JPH02228494A - Production of zinc alloy electroplated steel sheet - Google Patents
Production of zinc alloy electroplated steel sheetInfo
- Publication number
- JPH02228494A JPH02228494A JP5082289A JP5082289A JPH02228494A JP H02228494 A JPH02228494 A JP H02228494A JP 5082289 A JP5082289 A JP 5082289A JP 5082289 A JP5082289 A JP 5082289A JP H02228494 A JPH02228494 A JP H02228494A
- Authority
- JP
- Japan
- Prior art keywords
- strip
- plating
- divided
- flow
- insoluble anode
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 229910001297 Zn alloy Inorganic materials 0.000 title abstract 2
- 238000007747 plating Methods 0.000 claims abstract description 80
- 239000000956 alloy Substances 0.000 claims abstract description 24
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000011701 zinc Substances 0.000 claims description 18
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052725 zinc Inorganic materials 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 13
- 229910000640 Fe alloy Inorganic materials 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 2
- 229960001763 zinc sulfate Drugs 0.000 description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 description 2
- 229910007567 Zn-Ni Inorganic materials 0.000 description 1
- 229910007614 Zn—Ni Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は、亜鉛系合金電気めっき鋼板の製造方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a zinc-based alloy electroplated steel sheet.
［従来の技術］
Ｚｎ −Ｆｅ等亜鉛系合金電気めっき鋼板は、耐食性を
はじめ、塗装性、加工性および溶接性等価れた諸特性を
有しているため、自動車、家電および建材等の防錆鋼板
として広く使用されている。これらの合金めっき鋼板の
皮膜組成は、めっき陰極界面の物質移動に強く依存する
ため、最適合金組成保持には、めっき条件の厳密な管理
を特徴とする特にめっき槽（電解槽）内のめっきのスト
リップ界面近傍での流動状態が変動すると、得られる合
全組成の変動をきたし、性能低下にいたる。[Prior art] Zn-Fe and other zinc-based alloy electroplated steel sheets have various properties such as corrosion resistance, paintability, workability, and weldability, so they can be used as rust prevention for automobiles, home appliances, building materials, etc. Widely used as steel plate. The film composition of these alloy-plated steel sheets strongly depends on the mass transfer at the plating cathode interface, so maintaining the optimum alloy composition requires strict control of the plating conditions, especially in the plating bath (electrolytic bath). Fluctuations in the flow state near the strip interface cause variations in the resulting total composition, leading to performance deterioration.
一方、近年、めっきの生産性を高めるための様々なめっ
き装置が考案されている。例えば、特公昭６１−２２０
４０号公報および特開昭６１−１９００９４号公報にお
いては、流体クツションを用いた電解槽が提案されてい
る。この装置は、電極とストリップとの間に静圧を形成
し、ストリップを極間中央に復元する力を持たせるもの
で、これにより電極間距離を短縮できる特徴をもってい
る。On the other hand, in recent years, various plating apparatuses have been devised to improve plating productivity. For example, Tokuko Sho 61-220
40 and Japanese Patent Laid-Open No. 61-190094, an electrolytic cell using a fluid cushion is proposed. This device creates static pressure between the electrodes and the strip, giving it a force to restore the strip to the center between the electrodes, and has the feature of shortening the distance between the electrodes.
また、特公昭６２−１５６３８号公報においては、縦型
めっきセルにおいて、重力を利用してめっき液を電極上
部よりストリップと陽極との間に供給するもので、この
ときストリップと陽極との間にめっき液を完成するため
、不溶性陽極の使用が不可欠であるが、パスラインが安
定し、極間距離が短縮でき、片面めっき時に、非めっき
面がめつき液に接触することがない利点を持つ。Furthermore, in Japanese Patent Publication No. 62-15638, in a vertical plating cell, the plating solution is supplied between the strip and the anode from above the electrode using gravity; Although it is essential to use an insoluble anode to complete the plating solution, it has the advantage that the pass line is stable, the distance between the electrodes can be shortened, and the non-plated surface does not come into contact with the plating solution when plating one side.
