JPH04236754A - Production of zn-al alloy plated steel wire - Google Patents
Production of zn-al alloy plated steel wireInfo
- Publication number
- JPH04236754A JPH04236754A JP1680091A JP1680091A JPH04236754A JP H04236754 A JPH04236754 A JP H04236754A JP 1680091 A JP1680091 A JP 1680091A JP 1680091 A JP1680091 A JP 1680091A JP H04236754 A JPH04236754 A JP H04236754A
- Authority
- JP
- Japan
- Prior art keywords
- molten
- alloy
- plating
- layer
- steel wire
- 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 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 title description 5
- 238000007747 plating Methods 0.000 claims abstract description 61
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 50
- 239000000956 alloy Substances 0.000 claims abstract description 50
- 229910007570 Zn-Al Inorganic materials 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 abstract description 22
- 230000007547 defect Effects 0.000 abstract description 7
- 229910000851 Alloy steel Inorganic materials 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 239000011701 zinc Substances 0.000 description 25
- 230000007797 corrosion Effects 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 12
- 230000004907 flux Effects 0.000 description 12
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 6
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 6
- 229910000640 Fe alloy Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000005074 zinc chloride Nutrition 0.000 description 3
- 239000011592 zinc chloride Substances 0.000 description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 229910018085 Al-F Inorganic materials 0.000 description 1
- 229910018179 Al—F Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910001122 Mischmetal Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- -1 chlorine ions Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007716 flux method Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、フラックス法によるＺ
ｎ−Ａｌ合金めっき鋼線の製造方法に関するものである
。[Industrial Application Field] The present invention is directed to Z
The present invention relates to a method for manufacturing n-Al alloy plated steel wire.
【０００２】0002
【従来の技術】鉄鋼材料の耐食性の向上を目的として、
多くのＺｎをベースとする合金めっき技術が開発されて
いる。たとえば、特公昭５５−２６７０２号公報にはＺ
ｎ−Ａｌ、特公昭５４−３３２２３号公報にはＺｎ−Ａ
ｌ−Ｍｇ、特公平０１−２４２２１号公報にはＺｎ−Ａ
ｌ−ミッシュメタル、特開昭５６−１１２４５２号公報
にはＺｎ−Ａｌ−Ｎａなどが公表されている。これらは
、いずれも溶融状態の合金めっき浴中に鋼材を浸漬する
ことにより、鋼材表面に浴組成と同じ合金めっき層を付
着せしめる方法である。[Prior Art] For the purpose of improving the corrosion resistance of steel materials,
Many Zn-based alloy plating techniques have been developed. For example, in Japanese Patent Publication No. 55-26702, Z
n-Al, Zn-A in Japanese Patent Publication No. 54-33223
l-Mg, and Zn-A in Japanese Patent Publication No. 01-24221.
L-misch metal, Zn-Al-Na, etc. are disclosed in Japanese Patent Application Laid-Open No. 112452/1983. In both of these methods, a steel material is immersed in a molten alloy plating bath to deposit an alloy plating layer having the same composition as the bath onto the surface of the steel material.
【０００３】鋼線の溶融めっき技術の特徴は、めっきの
前処理として、酸化還元法は採用せずフラックス法を採
用していることである。たとえば、溶融Ｚｎめっきの場
合には、酸洗後の鋼線を塩化アンモニウムや塩化亜鉛を
含む水溶液中に浸漬したのち乾燥する方法で前処理し、
これを連続的に溶融Ｚｎ浴中に浸漬する方法でめっきが
なされる。しかし、Ｚｎめっき浴にＡｌが含まれる場合
には、フラックス中の塩素イオンとＡｌの反応により生
成した塩化アルミニウムの一部が鋼線表面に付着し、そ
の部分が不めっきとなるため、上記のフラックスは使用
できない。したがって、鋼線にＺｎ−Ａｌ系合金めっき
を施す場合には、新たな前処理技術を開発する必要があ
る。[0003] A feature of the hot-dip plating technology for steel wire is that, as a pretreatment for plating, a flux method is used instead of an oxidation-reduction method. For example, in the case of hot-dip Zn plating, the steel wire after pickling is pretreated by immersing it in an aqueous solution containing ammonium chloride or zinc chloride and then drying it.
