JPH03207891A - Corrosion resisting single roll steel tube and its production - Google Patents
Corrosion resisting single roll steel tube and its productionInfo
- Publication number
- JPH03207891A JPH03207891A JP298790A JP298790A JPH03207891A JP H03207891 A JPH03207891 A JP H03207891A JP 298790 A JP298790 A JP 298790A JP 298790 A JP298790 A JP 298790A JP H03207891 A JPH03207891 A JP H03207891A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- wound steel
- layer
- zinc
- nickel layer
- 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 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 238000005260 corrosion Methods 0.000 title claims abstract description 32
- 230000007797 corrosion Effects 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000011324 bead Substances 0.000 claims abstract description 30
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 8
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 claims description 28
- 238000007747 plating Methods 0.000 abstract description 12
- 238000000137 annealing Methods 0.000 abstract description 9
- 238000002844 melting Methods 0.000 abstract description 9
- 230000008018 melting Effects 0.000 abstract description 9
- 229910007567 Zn-Ni Inorganic materials 0.000 abstract 7
- 229910007614 Zn—Ni Inorganic materials 0.000 abstract 7
- 239000010410 layer Substances 0.000 description 34
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 28
- 229910052759 nickel Inorganic materials 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 239000000446 fuel Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007654 immersion 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
- 239000000203 mixture Substances 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、各種気体、液体とくに自動車用燃料の供給管
として耐食性に優れている耐食性一重巻鋼管及びその製
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a corrosion-resistant single-wound steel pipe that has excellent corrosion resistance as a supply pipe for various gases and liquids, especially fuel for automobiles, and a method for manufacturing the same.
（従来の技術〉
従来から、各種気体、液体とくに自動車燃料供給管とし
ては、たとえば、帯鋼板の一方の面に電気ニッケルめっ
きを施し、このニッケルめっき層が管の内側になるよう
にロールホーミングにより或型して、突き合わせ部を電
極ロールにて電気抵抗溶接し、焼鈍による熱処理をして
製管した一重巻鋼管、あるいは、特開昭６３−１０９１
８０号公報に記載された前記の一重巻鋼管のビード部に
ニッケル合金からなる化学めっき層を被着した一重巻鋼
管などが使用されている。(Prior art) Conventionally, various gases and liquids, especially automobile fuel supply pipes, have been produced by, for example, electrolytic nickel plating on one side of a steel strip, and roll-homing so that this nickel plating layer is on the inside of the pipe. A single-wound steel pipe made by forming a shape, electrical resistance welding the butt portions using electrode rolls, and heat treatment by annealing, or JP-A-63-1091
The single-wound steel pipe described in Japanese Patent No. 80, in which a chemical plating layer made of a nickel alloy is coated on the bead portion of the single-wound steel pipe, is used.
（発明が解決しようとする課題）
しかしながら、第４図に示すように、帯鋼板にニッケル
めっき層を形成して製管して得られる一重巻鋼管１１は
、ビード部１４以外は、ニッケルめっき層１２によって
被覆されているが、ビード部１４の表面は、溶接による
素材の溶融によって鋼索地が露出し且つビード部１４附
近が自己犠牲腐食作用を持たないニッケルによって被覆
されているために防食できずここから腐食をうけ耐食性
に劣っている。さらに、アルコール混合燃料用配管とし
た場合には、水分の混入やアルコールの分解による有機
酸によってビード部１４だけでなく、ニッケルめっき層
１２に存在するビンホールや微小なクラックを通して素
材の鋼材が腐食されるという問題がある。又、特開昭６
３−１０９１８０号公報は耐食性についてはある程度満
足できるが、操作が複雑で手数を要するという問題があ
る。(Problem to be Solved by the Invention) However, as shown in FIG. 4, the single-wound steel pipe 11 obtained by forming a nickel plating layer on a steel strip and manufacturing the pipe has no nickel plating layer except for the bead portion 14. However, the surface of the bead portion 14 cannot be protected against corrosion because the steel cable base is exposed due to melting of the material during welding, and the vicinity of the bead portion 14 is coated with nickel, which does not have a self-sacrificial corrosion effect. It suffers from corrosion and has poor corrosion resistance. Furthermore, in the case of pipes for alcohol-mixed fuel, the steel material is corroded not only through the bead portion 14 but also through the holes and minute cracks present in the nickel plating layer 12 due to the contamination of moisture and organic acids caused by the decomposition of alcohol. There is a problem that Also, JP-A-6
Although the method disclosed in Japanese Patent No. 3-109180 is satisfactory in terms of corrosion resistance, there is a problem in that the operation is complicated and time-consuming.