特公昭６１−２２０４０号公報および特開昭６１−１９
００９４号公報においては、めっき液の噴流を電極中央
部より吐出しているため、ストリップ進行方向と同方向
の流れｃ以下「順流」という）と、反対方向の流れ（以
下「対向流」という）の両方が存在する。即ち、１つの
電解槽に順流と対向流とが混在する。また。Japanese Patent Publication No. 61-22040 and Japanese Patent Publication No. 61-19
In Publication No. 0094, since a jet of plating solution is discharged from the center of the electrode, there is a flow in the same direction as the strip traveling direction (hereinafter referred to as "forward flow") and a flow in the opposite direction (hereinafter referred to as "counterflow"). Both exist. That is, a forward flow and a counterflow coexist in one electrolytic cell. Also.
特公昭６２−１５６３８号公報でも同様である。即ち。The same applies to Japanese Patent Publication No. 62-15638. That is.
重力を利用しているため、流れは上部から下部に向かっ
てしか存在しない。また、縦型めっき装置であるから、
上から下に向かうダウンバスと、下から上に向かうアッ
プバスが存在する。従って、１つの電解槽に順流と対向
流とが存在する。Because gravity is used, flow only exists from the top to the bottom. In addition, since it is a vertical plating device,
There are down buses that go from top to bottom and up buses that go from bottom to top. Therefore, a forward flow and a counterflow exist in one electrolytic cell.
上述した順流と対向流とが混在するめっき装置での合金
めっき鋼板の製造は難しく、特に亜鉛系の合金めっきの
ように、合金組成が流速により変動するものは、特に顕
著である。これらのめっき装置での流速依存のある合金
めっき鋼板の製造のためには、ストリップ走行速度の変
化に伴ない。It is difficult to manufacture alloy-plated steel sheets using the above-mentioned plating equipment in which forward flow and counterflow flow coexist, and this is particularly noticeable when the alloy composition fluctuates depending on the flow rate, such as zinc-based alloy plating. In order to produce alloy-plated steel sheets that depend on the flow rate in these plating apparatuses, the strip running speed changes.
順流側および対向流側の流速を自由に変動させることが
必要である。It is necessary to freely vary the flow velocity on the upstream and countercurrent sides.
しかしながら、前述した特公昭６１−２２０４０号公報
および特開昭６１−１９００９４号公報に開示された技
術は、電極とストリップとの間に静圧が形成し、ストリ
ップを極間中央に復元する力を持たせるもので、これに
より電極間距離が短縮するのが主目的であり、順流側お
よび対向流側の流速を自由に変動させることはできない
ため、製造範囲が限定される欠点を持っている。However, in the techniques disclosed in Japanese Patent Publication No. 61-22040 and Japanese Patent Application Laid-open No. 61-190094, static pressure is formed between the electrode and the strip, and a force that restores the strip to the center between the electrodes is generated. The main purpose of this method is to shorten the distance between the electrodes, and because the flow velocity on the forward and counterflow sides cannot be freely varied, the manufacturing range is limited.
また、特公昭６２−１５６３８号公報においては１重面
抵抗、めっき液物性等によって一義的に決まってしまう
ため、前述した発明と同様、順流側および対向流側の流
速を自由に変動させることができない欠点を持つ。さら
に１本装置は、不溶性陽極の使用が不可欠であるために
、前記陽極から発生するガスの迅速除去をしなければな
らないにもかかわらず、噴流方向とガスの上昇方向が異
なるた゛め、陽極とストリップとの間にガスが滞留し、
その部分は電気抵抗が高いため電流が流れなくなり、不
めっきになったり、周囲の局部電流密度の上昇により合
金組成の不均一化、めっきヤケを引き起こしたりする。In addition, in Japanese Patent Publication No. 62-15638, since it is uniquely determined by the single surface resistance, the physical properties of the plating solution, etc., it is not possible to freely vary the flow velocity on the forward flow side and the counterflow side, as in the above-mentioned invention. have the disadvantage of not being able to Furthermore, since this device requires the use of an insoluble anode, the gas generated from the anode must be quickly removed, but since the direction of the jet and the direction of gas rise are different, the anode and strip Gas remains between the
Because the electrical resistance is high in that part, current will no longer flow, resulting in unplated surfaces, or an increase in the local current density in the surrounding area, which may cause uneven alloy composition and discoloration of the plating.
特に、順流側ではストリ・ツブの移動方向も電解気泡の
上昇方向と逆であるため、ストリップからの陰極ガスま
でも滞留し、高ライン速度域で品質が悪化する。In particular, on the downstream side, the moving direction of the strip and tube is also opposite to the rising direction of the electrolytic bubbles, so even the cathode gas from the strip stays, resulting in poor quality in the high line speed range.
