JPH04288924A - Steel wire coated with corrosion-resistant zinc alloy - Google Patents
Steel wire coated with corrosion-resistant zinc alloyInfo
- Publication number
- JPH04288924A JPH04288924A JP7687391A JP7687391A JPH04288924A JP H04288924 A JPH04288924 A JP H04288924A JP 7687391 A JP7687391 A JP 7687391A JP 7687391 A JP7687391 A JP 7687391A JP H04288924 A JPH04288924 A JP H04288924A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion
- steel wire
- zinc alloy
- alloy
- coated
- 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
- 230000007797 corrosion Effects 0.000 title claims abstract description 47
- 238000005260 corrosion Methods 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 229910001297 Zn alloy Inorganic materials 0.000 title claims abstract description 22
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- 239000011575 calcium Substances 0.000 claims abstract description 12
- 239000011701 zinc Substances 0.000 claims abstract description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 11
- 229910000882 Ca alloy Inorganic materials 0.000 claims abstract description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 5
- 239000011247 coating layer Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000003672 processing method Methods 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 description 4
- 229910007570 Zn-Al Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000008397 galvanized steel Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 238000004210 cathodic protection Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Non-Insulated Conductors (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は耐食性亜鉛合金被覆鋼線
に関し、特に海岸地方のような激甚雰囲気において使用
される耐食性亜鉛合金被覆鋼線に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrosion-resistant zinc alloy coated steel wire, and more particularly to a corrosion-resistant zinc alloy coated steel wire used in severe atmospheres such as coastal areas.
【０００２】0002
【従来の技術】従来より、鋼線の耐食性を向上させるた
めに、鋼線にアルミニウムや、亜鉛を被覆した耐食性被
覆鋼線が使用されている。アルミ被覆鋼線は優れた耐食
性能を有し、その耐食挙動は表面に形成されるＡｌ２
Ｏ３ 被覆が大きな役割を果たす事実は既に確認されて
いる。しかし、Ａｌ２ Ｏ３ の保護被膜としての効果
は、通常の腐食雰囲気内でのものであり、海岸地帯のよ
うな激甚雰囲気においては必ずしも十分な効果は得られ
ない。
すなわち、Ａｌ２ Ｏ３ の保護被膜は表面酸化により
自然形成されるため、形成むらにより部分的に被覆の不
十分な箇所があり、所謂ピッチング腐食と言われる深い
部分腐食を形成する原因となっていた。2. Description of the Related Art Conventionally, corrosion-resistant coated steel wires, which are steel wires coated with aluminum or zinc, have been used to improve the corrosion resistance of steel wires. Aluminum coated steel wire has excellent corrosion resistance, and its corrosion resistance behavior is due to the Al2 formed on the surface.
The fact that O3 coating plays a major role has already been confirmed. However, the effect of Al2O3 as a protective film is limited to a normal corrosive atmosphere, and a sufficient effect cannot necessarily be obtained in a severe atmosphere such as a coastal area. That is, since the Al2O3 protective film is naturally formed by surface oxidation, there are some areas where the coating is insufficient due to uneven formation, which causes the formation of deep partial corrosion called so-called pitting corrosion.
【０００３】一方、亜鉛メッキ鋼線は、耐食性鋼線とし
て電線分野においても架空地線や鋼心アルミ撚り線とし
て利用されているものであり、腐食挙動が所謂自己犠牲
によるため、鋼線に対して陽極となる亜鉛被覆が選択的
に腐食され、内部の鋼線自体を腐食から防止するという
陰極防食としての作用を奏する。このため、亜鉛メッキ
鋼線の腐食は全面腐食であって、その挙動は海岸地帯の
ような激甚雰囲気においても変わるところはない。これ
を前記ピッチング腐食と対比すると、ピッチング腐食が
鋼線に対して局部的に大きなダメージを与えるのに対し
、亜鉛メッキ鋼線は全面腐食となり、腐食の程度は前記
ピッチング腐食と比較して経時的に緩やかなものとなる
。On the other hand, galvanized steel wire is used as a corrosion-resistant steel wire in the electric wire field as an overhead ground wire and steel-core aluminum stranded wire, and since its corrosion behavior is due to so-called self-sacrifice, it is not suitable for steel wires. The zinc coating, which becomes the anode, is selectively corroded, which acts as cathodic protection to prevent the internal steel wire itself from corrosion. Therefore, the corrosion of galvanized steel wire is general corrosion, and its behavior remains the same even in severe atmospheres such as coastal areas. Comparing this with the pitting corrosion described above, pitting corrosion causes large local damage to the steel wire, whereas galvanized steel wire suffers general corrosion, and the degree of corrosion changes over time compared to the pitting corrosion described above. It becomes more gradual.