本発明は、前記問題を解決し、耐食性に優れている一重
巻鋼管を簡易な構或、製法によって得ることを目的とす
るものである。The object of the present invention is to solve the above-mentioned problems and to obtain a single-wound steel pipe with excellent corrosion resistance using a simple structure and manufacturing method.
（課題を解決するための手段）
本発明者等は、前記問題を解決し、前記目的を達成する
ためには、帯鋼材に形成するめっき層を従来のニッケル
めっきの代りに、自己犠牲腐食作用を有し且つニッケル
より融点が低いと共に溶接後の熱処理温度に近い融点を
有する亜鉛−ニッケル層とすることによって目的を達し
得ることを見出して本発明を完或するに至った。すなわ
ち、本発明の第１の実施態様は、一重巻鋼管の少くとも
ビード部以外の内周面に亜鉛−ニッケル層を形成した耐
食性一重巻鋼管であり、第２の実施態様は、前記第ｌの
実施態様の一重巻鋼管の内周面に更にクロメート皮膜を
形成した耐食性一重巻鋼管であり、第３の実施態様は、
帯鋼板あ少なくとも一方表面に亜鉛−ニッケル層を設け
た後、該亜鉛−ニッケル層を内側面側に位置して長手両
側端縁部を突き合わせて、溶着、熱処理する耐食性一重
巻鋼管の製造方法であり、第４の実施態様は、第３の実
施態様に係る方法によって得た一重巻鋼管の内周面をク
ロメート処理する耐食性鋼管の製造方法である。(Means for Solving the Problems) In order to solve the above problems and achieve the above objects, the present inventors have proposed that the plating layer formed on the steel strip be replaced with the conventional nickel plating, which has a self-sacrificial corrosion effect. The inventors have now completed the present invention by discovering that the object can be achieved by creating a zinc-nickel layer which has a melting point lower than that of nickel and a melting point close to the post-weld heat treatment temperature. That is, the first embodiment of the present invention is a corrosion-resistant single-wound steel pipe in which a zinc-nickel layer is formed on the inner circumferential surface of the single-wound steel pipe at least in areas other than the bead portion, and the second embodiment is a The third embodiment is a corrosion-resistant single-wound steel pipe in which a chromate film is further formed on the inner peripheral surface of the single-wound steel pipe, and the third embodiment is
A method for manufacturing a corrosion-resistant single-wound steel pipe, in which a zinc-nickel layer is provided on at least one surface of a steel strip, and then the zinc-nickel layer is placed on the inner surface side, the longitudinal edges of both sides are butted together, welded and heat treated. The fourth embodiment is a method for producing a corrosion-resistant steel pipe, in which the inner circumferential surface of the single-wound steel pipe obtained by the method according to the third embodiment is treated with chromate.
本発明における製管用素材としては、ｓｐｃｃ材のよう
な鋼材の帯状材を使用する。In the present invention, a steel strip material such as SPCC material is used as the material for pipe manufacturing.
前記帯鋼材の少なくとも一方表面に形成する亜鉛−ニッ
ケル層は、たとえば、ＺｎＣｂ １００ ｇ／Ｊ！、Ｎ
！ ＩＪ ２ ・６Ｈ２０ １３０ ｇ，／１ 、Ｎ
ＨａＣＮ ２００ ｇ／Ｊ！、ｐＨ５．７、ＺＮ・１０
ＨＵ ５０ ｍｅ／Ｉ ， ＩＮ・２０ １０ ｄ／Ｊ
！（荏原ユージライト製）を使用して、温度３４〜３６
℃、電流密度３Ａ／ｌｊｌｌ＋２、時間２〜２０分のよ
うな条件で膜厚１〜１０μｉｌｌでＪ組戒がＺｎ／ Ｎ
ｉ ＝ ５０／５０〜９７／３好ましくは９２／８の
皮膜を形成することが望ましい。The zinc-nickel layer formed on at least one surface of the steel strip is, for example, ZnCb 100 g/J! , N
! IJ2 ・6H20 130 g,/1, N
HaCN 200 g/J! , pH5.7, ZN・10
HU 50 me/I, IN・20 10 d/J
! (manufactured by Ebara Eudylite) at a temperature of 34 to 36
℃, current density 3A/ljll+2, time 2 to 20 minutes, film thickness 1 to 10 μill, and J group was Zn/N.