Plating is performed by continuously immersing this in a molten Zn bath. However, if the Zn plating bath contains Al, some of the aluminum chloride produced by the reaction between chlorine ions in the flux and Al will adhere to the surface of the steel wire, leaving that part unplated. Flux cannot be used. Therefore, when applying Zn-Al alloy plating to steel wire, it is necessary to develop a new pretreatment technique.
【０００４】これに対して、従来、 特開昭５８−１３
６７５９号公報に示されているように、合金めっき専用
のフラックスの開発が行なわれている。一方、特公平１
−５４４２８号公報に開示されているように、一次めっ
きとして０．１〜０．２％のＡｌを含むＺｎ浴中で通常
の溶融Ｚｎめっきを施した後、これを目的とする合金め
っき浴に浸漬する方法（２浴法）も開発されている。
さらに、特公昭４６−７１６１号公報には、酸化還元法
によるＺｎ−Ａｌ合金めっき法が開示されている。[0004] On the other hand, conventionally
As shown in Japanese Patent No. 6759, a flux specifically for alloy plating has been developed. On the other hand, Tokuho 1
As disclosed in Japanese Patent No. 54428, after performing normal hot-dip Zn plating in a Zn bath containing 0.1 to 0.2% Al as primary plating, it is applied to an alloy plating bath for the purpose. A dipping method (two-bath method) has also been developed.
Further, Japanese Patent Publication No. 46-7161 discloses a Zn-Al alloy plating method using an oxidation-reduction method.
【０００５】[0005]
【発明が解決しようとする課題】合金めっき用に開発さ
れたフラックスは、一般に分解温度が高い。このため、
めっき浴中での分解を促進するために、めっき浴温度を
上げ、通線速度を下げる必要がある。これには、めっき
槽材料の耐熱性を高める必要があり、さらには、生産性
の低下をともなう。また、フラックスの分解生成物の一
部が鋼線表面に付着して残り、この部分が不めっきとな
るため、良好なめっき肌が得にくい。[Problems to be Solved by the Invention] Fluxes developed for alloy plating generally have a high decomposition temperature. For this reason,
In order to promote decomposition in the plating bath, it is necessary to raise the plating bath temperature and lower the wire passing speed. This requires increasing the heat resistance of the plating tank material, and is also accompanied by a decrease in productivity. Further, a part of the decomposition products of the flux remains attached to the surface of the steel wire, and this part becomes unplated, making it difficult to obtain a good plating surface.
【０００６】上記特公平１−５４４２８号公報に開示さ
れているような、 ２浴法で合金めっきを行なうには、
１次めっき段階でのＦｅ−Ｚｎ合金層の発達を抑制する
ために、Ｚｎ浴中に０．１〜０．２％のＡｌを添加する
必要がある。しかし、Ｚｎ浴中のＡｌは鋼線と反応しや
すく、また、大気酸化の影響をうけるため、浴組成は変
動しやすい。このため、Ａｌ不足による過大な厚みの合
金層の生成、 あるいは、逆にＡｌ過多に起因する不め
っきなどの表面欠陥が発生しやすい。[0006] In order to perform alloy plating by the two-bath method as disclosed in the above-mentioned Japanese Patent Publication No. 1-54428,
In order to suppress the development of the Fe-Zn alloy layer during the primary plating stage, it is necessary to add 0.1 to 0.2% Al to the Zn bath. However, since Al in the Zn bath easily reacts with steel wire and is also affected by atmospheric oxidation, the bath composition tends to fluctuate. For this reason, an excessively thick alloy layer is likely to be formed due to a lack of Al, or, conversely, surface defects such as unplated surfaces are likely to occur due to an excess of Al.
【０００７】酸化還元法を採用した場合、これまで述べ
たような問題は回避される。 しかし、酸化還元法では
、鋼線は７００℃以上の高温にさらされる。これは、低
炭素鋼線では問題ないが、高炭素鋼線では著しい強度低
下をまねく。このため、酸化還元法は一般的なめっき法
とはなりえない。[0007] When the redox method is adopted, the problems described above are avoided. However, in the redox method, the steel wire is exposed to high temperatures of 700°C or higher. Although this is not a problem for low carbon steel wires, it causes a significant decrease in strength for high carbon steel wires. For this reason, the redox method cannot be used as a general plating method.
