【従来の技術】
ニッケル鋼などの鋼材は、スラブの形で均熱炉などで１０００〜１３００℃の温度に加熱され、圧延機で圧延されて鋼板とされる。均熱炉などでは窒素を吹込むなどして酸化を防いでいるが、完全に酸素を遮断することができず炉内でスラブ表面が酸化されスケールが発生し、これによって製品歩留りが低下し、またスケールが鋼板に入込み品質が低下するという問題がある。
【０００３】
スラブ表面の酸化およびスケールの発生を防止する方法として、スラブに薄鉄板の保護カバーを被せる方法が考えられるが、この方法は薄鉄板をスラブに取付けるのに手間がかかりまた薄鉄板が消耗品となり材料も嵩み実用的ではない。
【０００４】
スラブ表面の酸化およびスケールの発生を防止する典型的な従来技術として、シリカ、アルミナ、マグネシアなどの耐火性骨材にケイ素バインダを配合した無機の酸化防止塗料をスラブ表面に塗布する方法が特開昭６３−６０８０６に記載されている。
【０００５】
【発明が解決しようとする課題】
耐火性骨材にバインダとして水ガラスを加えた塗料は、均熱炉に投入されて急激に温度が上昇する際に発泡して均一で緻密な保護膜ができず、部分的に酸化防止効果が低下するという問題がある。水ガラスの代りに、急激な温度上昇でも発泡しないシリカゾルを用いることが考えられるが、シリカゾルをバインダとして用いた塗料は、被膜の機械的強度が弱く、スラブに塗布されて均熱炉に投入するまでの間に衝撃などによって微細な剥離（ヘアークラック）が生じやすく、このヘアークラックが発生していると、均熱炉に挿入後、ヘアークラックが発達し部分的に塗膜が剥離するという問題がある。
【０００６】
本発明の目的は、急激な加熱によって発泡せずまた初期段階で密着性が充分あって、多少の衝撃によってヘアークラックの発生がない被膜をスラブ表面に形成でき、均熱炉から取出した後被膜が容易に剥離できる鋼材用酸化防止塗料を提供することである。
【０００７】
【課題を解決するための手段】
本発明者らは、鋼材の酸化、スケール発生を防止する塗料の成分組成を検討した結果、耐火物粉末にバインダとしてシリカゾル、より好ましくは特定のシリカゾルと、硬化促進剤とを配合することによって、急激な温度上昇によっても発砲せずまた初期段階の密着性が充分あって、強度の高い被膜を鋼材表面に形成する塗料を完成した。
【０００８】
本発明は、耐火物粉末としてシリカ１００重量部に対し、バインダとしてアンモニウム４級塩で安定化したシリカゾルをＳｉＯ2換算で５〜５０重量部と、硬化促進剤として比表面積０．５〜５０ｍ 2 ／ｇであり、平均粒径１０μｍ以下のＭｇＯを５〜５０重量部とを配合したことを特徴とする鋼材用酸化防止塗料である。
【０００９】
本発明に従う鋼材用酸化防止塗料は、耐火物粉末にバインダと硬化促進剤とを配合したものである。
【００１０】
耐火物粉末としては、シリカが用いられる。シリカは後述のシリカゾルバインダとの密着性が良好であるためである。耐火物粉末の平均粒径は、０．５〜５０μｍのものが好ましく、さらに好ましくは１〜３０μｍである。粒径が大き過ぎると被膜中に泡ができやすく、粒径が小さ過ぎると被膜にクラックが生じやすく、いずれも酸化防止効果が低下して好ましくない。
【００１１】
バインダとして用いられるシリカゾルは、アンモニウム４級塩で安定化したシリカゾルである。一般にシリカゾルは、少量のＮａ 2 Ｏで安定化されている。本発明に従うシリカゾルは、Ｎａ 2 Ｏの代わりに４級アンモニウム塩で安定化されている。塗布時の密着性は、４級アンモニウム塩で安定化されたものが他のものに比べて高い。特に、硬化促進剤にＭｇＯを用いたときは、ＭｇＯとの反応性がマイルドであり、硬化促進剤混合後の可使用時間を長くすることができる。
シリカゾルの配合割合は、耐火物粉末１００重量部に対し、ＳｉＯ2として５〜５０重量部である。５重量部未満では密着性が低下し強い被膜ができない。また５０重量部を超えると耐火性が低下し均熱炉中で飛散するおそれがある。シリカゾルの市販品は、粒径が０．００２〜０．１μｍであり、市販品をそのまま用いてもよいが、０．０１〜０．０２μｍのものが好ましい。粒径が小さ過ぎると塗料の安定性に問題がありまた大きすぎると接着強度が低下する。