It is desirable to form a film with i=50/50 to 97/3, preferably 92/8.
前記帯鋼材をロール戒型、溶接の後に、Ｚｎ／Ｎｉ皮膜
の融点附近で熱処理をして造管する。その後、さらにク
ロメート皮膜を形成する場合には、たとえば、ＺＮ ．
８０ＹＭＵ ５Ｍ／Ｊ！ 、Ｉ）Ｈ ２．０、温度４
８〜５２℃、時間２０秒といった条件でクロメート処理
し、膜厚１μｍ以下の皮膜を形成することが好ましい。The steel strip is rolled, welded, and then heat treated near the melting point of the Zn/Ni coating to form a pipe. After that, when further forming a chromate film, for example, ZN.
80YMU 5M/J! , I) H 2.0, temperature 4
It is preferable to perform the chromate treatment under the conditions of 8 to 52° C. for 20 seconds to form a film having a thickness of 1 μm or less.
次に、添付の図面に基づいて本発明一重巻鋼管の構戒を
述べる。Next, the construction of the single-wound steel pipe of the present invention will be described based on the attached drawings.
第１図は、本発明の製造方法の一実施例方法によって製
造された本発明一重巻鋼管の一実施例を示す平面図、第
２図は、第１図中Ａ−Ａｌｉ上の断面を切欠きによる一
部の拡大断面図、第３図は、本発明一重巻鋼管の他の実
施例を第２図と同様に示す拡大断面図、第４図は、従来
の一重巻鋼管例を第２図と同様に示す拡大断面図である
。FIG. 1 is a plan view showing an embodiment of the single-wound steel pipe of the present invention manufactured by an embodiment of the manufacturing method of the present invention, and FIG. 2 is a cross section taken along A-Ali in FIG. 1. FIG. 3 is an enlarged cross-sectional view of a part of the single-wound steel pipe according to the present invention, similar to FIG. 2, and FIG. It is an enlarged sectional view shown similarly to a figure.
すなわち、１は、一重巻鋼管であり、２は、亜鉛−ニッ
ケル層であって、一重巻鋼管１の少くともビード部以外
の内周面に形成されており、３は、クロメート皮膜であ
って、一重巻鋼管１のビード部を含めた全内周面上に形
成されている。That is, 1 is a single-wound steel pipe, 2 is a zinc-nickel layer formed on the inner circumferential surface of the single-wound steel pipe 1 at least in areas other than the bead, and 3 is a chromate film. , are formed on the entire inner peripheral surface of the single-wound steel pipe 1 including the bead portion.
このような本発明の一重巻鋼管１は、前記のような帯鋼
板の一方の表面に、前記のような条件で亜鉛−ニッケル
層２を形成した後、亜鉛−ニッケル層２が管の内側面側
になるように位置してロールホーミングによって長手両
側端縁部を突き合わせて管状に戒型し、突き合わせ部を
電極ロールにて電気抵抗溶接した後、亜鉛−ニッケル層
２の融点附近の温度で焼鈍による熱処理をすることによ
って製造することができる。In the single-wound steel pipe 1 of the present invention, a zinc-nickel layer 2 is formed on one surface of the steel strip under the conditions described above, and then the zinc-nickel layer 2 is formed on the inner surface of the pipe. The two longitudinal edges are butted against each other by roll homing to form a tubular shape, and the abutted portions are electrically resistance welded using electrode rolls, and then annealed at a temperature near the melting point of the zinc-nickel layer 2. It can be manufactured by heat treatment.
尚、この融点附近での温度の焼鈍によって、ビード部４
附近の亜鉛−ニッケル層２は展延してビード部４の少く
とも一部を被覆することになる。Note that by annealing at a temperature near the melting point, the bead portion 4
The adjacent zinc-nickel layer 2 will extend to cover at least a portion of the bead 4.
さらに、このようにして得た少くともビード部４以外の
内周面に亜鉛−ニッケル層２を形成している一重巻鋼管
の内周面を前記のようなクロメート液を使用してクロメ
ート皮膜３をビード部４をも含めた全内周面に形成する
ようにすることができる。Furthermore, the inner circumferential surface of the thus obtained single-wound steel pipe having the zinc-nickel layer 2 formed on the inner circumferential surface other than at least the bead portion 4 is coated with a chromate film 3 using the above-mentioned chromate solution. can be formed on the entire inner peripheral surface including the bead portion 4.
