JPH01279775A - Zn-ni alloy plated steel sheet and its production - Google Patents
Zn-ni alloy plated steel sheet and its productionInfo
- Publication number
- JPH01279775A JPH01279775A JP10713188A JP10713188A JPH01279775A JP H01279775 A JPH01279775 A JP H01279775A JP 10713188 A JP10713188 A JP 10713188A JP 10713188 A JP10713188 A JP 10713188A JP H01279775 A JPH01279775 A JP H01279775A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- steel sheet
- plating
- molten
- plated steel
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 82
- 239000010959 steel Substances 0.000 title claims abstract description 82
- 229910000990 Ni alloy Inorganic materials 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000956 alloy Substances 0.000 claims abstract description 67
- 238000007747 plating Methods 0.000 claims abstract description 54
- 229910007567 Zn-Ni Inorganic materials 0.000 claims abstract description 49
- 229910007614 Zn—Ni Inorganic materials 0.000 claims abstract description 49
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 38
- 238000002844 melting Methods 0.000 claims description 26
- 230000008018 melting Effects 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000000151 deposition Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 26
- 230000007797 corrosion Effects 0.000 abstract description 24
- 238000005260 corrosion Methods 0.000 abstract description 24
- 239000002184 metal Substances 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 239000007769 metal material Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- RZJQYRCNDBMIAG-UHFFFAOYSA-N [Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Zn].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn] Chemical class [Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Zn].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn] RZJQYRCNDBMIAG-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は溶融Ｚｎ −Ｎｉ合金めっき鋼板及び該めっき
鋼板を低コストで製造するための方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot-dip Zn-Ni alloy coated steel sheet and a method for producing the coated steel sheet at low cost.
近年、自動車を中心として高耐食性を有する防錆鋼板の
ニーズが益々強くなっている。亜鉛系めっき鋼板の場合
、めっき付着量を増大させることにより高耐食性が確保
できることが知られているが、めっき付着量をあまり増
大させると加工性（耐パウダリング性）、溶接性が劣化
するばかりでなく、スクラップ処理の問題も生じてくる
。こうした実情を背景として、従来より、薄めつきでも
優れた耐食性を有する合金電気めっき鋼板の開発が盛ん
に行われている。その中でもＺｎ −Ｎｉ合金めっき鋼
板は塗装性、耐食性等の諸性能に優れていることから、
自動車用防錆鋼板として広く使用されている。In recent years, there has been an increasing need for rust-proof steel sheets with high corrosion resistance, mainly for automobiles. In the case of zinc-based coated steel sheets, it is known that high corrosion resistance can be ensured by increasing the coating weight, but if the coating weight is increased too much, workability (powdering resistance) and weldability will deteriorate. Moreover, the problem of scrap disposal also arises. Against this background, development of alloy electroplated steel sheets that have excellent corrosion resistance even when thinned has been actively conducted. Among them, Zn-Ni alloy plated steel sheet has excellent properties such as paintability and corrosion resistance.
Widely used as a rust-proof steel plate for automobiles.
しかし、このＺｎ −Ｎｉ合金めっき鋼板は電気めっき
の電解効率が比較的低く、製造コストが高いという欠点
がある。最近共々高まっている高耐食性のニーズに応え
るためには、Ｚｎ −Ｎｉ合金めっきといえどもある程
度のめっき量を確保する必要があり、このようにめっき
量を確保しためっき鋼板は非常なコスト高となる。However, this Zn--Ni alloy plated steel sheet has the disadvantage that the electrolytic efficiency of electroplating is relatively low and the manufacturing cost is high. In order to meet the recently increasing needs for high corrosion resistance, it is necessary to secure a certain amount of plating even with Zn-Ni alloy plating, and plated steel sheets with such a certain amount of plating are extremely expensive. Become.
本発明はこのような従来の問題に鑑み、高度の耐食性を
有するＺｎ −Ｎｉ合金めっき鋼板及びこのようなめっ
き鋼板を低コストでしかも生産性良く製造することがで
きる方法を提供せんとするものである。In view of these conventional problems, it is an object of the present invention to provide a Zn-Ni alloy plated steel sheet having a high degree of corrosion resistance and a method for manufacturing such a plated steel sheet at low cost and with high productivity. be.