［発明が解決しようとする課題］
上述した問題を解決する電気めっき装置として、順流お
よび対向流が混在する第１図、第５図乃至第７図に示す
装置が使用される。第１図は水平型めっき装置、第５図
、第６図は縦型めっき装置、第７図はラジアル型めっき
装置である。第１図。[Problems to be Solved by the Invention] As an electroplating apparatus that solves the above-mentioned problems, the apparatuses shown in FIGS. 1, 5 to 7, in which forward flow and counterflow flow coexist, are used. FIG. 1 shows a horizontal plating device, FIGS. 5 and 6 show a vertical plating device, and FIG. 7 shows a radial plating device. Figure 1.
第５図〜第７図に示すめっき装置は、いずれも順流およ
び対向流が混在するため、コンダクタロール５と不溶性
陽極４との間の距離が短縮できるため、ストリップ３の
金属抵抗による電圧ロスを小さくできるメリットを持っ
ている。従って、このような省エネルギーに適した、順
流および対向流が混在するめっき装置においての、亜鉛
系合金めっき鋼板の製造方法の確立が望まれている。In the plating apparatus shown in FIGS. 5 to 7, forward flow and counterflow flow coexist, so the distance between the conductor roll 5 and the insoluble anode 4 can be shortened, so voltage loss due to the metal resistance of the strip 3 can be reduced. It has the advantage of being small. Therefore, it is desired to establish a method for manufacturing zinc-based alloy coated steel sheets in a plating apparatus that uses both forward flow and counter flow, which is suitable for such energy saving.
この発明の目的は、上述した順流および対向流が混在す
るめっき装置において、均一な、そして所望合金組成の
皮膜を有する亜鉛系合金電気めっ［課題を解決するため
の手段］
発明者らは、上述の問題を解決すべく鋭意研究を重ねた
。その結果、以下に述べる知見を得た。The object of the present invention is to provide a zinc-based alloy electroplating film having a uniform film having a desired alloy composition in the above-mentioned plating apparatus in which forward flow and counter flow are mixed [Means for Solving the Problem] The inventors We have conducted extensive research to solve the above problems. As a result, we obtained the knowledge described below.
即ち、不溶性陽極を分割し、めっき液の順流および対向
流の流速、および、ストリップの移動速度に応じて、分
割した不溶性陽極の各々の電極長を調整することによっ
て、ガスの迅速な除去を達成し、均一なそして所望合金
組成のめっき皮膜が得られる。That is, rapid gas removal is achieved by dividing the insoluble anode and adjusting the electrode length of each divided insoluble anode according to the forward and countercurrent flow rates of the plating solution and the moving speed of the strip. As a result, a uniform plating film having a desired alloy composition can be obtained.
この発明は上述の知見に基いてなされたものであり、め
っき液が供給されているめっき槽内に不溶性陽極を複数
配置し、ストリップを連続的に移動し、一方の前記不溶
性陽極と前記ストリップとの間に、前記めっき液を、前
記ストリップの移動方向と同一方向に流し、他方の前記
不溶性陽極と前記ストリップとの間に、前記めっき液を
前記ストリップの移動方向と対向する方向に流し、かく
して前記ストリップの表面をめっきしてなる亜鉛系合金
電気めっき鋼板の製造方法において、前記一方の不溶性
陽極をそのまま、または、複数に分割し、前記他方の不
溶性陽極を複数に分割し、そして、そのままのまたは分
割した前記不溶性陽極の各々の電極長Ｌｘ（ｍ）を、
Ｌｘ（ｍ）≦０．５６・Ｕｓ ｍｉｎ但し、Ｕｓｍｉ
ｎニストリップ移動速度の下限値、
の範囲に限定したことに特徴を有するものである。This invention was made based on the above-mentioned findings, and consists of arranging a plurality of insoluble anodes in a plating tank to which a plating solution is supplied, moving the strips continuously, and connecting one of the insoluble anodes with the strip. During this step, the plating solution is flowed in the same direction as the moving direction of the strip, and the plating solution is flowed between the other insoluble anode and the strip in a direction opposite to the moving direction of the strip. In the method for producing a zinc-based alloy electroplated steel sheet by plating the surface of the strip, one of the insoluble anodes is used as is or is divided into a plurality of parts, the other insoluble anode is divided into a plurality of parts, and the other insoluble anode is divided into a plurality of parts, and Or, the electrode length Lx (m) of each of the divided insoluble anodes, Lx (m)≦0.56・Us min However, Usmi
The lower limit of the moving speed of the n-strip is limited to the following range.
