JPH07145463A - Method and device for hot dip metal coating - Google Patents
Method and device for hot dip metal coatingInfo
- Publication number
- JPH07145463A JPH07145463A JP29351793A JP29351793A JPH07145463A JP H07145463 A JPH07145463 A JP H07145463A JP 29351793 A JP29351793 A JP 29351793A JP 29351793 A JP29351793 A JP 29351793A JP H07145463 A JPH07145463 A JP H07145463A
- Authority
- JP
- Japan
- Prior art keywords
- plating
- bath
- snout
- plating bath
- steel sheet
- 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.)
- Withdrawn
Links
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は溶融亜鉛めっき、合金化
溶融亜鉛めっき、溶融アルミニウムめっき、溶融亜鉛−
アルミニウム系合金めっき等の溶融金属めっき方法及び
その装置に関するものである。The present invention relates to hot dip galvanizing, hot dip galvanizing, hot dip aluminum coating, hot dip galvanizing-
The present invention relates to a method for hot-dip metal plating such as aluminum alloy plating and an apparatus therefor.
【０００２】[0002]
【従来の技術】従来、溶融金属めっき法としては、被め
っき鋼板を加熱焼鈍した後上部が焼鈍炉に接続し、下端
が溶融金属めっき浴に浸漬されたスナウトの内部を通
り、溶融金属めっき浴中に浸漬され、浴中のポットロー
ルにより進行方向を変えて上方に引上げ、気体絞り法に
より溶融金属めっきの付着量を制御し溶融金属めっき鋼
板を得る方法である。鋼板がスナウト部を通ってめっき
浴に浸漬された際、鋼板表面もしくはめっき浴面上にダ
スト、スカム、ドロス、焼鈍炉耐火煉瓦の破片、粉末等
の異物が付着すると、めっき表面欠陥、合金化反応異状
等の問題を生ずる。2. Description of the Related Art Conventionally, as a hot dip metal plating method, a steel sheet to be plated is heated and annealed, an upper part thereof is connected to an annealing furnace, and a lower end thereof is passed through an inside of a snout immersed in the hot dip metal plating bath to form a hot dip metal bath. It is a method of obtaining a hot-dip metal-plated steel sheet by immersing it inside, changing the direction of travel by a pot roll in a bath and pulling it upward, and controlling the amount of hot-dip metal plating adhered by a gas drawing method. When the steel sheet is immersed in the plating bath through the snout portion, if foreign matter such as dust, scum, dross, fragments of annealing furnace refractory bricks, powder, etc. adheres to the steel plate surface or plating bath surface, plating surface defects and alloying Problems such as abnormal reaction occur.
【０００３】これらの問題を解消するために、従来より
種々の方法が提案されている。例えば、特公平２−２５
９８１号公報や特公平３−４９９８１号公報のように、
スナウト内に導入する雰囲気中の水素、酸素濃度を特定
濃度以下の不活性ガス雰囲気にしてスカムの発生を防止
しようとする方法や特開昭６１−１８６４６３号公報の
ように、スナウト内に浸漬する鋼板の幅方向の一方向側
に配設された吐出口から鋼板幅方向に向けて溶融亜鉛を
吐出させ、浮遊ドロス等の浴面上の浮遊物をストリップ
幅方向に沿ってスナウト幅方向の他方の側に流動させ、
かつ他端側より浮遊物を回収することにより、スナウト
内の浮きドロス等により鋼板めっき欠陥を防止する方法
が知られている。In order to solve these problems, various methods have been conventionally proposed. For example, Japanese Patent Publication 2-25
As in Japanese Patent Publication No. 981 and Japanese Patent Publication No. 3-49981,
As described in JP-A-61-186463 and a method of preventing the generation of scum by setting an atmosphere of hydrogen and oxygen in the atmosphere to be introduced into the snout to an inert gas atmosphere having a specific concentration or less, dipping into the snout. Molten zinc is discharged toward the steel plate width direction from the discharge port arranged on one side in the width direction of the steel plate, and floating substances such as floating dross on the bath surface are stripped along the strip width direction in the other side of the snout width direction. To the side of
In addition, a method is known in which floating material is collected from the other end side to prevent steel plate plating defects due to floating dross in the snout.