ｃ問題を解決するための手段〕
このため本発明のＺｎ−Ｎｉ合金めっき鋼板は、鋼板面
に、溶融Ｚｎ −Ｎｉ合金が凝固して形成されたＮｉ含
有率が３０ｖｔ％以下のＺｎ −Ｎｉ合金めっき皮膜を
有することをその特徴とする。Means for Solving Problem c] For this reason, the Zn-Ni alloy plated steel sheet of the present invention has a Zn-Ni alloy formed by solidifying molten Zn-Ni alloy and having a Ni content of 30 vt% or less on the steel plate surface. It is characterized by having a plating film.
また１本発明の第１の製造方法は、Ｎｉ含有率が３０ｗ
ｔ％以下のＺｎ −Ｎｉ合金材を、該合金の融点以上に
加熱され通板する鋼板に向け連続的に送給して鋼板との
接触により溶融させ、溶融したＺｎ −Ｎｉ合金を鋼板
表面にめっき皮膜として連続的に付着させることをその
特徴とする。Further, in the first manufacturing method of the present invention, the Ni content is 30w.
A Zn-Ni alloy material of t% or less is heated above the melting point of the alloy and is continuously fed toward the steel plate to be passed, melting it by contact with the steel plate, and applying the molten Zn-Ni alloy to the surface of the steel plate. Its feature is that it is applied continuously as a plating film.
また、本発明の第２の製造方法は、Ｎｉ含有率が３０ｗ
ｔ％以下のＺｎ −Ｎｉ合金材を、走行する鋼板に向け
連続的に送給し、該Ｚｎ −Ｎｉ合金材を鋼板に面した
加熱溶解装置により先端側から順次溶融させ、溶融した
Ｚｎ −Ｎｉ合金を鋼板表面にめっき皮膜として連続的
に付着させることを特徴とする。Further, in the second manufacturing method of the present invention, the Ni content is 30w.
t% or less of Zn-Ni alloy material is continuously fed toward a traveling steel plate, and the Zn-Ni alloy material is sequentially melted from the tip side using a heating melting device facing the steel plate, and the molten Zn-Ni It is characterized by continuously depositing the alloy on the surface of the steel plate as a plating film.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明のめっき鋼板は、その表面に溶融めっきによるＺ
ｎ−Ｎｉ合金めっき皮膜を有する。Ｚｎ −Ｎｉ合金の
融点は亜鉛に較べかなり高く、このような合金めっきを
従来のような溶融ポットを用いた方式で行うことは、浴
中ロールの溶融等の面からほとんど不可能であり、この
ため従来では溶融めっきによるＺｎ −Ｎｉ合金めっき
鋼板の性能について検討された例はほとんどない。The plated steel sheet of the present invention has Z on its surface by hot-dip plating.
Has an n-Ni alloy plating film. The melting point of the Zn-Ni alloy is considerably higher than that of zinc, and it is almost impossible to perform such alloy plating using the conventional method using a melting pot due to the melting of the rolls in the bath. Therefore, in the past, there have been almost no studies on the performance of Zn--Ni alloy coated steel sheets by hot-dipping.
これに対し、本発明者等はこのような高融点の合金でも
工業的に溶融めっきを実施することができる新たなめっ
き法を開発し、溶融Ｚｎ −Ｎｉ合金めっき鋼板の製造
を可能ならしめた。そして、このような溶融めっき鋼板
の性能を調べたところ、めっき付着量とＮｉ含有率が同
じ電着めつき鋼板に較べより高度の耐食性（裸耐食性及
び塗装後耐食性）を有することが判明した。この理由は
必ずしも明らかではないが、めっき後の冷却過程で表層
の亜鉛が一部蒸発してＮｉの富化した暦が形成され、こ
れが耐食性に対して有効に作用することによるものと推
定される。In response, the present inventors have developed a new plating method that allows industrial hot-dip plating even with such high-melting-point alloys, and have made it possible to manufacture hot-dip Zn-Ni alloy coated steel sheets. . When the performance of such a hot-dip plated steel sheet was investigated, it was found that it had a higher degree of corrosion resistance (bare corrosion resistance and post-coating corrosion resistance) compared to an electrodeposited steel sheet with the same coating weight and Ni content. The reason for this is not necessarily clear, but it is presumed that some of the zinc on the surface evaporates during the cooling process after plating, forming a Ni-enriched layer, which has an effective effect on corrosion resistance. .