【０００４】しかし、亜鉛メッキ鋼線は文字通りメッキ
法によって亜鉛被覆を形成したものであるため、被覆厚
さは最大でも５０μｍ程度であり、全体としての耐食性
能の向上に限界があった。また、亜鉛被覆層の形成方法
として、メッキ法以外にもクラッド法や、押出法が考え
られるが、亜鉛特有の塑性変形特性により実施すること
が非常に困難であった。However, since galvanized steel wire is literally coated with zinc by a plating method, the coating thickness is at most about 50 μm, which limits the improvement in the overall corrosion resistance. In addition to the plating method, cladding methods and extrusion methods can be considered as methods for forming the zinc coating layer, but these methods are extremely difficult to implement due to the plastic deformation characteristics unique to zinc.
【０００５】そこで、最近では、鋼線に亜鉛（Ｚｎ）−
アルミニウム（Ａｌ）合金を被覆した耐食性複合線が考
案されている。しかし、この被覆層の耐食性は、Ａｌ比
率の増大とともに向上する反面、押出加工法においては
Ａｌ比率の増大とともに加工性が低下してしまう。また
、粒界で腐食，破壊が生じる恐れがあった。このため、
上記のようなＺｎ−Ａｌ合金の耐食性を改善するために
、現在ではＺｎ−Ａｌ合金に第三元素を加える研究が進
められている。Therefore, recently, zinc (Zn)-
A corrosion-resistant composite wire coated with an aluminum (Al) alloy has been devised. However, although the corrosion resistance of this coating layer improves as the Al ratio increases, in extrusion processing, the processability decreases as the Al ratio increases. Furthermore, there was a fear that corrosion and destruction would occur at grain boundaries. For this reason,
In order to improve the corrosion resistance of the Zn-Al alloy as described above, research is currently underway to add a third element to the Zn-Al alloy.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記の
ようにＺｎ−Ａｌ合金に第三元素を添加すると、耐食性
の改善は図れる反面、多くの場合、機械特性の変化によ
り、押出加工における押出圧力が高くなって加工性が低
下してしまう。[Problems to be Solved by the Invention] However, although adding a third element to the Zn-Al alloy as described above can improve corrosion resistance, in many cases the extrusion pressure during extrusion processing is reduced due to changes in mechanical properties. This results in a decrease in workability.
【０００７】[0007]
【発明の目的】本発明はかかる点に鑑みて成されたもの
であり、押出加工方法における材料の加工性を低下させ
ることなく、激甚雰囲気においても優れた耐食性能を発
揮する耐食性亜鉛合金被覆鋼線を提供することを目的と
する。OBJECTS OF THE INVENTION The present invention has been made in view of the above points, and provides a corrosion-resistant zinc alloy coated steel that exhibits excellent corrosion resistance even in severe atmospheres without reducing the workability of the material in extrusion processing methods. The purpose is to provide a line.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係る耐食性亜鉛合金被覆鋼線は、１〜２２
重量％のアルミニウムと０．０１〜１重量％のカルシウ
ムとを含有し、残部が亜鉛からなるＺｎ−Ａｌ−Ｃａ合
金を、鋼線の外周表面に押出加工法により被覆形成して
いる。[Means for Solving the Problems] In order to achieve the above object, the corrosion-resistant zinc alloy coated steel wire according to the present invention has a corrosion resistance of 1 to 22
A Zn-Al-Ca alloy containing 0.01 to 1% by weight of calcium and the remainder zinc is coated on the outer peripheral surface of the steel wire by extrusion processing.
【０００９】[0009]
【実施例】以下、本発明の一実施例を添付図面を参照し
つつ詳細に説明する。第１図には、実施例に係る耐食性
亜鉛合金被覆鋼線の製造装置１０の構成が示されている
。図において、符号１２は長尺状の鋼線、１４は押出加
工用ダイス、１６は亜鉛合金ビレット、１８は鋼線１２
の表面に亜鉛合金被覆層１６ａが形成された亜鉛合金被
覆線、２０は亜鉛合金被覆線１８を巻き取る巻取リール
である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the configuration of an apparatus 10 for producing a corrosion-resistant zinc alloy coated steel wire according to an embodiment. In the figure, numeral 12 is a long steel wire, 14 is an extrusion die, 16 is a zinc alloy billet, and 18 is a steel wire 12.
20 is a take-up reel for winding up the zinc alloy coated wire 18 on which the zinc alloy coated wire 16a is formed.
【００１０】亜鉛合金ビレット１６（亜鉛合金被覆層１
６ａ）は、１〜２２重量％のアルミニウムと０．０１〜
１重量％のカルシウムとを含有し、残部が亜鉛からなる
Ｚｎ−Ａｌ−Ｃａ合金であり、ダイス１４により移送す
る鋼線１２の外周表面に押出被覆される。なお、アルミ
ニウムの含有量は１３〜２２重量％程度であることが望
ましい。Zinc alloy billet 16 (zinc alloy coating layer 1
6a) with 1-22% by weight of aluminum and 0.01-22% by weight of aluminum;
It is a Zn-Al-Ca alloy containing 1% by weight of calcium and the balance being zinc, and is extruded and coated on the outer peripheral surface of the steel wire 12 to be transferred by the die 14. Note that the aluminum content is preferably about 13 to 22% by weight.