【０００４】また、特開平４−２７６０５１号、特開平
４−２７６０５２号公報のように、スナウト内に浸漬す
る鋼板の幅方向の一端側から他端側に向けて不活性ガス
をめっき浴面上に吹き付けることにより、浴面上のスカ
ム等を払拭し、かつ他端でスナウト外へ排出することに
より、スカム等が鋼板に付着するのを防止しようとする
方法や特公昭６０−２６５４号公報のように、溶融金属
めっき浴面下に鋼板の全幅に渡たるスリットノズルを設
け、鋼板がめっき浴に侵入する近傍の鋼板に向けて溶融
めっき液を噴出させることにより、めっきされた鋼板の
表面への異物付着を防止しようとするものである。Further, as in JP-A-4-276051 and JP-A-4-276052, an inert gas is applied on the plating bath surface from one end side to the other end side in the width direction of the steel plate immersed in the snout. By spraying the scum on the surface of the bath and discharging the scum on the other end to the outside of the snout, and the method of preventing the scum from adhering to the steel sheet and Japanese Patent Publication No. 60-2654. Thus, by providing a slit nozzle across the entire width of the steel plate below the surface of the molten metal plating bath and ejecting the molten plating solution toward the steel plate in the vicinity where the steel plate enters the plating bath, the surface of the plated steel plate is It is intended to prevent the adhesion of foreign matter.
【０００５】しかし、何れの方法にも、それぞれの欠点
があり、鋼板への異物付着を防止することが出来ない。
すなわち、特公平２−２５９８１号公報や特公平３−４
９９８１号公報による方法では、単にスナウト内を雰囲
気ガス組成を規制したのみでは、スカム発生を少なくす
ることが出来るが完全に無くすることは出来ないし、仮
に出来た場合に鋼板に付着して持ち込まれる異物やスナ
ウト内壁等からめっき浴面に落下する異物等の除去は出
来ないという問題がある。また、特開昭６１−１８６４
６３号公報、特開平４−２７６０５１号及び特開平４−
２７６０５２号公報の方法では浴面の異物量を低減させ
る効果は得られるものの、スナウト内の一端側から他端
側に異物を払拭する過程で一部が鋼板に付着するため
に、異物付着の完全防止とならないという問題があっ
た。However, each of the methods has its respective drawbacks, and cannot prevent foreign matter from adhering to the steel sheet.
That is, Japanese Patent Publication No. 2-25981 and Japanese Patent Publication No. 3-4
In the method according to Japanese Patent Publication No. 9981, scum generation can be reduced but not completely eliminated by simply controlling the atmosphere gas composition in the snout, and if it is possible, it will be attached to the steel sheet and brought in. There is a problem in that it is impossible to remove foreign matter or foreign matter that falls from the inner wall of the snout to the plating bath surface. Also, JP-A-61-1864
63, JP-A-4-276051 and JP-A-4-276051.
Although the method of Japanese Patent No. 276052 can obtain the effect of reducing the amount of foreign matter on the bath surface, a part of the foreign matter adheres to the steel plate in the process of wiping the foreign matter from one end side to the other end side in the snout, so that the foreign matter is completely attached. There was a problem that it did not prevent.
【０００６】更には、特公昭６０−２６５４号公報の方
法では、鋼板近傍の異物を排除するためには強い圧力で
めっき浴を噴出する必要があるため、ランニングコスト
が嵩むばかりでなく、鋼板端部は両側のスリットノズル
からのめっき液滴が衝突するため、異物の排除効果が失
われたり、めっき浴面波立ちによる異物巻き込み等の問
題が生ずる。Further, according to the method disclosed in Japanese Patent Publication No. 60-2654, it is necessary to eject the plating bath with a strong pressure in order to remove the foreign matter in the vicinity of the steel sheet. Since the plating droplets from the slit nozzles on both sides collide with each other, the effect of eliminating foreign matter is lost, and problems such as entrainment of foreign matter due to ripples in the plating bath surface occur.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、上述したよ
うな問題を解消し、極めて簡単な装置によって、鋼板が
スナウト部を通ってめっき浴に浸漬される際、鋼板表面
もしくは、めっき浴面上のスカム、ドロスの発生を防止
することにより、めっき表面欠陥、特に合金化反応に伴
う表面外観の問題が生ずるのを防止することを目的とす
るものである。DISCLOSURE OF THE INVENTION The present invention solves the problems described above, and when a steel sheet is immersed in a plating bath through a snout portion by a very simple device, the steel sheet surface or the plating bath surface is By preventing the above-mentioned scum and dross from occurring, it is intended to prevent a plating surface defect, particularly a problem of surface appearance due to an alloying reaction.
