JPH04297562A - Production of hot-dip zinc-aluminum alloy coated steel sheet excellent in blackening resistance - Google Patents
Production of hot-dip zinc-aluminum alloy coated steel sheet excellent in blackening resistanceInfo
- Publication number
- JPH04297562A JPH04297562A JP8464291A JP8464291A JPH04297562A JP H04297562 A JPH04297562 A JP H04297562A JP 8464291 A JP8464291 A JP 8464291A JP 8464291 A JP8464291 A JP 8464291A JP H04297562 A JPH04297562 A JP H04297562A
- Authority
- JP
- Japan
- Prior art keywords
- hot
- steel sheet
- dip
- aluminum alloy
- coated 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.)
- Withdrawn
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 229910000611 Zinc aluminium Inorganic materials 0.000 title abstract description 10
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 title abstract description 10
- 229910045601 alloy Inorganic materials 0.000 title abstract description 9
- 239000000956 alloy Substances 0.000 title abstract description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011701 zinc Substances 0.000 claims abstract description 16
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 12
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 7
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 7
- 229910052718 tin Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052745 lead Inorganic materials 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 238000007747 plating Methods 0.000 claims description 23
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000003618 dip coating Methods 0.000 abstract description 3
- 230000003796 beauty Effects 0.000 abstract description 2
- 229910052759 nickel Inorganic materials 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は耐黒変性に優れた溶融亜
鉛・アルミニウム合金めっき鋼板の製造方法に関し、さ
らに詳しくは、鋼板に溶融めっきを行った後に、スキン
パスおよびクロメート処理を行うことにより耐黒変性に
優れた溶融亜鉛・アルミニウム合金めっき鋼板の製造方
法に関するものである。[Industrial Application Field] The present invention relates to a method for producing hot-dip zinc/aluminum alloy coated steel sheets with excellent blackening resistance. The present invention relates to a method for producing a hot-dip zinc/aluminum alloy coated steel sheet with excellent black discoloration.
【０００２】0002
【従来技術】従来から、自動車、家庭電気製品、建築材
料等の用途に対して、優れた耐蝕性、美麗さおよび加工
性を付与するために、溶融亜鉛合金めっきを施した表面
処理鋼板の使用が急速に伸びてきている。[Prior Art] Surface-treated steel sheets coated with hot-dip zinc alloy have been used to provide excellent corrosion resistance, beauty, and workability for applications such as automobiles, home appliances, and building materials. is growing rapidly.
【０００３】そして、種々の表面処理鋼板のなかでも、
特に、Ｚｎ−５ｗｔ％Ａｌ系溶融亜鉛合金めっき鋼板は
、良好な耐蝕性と加工性のために長期間にわたって錆が
発生しないという保証型の建築材料として主に使用され
始めてきている。Among various surface-treated steel sheets,
In particular, Zn-5wt%Al based hot-dip zinc alloy coated steel sheets have begun to be mainly used as building materials that are guaranteed not to rust over a long period of time due to their good corrosion resistance and workability.
【０００４】しかして、最近は用途による品質の要求が
より多様化して、例えば、一例として表面外観の品質に
対して、極めて厳しい向上が望まれるようになっている
。[0004] Recently, however, quality requirements have become more diverse depending on usage, and, for example, extremely strict improvements in surface appearance quality are now desired.
【０００５】そのために、上記に説明したＺｎ−５ｗｔ
％Ａｌ溶融亜鉛合金めっき鋼板は、通常、めっき鋼板の
表面外観を向上させるために、溶融めっき後にスキンパ
ス圧延を行った後、耐蝕性を改善するためにクロメート
処理が行われている。[0005] For this purpose, the above-mentioned Zn-5wt
% Al hot-dip zinc alloy coated steel sheet is usually subjected to skin pass rolling after hot-dip coating in order to improve the surface appearance of the plated steel sheet, and then chromate treatment is performed to improve corrosion resistance.
【０００６】しかしながら、鋼板に対するめっき後の処
理を行うと、保管中または製品の輸送中に鋼板のめっき
表面が灰黒色に変色するという、所謂、黒変現象が発生
してめっき表面の外観を損なうという問題がある。However, when a steel plate is subjected to post-plating treatment, a so-called blackening phenomenon occurs in which the plated surface of the steel plate turns grayish black during storage or product transportation, which impairs the appearance of the plated surface. There is a problem.