めっき皮膜を構成する合金のＮｉ含有率は３０ｗｔ％を
その上限とする。Ｎｉ含有率が３０ｖｔ％を超えると、
合金材融点が高くなり過ぎるため適切な溶融状態を得る
ことが困難となる。また、Ｎｉ含有率が３０ｗｔ％を超
えても耐食性にはほとんど効果がなく、コスト的にも不
利となるばかりでなく、地鉄に対する犠牲防食効果が低
下し、赤錆が発生し易くなる傾向がある。なお、所定の
耐食性を確保するため、Ｎｉ含有率の下限は５ｗｔ％と
することが好ましい、このような本発明のめっき鋼板は
、上述したような性能上の利点に加え、電着による場合
に較べかなり低コストに製造することができる。The upper limit of the Ni content of the alloy constituting the plating film is 30 wt%. When the Ni content exceeds 30vt%,
Since the melting point of the alloy material becomes too high, it becomes difficult to obtain an appropriate molten state. Furthermore, even if the Ni content exceeds 30 wt%, it has almost no effect on corrosion resistance and is not only disadvantageous in terms of cost, but also tends to reduce the sacrificial corrosion protection effect on the steel base and make red rust more likely to occur. . In order to ensure a predetermined corrosion resistance, it is preferable that the lower limit of the Ni content is 5 wt%.In addition to the above-mentioned performance advantages, the plated steel sheet of the present invention has the following properties: It can be manufactured at a relatively low cost.
次に、本発明の製造方法を説明する。Next, the manufacturing method of the present invention will be explained.
本発明における製造法の１つは、Ｚｎ −Ｎｉ合金の融
点以上の温度に加熱され通板する鋼帯の表面に、めっき
金属材たるＺｎ −Ｎｉ合金材を連続的に送給し、該Ｚ
ｎ −Ｎｉ合金材を鋼帯に接触させることによって溶融
させ、溶融したＺｎ −Ｎｉ合金を通板する銅帯にめっ
き皮膜として連続的に付着させるようにする方法である
。One of the manufacturing methods in the present invention is to continuously feed a Zn-Ni alloy material, which is a plated metal material, onto the surface of a steel strip that is heated to a temperature higher than the melting point of the Zn-Ni alloy and is passed through.
In this method, an n-Ni alloy material is melted by contacting it with a steel strip, and the molten Zn-Ni alloy is continuously deposited as a plating film on the copper strip through which the sheet is passed.
また他の製造方法は、Ｚｎ −Ｎｉ合金材を通板する銅
帯の表面に向けて連続的に送給し、該Ｚｎ −Ｎｉ合金
材の先端側を、鋼帯に面した加熱溶解装置により鋼帯面
直前で順次溶融させ、溶融したＺｎ −Ｎｉ合金をめっ
き皮膜として鋼帯表面に連続的に付着させるようにする
方法である。In another manufacturing method, a Zn-Ni alloy material is continuously fed toward the surface of a copper strip through which the sheet is passed, and the tip side of the Zn-Ni alloy material is heated and melted by a heating melting device facing the steel strip. This is a method in which the Zn--Ni alloy is sequentially melted just before the surface of the steel strip, and the molten Zn--Ni alloy is continuously adhered to the surface of the steel strip as a plating film.