【０００８】[0008]
【課題を解決するための手段】上述したような目的を達
成するためのものであって、その発明の要旨とするとこ
ろは、 （１）溶融金属めっきのスナウト部で鋼板がめっき浴に
浸漬するスナウト内のめっき浴面上に浴面被覆材を浮上
させ、浴面を覆うことにより、浴面でのスカム発生を防
止することを特徴とする溶融金属めっき方法。 （２）溶融金属めっきのスナウト部で鋼板がめっき浴に
浸漬するスナウト内のめっき浴面上に開閉可能な浴面被
覆材を配設したことを特徴とする溶融金属めっき装置に
ある。Means for Solving the Problems In order to achieve the above-mentioned objects, the gist of the invention is as follows: (1) A steel sheet is immersed in a plating bath at a snout portion of hot dip metal plating. A molten metal plating method, characterized in that a bath surface coating material is floated on a plating bath surface in a snout to cover the bath surface, thereby preventing scum from occurring on the bath surface. (2) The hot-dip metal plating apparatus is characterized in that an openable and closable bath surface coating material is provided on the plating bath surface in the snout where the steel plate is immersed in the plating bath at the snout portion of the hot dip metal plating.
【０００９】以下、本発明について図面に従って詳細に
説明する。図１は本発明に係るめっき工程を示す縦断面
図である。連続溶融金属めっき装置では、図１に示すよ
うに、連続焼鈍炉から出た鋼板１がスナウト２内を通っ
てめっき槽内のめっき浴３中に浸漬された後ポットロー
ル４を経てめっき浴３外へ引き出され、更に浴外のガス
ワイピングノズル７にて表面に余剰に付着しためっき層
が払拭されて、鋼板１表面に所定厚みのめっきが施され
る。その後合金化処理される場合には合金化加熱装置が
配設される。The present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical sectional view showing a plating process according to the present invention. In the continuous hot-dip galvanizing apparatus, as shown in FIG. 1, a steel plate 1 discharged from a continuous annealing furnace is passed through a snout 2 and immersed in a plating bath 3 in a plating tank, and then a pot roll 4 is passed through the plating bath 3. Then, the gas wiping nozzle 7 outside the bath wipes away the excessive plating layer adhered to the surface, so that the surface of the steel plate 1 is plated with a predetermined thickness. When the alloying treatment is performed thereafter, an alloying heating device is provided.
【００１０】[0010]
【作用】溶融金属めっきにおいて、スナウト内めっき浴
面上には鋼板により炉内から運ばれてくる鉄粉、焼鈍炉
耐火レンガの破片、粉末等の異物や浴面より溶融金属が
蒸発し、その後雰囲気中の微量酸素又は水蒸気と反応し
て生成する浮遊酸化物や、スナウト内のめっき浴面部で
溶融金属と雰囲気中に微量含まれる酸素又は水蒸気が直
接反応して生成する所謂浴面スカムが存在している。こ
れらの異物は、スナウト内めっき浴面上もしくはその上
部に浮遊し、めっき直前の鋼板に付着したり、鋼板の浴
中侵入に伴って鋼板近傍のめっき浴面は鋼板の侵入によ
り引き起こされた随伴流によりスナウト壁面から鋼板側
へ表面流れを生じて浴中に引き込まれて鋼板に付着す
る。その結果不めっきやスカム付着による押込疵等のめ
っき欠陥が生ずる。たとえこれらの大きな原因とならな
い場合であっても、次のような新たな問題を生ずる。[Function] During hot metal plating, iron powder carried from the furnace by a steel plate on the plating bath surface in the snout, fragments of refractory bricks in the annealing furnace, foreign substances such as powder, and the molten metal evaporated from the bath surface, Floating oxides generated by reaction with trace oxygen or water vapor in the atmosphere, and so-called bath surface scum generated by direct reaction between the molten metal and oxygen or water vapor contained in the atmosphere in the plating bath surface of the snout is doing. These foreign substances float on or above the plating bath surface in the snout and adhere to the steel sheet immediately before plating, or the plating bath surface near the steel sheet is caused by the penetration of the steel sheet as the steel sheet enters the bath. The flow causes a surface flow from the wall surface of the snout to the steel plate side, is drawn into the bath, and adheres to the steel plate. As a result, plating defects such as non-plating and indentation due to scum adhesion occur. Even if these are not the major causes, the following new problems arise.