【０００７】このような黒変現象は、非スキンパス材料
においても、長期間保管した場合には屡発生することが
観察されるが、スキンパス材においては、特に、短期間
に黒変現象の発生するという特性がある。[0007] Such a blackening phenomenon is often observed to occur even in non-skin pass materials when stored for a long period of time, but in skin pass materials, blackening phenomenon particularly occurs in a short period of time. There is a characteristic that
【０００８】溶融亜鉛・アルミニウム合金めっき鋼板の
黒変防止の技術として、特開昭６１−２０８７９８号公
報に具体的に説明してあるように、鋼板に溶融めっきを
行った後、めっき表面に対してＣｏ水酸化物溶液の吹き
付け処理を行うことにより、耐黒変性に優れた溶融めっ
き鋼板を製造する方法であるが、この技術では黒変を防
止するための溶融めっき後の特殊な設備および処理を必
要とし、繁雑な工程が付加されると共に、設備費用が嵩
むという問題がある。[0008] As a technique for preventing blackening of hot-dip zinc/aluminum alloy coated steel sheets, as specifically explained in Japanese Patent Application Laid-Open No. 61-208798, after hot-dipping the steel sheets, the coating surface is This is a method of manufacturing hot-dip galvanized steel sheets with excellent blackening resistance by spraying a Co hydroxide solution at There are problems in that this requires complicated steps and increases equipment costs.
【０００９】[0009]
【発明が解決しようとする課題】本発明は上記に説明し
た溶融亜鉛合金めっき鋼板の黒変現象に対する技術の種
々の問題点に鑑み、本発明者が黒変現象を防止するため
の操業条件について鋭意研究を行い、検討を重ねた結果
、特別な設備を使用する繁雑な処理を行うことなく、溶
融亜鉛めっき浴の含有成分を変更することにより、耐黒
変性に優れた溶融亜鉛・アルミニウム合金めっき鋼板の
製造方法を開発したのである。Problems to be Solved by the Invention The present invention has been made in view of the various problems in the technology regarding the blackening phenomenon of hot-dip galvanized steel plated steel sheets explained above. As a result of intensive research and repeated consideration, we have developed hot-dip zinc/aluminum alloy plating with excellent blackening resistance by changing the ingredients in the hot-dip galvanizing bath without the need for complicated processing using special equipment. He developed a method for manufacturing steel plates.
【００１０】0010
【課題を解決するための手段】本発明に係る耐黒変性に
優れた溶融亜鉛・アルミニウム合金めっき鋼板の製造方
法は、鋼板に対して、Ａｌ ４．０〜７．０ｗｔ％、
Ｐｂ ０．０１ｗｔ％以下、Ｓｎ ０．００５ｗｔ
％以下を含有し、残部亜鉛および不可避不純物からなる
溶融めっき浴によりめっきを行った後、伸び率０．３〜
２．０％のスキンパスを行い、その後、クロメート処理
を行うことを特徴とする耐黒変性に優れた溶融亜鉛・ア
ルミニウム合金めっき鋼板の製造方法を第１の発明とし
、鋼板に対して、Ａｌ ４．０〜７．０ｗｔ％、Ｐｂ
０．０１ｗｔ％以下、Ｓｎ ０．００５ｗｔ％以
下を含有し、さらに、Ｎｉ ０．００５〜３．０ｗｔ
％、Ｃｕ ０．００５〜３．０ｗｔ％を含有し、残部
亜鉛および不可避不純物からなる溶融めっき浴によりめ
っきを行った後、伸び率０．３〜２．０％のスキンパス
を行い、その後、クロメート処理を行うことを特徴とす
る耐黒変性に優れた溶融亜鉛／アルミニウム合金めっき
鋼板の製造方法を第２の発明とする２つの発明よりなる
ものである。[Means for Solving the Problems] The method for producing a hot-dip zinc-aluminum alloy coated steel sheet with excellent blackening resistance according to the present invention includes a steel sheet containing 4.0 to 7.0 wt% of Al;
Pb 0.01wt% or less, Sn 0.005wt
% or less, and the remainder is zinc and unavoidable impurities.
