JPH01246378A - Method for preventing rusting of hot coil - Google Patents
Method for preventing rusting of hot coilInfo
- Publication number
- JPH01246378A JPH01246378A JP7567188A JP7567188A JPH01246378A JP H01246378 A JPH01246378 A JP H01246378A JP 7567188 A JP7567188 A JP 7567188A JP 7567188 A JP7567188 A JP 7567188A JP H01246378 A JPH01246378 A JP H01246378A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- rust
- hot
- temperature
- hot coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 17
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 48
- 150000001412 amines Chemical class 0.000 claims abstract description 7
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims abstract description 3
- 229910000165 zinc phosphate Inorganic materials 0.000 claims abstract description 3
- 230000003449 preventive effect Effects 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 13
- 238000001035 drying Methods 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 6
- 239000003112 inhibitor Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000316887 Saissetia oleae Species 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004455 differential thermal analysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/141—Amines; Quaternary ammonium compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は圧延後のホットコイルの錆防止方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for preventing rust on hot coils after rolling.
従来より、冷間圧延後のコイルについては、例えば電解
洗浄時における腐食の防止やその後のコイル保管中にお
ける発錆防止のために防錆剤が用いられている。一方、
圧延後のホットコイルについても、保管中における錆の
発生を防止するため、散水冷却したりあるいは冷却水を
満たした水槽に浸漬して冷却する場合冷却水中に防錆剤
を添加する方法がとられており１．また、常温まで冷却
したコイルに防錆剤を含有させた水溶液を塗布する方法
も行なわれている。その際、乾燥が不十分でコイルの表
面に水ン需れがあると、後工程でスキンバス、シャー等
の乾式で行なう作業において表面疵が発生し易いので、
ドライヤー等による乾燥工程を通ずことが必要である。Conventionally, rust preventive agents have been used for coils after cold rolling, for example, to prevent corrosion during electrolytic cleaning and to prevent rust from forming during subsequent storage of the coil. on the other hand,
In order to prevent the formation of rust during storage, hot coils after rolling are cooled by spraying water or by being immersed in a water tank filled with cooling water, by adding a rust preventive agent to the cooling water. 1. Another method is to apply an aqueous solution containing a rust preventive to a coil that has been cooled to room temperature. At that time, if the surface of the coil is not sufficiently dried and there is water leakage, surface flaws are likely to occur during subsequent dry processes such as skin bathing and shearing.
It is necessary to pass through a drying process using a dryer or the like.
しかしながら、上記従来の散水中に防錆剤を添加する方
法は、ホットコイルが高温であるため添加した防錆剤の
大部分が揮発して防錆効果が失なわれる。また、防錆剤
を含イｆする冷却水をｉ仰たした水槽にコイルを浸漬し
たり、あるいは常温付近まで冷却したコイルに防錆剤を
含有させた水溶液をゆ布する方法は、乾燥工程を必要と
するか、あるいは対象とするコイルが水濡れしていても
後工程で問題の生じない酸洗用のホットコイルに限定さ
れるという欠点があり、解決を要する３題であった。However, in the above-mentioned conventional method of adding a rust preventive agent to sprinkled water, since the hot coil is at a high temperature, most of the added rust preventive agent evaporates and the rust preventive effect is lost. In addition, methods such as immersing the coil in a water tank filled with cooling water containing a rust preventive agent, or spraying an aqueous solution containing a rust preventive agent on a coil that has been cooled to around room temperature are methods that can be used during the drying process. There are three problems that need to be solved, such as being limited to hot coils for pickling, which do not cause problems in the subsequent process even if the target coil is wet with water.
〔３ｒｓを解決するだめの手段〕
本発明は上記課題を解決し、短時間で、しかも特別の工
程を通すことなく圧延後のホットコイルに防錆処理を施
す手段を提供することを目的とするもので、アミン系、
りん酸亜鉛系等の防錆剤を含有する水溶液中に高温状態
のホットコイルを浸漬し、該コイルの温度が１００〜１
５０℃まで低下した後面記防錆剤を含「する水溶液から
取り出し、放冷することを特徴とするホットコイルの錆
防止方法である。[Means for Solving 3rs] The purpose of the present invention is to solve the above-mentioned problems and provide a means for applying rust prevention treatment to a hot coil after rolling in a short time and without going through any special process. Amine-based,
A hot coil in a high temperature state is immersed in an aqueous solution containing a rust preventive agent such as zinc phosphate, and the temperature of the coil is 100 to 1.