本発明の一重巻鋼管はこのように構或されているので、
ビード部以外、およびビード部附近における溶接後の焼
鈍による熱処理により展延した亜鉛−ニッケル層で被覆
されている部分の耐食性は、自己犠牲腐食作用を持たず
且つ融点が高く焼鈍により展延することのないニッケル
めっきをした従来品より向上し、又、ビード部は、ビー
ド部を除く部分に形成されている亜鉛−ニッケル層の自
己犠牲腐食作用によっても耐食性が確保されるものであ
る。さらに、クロメート処理をし、ビード部を含む全内
周面にクロメート皮膜を形成した場合には、ビード部以
外は、亜鉛−ニッケル層単独の場合より耐食性が３〜５
倍向上し、又、ビード部は、焼鈍により展延されなかっ
た部分においてもクロメート処理による鉄の不働態化、
及び、亜鉛ニッケル層の耐食性の向上によって、さらに
耐食性が改善されるものであって、アルコール混合燃料
でも腐食しない耐食性に優れている一重巻鋼管となし得
たものと考えられる。Since the single-wound steel pipe of the present invention is constructed as described above,
The corrosion resistance of the parts other than the bead and the parts near the bead covered with the zinc-nickel layer spread by heat treatment by post-welding annealing is that it does not have a self-sacrificial corrosion effect, has a high melting point, and spreads by annealing. Furthermore, the corrosion resistance of the bead portion is also ensured by the self-sacrificial corrosion effect of the zinc-nickel layer formed in the area other than the bead portion. Furthermore, when chromate treatment is performed and a chromate film is formed on the entire inner circumferential surface including the bead, the corrosion resistance of the area other than the bead is 3 to 55% higher than that of a zinc-nickel layer alone.
In addition, even in the bead part, which was not spread by annealing, the iron is passivated by chromate treatment.
Furthermore, the corrosion resistance is further improved by the improvement in the corrosion resistance of the zinc-nickel layer, and it is thought that a single-wound steel pipe with excellent corrosion resistance that does not corrode even with alcohol-mixed fuel could be obtained.
（発明の効果〉
本発明は、帯鋼板の少なくとも一方の面上に亜鉛−ニッ
ケル層を形成し、ロール戒型、熱処理を伴う遣管をした
一重巻鋼管であり製造方法であるから、ビード部に、溶
着時に亜血−ニッケル層がなくとも、その後の焼鈍によ
る熱処理によってビード部附近への亜鉛−ニッケル層の
展延をもたらし、又少くともビード部以外の内周面に形
成されている亜鉛−ニッケル層の自己犠牲腐食作用によ
って耐食性が確保され、その他の部分は、従来のニッケ
ル単体層に較べて耐食性を向上し得、さらに全内周面に
亘ってクロメート皮膜を形成すればさらに耐食性を向上
し得るものであって、簡易にして顕著な効果を挙げ得た
発明である。(Effects of the Invention) The present invention is a single-wound steel pipe in which a zinc-nickel layer is formed on at least one surface of a steel strip, roll-formed, and heat-treated. Even if there is no submerged nickel layer at the time of welding, the subsequent annealing heat treatment will cause the zinc-nickel layer to spread to the vicinity of the bead, and at least the zinc formed on the inner peripheral surface other than the bead. - Corrosion resistance is ensured by the self-sacrificial corrosion effect of the nickel layer, and the corrosion resistance of other parts can be improved compared to the conventional single nickel layer. Furthermore, if a chromate film is formed over the entire inner circumferential surface, corrosion resistance can be further improved. This is an invention that can be improved, and is simple and has a remarkable effect.
？実施例〉 次に、本発明の実施例を述べる。? Example> Next, examples of the present invention will be described.