【００１２】
硬化促進剤としては、ＭｇＯが用いられる。硬化促進剤の配合割合は、耐火物粉末１００重量部に対し、５〜５０重量部である。これが５重量部未満では硬化促進剤としての効果がなく、また５０重量部を超えると反応性が高くなり、可使用時間が極端に短くなり、作業性が悪く均一な塗膜が得られない。なお硬化促進剤の配合割合は、ＭｇＯなどの比表面積と関係する。
【００１３】
また本発明は、前記硬化促進剤が比表面積０．５〜５０ｍ2／ｇであり、平均粒径１０μｍ以下のＭｇＯであることを特徴とする。
【００１４】
本発明に従う硬化促進剤は、比表面積、平均粒径および物質が前記のように特定される。平均粒径が１０μｍを超えると、硬化促進剤としての作用が劣り、耐酸化性に悪影響を及ぼすおそれがある。特に平均粒径の前記範囲は、硬化促進剤にＭｇＯを用いたときに重要である。
【００１５】
前記酸化促進剤中では、ＭｇＯが安定性に優れ、可使用時間が長いことが本発明者らによって確認されている。ＭｇＯが硬化促進剤として機能するためには、その粒径が１０μｍ以下であり、ＢＥＴ比表面積が０．５〜５０ｍ2／ｇ好ましくは５〜５０ｍ2／ｇであることが必要である。比表面積が０．５ｍ2／ｇ以下では、硬化促進剤として機能せず、またこれが５０ｍ2／ｇを超えると反応性が高くなり可使用時間が短くなる。硬化促進剤の配合割合と比表面積とは関係があり、可使用時間を長くするために配合割合を多くして比表面積を３０ｍ2／ｇ以下、好ましくは１０ｍ2／ｇ以下とすることも可能である。
【００１８】
また本発明は、前記耐火物粉末と、バインダと、硬化促進剤とにさらにシランカップリング剤を添加したことを特徴とする。
【００１９】
本発明に従う塗料は、さらにシランカップリング剤を含む。シランカップリング剤は、シリカゾルのバインダとしての密着性を補うものであり、その添加量は、固形分換算でシリカゾル中のＳｉＯ2の０．１〜５重量％が好ましい。
【００２０】
本発明の塗料の塗布方法は、スプレー塗布、刷毛塗りなど通常の塗布方法を使用することができる。塗膜厚みは通常３０〜５００μｍが好ましい。３０μｍを下回ると酸化防止効果が充分に発揮されず、５００μｍ以上では熱伝導に影響し、コスト的にも好ましくない。
【００２１】
本発明の塗料は鋼材として普通鋼、ＳＵＳ、ニッケル鋼等のスラブ用として適応できる。また酸化防止剤を塗布された鋼材は均一炉で加熱され炉から取出され圧延工程に入る。圧延工程で酸化防止剤が残留していると圧延後の鋼板に酸化防止剤が噛込み製品を駄目にするので、特に熱処理後の塗布物の完全剥離が重要となるが、本発明の酸化防止剤はこの点での適応に充分なものである。
【００２２】
【発明の実施の形態】
以下、本発明を実施例によってより詳しく説明するが、本発明はこれら実施例に限定されるものではない。
【００２３】
（実施例１）
固形分濃度２０％の４級アンモニウム塩安定化シリカゾル１００ｇに中心粒径５μｍのシリカ粉を１３５ｇ、固形分濃度１０％のシランカップリング剤１ｇを添加しスリーワンモーターで３０分撹拌し、酸化防止剤の主剤を得た。使用の直前に主剤に硬化剤として中心粒径１０μｍ、ＢＥＴ比表面積３０ｍ2／ｇのＭｇＯを１５ｇ添加し、ペイントシェーカーで混合した。混合後１時間以内に得られた酸化防止剤を厚み１ｍｍのニッケル鋼板の表面に乾燥時の厚みが２００μｍになるように塗布した。約１時間で乾燥し、３時間後に表面にセロテープを貼り、はがした際の塗料の剥離を調べたが、剥離していなかった。
【００２４】
１日風乾した後、６００℃の炉に入れ、１１００℃まで１時間で昇温した後、１時間保持した。塗布面はほとんど酸化されておらず、断面の酸化層厚みは５０μｍ以下であった。また、熱膨張の差によって冷却後塗膜は塗布面から完全に剥離していた。
【００２５】
（実施例２）