次に、この発明を図面を参照しながら説明する。Next, the present invention will be explained with reference to the drawings.
第１図は、この発明の製造方法の一実施態様を示す水平
型めっき装置の断面図である。第１図において、１は水
平型めっき装置、２はめっき槽、３は被めっき材のスト
リップ、 ４．４’ 、４ａ、４ａ’は不溶性陽極、５
はコンダクタロール、６はバックアップロール、７はめ
っき液、８はダムロール、９はサポートロールおよび１
０は噴流ヘッダである。図面において矢印は、ストリッ
プ３の移動方向を示す。第１図に示すように、不溶性陽
極４と４’ 、４ａと４ａ’ とは、ストリップ３の上
側および下側に対向して設けられている。ストリップ３
は不溶性陽極４と４’ 、４ａと４ａ’間を矢印に示す
方向に移動する。第２図は分割された不溶性陽極４の平
面図、第３図は断面図である。第２図、第３図に示すよ
うに、不溶性陽極４の放電面１１は複数に分割されてい
る。めっき槽２の中央部に設けられたサポートロール９
の上流側には、入側の不溶性陽極４，４′にめっき液を
吐出するための第１噴流ヘッダ１０ａ、１０ａが、サポ
ートロール９の下流側には、出側の不溶性陽ｉ４ａ、４
ａにめっき液を吐出するための第２噴流ヘツダ１０ｂ。FIG. 1 is a sectional view of a horizontal plating apparatus showing an embodiment of the manufacturing method of the present invention. In Figure 1, 1 is a horizontal plating device, 2 is a plating tank, 3 is a strip of material to be plated, 4.4', 4a, 4a' are insoluble anodes, 5
is a conductor roll, 6 is a backup roll, 7 is a plating solution, 8 is a dumb roll, 9 is a support roll and 1
0 is a jet header. In the drawing the arrow indicates the direction of movement of the strip 3. As shown in FIG. 1, insoluble anodes 4 and 4', 4a and 4a' are provided oppositely on the upper and lower sides of the strip 3. strip 3
moves between insoluble anodes 4 and 4', 4a and 4a' in the direction shown by the arrow. FIG. 2 is a plan view of the divided insoluble anode 4, and FIG. 3 is a cross-sectional view. As shown in FIGS. 2 and 3, the discharge surface 11 of the insoluble anode 4 is divided into a plurality of parts. Support roll 9 provided in the center of plating tank 2
On the upstream side of the support roll 9, there are first jet flow headers 10a, 10a for discharging the plating solution to the insoluble anodes 4, 4' on the inlet side, and on the downstream side of the support roll 9, the insoluble anodes i4a, 4' on the outlet side.
a second jet header 10b for discharging plating solution to a.
１０ｂが、それぞれ設けられている。 ストリップ３が
矢印の方向に移動し、不溶性陽極４，４′および４ａ、
４ａ と、ストリップ３とが形成する極間に対し、
第１噴流ヘッダ１０ａ、１０ａからはストリップ３の移
動方向と対向する対向流が、第２噴流ヘッダ１０ｂ、１
０ｂからはストリップ３の移動方向と同じ方向のｌ１ｌ
ｉ流が、それぞれ吐出される。10b are provided respectively. The strip 3 moves in the direction of the arrow and the insoluble anodes 4, 4' and 4a,
4a and the pole gap formed by the strip 3,
A counterflow opposite to the moving direction of the strip 3 flows from the first jet headers 10a, 10a to the second jet headers 10b, 1.
From 0b, l1l in the same direction as the moving direction of strip 3
i streams are respectively discharged.