【００１１】次に、本発明にかかる耐食性亜鉛合金被覆
鋼線１８の第１の性能試験について説明する。ここで、
本発明の試料としては、１重量％のアルミニウム（Ａｌ
）が含有された亜鉛（Ｚｎ）に、表１に示す量だけＣａ
を添加したＺｎ−Ａｌ−Ｃａ合金を溶解鋳造して、直径
７０ｍｍのビレットを形成し、押出温度３００℃、押出
比１５０で直径５ｍｍの鋼線の外周面に被覆形成したも
のを使用する。また、比較例の試料としては、Ｃａの添
加量が０．０１％以下，及び０．１％以上のＺｎ−Ａｌ
−Ｃａ合金を上記試料と同様の方法により、鋼線の外周
面に被覆形成したものを使用する。上記のような各試料
に対し、１０００時間の塩水噴霧試験を実施し、試験前
後の重量変化を測定した。この時の各試料の腐食減量が
表１に示されている。Next, a first performance test of the corrosion-resistant zinc alloy coated steel wire 18 according to the present invention will be explained. here,
The samples of the present invention contained 1% by weight of aluminum (Al
) is added to zinc (Zn) containing Ca in the amount shown in Table 1.
A Zn-Al-Ca alloy to which is added is melted and cast to form a billet with a diameter of 70 mm, and the outer circumferential surface of a steel wire with a diameter of 5 mm is coated at an extrusion temperature of 300° C. and an extrusion ratio of 150. In addition, as comparative samples, Zn-Al with an added amount of Ca of 0.01% or less and 0.1% or more were used.
A steel wire coated with -Ca alloy on the outer peripheral surface by the same method as the above sample is used. A 1000-hour salt water spray test was conducted on each sample as described above, and weight changes before and after the test were measured. Table 1 shows the corrosion weight loss of each sample at this time.
【００１２】表１から分かるように、Ｃａの添加量が０
．０１％以下の比較例では、母材合金（Ｃａ−０％）と
同程度の挙動（腐食減量）を示す。また、Ｃａ添加量が
０．１％以上の比較例でも腐食減量の多いことが分かる
。これに対し、Ｃａを０．０１〜０．１％添加している
本発明の試料においては、いずれの場合も腐食減量が母
材合金のそれよりかなり小さく、耐食性の改善が見られ
る。すなわち、０．０１〜０．１％程度の微量のＣａの
添加は、押出圧力の低下による押出加工性の低下を抑制
するとともに、耐食性の向上効果を発揮することになる
。As can be seen from Table 1, when the amount of Ca added is 0
．． Comparative examples of 0.01% or less exhibit behavior (corrosion weight loss) comparable to that of the base alloy (Ca-0%). Furthermore, it can be seen that even in the comparative example in which the amount of Ca added was 0.1% or more, the corrosion loss was large. On the other hand, in the samples of the present invention in which 0.01 to 0.1% of Ca is added, the corrosion loss is considerably smaller than that of the base alloy in all cases, and an improvement in corrosion resistance is observed. That is, addition of a trace amount of Ca of about 0.01 to 0.1% suppresses a decrease in extrusion processability due to a decrease in extrusion pressure, and exhibits the effect of improving corrosion resistance.
【００１３】[0013]
【表１】[Table 1]
【００１３】次に、本発明にかかる耐食性亜鉛合金被覆
鋼線の第２の性能試験について説明する。試料としては
、亜鉛（Ｚｎ）に１３重量％，２２％のアルミニウム（
Ａｌ）が含有されたＺｎＡｌ合金に、表２，表３に示す
量だけＣａを添加したＺｎ−Ａｌ−Ｃａ合金を上記第１
の性能試験と同様の条件で鋼線の外周面にＺｎ−Ａｌ−
Ｃａ合金を被覆形成したものを使用する。その後、第１
の性能試験と同様に１０００時間の塩水噴霧試験を実施
し、試験前後の重量変化を測定した。この時の各試料の
腐食減量が表２，表３にそれぞれ示されている。Next, a second performance test of the corrosion-resistant zinc alloy coated steel wire according to the present invention will be explained. As a sample, 13% by weight of zinc (Zn) and 22% of aluminum (
The above first Zn-Al-Ca alloy was prepared by adding Ca in the amounts shown in Tables 2 and 3 to the ZnAl alloy containing Al).
Zn-Al- on the outer peripheral surface of the steel wire under the same conditions as the performance test.