これらの方法はいずれも、固相のＺｎ −Ｎｉ合金材を
鋼帯方向に送給して、これを鋼帯の顕熟成いは鋼帯に面
して設けられた溶解装置により、鋼帯面上またはその近
傍でめっき目付分だけ溶融させ、この溶融金属をめっき
金属としして付着させるものであり、溶融金属浴を全く
必要としないため、溶融金属浴を使用する場合のような
製造上の制約が全くなく、したがってＺｎ −Ｎｉ合金
を効率的に実施することができる。しかも固体のめっき
金属材の送給速度のコントロールにより、めっき付着量
のコントロールも高精度に行うことができる利点がある
。In all of these methods, a solid Zn-Ni alloy material is fed in the direction of the steel strip, and it is heated to the surface of the steel strip by means of a temperature-strengthening device or a melting device installed facing the steel strip. This method melts just the amount of plating on or near the surface and deposits this molten metal as plating metal, and does not require a molten metal bath at all. There are no constraints and therefore Zn--Ni alloys can be implemented efficiently. Moreover, by controlling the feeding speed of the solid plated metal material, there is an advantage that the amount of plating deposited can be controlled with high precision.
第１図ないし第３図は、上述しためっき法のうち、Ｚｎ
−Ｎｉ合金材を銅帯と接触させることによって溶融させ
る方法を示したものである。なお、以下に説明する各実
施例は、鋼帯（１）の両面にＺｎ −Ｎｉ合金材（２）
を供給して両面めっきを行うようにしたものであるが、
第１図及び第２図、第４図及び第５図については便宜上
１片面のめっき状況のみを示した。Figures 1 to 3 show Zn plating methods among the above-mentioned plating methods.
This figure shows a method of melting a -Ni alloy material by bringing it into contact with a copper strip. In addition, in each of the examples described below, Zn-Ni alloy material (2) is coated on both sides of the steel strip (1).
It was designed to perform double-sided plating by supplying
For convenience, FIGS. 1, 2, 4, and 5 only show the plating situation on one side.
この方法では、めっき金属の融点以上の温度に加熱され
通板する鋼帯（１）に、めっき金属材供給装置（５）に
よりＮｉ含有率が３（ｈｔ％以下の板状のＺｎ −Ｎｉ
合金材（２）を送給し、該Ｚｎ −Ｎｉ合金材（２）を
鋼帯（１）に接触させることにより溶融させ、溶融した
Ｚｎ −Ｎｉ合金（３）を通板する鋼帯（１）の表面に
めっき皮膜（４）として連続的に付着させるようにする
。In this method, a plate-shaped Zn-Ni plate with a Ni content of 3 (ht% or less) is added to a steel strip (1) heated to a temperature equal to or higher than the melting point of the plated metal and passed through the plated metal material supply device (5).
The alloy material (2) is fed, the Zn-Ni alloy material (2) is melted by contacting the steel strip (1), and the steel strip (1) is passed through the melted Zn-Ni alloy (3). ) as a plating film (4).
めっき金属材供給装置（５）は、Ｚｎ −Ｎｉ合金材を
所定の供給速度で鋼帯面方向に送給するための送りロー
ラ（６）（ピンチローラ）と、Ｚｎ −Ｎｉ合金材の予
熱装置（７）とを備えている。Ｚｎ−Ｎｘ合金材（２）
はホルダー（８）内に多数セットされ、送給シリンダ（
９） （９’ ）によって自動的に送りローラ（６）に
噛み込むように送られる。そして、Ｚｎ−Ｎｉ合金材（
２）は、めっきに消費される量に見合った量だけ、送り
ローラ（６）によって鋼帯表面に送られる。The plated metal material supply device (5) includes a feed roller (6) (pinch roller) for feeding the Zn-Ni alloy material in the direction of the steel strip surface at a predetermined supply speed, and a preheating device for the Zn-Ni alloy material. (7). Zn-Nx alloy material (2)
are set in a large number in the holder (8), and the feeding cylinder (
9) (9') automatically feeds the feed roller (6). And Zn-Ni alloy material (
2) is sent to the surface of the steel strip by the feed roller (6) in an amount commensurate with the amount consumed for plating.