The first invention is a method for producing a hot-dip zinc-aluminum alloy coated steel sheet with excellent blackening resistance, which is characterized by performing a 2.0% skin pass and then performing a chromate treatment. .0-7.0wt%, Pb
0.01 wt% or less, Sn 0.005 wt% or less, and Ni 0.005 to 3.0 wt%
After plating with a hot-dip plating bath containing 0.005 to 3.0 wt% of Cu and the balance consisting of zinc and unavoidable impurities, a skin pass with an elongation rate of 0.3 to 2.0% is performed, and then chromate This invention consists of two inventions, the second invention being a method for producing a hot-dip zinc/aluminum alloy coated steel sheet with excellent resistance to blackening, which is characterized by carrying out a treatment.
【００１１】本発明に係る耐黒変性に優れた溶融亜鉛・
アルミニウム合金めっき鋼板の製造方法について、以下
詳細に説明する。[0011] Molten zinc with excellent blackening resistance according to the present invention.
A method for producing an aluminum alloy plated steel sheet will be described in detail below.
【００１２】先ず、本発明に係る耐黒変性に優れた溶融
亜鉛・アルミニウム合金めっき鋼板の製造方法において
、使用する溶融亜鉛・アルミニウムめっき溶液について
説明するる。First, the hot-dip zinc-aluminum plating solution used in the method of manufacturing a hot-dip zinc-aluminum alloy coated steel sheet with excellent blackening resistance according to the present invention will be explained.
【００１３】溶融めっき浴中のＡｌ含有量は４．０ｗｔ
％未満ではめっき鋼板の耐蝕性が不充分であり、また、
７．０ｗｔ％を越えて含有させるとめっき鋼板の耐蝕性
は劣化する。よって、溶融めっき溶液中のＡｌ含有量は
４．０〜７．０ｗｔ％とする。[0013] Al content in the hot-dip plating bath is 4.0wt.
If it is less than %, the corrosion resistance of the plated steel sheet is insufficient, and
If the content exceeds 7.0 wt%, the corrosion resistance of the plated steel sheet will deteriorate. Therefore, the Al content in the hot-dip plating solution is set to 4.0 to 7.0 wt%.
【００１４】溶融めっき浴中のＰｂ含有量が０．０１ｗ
ｔ％、およびＳｎ含有量０．００５ｗｔ％を越えて含有
させると、鋼板のめっき表面および結晶粒界に多く含有
されて局部電池が形成され、さらに、クロメート層は水
分を吸収し易いので、クロメート処理を行った場合に、
電気化学的腐蝕が進行し易くなり、また、スキンパス処
理を行うことにより、めっき表面が活性化されて腐蝕が
進行して黒変現象が発生するようになる。従って、Ｐｂ
含有量は０．０１ｗｔ％以下、Ｓｎ含有量は０．００５
ｗｔ％以下とすることにより、めっき表面および結晶粒
界への濃縮を防止することができる。[0014] Pb content in the hot-dip plating bath is 0.01w
If the Sn content exceeds 0.005 wt%, it will be contained in large amounts on the plated surface and grain boundaries of the steel sheet, forming local batteries.Furthermore, since the chromate layer easily absorbs moisture, the chromate When processing,
Electrochemical corrosion progresses more easily, and by performing the skin pass treatment, the plating surface is activated, corrosion progresses, and a blackening phenomenon occurs. Therefore, Pb
Content is 0.01wt% or less, Sn content is 0.005
By setting the content to wt% or less, concentration on the plating surface and grain boundaries can be prevented.
【００１５】溶融めっき浴中のＮｉおよびＣｕは、含有
量が０．００５ｗｔ％未満では黒変に対する改善効果か
不充分であり、また、３．０ｗｔ％を越えて含有させる
とめっき溶液の安定性が極端に劣化する。よつて、Ｎｉ
含有量は０．００５〜３．０ｗｔ％、Ｃｕ含有量は０．
００５〜３．０ｗｔ％とする。[0015] If the content of Ni and Cu in the hot-dip plating bath is less than 0.005 wt%, the effect of improving black discoloration is insufficient, and if the content exceeds 3.0 wt%, the stability of the plating solution may be affected. is extremely deteriorated. By the way, Ni
The content is 0.005 to 3.0 wt%, and the Cu content is 0.005 to 3.0 wt%.
005 to 3.0 wt%.
【００１６】なお、溶融めっき浴中にＭｇが含有される
場合があるが、このＭｇは耐蝕性をより向上させる元素
であり、また、腐蝕剥離を低減するために含有させるこ
とができる。[0016] Mg may be contained in the hot-dip plating bath, but this Mg is an element that further improves corrosion resistance, and can also be contained in order to reduce corrosion peeling.