実施例 １
素材としてｓｐｃｃ帯鋼板を使用し、その一方の面上に
、亜鉛−ニッケルめっき液として、ＺｎｌＪ２１００
ｇ／．Ｑ ．Ｎｉ（Ｊ■・６Ｈ２０ １３０ ｇ／Ｍ
、ＮＨａ（４２００ ｇ／．１１ ， ｐＨ ５．７、
ＺＮ ・ＩＯＭＵ ５０ ｍｅ／４１ 、ＺＮ ・２０
１０ ｒａｔ，／ｌ！ ｛荏原ユージライト製｝を使
用して、温度３４〜３６℃、電流密度３Ａ／ｄｉ２、時
間６分の条件で、組成Ｚｎ／Ｎｉ＝９２／８で膜厚３μ
ｍの亜鉛ニッケル層を形成し、該亜鉛−ニッケル層側を
内側面側となるように長手両側端縁側を突き合わせた状
態で通常の電縫鋼管の製造法により電気抵抗溶着し、次
いで亜鉛−ニッケル層の融点附近の温度で焼鈍による熱
処理をしてビード部附近の亜鉛−ニッケル層を展延せし
めてビード部の少くとも一部を被覆し、ビード部を除く
内周面に約３μｍの亜釣−ニッケル層を形成した外径６
． ３５ｍｍ、肉厚０．７ｍｍ、長さ５００ ｎｗｎの
一重巻鋼管を製作した。Example 1 An SPCC steel strip plate was used as the material, and ZnlJ2100 was applied as a zinc-nickel plating solution on one side of the plate.
g/. Q. Ni(J■・6H20 130 g/M
, NHa (4200 g/.11, pH 5.7,
ZN・IOMU 50 me/41, ZN・20
10 rat,/l! Using a film {manufactured by Ebara Eudyrite}, the film thickness was 3μ with the composition Zn/Ni=92/8 under the conditions of temperature 34-36℃, current density 3A/di2, time 6 minutes.
A zinc-nickel layer of m is formed, and the zinc-nickel layer is electrically resistance welded by a normal electric resistance welding steel pipe manufacturing method with both longitudinal end edges abutted so that the inside surface side is the zinc-nickel layer side, and then the zinc-nickel layer is Heat treatment is performed by annealing at a temperature near the melting point of the layer to spread the zinc-nickel layer near the bead to cover at least a part of the bead, and to form a sub-groin of approximately 3 μm on the inner circumferential surface excluding the bead. - outer diameter 6 with nickel layer formed
．． A single-wound steel pipe with a diameter of 35 mm, a wall thickness of 0.7 mm, and a length of 500 nwn was manufactured.
得られた一重巻鋼管について、塩水噴霧試験による耐食
試験、及び、メチルアルコール３５０ ｍｆｆｉ、ギＷ
！ｉ３．Ｏｍｅ、水３０ｍ）２、残部市販ガソリンから
なる１０００−のアルコール混合燃料を４０±１℃に保
った試験浴に浸漬して５００時間ごとに取出して内面を
観察するアルコール混合燃料浸漬試験によって赤錆発生
時間を調べた。その結果は、第１表の通りである。The obtained single-wound steel pipe was subjected to a corrosion resistance test using a salt spray test, and 350 mffi of methyl alcohol, GiW.
! i3. The occurrence of red rust was determined by an alcohol mixed fuel immersion test in which a 1000-ml alcohol mixed fuel consisting of 30 m of water and the remainder commercially available gasoline was immersed in a test bath kept at 40 ± 1°C and taken out every 500 hours to observe the inner surface. I checked the time. The results are shown in Table 1.
なお、従来のニッケル単層の一重巻鋼管についても同様
な試験を行なったが、その結果は同じく第１表の通りで
ある。A similar test was also conducted on a conventional nickel single-layer single-wound steel pipe, and the results are shown in Table 1.
実施例 ２
実施例１と同様にして一重巻鋼管を製作して、さらに、
ＺＮ−８０Ｙ ＭＵ ５０ｍｆｆｉ／４１ 、ｐＨ ２
．０のようなクロメート処理液を使用して、温度４８〜
５７℃で２０秒間クロメート処理して膜厚１μ陶以下の
クロメート皮膜を全内周面上に形成した一重巻鋼管を製
作した。Example 2 A single-wound steel pipe was manufactured in the same manner as in Example 1, and further,
ZN-80Y MU 50mffi/41, pH 2
．． Using a chromate treatment solution such as
A single-wound steel pipe was manufactured by performing chromate treatment at 57° C. for 20 seconds to form a chromate film with a thickness of 1 μm or less on the entire inner peripheral surface.
得られた一重巻鋼管について実施例１と同様な耐食試験
を行なった。その結果は、第１表の通りであった。The same corrosion resistance test as in Example 1 was conducted on the obtained single-wound steel pipe. The results were as shown in Table 1.