【００１１】すなわち、特に浴面上に浮遊するスカムは
期間の経過とともに粒径が成長し大きくなり、そのもの
が鋼板浴中への侵入に伴って鋼板に付着した亜鉛めっき
鋼板が合金化処理される場合には鋼板に直接付着したス
カムが合金化処理されることによって、鋼板のＦｅが拡
散した時にスカムが付着している場合には亜鉛めっき層
への拡散を防止し、その結果外観不良を生ずるという新
たな問題を生じた。これらを解消するためにはスカムの
発生を防止すると共に、スカムの粗大化を防止する必要
があり、本発明の浴面被覆材によってスナウト内のめっ
き浴上を浴面被覆することにより、めっき浴面スカム発
生を防止するものである。That is, in particular, the scum floating on the bath surface grows in size and grows in size with the passage of time, and as it penetrates into the steel plate bath, the galvanized steel plate adhered to the steel plate is alloyed. In this case, the scum directly adhered to the steel plate is alloyed to prevent diffusion of the scum to the galvanized layer when Fe of the steel plate diffuses, resulting in poor appearance. That caused a new problem. In order to eliminate these, it is necessary to prevent the generation of scum and prevent coarsening of the scum. By coating the bath surface in the snout with the bath surface coating material of the present invention, the plating bath The surface scum is prevented from occurring.
【００１２】図１は上述した工程を経るものであるが、
このような工程において、スナウト内のめっき浴面上に
浴面被覆材を浮上させ、浴面を覆うことにある。すなわ
ち、本発明においてスナウト内のめっき浴面上に浴面被
覆材を浮上させ、浴面を覆うことにより、スナウト内で
の浴面での酸素との接触を遮断し、スカムの発生を防止
すると共に、例え発生した微少のスカムについても、め
っき浴面でスカムが大きく成長するのを防止することが
出来る。Although FIG. 1 shows the steps described above,
In such a step, the bath surface coating material is floated on the plating bath surface in the snout to cover the bath surface. That is, in the present invention, the bath surface coating material is floated on the plating bath surface in the snout, and by covering the bath surface, the contact with oxygen on the bath surface in the snout is blocked, and the generation of scum is prevented. At the same time, it is possible to prevent the scum from growing greatly on the surface of the plating bath even for the minute scum that has occurred.
【００１３】この浴面被覆材としては、溶融金属に対し
耐熱性及び耐蝕性を有するものを必要とし、例えばセラ
ミックス、耐熱性及び耐蝕性を有する金属であるステン
レスや金属へのサーメット被覆材及び耐熱樹脂等を使用
した中空状ないしは弁当箱形状等に成形したものを使用
する。また、浴面被覆材に溶融金属が凝着することか
ら、溶融金属凝着防止機能をもつ加熱機構を設けると良
いし、更には着脱機構を設け、取替えが容易に出来る構
成がされている。The bath surface coating material is required to have heat resistance and corrosion resistance to the molten metal. For example, ceramics, stainless steel which is a metal having heat resistance and corrosion resistance, and a cermet coating material for the metal and heat resistance. A hollow or bento box shape made of resin is used. Further, since molten metal adheres to the bath surface coating material, it is preferable to provide a heating mechanism having a function of preventing molten metal adhesion, and a detaching mechanism is provided to facilitate replacement.