なお、上記予熱装置（７）によるＺｎ−Ｎｉ合金材の予
熱はその溶融を確実にするために行われるもので、必ず
しも必須のものではない。しかし、本発明法によりめっ
き皮膜厚を安定して得るには、Ｚｎ −Ｎｉ合金材が鋼
帯の持つ顕熱により溶解して生じた溶融層（３）の厚み
がある程度確保される必要がある。そして、使用するＺ
ｎ −Ｎｉ合金材に対して鋼帯（１）の顕熱が相対的に
低いと、溶融層（３）の形成が充分ではなく、安定した
膜厚の確保が難しくなるとともに、Ｚｎ −Ｎｉ合金材
（２）と鋼帯（１）の固体接触が著しくなり、鋼帯破損
の原因となる。そこで、このような問題を生じる可能性
がある場合にＺｎ−Ｎｉ合金材（２）を予熱し、これを
鋼帯（１）に対して供給するものであり、これによりＺ
ｎ −Ｎｉ合金材の溶融を促進させることができる。Note that the preheating of the Zn-Ni alloy material by the preheating device (7) is performed to ensure its melting, and is not necessarily essential. However, in order to obtain a stable plating film thickness by the method of the present invention, it is necessary to ensure a certain thickness of the molten layer (3) formed by melting the Zn-Ni alloy material by the sensible heat of the steel strip. . And use Z
If the sensible heat of the steel strip (1) is relatively low compared to the Zn-Ni alloy material, the formation of the molten layer (3) will not be sufficient and it will be difficult to ensure a stable film thickness. Solid contact between the material (2) and the steel strip (1) becomes significant, causing damage to the steel strip. Therefore, when there is a possibility that such a problem may occur, the Zn-Ni alloy material (2) is preheated and supplied to the steel strip (1).
Melting of the n-Ni alloy material can be promoted.
また、形成されためっき皮膜（４）は、鋼帯の振動に起
因して若干の付着量むらを生じる場合があり、このむら
を均一化させるため、めっき処理部の下流側で表面調整
装置（１０）により均一化処理が行われる。この表面調
整装置（１０）は、本実施例では超音波振動子（１１）
を備えたもの（所謂、超音波ゴテ）が用いられる。この
装置は緩衝機構を有するシリンダ装置（図示せず）等に
より保持され、その振動板がめつき皮膜が形成された銅
帯表面に軽く接触せしめられ、めっき皮膜に超音波振動
を付加することにより、めっき皮膜厚を均一化する。In addition, the formed plating film (4) may have slight uneven coating amount due to the vibration of the steel strip, so in order to equalize this unevenness, a surface conditioning device ( 10), the equalization process is performed. In this embodiment, this surface conditioning device (10) is an ultrasonic vibrator (11).
(so-called ultrasonic iron) is used. This device is held by a cylinder device (not shown) having a buffer mechanism, and its diaphragm is brought into light contact with the surface of the copper strip on which the plating film is formed, and by applying ultrasonic vibration to the plating film, Make the plating film thickness uniform.
なお、その地図面において、（１２）は鋼帯の加熱装置
である。In addition, in the map, (12) is a heating device for the steel strip.
第４図ないし第６図は、Ｚｎ −Ｎｉ合金材（２）の先
端側を溶解装置により順次溶融させるようにした方法を
示したものである。4 to 6 show a method in which the distal end side of the Zn--Ni alloy material (2) is sequentially melted using a melting device.
この方法では、鋼帯通板ラインに面した加熱溶解装置（
１４）を有するめっき金属供給装置（５′）にＺｎ −
Ｎ３合金材（２）を連続的に装入し、該Ｚｎ−Ｎｎ−Ｎ
相合金材の先端側を加熱溶解装置（１４）により順次溶
融させ、溶融したＺｎ−Ｎｉ合金（３）をめっき皮膜（
４）として通板する鋼帯（１）に連続的に付着させるも
のである。In this method, a heating melting device (
14) Zn −
The N3 alloy material (2) is continuously charged, and the Zn-Nn-N
The tip side of the phase alloy material is sequentially melted using a heating melting device (14), and the molten Zn-Ni alloy (3) is coated with a plating film (
As 4), it is continuously attached to the steel strip (1) to be passed.