【００１７】次に、本発明に係る耐黒変性に優れた溶融
亜鉛・アルミニウム合金めっき鋼板の製造方法において
、鋼板にめっきを行った後の処理について説明する。Next, in the method for manufacturing a hot-dip zinc-aluminum alloy coated steel sheet with excellent blackening resistance according to the present invention, the treatment after plating the steel sheet will be explained.
【００１８】鋼板にめっき後のスキンパスにおける伸び
率は、０．３％未満では美麗な表面外観とすることがで
ないのみならず、ストレッチャーストレインが残留し、
引き続き行われるレベラー処理において、所謂、“レベ
ラーブレーク”が発生するようになり、また、２．０％
を越える伸び率のスキンパスでは材質が硬化して所望の
材質特性が得られない。よって、鋼板にめっき後のスキ
ンパス伸び率は０．３〜２．０％とする。If the elongation rate in the skin pass after plating the steel plate is less than 0.3%, not only will it not be possible to obtain a beautiful surface appearance, but also stretcher strain will remain.
In the subsequent leveler processing, a so-called "leveler break" will occur, and a 2.0%
If the skin pass has an elongation rate exceeding , the material will harden and the desired material properties will not be obtained. Therefore, the skin pass elongation rate after plating the steel plate is set to 0.3 to 2.0%.
【００１９】スキンパスを行った後に、クロメート処理
を行うのであるが、このクロメート処理は、素材に対す
る耐蝕性を向上させ、さらに、金属素地と塗膜との密着
性を確保するためであり、例えば、亜鉛めっき鋼板にお
いて、めっきままの状態、即ち、クロメート処理なしの
状態では、短期間に亜鉛の腐蝕生成物である白錆が発生
して、外観を著しく損なう。この対策として、めっき表
面にバリアーとして、クロメート皮膜を形成させ、めっ
き層自体の腐蝕を遅らせている。そして、一般的には、
外観上はめっきままの材料を使用しているように見えて
も、クロメート処理は行っているものと考えられる。After the skin pass is performed, chromate treatment is performed, and the purpose of this chromate treatment is to improve the corrosion resistance of the material and further ensure the adhesion between the metal base and the coating film.For example, If a galvanized steel sheet is left unplated, that is, without chromate treatment, white rust, which is a corrosion product of zinc, will form over a short period of time, significantly impairing its appearance. As a countermeasure to this problem, a chromate film is formed as a barrier on the plating surface to retard the corrosion of the plating layer itself. And in general,
Even though it appears to be using as-plated material, it is likely that chromate treatment has been applied.
【００２０】[0020]
【実 施 例】本発明に係る耐黒変性に優れた溶融
亜鉛・アルミニウム合金めっき鋼板の製造方法の実施例
を説明する。[Example] An example of the method of manufacturing a hot-dip zinc-aluminum alloy coated steel sheet with excellent blackening resistance according to the present invention will be described.
【００２１】[0021]
【実 施 例】表１に示す含有成分えよび成分割合の溶
融めっき浴を使用して、０．８ｍｍ厚さのＡｌキルド鋼
にめっきを行い、伸び率１．０％のスキンパス圧延を行
った後、ＣｒＯ３ ３０ｇ／ｌの処理液により温度３０
℃でクロメート処理を行った。次いで、耐黒変性を調査
した。
耐黒変性試験 ９５℃×９８％ＲＨ表２
に試験結果を示す。[Example] Using a hot-dip plating bath with the ingredients and proportions shown in Table 1, 0.8 mm thick Al killed steel was plated and skin pass rolled with an elongation rate of 1.0%. After that, the temperature was increased to 30°C using a treatment solution containing 30g/l of CrO3.
Chromate treatment was performed at °C. Next, blackening resistance was investigated. Blackening resistance test 95℃ x 98%RH Table 2
The test results are shown below.
【００２２】[0022]
【表１】[Table 1]
【００２３】[0023]
【表２】[Table 2]
【００２４】表２から本発明に係る耐黒変性に優れた溶
融亜鉛・アルミニウム合金めっき鋼板の製造方法によれ
ば、製造された溶融めっき鋼板は黒変することなく、比
較例に比べて優れていることがわかる。Table 2 shows that according to the method for producing a hot-dip zinc-aluminum alloy coated steel sheet with excellent blackening resistance according to the present invention, the produced hot-dip coated steel sheet does not blacken and is superior to the comparative example. I know that there is.