This is a method for preventing rust of a hot coil, which is characterized in that the hot coil is taken out of an aqueous solution containing the rust preventive agent described below at a temperature of 50° C. and allowed to cool.
以下に本発明の詳細な説明する。The present invention will be explained in detail below.
第１図は圧延直後のホットコイルに対し本発明による防
錆処理を施す場合の工程の一例を模式的に示した説明図
である。同図において、圧延後巻き取られたコイル（１
）を空冷し、防錆剤を含有する水溶液（２）をｉ葭だし
た水槽（３）に浸漬して薬剤処理を行ない、コイル（１
）の温度が１００〜１５０℃の範囲内まで低下した後前
記水ｉｆｆ （３）から取り出し、放冷、乾燥する。FIG. 1 is an explanatory diagram schematically showing an example of a process in which a hot coil immediately after rolling is subjected to rust prevention treatment according to the present invention. In the figure, the coil (1
) is air-cooled, and the coil (1
) After the temperature of the sample is lowered to within the range of 100 to 150°C, the sample is taken out from the water iff (3), left to cool, and dried.
薬剤処理後 コイルを水槽から取り出す温度を１００〜
１５０°Ｃの範囲内としたのは、取り出しｔＡ度が前記
温度範囲より高いと防錆剤の蒸発、分解により防錆効果
が失なわれ、逆に取り出し温度が前記温度範囲より低い
とコイル状に巻き取られた調帯の隙間に浸透した防錆剤
含有水溶液からの水分の蒸発が不完全になるためである
。After chemical treatment, take the coil out of the water tank at a temperature of 100~
The temperature was set within the range of 150°C because if the take-out temperature is higher than the above temperature range, the rust preventive effect will be lost due to evaporation and decomposition of the rust preventive agent, and conversely, if the take-out temperature is lower than the above temperature range, the coiled shape will be lost. This is because the moisture from the aqueous solution containing the rust preventive agent that has penetrated into the gaps between the belts wound around the belt is incompletely evaporated.
防錆剤としては、１００〜１５０°Ｃの温度範囲で蒸発
、分解速度があまり大きくなく、水分蒸発後鋼帯表面に
残留することが必要であり、一般に市販されているアミ
ン系やりん酸亜鉛系の防錆剤が使用可能である。防錆剤
の濃度は市販品で規定されている濃度範囲であればよ（
、例えば栗田工業叩製のアミン系の金属表面汚れ防止剤
の場合は２００〜６００ ｗｇ／Ａとすればよい。As a rust preventive agent, the rate of evaporation and decomposition is not very high in the temperature range of 100 to 150°C, and it is necessary that it remains on the surface of the steel strip after water evaporates. Rust inhibitors can be used. The concentration of the rust preventive agent should be within the concentration range specified for commercially available products (
For example, in the case of an amine-based metal surface stain preventive agent manufactured by Kurita Kogyo Tamadei, it may be 200 to 600 wg/A.
尚、圧延後巻き取られたコイルは、防錆剤含有水溶液浸
漬前に３００°Ｃ以下に空冷してお（ことが好ましい。The coil wound up after rolling is preferably air-cooled to 300° C. or lower before being immersed in an aqueous solution containing a rust preventive agent.
これは、後述するように銅帯の表面に密行性のよい緻密
なスケールである黒皮を形成させるためである。尚、下
限は前記薬剤処理の温度範囲を考慮して１５０℃より若
干高めの温度とするのが適当である。This is to form black scale, which is a dense scale with good density, on the surface of the copper strip, as will be described later. Incidentally, the lower limit is appropriately set to a temperature slightly higher than 150° C. in consideration of the temperature range of the chemical treatment.
上記本発明の錆防止方法を適用するにあたり、前述のよ
うに薬剤処理前にホットコイルを３００℃以下に空冷す
るのが好ましいとしたのは、本発明が黒皮のまま製品と
して出荷されるコイルを対象としており、密行性の良い
黒皮を得る為には以下の理由により、高温状儂から３０
０℃以下に空冷するのが好ましいからである。すなわち
、銅帯表面のスケール層はＦｅ（母材） ／ＦｅＯ／Ｆ
ｅ３０ａの構造をなしており、空冷中に内層のＦｅ０層
が次式４式％（１）
により共析変態を起こし、密行性のよい黒皮が形成され
るが、前記（１）式の反応速度は４７０〜４００°Ｃの
温度範囲で最も速＜、３００℃付近で反応が終了するか
らである。In applying the rust prevention method of the present invention, it is preferable to air-cool the hot coil to 300°C or less before chemical treatment as described above.The reason why the present invention is for coils that are shipped as products with black skin In order to obtain black skin with good density, it is necessary to
This is because it is preferable to air-cool to 0° C. or lower. That is, the scale layer on the surface of the copper strip is Fe (base material) /FeO/F
It has a structure of e30a, and during air cooling, the inner Fe0 layer undergoes eutectoid transformation according to the following formula 4% (1), forming a black crust with good density. This is because the reaction rate is the fastest in the temperature range of 470 to 400°C, and the reaction ends at around 300°C.