上記めっき金属供給装置（５′）は、前記実施例と同様
の送りローラ（６’）、 Ｚｎ−Ｎｉ合金材の予熱装置
（１３）及び加熱溶解装置（１４）を備えている。The plated metal supply device (5') is equipped with a feed roller (6'), a Zn--Ni alloy preheating device (13), and a heating melting device (14) similar to those in the previous embodiment.
加熱溶解装置（１４）は、第４図に示すように周胴部に
加熱体（１５）（加熱ヒータ等）を有する筒体であって
、一端側にノズル（１６）が形成され、そのノズル口（
１６０）を通板する鋼帯面に近接させるようにして配置
されている。予熱装置（１３）で予熱されたＺｎ −Ｎ
ｉ合全余材２）は、他端側の開口から加熱溶解装置（１
４）に送り込まれ、その先端側から順次溶解せしめられ
、これによる溶融Ｚｎ−Ｎｉ合金（３）はノズル（１６
）から銅帯面に供給され、めっき皮膜（４）が形成され
る。As shown in FIG. 4, the heating melting device (14) is a cylindrical body having a heating body (15) (heater, etc.) on the circumferential body, and a nozzle (16) is formed at one end, and the nozzle opening (
160) is placed close to the surface of the steel strip through which the plate is passed. Zn-N preheated by preheating device (13)
The remaining material 2) is heated and melted through the heating melting device (1) from the opening at the other end.
The molten Zn-Ni alloy (3) is fed into the nozzle (16) and sequentially melted from the tip side.
) is supplied to the copper strip surface to form a plating film (4).
なお、このめっき法では、鋼帯（１）を常温のままでめ
っき処理することもできるが、溶融金属の急激な凝固に
よる板形状不良の発生等を防止するため、鋼帯（１）を
加熱装置（１７）で加熱し、この鋼帯（１）にめっきを
行うようにすることが好ましい、また、この予熱温度は
特に限定はないが、Ｚｎ −Ｎｉ合全余材２）の融点以
上の予熱温度とすることが特に好ましい。Note that with this plating method, the steel strip (1) can be plated at room temperature, but in order to prevent sheet shape defects due to rapid solidification of the molten metal, the steel strip (1) is heated. It is preferable that the steel strip (1) is plated by heating with the device (17).Also, the preheating temperature is not particularly limited, but is preferably higher than the melting point of the Zn-Ni composite material 2). Preheating temperature is particularly preferred.
また、本実施例ではめっき金属供給装置（５′）に装入
されるＺｎ −Ｎｉ合全余材２）は板状のものであるが
、このＺｎ −Ｎｕ合全余材例えば粉体のものであって
もよい。In addition, in this embodiment, the Zn-Ni composite material 2) charged into the plating metal supply device (5') is in the form of a plate, but this Zn-Nu composite material, for example, powder. It may be.
本発明のめっき法は、鋼帯（１）を水平方向以外に走行
させて行うことも可能であり、例えば垂直方向に走行さ
せる形式とすることができる。The plating method of the present invention can also be carried out by running the steel strip (1) in a direction other than horizontally, for example in a vertical direction.
そして、この垂直ラインの場合、走行方向け上下のいず
れの方向でもよい。In the case of this vertical line, it may be in any direction, up or down in the direction of travel.
また、本発明法によれば片面めっき及び両面めっきのい
ずれのめっき鋼板も容易に得ることができる。また、本
発明法により鋼帯両面めっきを行う場合、その各めっき
は必ずしもライン方向の同じ位置で行う必要はない。Moreover, according to the method of the present invention, both single-sided and double-sided plated steel sheets can be easily obtained. Further, when double-sided plating of a steel strip is performed by the method of the present invention, each plating does not necessarily have to be performed at the same position in the line direction.