本発明において、順流と対向流とが混在するめっき装置
によって、第４図（ａ）、（ｂ）に示す従来の不溶性陽
極を複数に分割し、分割した不溶性陽極の１電極長Ｌｘ
（ｍ）を、ストリップの移動速度を下限値（製造下限ス
トリップ走行速度） Ｕｓ ＋ｎ１ｎ（Ｕｓミニマム）
（ｍ／５ｅｅ）によって移動したとき、
Ｌｘ（ｍ）≦０．５６−Ｕｓ ｍｉｎ
の範囲に限定した理由を以下で説明する。In the present invention, a conventional insoluble anode shown in FIGS. 4(a) and 4(b) is divided into a plurality of parts using a plating apparatus in which forward flow and counterflow flow coexist, and one electrode length Lx of the divided insoluble anode is
(m), the strip moving speed is the lower limit value (manufacturing lower limit strip running speed) Us +n1n (Us minimum)
(m/5ee), the reason for limiting the range to Lx(m)≦0.56−Us min will be explained below.
例えば、Ｚｎ −Ｆｅ合金電気めっき鋼板を例に挙げて
説明する。ストリップの表面に形成されるＺｎ−Ｆｅ合
金めっきでは、めっき皮膜の性能は、皮膜中のＦｅ含有
量に依存し、最適Ｆｅ含有量は１０〜２゜ｗｔ、％とさ
れている。Ｆｅ含有量が１０ｗｔ、％未満では、Ｚｎと
似た性質を持ち、Ｆｅを含有した効果が薄く、ブリスタ
ーの発生が早く、Ｚｎめっきに比べて塗装後耐食性の向
上が見られない。一方Ｆｅ含有量が２０υｔ０％を超え
ると、犠牲防食性が劣化し、対赤錆び性など耐食性に劣
るものとなる、従って、Ｆｅ含有量は１０〜２０ｗｔ、
％の範囲内が好ましい。この範囲内にＦｅ含有量を限定
するためにはめっき条件を厳密に管理しなければならな
い。For example, a Zn-Fe alloy electroplated steel sheet will be described as an example. In Zn-Fe alloy plating formed on the surface of a strip, the performance of the plating film depends on the Fe content in the film, and the optimum Fe content is said to be 10 to 2 wt.%. If the Fe content is less than 10 wt.%, it has properties similar to Zn, the effect of containing Fe is weak, blistering occurs quickly, and no improvement in corrosion resistance after painting is seen compared to Zn plating. On the other hand, if the Fe content exceeds 20wt0%, the sacrificial corrosion resistance will deteriorate and the corrosion resistance such as red rust resistance will be poor. Therefore, the Fe content should be 10~20wt,
It is preferably within the range of %. In order to limit the Fe content within this range, plating conditions must be strictly controlled.
一方、このＺｎ −Ｆｅ合金めっきの合金組成は、流速
等のめっき条件、すなわち、陰極界面の物質移動に強く
依存し、高流速はど拡散律速下のＺｎの供給が進み、Ｆ
ｅ含有量が低下する。On the other hand, the alloy composition of this Zn-Fe alloy plating strongly depends on plating conditions such as flow rate, that is, mass transfer at the cathode interface.
e content decreases.
Ｌｘ（ｍ）が、Ｌｘ≦０．５６Ｕｓ ｍｉｎであるとき
（ストリップ走行速度が早い場合および電極長が短かい
場合）は、陰極での拡散層が成長段階であり薄いため、
前述したＺｎ −Ｆｅ合金めっきの場合において、拡散
律速下にあるＺｎの供給が進み、皮膜中のＦｅ含有量は
低下する。また、めっき液の流速を高流速化することに
よっても同等の効果が得られる。この領域では、十分に
物質移動が高められているので、合金組成の流速依存性
および通電時間依存性が少なくなる。従って、めっき液
噴流の流速の範囲は限定する必要はなく、順流側および
対向流側での合金組成変動が少なく、順流および対向流
の混在するめっき装置によって亜鉛系合金めっき鋼板の
製造が可能となる。When Lx (m) is Lx≦0.56Us min (when the strip running speed is fast and the electrode length is short), the diffusion layer at the cathode is in the growth stage and is thin;
In the case of the Zn--Fe alloy plating described above, the supply of Zn under diffusion control progresses, and the Fe content in the film decreases. The same effect can also be obtained by increasing the flow rate of the plating solution. In this region, the mass transfer is sufficiently enhanced, so that the dependence of the alloy composition on the flow rate and on the current application time is reduced. Therefore, there is no need to limit the flow velocity range of the plating solution jet, and there is little variation in alloy composition on the forward and counterflow sides, making it possible to manufacture zinc-based alloy coated steel sheets using plating equipment that uses both forward and counterflow. Become.