【００１４】図２は本発明に係る他の実施例であるめっ
き工程を示す縦断面図である。図２は基本的には図１と
同じ装置であって、連続焼鈍炉から出た鋼板１がスナウ
ト２内を通ってめっき槽内のめっき浴３中に浸漬された
後ポットロール４を経てめっき浴３外へ引き出されるも
ので、この場合にスナウト浴内のめっき浴面被覆材５を
浮上させ、さらに浴面被覆材を開閉可能な開閉機構を設
けることにより、Ｚｎの蒸発を防止すると共に、鋼板１
の形状不良の際の浴面被覆材との接触の回避並びに浴面
状況を観察することを図るものである。図３は本発明に
係る浴面被覆材を設けた状態を示す断面図である。図３
に示すように、鋼板１の両端部のスナウト２内のめっき
浴面上に鋼板１を包囲するように浴面被覆材５が配設さ
れている。これによって浴面酸素との接触を遮断してス
カムの発生を防止するものである。FIG. 2 is a longitudinal sectional view showing a plating process which is another embodiment of the present invention. 2 is basically the same apparatus as in FIG. 1, in which a steel plate 1 discharged from a continuous annealing furnace passes through a snout 2 and is immersed in a plating bath 3 in a plating tank, and then plated via a pot roll 4. It is drawn out of the bath 3. In this case, by elevating the plating bath surface coating material 5 in the snout bath, and further by providing an opening / closing mechanism capable of opening and closing the bath surface coating material, Zn evaporation is prevented and Steel plate 1
It is intended to avoid contact with the bath surface coating material when the shape is defective and to observe the bath surface condition. FIG. 3 is a sectional view showing a state in which the bath surface coating material according to the present invention is provided. Figure 3
As shown in FIG. 1, the bath surface coating material 5 is arranged on the plating bath surfaces in the snouts 2 at both ends of the steel plate 1 so as to surround the steel plate 1. As a result, the contact with oxygen on the bath surface is blocked to prevent the generation of scum.
【００１５】[0015]
【実施例】図１に示す装置を用いて、０．８ｍｍ（厚
さ）×１２１９ｍｍ（幅）の鋼板をラインスピード８０
ｍｐｍにて通板し、Ｚｎ−０．１〜０．３％Ａｌ、浴温
４６０℃なる溶融亜鉛めっき浴に浸漬し、めっきした後
所定のめっき厚さに払拭した溶融亜鉛めっき鋼板を合金
化処理した後の表面外観を観察した。その結果は図４に
示す。図４は本発明及び比較例のスカム付着による表面
外観不良発生率を示すものである。図４に示すように、
浴面被覆材のない従来法と比較して本発明法を適用する
ことにより、スカム付着による表面外観不良の発生率を
大幅に低減させることが出来た。EXAMPLE A 0.8 mm (thickness) × 1219 mm (width) steel plate was used at a line speed of 80 by using the apparatus shown in FIG.
It is passed through the plate at mpm, dipped in a hot dip galvanizing bath with Zn-0.1 to 0.3% Al and a bath temperature of 460 ° C, plated, and then wiped to a predetermined plating thickness to form a galvanized steel sheet which is alloyed. The surface appearance after the treatment was observed. The result is shown in FIG. FIG. 4 shows the surface appearance defect occurrence rate due to scum adhesion in the present invention and the comparative example. As shown in FIG.
By applying the method of the present invention as compared with the conventional method having no bath surface coating material, it was possible to significantly reduce the incidence of surface appearance defects due to scum adhesion.
【００１６】[0016]
【発明の効果】以上述べたように、本発明によって、浴
面スカムの発生を防止することが出来、しかも例え微少
の発生があっても粒径が小さいために合金化するも表面
外観には全く異常が観察されない、表面外観の優れた溶
融亜鉛めっき鋼板を得ることが出来る優れた効果を奏す
るものである。As described above, according to the present invention, it is possible to prevent the generation of scum on the bath surface, and even if a slight amount is generated, it is alloyed because the grain size is small, but the surface appearance is It has the excellent effect of being able to obtain a hot-dip galvanized steel sheet having an excellent surface appearance in which no abnormalities are observed.
【図１】本発明に係るめっき工程を示す縦断面図、FIG. 1 is a vertical sectional view showing a plating process according to the present invention,
【図２】本発明に係る他の実施例であるめっき工程を示
す縦断面図、FIG. 2 is a vertical sectional view showing a plating process which is another embodiment of the present invention,
【図３】本発明に係る浴面被覆材を設けた状態を示す断
面図、FIG. 3 is a cross-sectional view showing a state in which a bath surface coating material according to the present invention is provided,
【図４】本発明及び比較例のスカム付着による表面外観
不良発生率を示す図である。FIG. 4 is a diagram showing a surface appearance defect occurrence rate due to scum adhesion in the present invention and a comparative example.