また、本発明法におけるめっき処理は、めっきの濡れ性
、密着性を確保するため、非酸化性雰囲気（例えば、Ｈ
，：２０〜２５％、Ｎ２：８０〜７５％の混合ガス）中
で行うことが好ましい。また本発明法においても、めっ
き前の銅帯表面はなるべく清浄化されていることが好ま
しい。In addition, the plating treatment in the method of the present invention is performed in a non-oxidizing atmosphere (for example, H
, N2: 20 to 25% and N2: 80 to 75%). Also in the method of the present invention, it is preferable that the surface of the copper strip be as clean as possible before plating.
本発明法により第１表に示すようなＺｎ −Ｎｉ合金め
っき鋼板を製造した。得られためっき鋼板の耐食性、製
造コストの評価を従来の電着Ｚｎ −Ｎｉ合金めっき鋼
板等と比較して第１表に示した。Zn--Ni alloy plated steel sheets as shown in Table 1 were manufactured by the method of the present invention. Evaluations of the corrosion resistance and manufacturing cost of the obtained plated steel sheets are shown in Table 1 in comparison with conventional electrodeposited Zn--Ni alloy plated steel sheets.
本実施例において、塗装後ｍ食性として、討ブリスター
性、耐孔あき性及びチッピング後の耐食性を評価した。In this example, as corrosion resistance after coating, anti-blistering property, pitting resistance, and corrosion resistance after chipping were evaluated.
耐ブリスター性は浸漬タイプのりん酸塩処理、カチオン
電着塗装２０μｍを施した試験片にクロスカットを入れ
たのち、塩水噴霧試験を行い、所定時間後にブリスター
発生程度を評価した。Blister resistance was determined by making a cross cut on a test piece that had been subjected to dipping type phosphate treatment and cationic electrodeposition coating with a thickness of 20 μm, followed by a salt spray test, and after a predetermined period of time, the degree of blistering was evaluated.
耐孔あき性は耐ブリスター性試験材と同様に作成した試
験片を複合サイクル試験で腐食させ。Puncture resistance was determined by corroding a test piece prepared in the same way as the blister resistance test material in a combined cycle test.
塗膜、腐食生成物を除去したのち、下地鋼板の腐食深さ
を測定することにより評価した。After removing the paint film and corrosion products, evaluation was made by measuring the corrosion depth of the underlying steel plate.
車体外板の外面側はチッピングにより塗膜損傷を受ける
と、そこを起点とした腐食が進行する。これを想定して
、３コート塗装を施した試験片に対しグラベロメーター
でチッピングを行い塗膜を傷つけたのち、塩水噴霧試験
により耐食性を試験した。When the paint film on the outer surface of a car body is damaged by chipping, corrosion progresses starting from that point. Assuming this, a test piece coated with three coats was chipped with a gravelometer to damage the paint film, and then the corrosion resistance was tested using a salt spray test.
以上述べた本発明によれば、従来の電着Ｚｎ −Ｎｉ合
金めっき鋼板に較べ、より高度の耐食性を得ることがで
きる。また、本発明法によれば、このような高度の耐食
性を有するＺｎ−Ｎｉ合金めっき鋼板を低コストに且つ
生産性良く製造することができる。According to the present invention described above, higher corrosion resistance can be obtained compared to conventional electrodeposited Zn-Ni alloy plated steel sheets. Further, according to the method of the present invention, a Zn-Ni alloy plated steel sheet having such high corrosion resistance can be manufactured at low cost and with high productivity.
また、このような利点に加え、固体のめっき金属材を被
めっき鋼帯方向に送給して銅帯面またはその近傍でめっ
き目付分だけ溶融させ、これを鋼帯に付着させる方式で
あるため、めっき付着量を固体のめっき金属材の送給速
度によりコントロールでき、このため高度の付着量精度
を確保することができる。In addition to these advantages, the method uses a method in which a solid plated metal material is fed in the direction of the steel strip to be plated, melts the coating weight at or near the surface of the copper strip, and adheres it to the steel strip. The amount of plating deposited can be controlled by the feeding speed of the solid plated metal material, and therefore a high degree of accuracy in the amount of plating can be ensured.