【００２５】[0025]
【発明の効果】以上説明したように、本発明に係る耐黒
変性に優れた溶融亜鉛・アルミニウム合金めっき鋼板の
製造方法は上記の構成であるから、鋼板に溶融めっきを
行った後、特別な後処理を行う必要がなく、優れた耐黒
変性を有する溶融亜鉛・アルミニウム合金めっき鋼板を
製造することができる。[Effects of the Invention] As explained above, since the method for manufacturing a hot-dip zinc-aluminum alloy coated steel sheet with excellent blackening resistance according to the present invention has the above-mentioned structure, after hot-dipping the steel sheet, It is possible to produce a hot-dip zinc/aluminum alloy coated steel sheet with excellent blackening resistance without the need for post-treatment.
Claims (2)
０ｗｔ％、Ｐｂ ０．０１ｗｔ％以下、Ｓｎ ０．
００５ｗｔ％以下を含有し、残部亜鉛および不可避不純
物からなる溶融めっき浴によりめっきを行った後、伸び
率０．３〜２．０％のスキンパスを行い、その後、クロ
メート処理を行うことを特徴とする耐黒変性に優れた溶
融亜鉛／アルミニウム合金めっき鋼板の製造方法。Claim 1: For steel plate, Al 4.0 to 7.
0wt%, Pb 0.01wt% or less, Sn 0.
After plating with a hot-dip plating bath containing 0.005 wt% or less and the balance consisting of zinc and unavoidable impurities, a skin pass with an elongation rate of 0.3 to 2.0% is performed, and then a chromate treatment is performed. A method for manufacturing hot-dip zinc/aluminum alloy coated steel sheets with excellent blackening resistance.
０ｗｔ％、Ｐｂ ０．０１ｗｔ％以下、Ｓｎ ０．
００５ｗｔ％以下を含有し、さらに、Ｎｉ ０．００
５〜３．０ｗｔ％、Ｃｕ ０．００５〜３．０ｗｔ％
を含有し、残部亜鉛および不可避不純物からなる溶融め
っき浴によりめっきを行った後、伸び率０．３〜２．０
％のスキンパスを行い、その後、クロメート処理を行う
ことを特徴とする耐黒変性に優れた溶融亜鉛／アルミニ
ウム合金めっき鋼板の製造方法。2. Al 4.0-7.0 for steel plate.
0wt%, Pb 0.01wt% or less, Sn 0.
0.05wt% or less, and further contains Ni 0.00wt% or less
5-3.0wt%, Cu 0.005-3.0wt%
After plating with a hot-dip plating bath containing zinc and unavoidable impurities, the elongation rate is 0.3 to 2.0.
A method for producing a hot-dip zinc/aluminum alloy coated steel sheet with excellent blackening resistance, the method comprising performing a skin pass of % and then chromate treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8464291A JPH04297562A (en) | 1991-03-25 | 1991-03-25 | Production of hot-dip zinc-aluminum alloy coated steel sheet excellent in blackening resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8464291A JPH04297562A (en) | 1991-03-25 | 1991-03-25 | Production of hot-dip zinc-aluminum alloy coated steel sheet excellent in blackening resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04297562A true JPH04297562A (en) | 1992-10-21 |
Family
ID=13836350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8464291A Withdrawn JPH04297562A (en) | 1991-03-25 | 1991-03-25 | Production of hot-dip zinc-aluminum alloy coated steel sheet excellent in blackening resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04297562A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008056821A1 (en) | 2006-11-10 | 2008-05-15 | Jfe Galvanizing & Coating Co., Ltd. | HOT-DIP Zn-Al ALLOY COATED STEEL SHEET AND PROCESS FOR THE PRODUCTION THEREOF |
-
1991
- 1991-03-25 JP JP8464291A patent/JPH04297562A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008056821A1 (en) | 2006-11-10 | 2008-05-15 | Jfe Galvanizing & Coating Co., Ltd. | HOT-DIP Zn-Al ALLOY COATED STEEL SHEET AND PROCESS FOR THE PRODUCTION THEREOF |
| US8962153B2 (en) | 2006-11-10 | 2015-02-24 | Jfe Galvanizing & Coating Co., Ltd. | Hot-dip Zn—Al alloy coated steel sheet and producing method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980514 |