１ 鋼板 ２ スナウト ３ めっき浴 ４ ポットロール ５ 浴面被覆材 ６ 開閉機構 ７ ガスワイピングノズル 1 Steel plate 2 Snout 3 Plating bath 4 Pot roll 5 Bath surface coating 6 Opening / closing mechanism 7 Gas wiping nozzle
Claims (2)
っき浴に浸漬するスナウト内のめっき浴面上に浴面被覆
材を浮上させ、浴面を覆うことにより、浴面でのスカム
発生を防止することを特徴とする溶融金属めっき方法。1. A scum is prevented from occurring on the bath surface by floating a bath surface coating material on the plating bath surface in the snout where the steel plate is immersed in the plating bath at the snout portion of the molten metal plating and covering the bath surface. A method for hot dip metal plating, comprising:
っき浴に浸漬するスナウト内のめっき浴面上に開閉可能
な浴面被覆材を配設したことを特徴とする溶融金属めっ
き装置。2. A hot-dip metal plating apparatus, wherein an openable and closable bath surface coating material is provided on a plating bath surface in a snout in which a steel sheet is immersed in a plating bath in a hot metal plating snout portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29351793A JPH07145463A (en) | 1993-11-24 | 1993-11-24 | Method and device for hot dip metal coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29351793A JPH07145463A (en) | 1993-11-24 | 1993-11-24 | Method and device for hot dip metal coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07145463A true JPH07145463A (en) | 1995-06-06 |
Family
ID=17795768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29351793A Withdrawn JPH07145463A (en) | 1993-11-24 | 1993-11-24 | Method and device for hot dip metal coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07145463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1225245A1 (en) * | 2001-01-17 | 2002-07-24 | Recherche Et Developpement Du Groupe Cockerill Sambre | Process for preventing the entrainment of zinc particles on a galvanized sheet |
-
1993
- 1993-11-24 JP JP29351793A patent/JPH07145463A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1225245A1 (en) * | 2001-01-17 | 2002-07-24 | Recherche Et Developpement Du Groupe Cockerill Sambre | Process for preventing the entrainment of zinc particles on a galvanized sheet |
| WO2002057505A1 (en) * | 2001-01-17 | 2002-07-25 | Recherche Et Developpement Du Groupe Cockerill Sambre | Method for avoiding drag-in of zinc particles on galvanized sheet metal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4082868A (en) | Method for continuously contact-coating one side only of a ferrous base metal strip with a molten coating metal | |
| EP0172682A1 (en) | Process for controlling zinc vapor in a finishing process for a hot dip zinc based coating on a ferrous base metal strip | |
| JPH0688187A (en) | Production of alloyed galvannealed steel sheet | |
| SK5392003A3 (en) | Method and installation for dip coating of a metal strip, in particular a steel strip | |
| JPH07157853A (en) | Method for removing zinc fume in snout of hot dip metal coating and device therefor | |
| WO1999058735A2 (en) | Method of producing hot-dip zinc coated steel sheet free of dross pick-up defects on coating and associated apparatus | |
| JPH07150320A (en) | Hot dip metal coating method and device thereof | |
| JPH07145465A (en) | Hot dip metal coating method and device | |
| JPH07145463A (en) | Method and device for hot dip metal coating | |
| JPH0459955A (en) | Continuous hot dip galvanizing device | |
| JPH07145464A (en) | Method and device for hot dip metal coating | |
| US4352838A (en) | Dipless metallizing process | |
| JPH07113154A (en) | Method and device for hot-dipping | |
| JPH07150323A (en) | Device for preventing sticking of scum in snout for hot dip metal coating | |
| JPH07166311A (en) | Method and device for removing scum sticking to steel sheet surface in hot dip metal coating | |
| JPH07157854A (en) | Method for cleaning inside of snout of hot dip metal coating | |
| JPH07145461A (en) | Method and device for hot dip metal coating | |
| JPH07145462A (en) | Method and device for hot dip metal coating | |
| JPH07180014A (en) | Method for suppressing evaporation of zn from bath surface in snout for hot dip metal coating | |
| JPH07150321A (en) | Hot dip metal coating device | |
| JPH051357A (en) | Hot-dip metal coating method | |
| US4422403A (en) | Dipless metallizing apparatus | |
| JPH0688193A (en) | Production of galvannealed steel sheet | |
| JPH0617214A (en) | Top dross removing device for continuous hot-dipping bath | |
| JPH07150322A (en) | Hot dip metal coating method and device therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010130 |