固形分濃度２０％の４級アンモニウム塩安定化シリカゾル１００ｇに中心粒径５μｍのシリカ粉を１３５ｇ添加しスリーワンモーターで３０分撹拌し、酸化防止剤の主剤を得た。使用の直前に主剤に硬化剤として中心粒径１０μｍ、ＢＥＴ比表面積３０ｍ2／ｇのＭｇＯを１５ｇ添加し、ペイントシェーカーで混合した。混合後１時間以内に得られた酸化防止剤を厚み１ｍｍのニッケル鋼板の表面に乾燥時の厚みが２００μｍになるように塗布した。約１時間で乾燥し、３時間後に表面にセロテープを貼り、はがした際の塗料の剥離を調べたが、粉末がテープにわずかに付着しただけで塗膜は剥離していなかった。
【００２６】
１日風乾した後、６００℃の炉に入れ、１１００℃まで１時間で昇温した後、１時間保持した。塗布面はほとんど酸化されておらず、断面の酸化層厚みは５０μｍ以下であった。また、熱膨張の差によって冷却後塗膜は塗布面から完全に剥離していた。
【００３５】
（比較例１）
固形分濃度２０％の４級アンモニウム塩安定化シリカゾル１００ｇに中心粒径７μｍのシリカ粉を１５０ｇ、固形分濃度１０％のシランカップリング剤１ｇを添加しスリーワンモーターで３０分撹拌し、酸化防止剤とした。混合後１時間以内に得られた酸化防止剤を厚み１ｍｍのニッケル鋼板の表面に乾燥時の厚みが２００μｍになるように塗布した。約１時間で乾燥し、３時間後に表面にセロテープを貼り、はがした際の塗料の剥離を調べたが、部分的に剥離が見られた。
【００３６】
１日風乾した後、６００℃の炉に入れ、１１００℃まで１時間で昇温した後、１時間保持した。剥離のなかった部分はほとんど酸化されておらず、断面の酸化層厚みは５０μ以下であったが、塗膜が剥離した部分は５００μｍ程度の酸化層を持っていた。
【００３７】
（比較例２）
固形分濃度２０％の４級アンモニウム塩安定化シリカゾル１００ｇに中心粒径７μｍのシリカ粉１５０ｇを添加しスリーワンモーターで３０分撹拌し、酸化防止剤とした。混合後１時間以内に得られた酸化防止剤を厚み１ｍｍのニッケル鋼板の表面に乾燥時の厚みが２００μｍになるように塗布した。約１時間で乾燥し、３時間後に表面にセロテープを貼り、はがした際の塗料の剥離を調べたが、鋼板の端部が完全に剥離していた。
【００３８】
１日風乾した後、６００℃の炉に入れ、１１００℃まで１時間で昇温した後、１時間保持した。剥離のなかった部分はほとんど酸化されておらず、断面の酸化層厚みは５０μ以下であったが、塗膜が剥離した部分は５００μｍ程度の酸化層を持っていた。
【００３９】
【発明の効果】
以上のように本発明によれば、耐火物粉末としてシリカとバインダとして４級アンモニウム塩で安定化したシリカゾルとに硬化促進剤として比表面積０．５〜５０ｍ 2 ／ｇであり、平均粒径１０μｍ以下のＭｇＯを配合した酸化防止塗料を鋼材スラブに塗布すると、鋼材スラブ表面に密着性が大きい被膜を形成し、鋼材スラブを均熱炉で加熱する際に酸化を防止し、酸化ロスを防ぐことによって鋼材の歩留りを向上することができる。また本発明の塗料による被膜は、均熱炉から取出した後、容易に剥離でき、圧延時に被膜が鋼板中に噛込むことがない。また本発明に従うシリカゾルは、Ｎａ 2 Ｏの代わりに４級アンモニウム塩で安定化されている。塗布時の密着性は、４級アンモニウム塩で安定化されたものが他のものに比べて高い。特に、硬化促進剤にＭｇＯを用いたときは、ＭｇＯとの反応性がマイルドであり、硬化促進剤混合後の可使用時間を長くすることができる。 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anti-oxidant paint for steel that is applied to a steel material (slab) such as nickel steel to prevent the generation of oxide scale in a high-temperature oxidizing atmosphere such as a soaking furnace.