【０００８】以上述べたように、従来の合金めっき技術
では、不めっきなどのめっき欠陥がなく、かつ、表面平
滑性に優れたＺｎ−Ａｌ合金めっき鋼線を製造すること
は不可能であった。本発明の目的は、上記従来法の問題
点を解決し、表面肌がより一層良好なＺｎ−Ａｌ合金め
っき鋼線の製造方法を提供することである。[0008] As described above, with conventional alloy plating technology, it has been impossible to produce Zn-Al alloy plated steel wire that is free from plating defects such as non-plating and has excellent surface smoothness. . An object of the present invention is to solve the problems of the conventional methods described above and to provide a method for producing a Zn-Al alloy plated steel wire with an even better surface texture.
【０００９】[0009]
【課題を解決するための手段】本発明は、めっき槽下部
に溶融Ｐｂ層、 該溶融Ｐｂ層上の入線部に溶融Ｚｎ層
、出線部に重量比でＡｌを２〜１２％含有する溶融Ｚｎ
−Ａｌ合金層を形成させ、鋼線を溶融Ｚｎ、溶融Ｐｂ、
溶融Ｚｎ−Ａｌ合金の順序で該溶融金属層を連続的に通
過させめっきすることを特徴とするＺｎ−Ａｌ合金めっ
き鋼線の製造方法である。[Means for Solving the Problems] The present invention provides a molten Pb layer in the lower part of the plating tank, a molten Zn layer in the inlet part on the molten Pb layer, and a molten Zn layer containing 2 to 12% Al by weight in the outgoing part. Zn
-Al alloy layer is formed, and the steel wire is molten Zn, molten Pb,
This is a method for producing a Zn-Al alloy plated steel wire, characterized in that the molten Zn-Al alloy is plated by passing the molten metal layer continuously in this order.
【００１０】0010
【作用】以下に、本発明を詳細に説明する。脱脂、酸洗
後の鋼線を、 通常の溶融Ｚｎめっきの場合のフラック
ス処理と同様、塩化アンモニウムや塩化亜鉛を含む水溶
液中に浸漬したのち乾燥し、合金めっき槽で連続的にめ
っきを行なう。入線部は溶融Ｚｎ層であるので合金めっ
き用のフラックスを使用する必要は無く、このため、フ
ラックスの未分解等に起因するめっき欠陥は発生しない
。[Operation] The present invention will be explained in detail below. The steel wire after degreasing and pickling is immersed in an aqueous solution containing ammonium chloride or zinc chloride, dried, and then continuously plated in an alloy plating bath, similar to the flux treatment for normal hot-dip Zn plating. Since the wire entry portion is a molten Zn layer, there is no need to use flux for alloy plating, and therefore, plating defects due to undecomposed flux, etc. do not occur.
【００１１】合金めっき槽内には、下部に４００〜５０
０℃の溶融Ｐｂ層、これに接する上部の入線部には４４
０〜５００℃の溶融Ｚｎ層、出線部には４００〜５００
℃の溶融Ｚｎ−Ａｌ合金層が形成されている。[0011] Inside the alloy plating tank, there are 400 to 50
The molten Pb layer at 0°C, the upper wire entry part in contact with this is 44
Melted Zn layer at 0~500℃, 400~500℃ on the outgoing wire part
℃ molten Zn-Al alloy layer is formed.
【００１２】鋼線は、はじめに溶融Ｚｎ層を通過中にＺ
ｎと反応し、その表面にはＺｎ−Ｆｅ合金層（固相）が
形成される。Ｚｎ−Ｆｅ合金層厚みの制御はＺｎ浴温度
および鋼線の走行速度の制御により行なう。次いで、
下部の溶融Ｐｂ層に進入するが、その際、Ｚｎは絞りと
られるため、鋼線はその表面をＺｎ−Ｆｅ合金層のみに
より被覆された状態で通過し、溶融Ｚｎ−Ａｌ合金層に
入る。このような絞り機構の存在は、Ｚｎ−Ａｌ合金浴
層にＺｎが持ち込まれることによる合金浴組成の変動を
防止する効果を有す。溶融Ｐｂ層通過中、鋼線とＰｂの
反応はないが、溶融Ｐｂにより鋼線温度は次の合金めっ
きに必要な温度に調整される。[0012] While the steel wire first passes through the molten Zn layer, the Zn
reacts with n to form a Zn-Fe alloy layer (solid phase) on its surface. The Zn--Fe alloy layer thickness is controlled by controlling the Zn bath temperature and the running speed of the steel wire. Then,
When entering the lower molten Pb layer, the Zn is squeezed out, so the steel wire passes through with its surface covered only by the Zn--Fe alloy layer, and enters the molten Zn--Al alloy layer. The presence of such a throttling mechanism has the effect of preventing fluctuations in the alloy bath composition due to Zn being brought into the Zn-Al alloy bath layer. While passing through the molten Pb layer, there is no reaction between the steel wire and Pb, but the molten Pb adjusts the steel wire temperature to the temperature required for the next alloy plating.