第１図ないし第３図は本発明の一実施状況を示すもので
、第１図はめっき原理を示す模式図、第２図はめっき状
況を示す斜視説明図、第３図は全体説明図である。第４
図ないし第６図は本発明の他の実施状況を示すもので、
第４図はめっき原理を示す模式図、第５図はめっき状況
を示す斜視説明図、第６図は全体説明図である。
図において、（１）は鋼帯、（２）はＺｎ−Ｎｉ合金材
、（３）は溶融！、（４）はめっき皮膜、（５）はめっ
き金属材供給装置、（５′）はめっき金属供給装置、（
６） （６”）は送りローラ、（７）は予熱装置、（１
４）は加熱溶解装置である。
第１図
第２図
第３図
第４図
第 ５ 図Figures 1 to 3 show a state of implementation of the present invention. Figure 1 is a schematic diagram showing the plating principle, Figure 2 is a perspective explanatory diagram showing the plating situation, and Figure 3 is an overall explanatory diagram. be. Fourth
Figures to Figures 6 show other implementation situations of the present invention,
FIG. 4 is a schematic diagram showing the plating principle, FIG. 5 is a perspective explanatory diagram showing the plating situation, and FIG. 6 is an overall explanatory diagram. In the figure, (1) is a steel strip, (2) is a Zn-Ni alloy material, and (3) is a molten! , (4) is a plating film, (5) is a plating metal material supply device, (5') is a plating metal supply device, (
6) (6”) is the feed roller, (7) is the preheating device, (1
4) is a heating melting device. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5
Claims (3)
れたＮｉ含有率が３０ｗｔ％以下のＺｎ−Ｎｉ合金めっ
き皮膜を有するＺｎ−Ｎｉ合金めっき鋼板。(1) A Zn-Ni alloy plated steel sheet having a Zn-Ni alloy plating film with a Ni content of 30 wt% or less formed by solidifying a molten Zn-Ni alloy on the steel sheet surface.
を、該合金の融点以上に加熱され通板する鋼板に向け連
続的に送給して鋼板との接触により溶融させ、溶融した
Ｚｎ−Ｎｉ合金を鋼板表面にめっき皮膜として連続的に
付着させることを特徴とするＺｎ−Ｎｉ合金めっき鋼板
の製造方法。(2) A Zn-Ni alloy material with a Ni content of 30 wt% or less is continuously fed to a steel plate heated above the melting point of the alloy and melted by contact with the steel plate, and the molten Zn - A method for producing a Zn--Ni alloy plated steel sheet, which comprises continuously depositing a Ni alloy as a plating film on the surface of the steel sheet.
を、走行する鋼板に向け連続的に送給し、該Ｚｎ−Ｎｉ
合金材を鋼板に面した加熱溶解装置により先端側から順
次溶融させ、溶融したＺｎ−Ｎｉ合金を鋼板表面にめっ
き皮膜として連続的に付着させることを特徴とするＺｎ
−Ｎｉ合金めっき鋼板の製造方法。(3) Continuously feed a Zn-Ni alloy material with a Ni content of 30 wt% or less toward a traveling steel plate, and
Zn characterized by sequentially melting the alloy material from the tip side using a heating melting device facing the steel plate, and continuously depositing the molten Zn-Ni alloy on the surface of the steel plate as a plating film.
- A method for producing a Ni alloy plated steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10713188A JPH01279775A (en) | 1988-04-28 | 1988-04-28 | Zn-ni alloy plated steel sheet and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10713188A JPH01279775A (en) | 1988-04-28 | 1988-04-28 | Zn-ni alloy plated steel sheet and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01279775A true JPH01279775A (en) | 1989-11-10 |
Family
ID=14451290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10713188A Pending JPH01279775A (en) | 1988-04-28 | 1988-04-28 | Zn-ni alloy plated steel sheet and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01279775A (en) |
-
1988
- 1988-04-28 JP JP10713188A patent/JPH01279775A/en active Pending
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