[0002]
[Prior art]
A steel material such as nickel steel is heated to 1000 to 1300 ° C. in a soaking furnace or the like in the form of a slab, and is rolled into a steel plate by a rolling mill. In a soaking furnace or the like, nitrogen is blown to prevent oxidation, but oxygen cannot be completely shut off, the slab surface is oxidized in the furnace, and scale is generated, which reduces the product yield. Further, there is a problem that the scale enters the steel plate and the quality is deteriorated.
[0003]
One way to prevent slab surface oxidation and scale formation is to cover the slab with a thin steel plate protective cover. However, this method takes time and labor to attach the thin steel plate to the slab, and the thin iron plate becomes a consumable item. The material is bulky and not practical.
[0004]
As a typical conventional technique for preventing slab surface oxidation and scale generation, there is a method of applying an inorganic antioxidant paint containing a silicon binder to a refractory aggregate such as silica, alumina and magnesia on the slab surface. Sho 63-60806.
[0005]
[Problems to be solved by the invention]
Paint with water glass added as a binder to refractory aggregates is foamed when the temperature rises rapidly after being put in a soaking furnace, and a uniform and dense protective film cannot be formed. There is a problem of lowering. Instead of water glass, it is conceivable to use silica sol that does not foam even when the temperature rises suddenly. However, the coating material using silica sol as a binder has low mechanical strength and is applied to a slab after being applied to a slab. In the past, fine peeling (hair crack) is likely to occur due to impact, etc., and if this hair crack has occurred, the hair crack will develop after insertion into a soaking furnace, and the coating film will be partially peeled off There is.
[0006]
The object of the present invention is to form a coating on the slab surface that does not foam by rapid heating, has sufficient adhesion at the initial stage, and does not generate hair cracks due to some impact, and is then removed from the soaking furnace. Is to provide an anti-oxidation paint for steel that can be easily peeled off.
[0007]
[Means for Solving the Problems]
As a result of examining the component composition of the paint that prevents oxidation and scale generation of the steel material, the present inventors, as a binder, into the refractory powder as a binder, more preferably by combining a specific silica sol and a curing accelerator, A paint that does not shoot even with a sudden rise in temperature and has sufficient adhesion at the initial stage to form a high-strength coating on the steel surface was completed.
[0008]
The present invention is, relative to 100 parts by weight of silica as an anti-fire powder, 5-50 parts by weight in terms of SiO 2 stabilized silica sol with ammonium quaternary salt as a binder, the specific surface area 0.5~50m as a curing accelerator 2 / g, and 5 to 50 parts by weight of Mg 2 O having an average particle size of 10 μm or less .
[0009]
The antioxidant coating material for steel according to the present invention is a mixture of a refractory powder and a binder and a curing accelerator.
[0010]
The refractory powder, silica mosquitoes are used. This is because silica has good adhesion to a silica sol binder described later . The average particle size of the anti fire powder is preferably one of 0.5 to 50 [mu] m, more preferably from 1 to 30 [mu] m. If the particle size is too large, bubbles are likely to be formed in the coating, and if the particle size is too small, cracks are likely to occur in the coating.