以上の理由により、上述した条件を満足させるために、
不溶性陽極を第２図、第３図に示すように複数に分割し
、 １電極当りの通電時間を０．５６秒以下になるよう
に制御することにより、順流および対向流の混在するめ
つき装置での、最適な合金組成を有する亜鉛系合金めっ
き鋼板の製造が容易に可能となった。For the above reasons, in order to satisfy the above conditions,
By dividing the insoluble anode into multiple parts as shown in Figures 2 and 3 and controlling the energization time per electrode to 0.56 seconds or less, it is possible to use a plating device that uses both forward flow and counter flow. It has now become possible to easily manufacture zinc-based alloy coated steel sheets with the optimum alloy composition.
以上は、Ｚｎ −Ｆｅ合金めっきを例に挙げて説明した
が、 Ｚｎ−Ｎｉ系など亜鉛系合金めっき全般に広く適
用することができる。Although the above explanation has been given using Zn-Fe alloy plating as an example, the present invention can be widely applied to general zinc-based alloy plating such as Zn-Ni.
第５図、第６図はこの発明の製造方法の他の実施態様を
示す縦型めっき装置の段面図、第７図はラジアル型めっ
き装置の断面図、第８図はその１つの不溶性陽極を示す
断面図である。第５図において１２は縦型めっき槽、１
３はジンクロール、第６図において１２は縦型めっき装
置、１４はボトムロール、第６図において、１０ｃは噴
流ヘッダ、第７図において１５はメインロールである。5 and 6 are step-up views of a vertical plating device showing other embodiments of the manufacturing method of the present invention, FIG. 7 is a sectional view of a radial plating device, and FIG. 8 is one of the insoluble anodes. FIG. In Fig. 5, 12 is a vertical plating tank;
3 is a zinc roll, 12 is a vertical plating device in FIG. 6, 14 is a bottom roll, 10c is a jet header in FIG. 6, and 15 is a main roll in FIG.
［実施例］
次に、この発明を実施例によって、更に詳しく説明する
。[Examples] Next, the present invention will be explained in more detail with reference to Examples.
第１図に示す水平型めっき装Ｗ１を用いて＋ Ｚｎ−Ｆ
ｅ合金めっき鋼板を、電極を分割した不溶性陽極によっ
ておよびストリップ移動速度を種々変化させることによ
り、１電極当りの通電時間を変えて、および、めっき液
の流速を種々変化させて、順流側および対向流側、各々
独立にめっきを施して製造した。なお、分割したのは順
流側の不溶性陽極のみであった。そして、得られたＺｎ
−Ｆｅ合金めっき鋼板の皮膜中のＦｅ含有量を測定し
、第１表に示した。比較例として順流側も分割されてい
ない不溶性陽極を使用して製造した結果を第２表に示し
た。そして、許容範囲において均一なめっき皮膜を有す
る合金めっき鋼板が製造されたかどうかを調べた。第１
表、第２表において、「Ｏ」印は順流側と対向流側のＦ
ｅ含有量のバラツキが１５％±５％以内である場合を示
し、「×」印はバラツキが１５％±５％以内にならない
場合を示す。+ Zn-F using horizontal plating system W1 shown in Fig. 1
The e-alloy plated steel sheet is coated on the upstream and opposite sides by using an insoluble anode with divided electrodes, varying the strip moving speed, varying the energization time per electrode, and varying the flow rate of the plating solution. The downstream side was manufactured by plating each separately. Note that only the insoluble anode on the upstream side was divided. And the obtained Zn
-The Fe content in the coating of the Fe alloy plated steel sheet was measured and shown in Table 1. As a comparative example, Table 2 shows the results of manufacturing using an insoluble anode that was not divided on the downstream side. Then, it was investigated whether an alloy-plated steel sheet having a uniform plating film within an allowable range was manufactured. 1st
In the table and Table 2, the "O" mark indicates F on the upstream side and counterflow side.
A case where the variation in e content is within 15%±5% is shown, and an "x" mark indicates a case where the variation is not within 15%±5%.
なお、めっき条件は、以下の通りであった。Note that the plating conditions were as follows.