【００１３】溶融Ｚｎ−Ａｌ合金層を通過中、鋼線表面
のＺｎ−Ｆｅ合金層（固相）はＺｎ−Ａｌ合金のＡｌと
反応し、耐食性ならびに加工性に優れたＺｎ−Ａｌ−Ｆ
ｅ金属間化合物層が形成される。溶融Ｚｎ−Ａｌ合金層
を出た鋼線は、冷却されたのち巻き取られる。この際、
溶融Ｚｎ−Ａｌ合金層温度と鋼線の走行速度に応じてめ
っき付着量が決定される。たとえば、上記、 Ｚｎ−Ａ
ｌ−Ｆｅ金属間化合物層上にＺｎ−Ａｌ合金を厚く付着
せしめる（いわゆる厚めっきを行なう）ためには、Ｚｎ
−Ａｌ合金層温度を下げ、走行速度を高めることを行な
う。この場合、Ｚｎ−Ｆｅ合金層と合金浴中のＡｌの反
応が律速過程となるが、溶融Ｐｂ層通過中に鋼線温度が
目標温度に到達しているため反応は十分進行し高速化に
よるめっき不良の問題は生じない。While passing through the molten Zn-Al alloy layer, the Zn-Fe alloy layer (solid phase) on the surface of the steel wire reacts with the Al of the Zn-Al alloy, forming Zn-Al-F with excellent corrosion resistance and workability.
e An intermetallic compound layer is formed. The steel wire leaving the molten Zn-Al alloy layer is cooled and then wound up. On this occasion,
The coating amount is determined according to the temperature of the molten Zn-Al alloy layer and the running speed of the steel wire. For example, above, Zn-A
In order to deposit Zn-Al alloy thickly on the l-Fe intermetallic compound layer (performing so-called thick plating), Zn
- Lower the Al alloy layer temperature and increase the running speed. In this case, the reaction between the Zn-Fe alloy layer and Al in the alloy bath is the rate-determining process, but since the steel wire temperature has reached the target temperature while passing through the molten Pb layer, the reaction progresses sufficiently and the plating is completed at high speed. There are no defects.
【００１４】次に合金組成の限定理由についてのべる。
Ｚｎ−Ａｌ合金の耐食性はＡｌ濃度に依存し、Ａｌ濃度
の高い方が良好な耐食性を示す。したがって、十分な耐
食性向上効果を得るためには３％以上含有せしめる必要
がある。一方、１２％を超えると添加効果が飽和してく
るうえ、融点上昇によりめっき温度が高くなり、鋼線強
度の低下をまねく。これより、Ｚｎ−Ａｌ合金のＡｌ濃
度の下限を２％、上限を１２％とする。なお、Ｚｎ−Ａ
ｌ二元系合金以外にも、前記従来技術に示したところの
、Ｚｎ−Ａｌをベースとする各種合金を使用することも
可能である。Next, the reasons for limiting the alloy composition will be discussed. The corrosion resistance of the Zn-Al alloy depends on the Al concentration, and the higher the Al concentration, the better the corrosion resistance. Therefore, in order to obtain a sufficient effect of improving corrosion resistance, the content must be 3% or more. On the other hand, if it exceeds 12%, the effect of addition becomes saturated, and the plating temperature increases due to the rise in melting point, leading to a decrease in steel wire strength. From this, the lower limit of the Al concentration of the Zn-Al alloy is 2% and the upper limit is 12%. In addition, Zn-A
In addition to the 1-binary alloy, it is also possible to use various Zn-Al based alloys as shown in the prior art.