[0011]
The silica sol used as the binder is a silica sol stabilized with an ammonium quaternary salt. In general, the silica sol is stabilized with a small amount of Na 2 O. The silica sol according to the invention is stabilized with a quaternary ammonium salt instead of Na 2 O. The adhesion at the time of application is higher than that of the others stabilized with a quaternary ammonium salt. In particular, when MgO is used as the curing accelerator, the reactivity with MgO is mild, and the usable time after mixing the curing accelerator can be increased.
The mixing ratio of the sheet Rikazoru, compared refractory powder 100 parts by weight, 5 to 50 parts by weight as SiO 2. If it is less than 5 parts by weight, the adhesion is lowered and a strong film cannot be formed. Moreover, when it exceeds 50 weight part, there exists a possibility that fire resistance may fall and it may disperse in a soaking furnace. A commercially available product of silica sol has a particle size of 0.002 to 0.1 μm, and a commercially available product may be used as it is, but a product of 0.01 to 0.02 μm is preferable. If the particle size is too small, there is a problem with the stability of the paint, and if it is too large, the adhesive strength is lowered.
[0012]
Mg 2 O is used as the curing accelerator. The mixture ratio of a hardening accelerator is 5-50 weight part with respect to 100 weight part of refractory powders. If it is less than 5 parts by weight, there is no effect as a curing accelerator, and if it exceeds 50 parts by weight, the reactivity becomes high, the usable time becomes extremely short, the workability is poor and a uniform coating film cannot be obtained. The blending ratio of the curing accelerator is related to the specific surface area such as MgO.
[0013]
In addition, the present invention is characterized in that the curing accelerator is MgO having a specific surface area of 0.5 to 50 m 2 / g and an average particle size of 10 μm or less.
[0014]
The curing accelerator according to the present invention is specified as described above in terms of specific surface area, average particle size and substance. When the average particle size exceeds 10 μm, the action as a curing accelerator is inferior, and there is a risk of adversely affecting the oxidation resistance. In particular, the above range of the average particle diameter is important when MgO is used as the curing accelerator.
[0015]
Among the oxidation accelerators, the present inventors have confirmed that MgO is excellent in stability and has a long usable time. In order for MgO to function as a curing accelerator, it is necessary that its particle size is 10 μm or less and the BET specific surface area is 0.5 to 50 m 2 / g, preferably 5 to 50 m 2 / g. When the specific surface area is 0.5 m 2 / g or less, it does not function as a curing accelerator, and when it exceeds 50 m 2 / g, the reactivity increases and the usable time is shortened. There is a relationship between the blending ratio of the curing accelerator and the specific surface area. To increase the usable time, the blending ratio is increased so that the specific surface area can be 30 m 2 / g or less, preferably 10 m 2 / g or less. It is.
[0018]
Further, the present invention is characterized in that a silane coupling agent is further added to the refractory powder, the binder, and the curing accelerator.
[0019]
The paint according to the present invention further comprises a silane coupling agent. The silane coupling agent supplements the adhesion of the silica sol as a binder, and the addition amount is preferably 0.1 to 5% by weight of SiO 2 in the silica sol in terms of solid content.
[0020]
The coating method of the present invention may be a normal coating method such as spray coating or brush coating. The coating film thickness is preferably 30 to 500 μm. When the thickness is less than 30 μm, the antioxidant effect is not sufficiently exhibited, and when the thickness is 500 μm or more, the heat conduction is affected, which is not preferable in terms of cost.
[0021]
The paint of the present invention can be applied as a steel material for slabs such as ordinary steel, SUS, nickel steel and the like. Further, the steel material coated with the antioxidant is heated in a uniform furnace, taken out of the furnace, and enters a rolling process. If the antioxidant remains in the rolling process, the antioxidant bites into the rolled steel sheet and destroys the product. Therefore, it is particularly important to completely remove the coating after the heat treatment. The agent is sufficient for adaptation in this respect.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
EXAMPLES Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to these Examples.