（１）めっき浴組成 第１浴 硫酸第１鉄：３２５ｇ／Ｑ、 硫酸亜鉛：１７５ｇ／Ｑ、 硫酸ソーダ：６０ ｇ／Ｑ、 第２浴 硫酸第１鉄：２７５ｇ／Ｉｌｌ、 硫酸亜鉛：２２５ｇ／Ｒ５ 硫酸ソーダ：６０ｇ／Ｑ。(1) Plating bath composition 1st bath Ferrous sulfate: 325g/Q, Zinc sulfate: 175g/Q, Sodium sulfate: 60 g/Q, 2nd bath Ferrous sulfate: 275g/Ill, Zinc sulfate: 225g/R5 Sodium sulfate: 60g/Q.
（２） ＰＨ＝ １．５
第１表、第２表から明らかなように、本発明の製造方法
により製造されためっき鋼板は、Ｆｅ含有量のバラツキ
が少なく、均一な皮膜を有していた。(2) PH = 1.5 As is clear from Tables 1 and 2, the plated steel sheet manufactured by the manufacturing method of the present invention had a uniform film with little variation in Fe content. .
これに対して、本発明外の製造方法により製造されため
っき鋼板は、Ｆｅ含有量のバラツキが大きがった・
［発明の効果］
以上説明したように、この発明によれば、順流および対
向流が混在するめっき装置において、均一な、そして所
望合金組成の皮膜を有する亜鉛系合金電気めっき鋼板が
得られる。産業上有用な効果がもたらされる。On the other hand, plated steel sheets manufactured by manufacturing methods other than the present invention had large variations in Fe content. [Effects of the Invention] As explained above, according to the present invention, In a plating apparatus with mixed flows, a zinc-based alloy electroplated steel sheet having a uniform coating with a desired alloy composition is obtained. Industrially useful effects are produced.
第１図はこの発明の製造方法の一実施態様を示す水平型
めっき装置の断面図、第２図は分割された不溶性陽極の
平面図、第３図は断面図、第４図（、）は従来の分割さ
れていない不溶性陽極の平面図、第４図（ｂ）は断面図
、第５図および第６図は縦型めっき装置の断面図、第７
図はラジアル型めっき装置の断面図、第８図はその１つ
の不溶性陽極を示す断面図である。図面において、１・
・・水平型めっき装置。
２・・・めっき槽、
３・・・ストリップ、
４．４’ 、４ａ、４ａ’ 、４４・・・不溶性陽極、
５・・・コンダクタロール、
６・・・バックアップロール、
７・・・めっき液、
８・・・ダムロール、
９・・・サポートロール、
１０、ｌＯａ、１０ｂ、１０ｃ・−・噴流ヘッダ、１１
・・・放電面、
１２・・・縦型めっき装置、
１３・・・ジンクロール。
１４・・・ボトムロール、
１５・・・メインロール。Fig. 1 is a sectional view of a horizontal plating apparatus showing an embodiment of the manufacturing method of the present invention, Fig. 2 is a plan view of a divided insoluble anode, Fig. 3 is a sectional view, and Fig. 4 (,) is a sectional view of a horizontal plating apparatus. FIG. 4(b) is a plan view of a conventional undivided insoluble anode, FIG. 4(b) is a sectional view, FIGS. 5 and 6 are sectional views of a vertical plating apparatus, and FIG.
The figure is a cross-sectional view of a radial plating apparatus, and FIG. 8 is a cross-sectional view showing one of the insoluble anodes. In the drawing, 1.
・Horizontal plating equipment. 2... Plating tank, 3... Strip, 4.4', 4a, 4a', 44... Insoluble anode,
5... Conductor roll, 6... Backup roll, 7... Plating solution, 8... Dam roll, 9... Support roll, 10, lOa, 10b, 10c... Jet header, 11
...discharge surface, 12...vertical plating device, 13...zinc roll. 14...Bottom roll, 15...Main roll.