次に、薬剤処理後、コイルを水槽から取り出す温度を１
００〜１５０℃としたのは、前述のように防錆剤の蒸発
、分解の問題とコイル状に巻き取られた銅帯の隙間から
の水分の蒸発の問題とが関連する。Next, after the chemical treatment, the temperature at which the coil is removed from the water tank is set to 1.
The reason why the temperature is set at 00 to 150°C is related to the problem of evaporation and decomposition of the rust preventive agent and the problem of evaporation of water from the gap between the coiled copper strips, as described above.
第２図はアミン系防錆剤の熱による蒸発、分解の挙動を
示差熱分析により調査した結果で、上記防錆剤を試料と
してＮ２ガス雰囲気中昇温速度５℃／分で室温から８０
０℃まで昇温させた場合の温度と蒸発、分解の割合（以
下揮発率（％）という）との関係を示した線図である。Figure 2 shows the results of investigating the evaporation and decomposition behavior of amine-based rust preventives due to heat using differential thermal analysis.
It is a diagram showing the relationship between the temperature and the rate of evaporation and decomposition (hereinafter referred to as volatilization rate (%)) when the temperature is raised to 0°C.
同図から、温度が低い程防錆剤の揮発率は小さく、すな
わち防錆剤の残留が大きく、温度が上がるにつれて減少
し、８００°Ｃでは１０％程度しか残留しないが、１０
０〜１５０℃の温度範囲では５０％近（が残留している
ことがわかる
一方、コイルを水槽から引き上げた後、ドライヤー等に
よる乾燥工程を通さす放冷する間にコイルの保有してい
る熱によりコイル状に巻き取られた鋼帯の隙間に浸透し
た水分を蒸発させ、短時間で乾燥状態にするためには、
コイルの温度が少なくとも１００℃以上であることが必
要である。従って、前記１００〜１５０℃の温度範囲で
コイルを水槽から取り出すこととすれば、防錆剤の損失
を５０％程度にとどめて防錆効果も十分発揮させながら
コイルの保を熱で水分を蒸発させ、短時間で乾燥軟融と
することができる。From the same figure, it can be seen that the lower the temperature, the lower the volatility of the rust preventive agent, that is, the more rust preventive remains, and it decreases as the temperature rises.At 800°C, only about 10% remains, but 10
It can be seen that in the temperature range of 0 to 150 degrees Celsius, nearly 50% of the heat remains.However, after the coil is taken out of the water tank, the heat retained in the coil during the drying process using a dryer etc. In order to evaporate the moisture that has penetrated into the gaps in the steel strip wound into a coil and dry it in a short time,
It is necessary that the temperature of the coil is at least 100°C or higher. Therefore, if the coil is taken out from the water tank in the temperature range of 100 to 150 degrees Celsius, the loss of the rust preventive agent will be limited to about 50%, and the rust prevention effect will be sufficiently exhibited while retaining the coil and evaporating the moisture using heat. It can be dried and softened in a short time.
以下、実施例に基づいて説明する。 The following will explain based on examples.
熱間圧延後、コンベアにより移送されてきたホットコイ
ルについて、本発明の錆防止方法を適用して防錆処理を
行なっに０用いた防錆剤は栗田工業側製のアミン系の金
属表面汚れ防止剤Ｅ−１７９７で、濃度を６ｇ／ｌに調
整した。After hot rolling, the hot coils transferred by a conveyor were subjected to rust prevention treatment by applying the rust prevention method of the present invention.The rust prevention agent used was Kurita Water Industries' amine-based metal surface stain prevention agent. The concentration was adjusted to 6 g/l with agent E-1797.