【００１５】[0015]
【実施例】以下、実施例を図面を参照して説明する。Ｊ
ＩＳ規格のＳＷＲＨ７２Ａ鋼線（２．３ｍｍ）を伸線後
、脱脂酸洗し、その後、塩化アンモニウム＋塩化亜鉛水
溶液中でフラックス処理を行なった。フラックス処理後
の鋼線に対して、図１に示すところの合金めっき槽を用
いて合金めっきを行なった。フラックス処理後の鋼線５
は、溶融Ｚｎ層２、溶融Ｐｂ層３、溶融Ｚｎ−Ａｌ合金
層４の順序で合金めっき槽を通過したのち、垂直に引き
上げられ水冷装置で冷却される。合金めっき層のＡｌ含
有率は１．６％から１３．０％まで変化させ、めっき後
の鋼線の表面性状と耐食性を評価した。[Embodiments] Hereinafter, embodiments will be explained with reference to the drawings. J
After drawing an IS standard SWRH72A steel wire (2.3 mm), it was degreased and pickled, and then fluxed in an aqueous solution of ammonium chloride and zinc chloride. After the flux treatment, the steel wire was subjected to alloy plating using an alloy plating bath shown in FIG. Steel wire 5 after flux treatment
After passing through the alloy plating tank in the order of molten Zn layer 2, molten Pb layer 3, and molten Zn-Al alloy layer 4, it is vertically pulled up and cooled by a water cooling device. The Al content of the alloy plating layer was varied from 1.6% to 13.0%, and the surface texture and corrosion resistance of the steel wire after plating were evaluated.
【００１６】比較とした従来法（１）は、 特開昭５８
−１３６７５９号公報に記載の方法で、Ｚｎ−Ａｌ合金
めっき用フラックスを使用したものである。また、従来
法（２）は、特公平１−５４４２８号公報に示された方
法（２浴法）で、１次めっきとしてＡｌを０．１２％含
むＺｎ浴でめっきを行なっている。[0016] The conventional method (1) for comparison is disclosed in Japanese Patent Application Laid-open No. 1983
This is a method described in Japanese Patent No. 136759, using a Zn-Al alloy plating flux. Conventional method (2) is the method (two-bath method) disclosed in Japanese Patent Publication No. 1-54428, in which plating is performed in a Zn bath containing 0.12% Al as the primary plating.
【００１７】表１に、めっき条件とめっき鋼線の表面性
状および耐食性を示す。耐食性の評価は、ＪＩＳ Ｚ
２３７１に規定された塩水噴霧試験により行ない、赤錆
発生時間を溶融Ｚｎめっき鋼線と比較した。結果を下記
の（１）式で定義する耐食性倍率として定量化した。Table 1 shows the plating conditions, surface properties and corrosion resistance of the plated steel wire. Evaluation of corrosion resistance is based on JIS Z
2371, and the red rust generation time was compared with that of hot-dip Zn-plated steel wire. The results were quantified as a corrosion resistance magnification defined by the following equation (1).
【００１８】[0018]
【数１】
表１からわかるように、本発明法で製造された合金めっ
き鋼線は、「ぶつ」、「ざら」、不めっき等のめっき欠
陥がなく、また、安定した高い耐食性を示す。[Equation 1] As can be seen from Table 1, the alloy-plated steel wire produced by the method of the present invention has no plating defects such as "bumps", "roughness", and no plating, and also exhibits stable and high corrosion resistance.
【００１９】[0019]
【表１】[Table 1]
【００２０】[0020]
【表２】[Table 2]
【００２１】[0021]
【発明の効果】以上の説明から明らかなように、本発明
によれば、従来法に比べめっき欠陥の発生がなく、また
耐食性に優れた合金めっき鋼線の製造が可能である。ま
た、本発明法では、溶融Ｐｂ層を用いているために合金
浴層へＺｎが持ち込まれることがなく、このため、合金
浴組成の変動が大幅に減少し、高位安定した耐食性を維
持することが容易である。さらに、１次めっき（溶融Ｚ
ｎめっき）と合金めっきを別個に行なう場合と比較して
、本発明法では、両者が一体構造のめっき槽を構成して
いるため、設備ならびに運転コストの低減化が可能であ
る。As is clear from the above description, according to the present invention, it is possible to produce an alloy-plated steel wire that is free from plating defects and has excellent corrosion resistance compared to conventional methods. Furthermore, in the method of the present invention, since a molten Pb layer is used, Zn is not brought into the alloy bath layer. Therefore, fluctuations in the alloy bath composition are significantly reduced, and highly stable corrosion resistance can be maintained. is easy. Furthermore, primary plating (molten Z
Compared to the case where plating (N plating) and alloy plating are performed separately, in the method of the present invention, both constitute a plating tank with an integrated structure, so it is possible to reduce equipment and operating costs.