Claims (1)
を複数配置し、ストリップを連続的に移動し、一方の前
記不溶性陽極と前記ストリップとの間に、前記めっき液
を、前記ストリップの移動方向と同一方向に流し、他方
の前記不溶性陽極と前記ストリップとの間に、前記めっ
き液を前記ストリップの移動方向と対向する方向に流し
、かくして前記ストリップの表面をめっきしてなる亜鉛
系合金電気めっき鋼板の製造方法において、前記一方の
不溶性陽極をそのまま、または、複数に分割し、前記他
方の不溶性陽極を複数に分割し、そして、そのままのま
たは分割した前記不溶性陽極の各々の電極長Ｌｘ（ｍ）
を、 Ｌｘ（ｍ）≦０．５６Ｕｓｍｉｎ 但し、Ｕｓｍｉｎ：ストリップ移動速度の下限値、 の範囲に限定したことを特徴とする亜鉛系合金電気めっ
き鋼板の製造方法。[Scope of Claims] 1 A plurality of insoluble anodes are arranged in a plating tank to which a plating solution is supplied, a strip is continuously moved, and the plating solution is placed between one of the insoluble anodes and the strip. , flowing in the same direction as the moving direction of the strip, and flowing the plating solution in a direction opposite to the moving direction of the strip between the other insoluble anode and the strip, thus plating the surface of the strip. In the method for producing a zinc-based alloy electroplated steel sheet, one of the insoluble anodes is used as it is or is divided into a plurality of parts, the other insoluble anode is divided into a plurality of parts, and each of the insoluble anodes is left as is or is divided into a plurality of parts. Electrode length Lx (m)
A method for producing a zinc-based alloy electroplated steel sheet, characterized in that Lx (m)≦0.56Usmin, where Usmin: lower limit of strip moving speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1050822A JPH0660433B2 (en) | 1989-03-02 | 1989-03-02 | Method for producing zinc-based alloy electroplated steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1050822A JPH0660433B2 (en) | 1989-03-02 | 1989-03-02 | Method for producing zinc-based alloy electroplated steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02228494A true JPH02228494A (en) | 1990-09-11 |
| JPH0660433B2 JPH0660433B2 (en) | 1994-08-10 |
Family
ID=12869457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1050822A Expired - Lifetime JPH0660433B2 (en) | 1989-03-02 | 1989-03-02 | Method for producing zinc-based alloy electroplated steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0660433B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015503027A (en) * | 2011-11-15 | 2015-01-29 | ポスコ | Horizontal electroforming apparatus for manufacturing high-speed metal foil and manufacturing method |
| JP2017014540A (en) * | 2015-06-26 | 2017-01-19 | 住友金属鉱山株式会社 | Insoluble anode, plating device, electroplating method and method for producing copper-clad laminated plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723090A (en) * | 1980-07-15 | 1982-02-06 | Nippon Steel Weld Prod & Eng Co Ltd | Electroplating method for horizontally laid loop-shaped wire material |
| JPS58174592A (en) * | 1982-04-02 | 1983-10-13 | Nippon Kokan Kk <Nkk> | Preparation of steel plate electoplated with fe-zn alloy having different kind of composition |
| JPS61204394A (en) * | 1985-03-06 | 1986-09-10 | Kobe Steel Ltd | Method for electrolyzing metallic wire rod |
| JPS63274794A (en) * | 1987-05-01 | 1988-11-11 | Oki Electric Ind Co Ltd | Method for electroplating dielectric core |
| JPS63293200A (en) * | 1987-05-27 | 1988-11-30 | Nkk Corp | Electroplating method |
-
1989
- 1989-03-02 JP JP1050822A patent/JPH0660433B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723090A (en) * | 1980-07-15 | 1982-02-06 | Nippon Steel Weld Prod & Eng Co Ltd | Electroplating method for horizontally laid loop-shaped wire material |
| JPS58174592A (en) * | 1982-04-02 | 1983-10-13 | Nippon Kokan Kk <Nkk> | Preparation of steel plate electoplated with fe-zn alloy having different kind of composition |
| JPS61204394A (en) * | 1985-03-06 | 1986-09-10 | Kobe Steel Ltd | Method for electrolyzing metallic wire rod |
| JPS63274794A (en) * | 1987-05-01 | 1988-11-11 | Oki Electric Ind Co Ltd | Method for electroplating dielectric core |
| JPS63293200A (en) * | 1987-05-27 | 1988-11-30 | Nkk Corp | Electroplating method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015503027A (en) * | 2011-11-15 | 2015-01-29 | ポスコ | Horizontal electroforming apparatus for manufacturing high-speed metal foil and manufacturing method |
| JP2017014540A (en) * | 2015-06-26 | 2017-01-19 | 住友金属鉱山株式会社 | Insoluble anode, plating device, electroplating method and method for producing copper-clad laminated plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0660433B2 (en) | 1994-08-10 |
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