前記第１図に示した本発明の実施工程に基づき、まず、
移送されてきたホットコイルを放冷Ｑｍに静置し空冷し
た。次いで前記ホットコイルの温度が３００℃程度まで
低下した時点でクレーンにより前記ホットコイルを前記
のように調整した防錆剤含有水溶液を満たした水槽に浸
漬し、該浸漬したコイルの温度が１５０°Ｃ程度になっ
た時点で再度クレーンによりコイルを水槽から引き上げ
放冷場所に静置して放冷した。上記のように処理したコ
イルは、スキンバス、シャー等の後工程において水？罵
れに起因する表面疵の発生もなく、シャー切断後の切仮
について調査の結果、錆の発生も認められなかった。Based on the implementation process of the present invention shown in FIG. 1, first,
The hot coil that had been transferred was left to stand still in a cooling environment Qm and cooled with air. Next, when the temperature of the hot coil has decreased to about 300°C, the hot coil is immersed by a crane into a water tank filled with the aqueous solution containing the rust preventive agent prepared as described above, and the temperature of the immersed coil is 150°C. When the temperature reached this point, the coil was again lifted from the water tank using a crane and left to cool in a cooling area. The coils treated as described above do not contain water in subsequent processes such as skin bath and shearing. There were no surface flaws caused by abuse, and an investigation of the cutting after shear cutting revealed no rust.
以上説明したように、ホットコイルの防錆処理において
、防錆剤を含をする水溶液中に高温状態のホットコイル
を浸漬し、該コイルの温度が所定の温度範囲まで低下し
た後取り出して放冷する本発明の錆防止方法を適用する
ことにより、処理後の乾燥工程を必要とせず短時間で防
錆処理を施すことができる。本発明はホットコイルの存
する熱を作動に利用するもので、特に黒皮付きホットコ
イルの保管中における発錆防止の簡便法として実用価値
が大きい。As explained above, in the rust prevention treatment of hot coils, a hot coil in a high temperature state is immersed in an aqueous solution containing a rust preventive agent, and after the temperature of the coil has decreased to a predetermined temperature range, it is taken out and left to cool. By applying the rust prevention method of the present invention, rust prevention treatment can be performed in a short time without requiring a drying step after treatment. The present invention utilizes the heat existing in the hot coil for operation, and has great practical value, especially as a simple method for preventing rusting during storage of the hot coil with black crust.
第１図は本発明の実施工程の一例を模式的に示す説明図
、第２図はアミン系防錆剤についての温度と揮発率との
関係を示す線図である。
１・・・コイル ２・・・防錆剤含有水溶液３・・
・水槽FIG. 1 is an explanatory diagram schematically showing an example of the implementation process of the present invention, and FIG. 2 is a diagram showing the relationship between temperature and volatilization rate of an amine-based rust inhibitor. 1... Coil 2... Rust inhibitor-containing aqueous solution 3...
・Aquarium
Claims (1)
に高温状態のホットコイルを浸漬し、該コイルの温度が
１００〜１５０℃まで低下した後前記防錆剤を含有する
水溶液から取り出し、放冷することを特徴とするホット
コイルの錆防止方法。A hot coil at high temperature is immersed in an aqueous solution containing an amine-based or zinc phosphate-based rust preventive agent, and after the temperature of the coil has decreased to 100 to 150°C, it is removed from the aqueous solution containing the rust preventive agent. , a method for preventing rust in hot coils, which is characterized by allowing them to cool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7567188A JPH01246378A (en) | 1988-03-28 | 1988-03-28 | Method for preventing rusting of hot coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7567188A JPH01246378A (en) | 1988-03-28 | 1988-03-28 | Method for preventing rusting of hot coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01246378A true JPH01246378A (en) | 1989-10-02 |
Family
ID=13582896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7567188A Pending JPH01246378A (en) | 1988-03-28 | 1988-03-28 | Method for preventing rusting of hot coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01246378A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059017A (en) * | 2017-04-21 | 2017-08-18 | 马鞍山纽泽科技服务有限公司 | A kind of highly effective antirust liquid and its synthesis technique |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6365092A (en) * | 1986-09-05 | 1988-03-23 | Asahi Glass Co Ltd | Corrosion inhibitor for metal |
-
1988
- 1988-03-28 JP JP7567188A patent/JPH01246378A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6365092A (en) * | 1986-09-05 | 1988-03-23 | Asahi Glass Co Ltd | Corrosion inhibitor for metal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059017A (en) * | 2017-04-21 | 2017-08-18 | 马鞍山纽泽科技服务有限公司 | A kind of highly effective antirust liquid and its synthesis technique |
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