第１図は、本発明の製造方法の一実施例方法によって製
造された本発明一重巻鋼管の一実施例を示す平面図、第
２図は、第１図中Ａ−Ａ線上の断面を切欠きによる一部
の拡大断面図、第３図は、本発明一重巻鋼管の他の実施
例を第２図と同様に示す拡大断面図、第４図は、従来の
一重巻鋼管例を第２図と同機に示す拡大断面図である。
１・・・一重巻鋼管、２・・・亜鉛−ニッケル層、３・
・クロメート皮膜、４・・・ビード部。FIG. 1 is a plan view showing an embodiment of the single-wound steel pipe of the present invention manufactured by an embodiment of the manufacturing method of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A in FIG. FIG. 3 is an enlarged cross-sectional view of a part of the single-wound steel pipe according to the present invention, similar to FIG. 2, and FIG. It is an enlarged cross-sectional view of the same aircraft as the figure. 1...Single-wound steel pipe, 2...Zinc-nickel layer, 3...
・Chromate film, 4...bead part.
Claims (1)
鉛−ニッケル層を形成してなることを特徴とする耐食性
一重巻鋼管。 ２） 請求項１記載の一重巻鋼管の内周面に更にクロメ
ート皮膜を形成してなることを特徴とする耐食性一重巻
鋼管。 ３） 帯鋼板の少なくとも一方表面に亜鉛−ニッケル層
を設けた後、該亜鉛−ニッケル層を内側面側に位置して
長手両側端縁部を突き合わせして、溶着、熱処理するこ
とを特徴とする耐食性一重巻鋼管の製造方法。 ４） 帯鋼板の少なくとも一方表面に亜鉛−ニッケル層
を設けた後、該亜鉛−ニッケル層を内側面側に位置して
長手両側端縁部を突き合わせして、溶着、熱処理して一
重巻鋼管を形成し、その後該一重巻鋼管の内周面をクロ
メート処理することを特徴とする一重巻鋼管の製造方法
。[Scope of Claims] 1) A corrosion-resistant single-wound steel pipe, characterized in that a zinc-nickel layer is formed on the inner peripheral surface of the single-wound steel pipe at least at areas other than the bead portion. 2) A corrosion-resistant single-wound steel pipe, characterized in that a chromate film is further formed on the inner peripheral surface of the single-wound steel pipe according to claim 1. 3) After providing a zinc-nickel layer on at least one surface of the steel strip, the zinc-nickel layer is positioned on the inner surface side, the longitudinal edges of both sides are butted, and then welded and heat treated. A method for producing corrosion-resistant single-wound steel pipes. 4) After providing a zinc-nickel layer on at least one surface of the steel strip, place the zinc-nickel layer on the inner surface side, abutting both longitudinal edges, welding and heat treating to form a single-wound steel pipe. 1. A method for producing a single-wound steel pipe, which comprises forming a single-wound steel pipe, and then subjecting the inner circumferential surface of the single-wound steel pipe to chromate treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP298790A JP2848888B2 (en) | 1990-01-10 | 1990-01-10 | Corrosion resistant single-wound steel pipe and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP298790A JP2848888B2 (en) | 1990-01-10 | 1990-01-10 | Corrosion resistant single-wound steel pipe and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03207891A true JPH03207891A (en) | 1991-09-11 |
| JP2848888B2 JP2848888B2 (en) | 1999-01-20 |
Family
ID=11544728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP298790A Expired - Fee Related JP2848888B2 (en) | 1990-01-10 | 1990-01-10 | Corrosion resistant single-wound steel pipe and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2848888B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103037996A (en) * | 2010-08-06 | 2013-04-10 | 东洋钢钣株式会社 | Steel plate for producing pipe highly resistant to fuel vapor corrosion, pipe using same and method for producing pipe |
-
1990
- 1990-01-10 JP JP298790A patent/JP2848888B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103037996A (en) * | 2010-08-06 | 2013-04-10 | 东洋钢钣株式会社 | Steel plate for producing pipe highly resistant to fuel vapor corrosion, pipe using same and method for producing pipe |
| US9700928B2 (en) | 2010-08-06 | 2017-07-11 | Toyo Kohan Co., Ltd. | Steel plate for producing pipe highly resistant to fuel vapor corrosion, pipe using same and method for producing pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2848888B2 (en) | 1999-01-20 |
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