A material coated with Ca alloy is used. Then the first
A 1000 hour salt water spray test was conducted in the same manner as the performance test, and the weight change before and after the test was measured. The corrosion weight loss of each sample at this time is shown in Tables 2 and 3, respectively.
【００１４】表２，表３より、本発明に係る試料が比較
例に比べて耐食性に優れ、更にＡｌの添加量が多いほど
耐食性が向上することが分かる。From Tables 2 and 3, it can be seen that the samples according to the present invention have better corrosion resistance than the comparative examples, and that the corrosion resistance improves as the amount of Al added increases.
【００１５】[0015]
【表２】[Table 2]
【００１６】[0016]
【表３】[Table 3]
【００１８】[0018]
【発明の効果】以上説明したように、本発明に係る耐食
性亜鉛合金被覆鋼線は、１〜２２重量％のアルミニウム
と０．０１〜１重量％のカルシウムとを含有し、残部が
亜鉛からなるＺｎ−Ａｌ−Ｃａ合金を、鋼線の外周表面
に押出加工法により被覆形成しているため、材料の加工
性を低下させることなく、激甚雰囲気においても優れた
耐食性能を発揮するという効果がある。Effects of the Invention As explained above, the corrosion-resistant zinc alloy coated steel wire according to the present invention contains 1 to 22% by weight of aluminum and 0.01 to 1% by weight of calcium, with the balance being zinc. Since the Zn-Al-Ca alloy is coated on the outer peripheral surface of the steel wire by extrusion processing, it has the effect of exhibiting excellent corrosion resistance even in severe atmospheres without reducing the workability of the material. .
【図１】図１は、実施例に係る耐食性亜鉛合金被覆鋼線
の製造装置の構成を示す断面図である。FIG. 1 is a sectional view showing the configuration of a manufacturing apparatus for a corrosion-resistant zinc alloy coated steel wire according to an example.
【図２】図２は、図１の製造装置の要部の構成を示す拡
大断面図である。FIG. 2 is an enlarged cross-sectional view showing the configuration of essential parts of the manufacturing apparatus shown in FIG. 1. FIG.
１０ 耐食性亜鉛合金被覆鋼線製造装置１２
鋼線
１４ ダイス
１６ 亜鉛合金ビレット
１６ａ 亜鉛合金被覆層
１８ 亜鉛合金被覆鋼線
２０ 巻取リール10 Corrosion-resistant zinc alloy coated steel wire manufacturing equipment 12
Steel wire 14 Die 16 Zinc alloy billet 16a Zinc alloy coating layer 18 Zinc alloy coated steel wire 20 Take-up reel
Claims (1)
．０１〜１重量％のカルシウムとを含有し、残部が亜鉛
からなるＺｎ−Ａｌ−Ｃａ合金を、押出加工により、鋼
線の表面に被覆形成してなることを特徴とする耐食性亜
鉛合金被覆鋼線。Claim 1: 1 to 22% by weight of aluminum, and 0
．． A corrosion-resistant zinc alloy coated steel wire, characterized in that the surface of the steel wire is coated with a Zn-Al-Ca alloy containing 01 to 1% by weight of calcium and the balance being zinc by extrusion processing. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7687391A JPH04288924A (en) | 1991-03-16 | 1991-03-16 | Steel wire coated with corrosion-resistant zinc alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7687391A JPH04288924A (en) | 1991-03-16 | 1991-03-16 | Steel wire coated with corrosion-resistant zinc alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04288924A true JPH04288924A (en) | 1992-10-14 |
Family
ID=13617757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7687391A Pending JPH04288924A (en) | 1991-03-16 | 1991-03-16 | Steel wire coated with corrosion-resistant zinc alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04288924A (en) |
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| CN107177809A (en) * | 2017-07-05 | 2017-09-19 | 国网山东省电力公司电力科学研究院 | A kind of galvanizing by dipping kalzium metal coating and its hot dip coating method |
| CN110592513A (en) * | 2019-09-30 | 2019-12-20 | 国网山东省电力公司临沂供电公司 | Hot-dip galvanizing aluminum-calcium alloy coating and hot-dip galvanizing method thereof |
-
1991
- 1991-03-16 JP JP7687391A patent/JPH04288924A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903181A (en) * | 2017-03-14 | 2017-06-30 | 昆明理工恒达科技股份有限公司 | A kind of palisading type anode continuously extruded preparation method of sheath aluminium composite material |
| CN107177809A (en) * | 2017-07-05 | 2017-09-19 | 国网山东省电力公司电力科学研究院 | A kind of galvanizing by dipping kalzium metal coating and its hot dip coating method |
| CN110592513A (en) * | 2019-09-30 | 2019-12-20 | 国网山东省电力公司临沂供电公司 | Hot-dip galvanizing aluminum-calcium alloy coating and hot-dip galvanizing method thereof |
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