【図１】合金めっき槽の断面図である。FIG. 1 is a sectional view of an alloy plating tank.
１ 合金めっき槽本体 ２ 溶融Ｚｎ層 ３ 溶融Ｐｂ層 ４ 溶融Ｚｎ−Ａｌ合金層 ５ フラックス処理後の鋼線 ６ 合金めっき鋼線 ７ 隔壁 ８ ガイドロール ９ ガイドロール １０ 浸漬ロール １１ 浸漬ロール １２ 冷却装置 1 Alloy plating tank body 2 Molten Zn layer 3 Molten Pb layer 4 Molten Zn-Al alloy layer 5 Steel wire after flux treatment 6 Alloy plated steel wire 7 Partition wall 8 Guide roll 9 Guide roll 10 Dipping roll 11 Dipping roll 12 Cooling device
Claims (1)
ｂ層上の入線部に溶融Ｚｎ層、出線部にＡｌを重量比で
２〜１２％含有する溶融Ｚｎ−Ａｌ合金層を形成させ、
鋼線を溶融Ｚｎ、溶融Ｐｂ、溶融Ｚｎ−Ａｌ合金の順序
で該溶融金属層を連続的に通過させめっきすることを特
徴とするＺｎ−Ａｌ合金めっき鋼線の製造方法。Claim 1: A molten Pb layer at the bottom of the plating tank, and a molten Pb layer at the bottom of the plating tank.
A molten Zn layer is formed in the incoming line part on the b layer, and a molten Zn-Al alloy layer containing 2 to 12% Al by weight is formed in the outgoing line part,
A method for producing a Zn-Al alloy plated steel wire, which comprises plating the steel wire by passing the molten metal layer continuously in the order of molten Zn, molten Pb, and molten Zn-Al alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1680091A JPH04236754A (en) | 1991-01-18 | 1991-01-18 | Production of zn-al alloy plated steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1680091A JPH04236754A (en) | 1991-01-18 | 1991-01-18 | Production of zn-al alloy plated steel wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04236754A true JPH04236754A (en) | 1992-08-25 |
Family
ID=11926232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1680091A Pending JPH04236754A (en) | 1991-01-18 | 1991-01-18 | Production of zn-al alloy plated steel wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04236754A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020040701A (en) * | 2002-03-05 | 2002-05-30 | 덕산산업주식회사 | Hot-dip aluminizing pot |
| WO2014121979A1 (en) * | 2013-02-05 | 2014-08-14 | Thyssenkrupp Steel Europe Ag | Method for hot-dip coating a metal strip, in particular a steel strip |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5381434A (en) * | 1976-12-28 | 1978-07-18 | Nippon Kokan Kk | Melting plating method of zinccaluminium alloy |
| JPS6244563A (en) * | 1985-08-20 | 1987-02-26 | Hokkai Koki Kk | Manufacture of hot dip zinc-aluminum alloy coated steel wire |
-
1991
- 1991-01-18 JP JP1680091A patent/JPH04236754A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5381434A (en) * | 1976-12-28 | 1978-07-18 | Nippon Kokan Kk | Melting plating method of zinccaluminium alloy |
| JPS6244563A (en) * | 1985-08-20 | 1987-02-26 | Hokkai Koki Kk | Manufacture of hot dip zinc-aluminum alloy coated steel wire |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020040701A (en) * | 2002-03-05 | 2002-05-30 | 덕산산업주식회사 | Hot-dip aluminizing pot |
| WO2014121979A1 (en) * | 2013-02-05 | 2014-08-14 | Thyssenkrupp Steel Europe Ag | Method for hot-dip coating a metal strip, in particular a steel strip |
| US9670573B2 (en) | 2013-02-05 | 2017-06-06 | Thyssenkrupp Steel Europe Ag | Method for the hot-dip coating of metal strip, in particular steel strip |
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