[0023]
Example 1
Antioxidant with 100g of quaternary ammonium salt stabilized silica sol with solid content of 20%, 135g of silica powder with central particle size of 5μm and 1g of silane coupling agent with solid content of 10%, and stirring for 30 minutes with Three One Motor The main agent was obtained. Immediately before use, 15 g of MgO having a center particle size of 10 μm and a BET specific surface area of 30 m 2 / g was added to the main agent as a curing agent and mixed with a paint shaker. The antioxidant obtained within 1 hour after mixing was applied to the surface of a nickel steel plate having a thickness of 1 mm so that the thickness upon drying was 200 μm. After drying in about 1 hour, after 3 hours, a cellophane tape was applied to the surface, and the peeling of the paint when peeled was examined, but it was not peeled off.
[0024]
After air-drying for 1 day, it was put into a furnace at 600 ° C., heated to 1100 ° C. over 1 hour, and held for 1 hour. The coated surface was hardly oxidized, and the thickness of the oxidized layer in the cross section was 50 μm or less. Moreover, the coating film was completely peeled from the coated surface after cooling due to the difference in thermal expansion.
[0025]
(Example 2)
135 g of silica powder having a center particle diameter of 5 μm was added to 100 g of quaternary ammonium salt stabilized silica sol having a solid content concentration of 20%, and the mixture was stirred with a three-one motor for 30 minutes to obtain an antioxidant main ingredient. Immediately before use, 15 g of MgO having a center particle size of 10 μm and a BET specific surface area of 30 m 2 / g was added to the main agent as a curing agent and mixed with a paint shaker. The antioxidant obtained within 1 hour after mixing was applied to the surface of a nickel steel plate having a thickness of 1 mm so that the thickness upon drying was 200 μm. After drying in about 1 hour, a tape was applied to the surface after 3 hours, and the peeling of the paint when it was peeled off was examined. However, the coating was not peeled off because the powder was only slightly adhered to the tape.
[0026]
After air-drying for 1 day, it was put into a furnace at 600 ° C., heated to 1100 ° C. over 1 hour, and held for 1 hour. The coated surface was hardly oxidized, and the thickness of the oxidized layer in the cross section was 50 μm or less. Moreover, the coating film was completely peeled from the coated surface after cooling due to the difference in thermal expansion.
[0035]
(Comparative Example 1)
To 100 g of quaternary ammonium salt stabilized silica sol with a solid content of 20%, 150 g of silica powder with a center particle size of 7 μm and 1 g of a silane coupling agent with a solid content of 10% are added and stirred for 30 minutes with a three-one motor, and an antioxidant. It was. The antioxidant obtained within 1 hour after mixing was applied to the surface of a nickel steel plate having a thickness of 1 mm so that the thickness upon drying was 200 μm. After drying in about 1 hour, after 3 hours, a cellophane tape was applied to the surface, and the peeling of the paint when peeled was examined. Partial peeling was observed.
[0036]
After air-drying for 1 day, it was put into a furnace at 600 ° C., heated to 1100 ° C. over 1 hour, and held for 1 hour. The portion where peeling did not occur was hardly oxidized, and the thickness of the oxidized layer in the cross section was 50 μm or less, but the portion where the coating film was peeled had an oxide layer of about 500 μm.
[0037]
(Comparative Example 2)
To 100 g of quaternary ammonium salt stabilized silica sol having a solid content concentration of 20%, 150 g of silica powder having a center particle diameter of 7 μm was added and stirred for 30 minutes with a three-one motor to obtain an antioxidant. The antioxidant obtained within 1 hour after mixing was applied to the surface of a nickel steel plate having a thickness of 1 mm so that the thickness upon drying was 200 μm. After drying for about 1 hour, 3 hours later, a cellophane tape was applied to the surface, and the peeling of the paint when peeled was examined. The end of the steel plate was completely peeled off.
[0038]
After air-drying for 1 day, it was put into a furnace at 600 ° C., heated to 1100 ° C. over 1 hour, and held for 1 hour. The portion where peeling did not occur was hardly oxidized, and the thickness of the oxidized layer in the cross section was 50 μm or less, but the portion where the coating film was peeled had an oxide layer of about 500 μm.
[0039]
【The invention's effect】
As described above, according to the present invention, silica as a refractory powder and silica sol stabilized with a quaternary ammonium salt as a binder have a specific surface area of 0.5 to 50 m 2 / g as a curing accelerator , and an average particle size of 10 μm. When the following anti-oxidation paint containing Mg 2 O is applied to a steel slab, a coating with high adhesion is formed on the surface of the steel slab, preventing oxidation when the steel slab is heated in a soaking furnace, and preventing oxidation loss. Thus, the yield of the steel material can be improved. Moreover, the film by the coating material of this invention can be easily peeled after taking out from a soaking furnace, and a film does not bite into a steel plate at the time of rolling. The silica sol according to the present invention is stabilized with a quaternary ammonium salt instead of Na 2 O. The adhesion at the time of application is higher than that of the others stabilized with a quaternary ammonium salt. In particular, when MgO is used as the curing accelerator, the reactivity with MgO is mild, and the usable time after mixing the curing accelerator can be increased.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02593698A JP3790034B2 (en) | 1998-02-06 | 1998-02-06 | Antioxidant paint for steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02593698A JP3790034B2 (en) | 1998-02-06 | 1998-02-06 | Antioxidant paint for steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11222564A JPH11222564A (en) | 1999-08-17 |
| JP3790034B2 true JP3790034B2 (en) | 2006-06-28 |
Family
ID=12179668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02593698A Expired - Lifetime JP3790034B2 (en) | 1998-02-06 | 1998-02-06 | Antioxidant paint for steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3790034B2 (en) |
Cited By (1)
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|---|---|---|---|---|
| CN102502678A (en) * | 2011-09-21 | 2012-06-20 | 镇江忆诺唯记忆合金有限公司 | Preparation method of nanometer TiO2-ATP (Adenosine Triphosphate) powder material |
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| JP5784637B2 (en) * | 2010-02-19 | 2015-09-24 | タタ、スティール、ネダーランド、テクノロジー、ベスローテン、フェンノートシャップＴａｔａ Ｓｔｅｅｌ Ｎｅｄｅｒｌａｎｄ Ｔｅｃｈｎｏｌｏｇｙ Ｂｖ | Strips, sheets or blanks suitable for hot forming, and methods for their production |
| CN102296166B (en) * | 2011-09-23 | 2013-09-04 | 贵州安吉航空精密铸造有限责任公司 | Method for preventing surface oxidation in thermal treatment process of investment steel casting |
| CN103643011A (en) * | 2013-11-20 | 2014-03-19 | 上海钫淦冶金科技有限公司 | Low-nickel steel high-temperature surface descaling separating agent |
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| CN104498682A (en) * | 2014-12-15 | 2015-04-08 | 贵州安吉航空精密铸造有限责任公司 | Heat treatment method of casting in precision-investment casting |
| CN105177247A (en) * | 2015-08-28 | 2015-12-23 | 济南昊泽环保科技有限公司 | Oxidation and decarbonization preventing paint for workpiece |
| CN105177250A (en) * | 2015-08-28 | 2015-12-23 | 济南昊泽环保科技有限公司 | High-temperature decarburization-resistant coating |
| CA3049283A1 (en) * | 2017-01-09 | 2018-07-12 | Henkel Ag & Co. Kgaa | A curable protective coating composition |
| CN110452565B (en) * | 2019-07-25 | 2021-03-26 | 太原理工大学 | High-temperature-resistant oxidation-resistant coating for hot rolling of nickel-based alloy and preparation method thereof |
-
1998
- 1998-02-06 JP JP02593698A patent/JP3790034B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502678A (en) * | 2011-09-21 | 2012-06-20 | 镇江忆诺唯记忆合金有限公司 | Preparation method of nanometer TiO2-ATP (Adenosine Triphosphate) powder material |
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| Publication number | Publication date |
|---|---|
| JPH11222564A (en) | 1999-08-17 |
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