JPS5819464A - Manufacture of galvanized steel plate - Google Patents
Manufacture of galvanized steel plateInfo
- Publication number
- JPS5819464A JPS5819464A JP56116398A JP11639881A JPS5819464A JP S5819464 A JPS5819464 A JP S5819464A JP 56116398 A JP56116398 A JP 56116398A JP 11639881 A JP11639881 A JP 11639881A JP S5819464 A JPS5819464 A JP S5819464A
- Authority
- JP
- Japan
- Prior art keywords
- galvanized steel
- steel plate
- work roll
- hot
- acidic
- 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
- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 13
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 8
- 239000002344 surface layer Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 9
- 239000012670 alkaline solution Substances 0.000 claims description 6
- 238000005246 galvanizing Methods 0.000 claims description 5
- 239000003929 acidic solution Substances 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 abstract description 9
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 abstract description 3
- 229910000165 zinc phosphate Inorganic materials 0.000 abstract description 3
- 239000002932 luster Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 8
- 239000011701 zinc Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 235000014692 zinc oxide Nutrition 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 2
- 229960001763 zinc sulfate Drugs 0.000 description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 150000004691 decahydrates Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は光沢性に優れた亜鉛メッキ鋼板の製造方法に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a galvanized steel sheet with excellent gloss.
亜鉛メッキ鋼板は、通常独特のスパングルを持った外観
に仕上げられるが、表面をさらに平滑にするため、溶融
亜鉛メッキ後、光輝肌を有するロールで調質圧延を行い
ゼロスパングル品として仕上げることが従来から行なわ
れている。Galvanized steel sheets are usually finished with a unique spangle appearance, but in order to make the surface even smoother, conventionally, after hot-dip galvanizing, it is temper-rolled using rolls with bright skin to create a zero-spangle product. It has been carried out since.
ところが、この種の方法では必らずしも光沢度の高い亜
鉛メッキ鋼板が得られない。この理由は次の点にあると
思料される。すなわち、溶融亜鉛メッキのままの表面に
は、ＡＩ＋Ｐ＊Ｚｎが存在する。ＡＩは３価、Ｐは５価
、ＺｎはＺｎ金属およびＺｎＯの状態で存在している。However, this type of method does not necessarily yield a galvanized steel sheet with high gloss. The reason for this is thought to be as follows. That is, AI+P*Zn exists on the hot-dip galvanized surface. AI is trivalent, P is pentavalent, and Zn exists in the states of Zn metal and ZnO.
しかるに、Ｘ線粉末回折（ＥＳＣＡ）スペクトルで観察
すると、運動エネルギー９８５．２ｅＶにピークを示す
化合物も存在することが判明する。考えるに、・これは
亜鉛華を除き、亜鉛浴より立上った未凝固亜鉛を有する
スドリ、プをゼロスパングル化するために、使用したシ
ん酸アンモニウムであろうと思われる。このように溶融
亜鉛メッキのままの表面には、上述のＺｎＯやりん酸亜
鉛が、加工により剥離し易い部分として存在する。However, when observed in an X-ray powder diffraction (ESCA) spectrum, it is revealed that there are also compounds that exhibit a peak at a kinetic energy of 985.2 eV. It seems to me that this is the ammonium sulfate used to remove the zinc white and to zero-spangle the uncoagulated zinc that rose from the zinc bath. In this manner, the above-mentioned ZnO and zinc phosphate exist on the hot-dip galvanized surface as parts that are easily peeled off during processing.
かかる易剥離物質は、光輝肌を有するワークロールで調
質圧延して光沢性に優れた鋼板を得ようとする際、メッ
キ層表面より離脱し、ワークロールに順次付着積層し、
これがためにメ。When attempting to obtain a steel plate with excellent gloss by temper rolling with a work roll having a bright skin, such easily peelable substances separate from the surface of the plating layer, adhere to the work roll one by one, and are laminated.
This is for me.
中鋼板の光沢を悪化させるのであると考、えられる〇
光沢性の低下防止方法として、ワークロールまたは支持
ロールに、ロール研摩装置を付設する方法があるが、ロ
ール研摩装置に捕捉された付着物を頻繁に除去せねばな
らず、作業性がきわめて悪い。It is thought that it deteriorates the gloss of the medium steel plate.〇One way to prevent gloss from decreasing is to attach a roll polishing device to the work roll or support roll, but the deposits caught on the roll polishing device must be removed frequently, resulting in extremely poor workability.
本発明は前記欠点を除去し、光沢性に優れたメッキ鋼板
を経済的に得ようとするものである。The present invention aims to eliminate the above-mentioned drawbacks and economically obtain a plated steel sheet with excellent gloss.
このために、溶融亜鉛メッキ後、調質圧延前において、
酸性またはアルカリ性液により処理して易剥離物質を溶
解除去するものである。For this purpose, after hot-dip galvanizing and before temper rolling,
Easily peelable substances are dissolved and removed by treatment with an acidic or alkaline solution.
すなわち、本発明は、溶融亜鉛メッキ後、光輝肌を有す
るワークロールで調質圧延を行う方法において、溶融亜
鉛メッキ後、ＰＨが４以下の酸性またはＰＨが１２以上
のアルカリ性液により溶融亜鉛メッキ表面を処理して、
その表層部に存在する易剥離物質を溶解除去し、その後
前調質圧延を行うことを特徴とするものである。That is, the present invention provides a method in which after hot-dip galvanizing, temper rolling is carried out using a work roll having a bright skin. by processing the
This method is characterized in that easily peelable substances present in the surface layer are dissolved and removed, and then pre-pass rolling is performed.
溶融亜鉛メッキ鋼板を酸性またはアルカリ性液で処理す
ると、ｚｎＯやシん酸亜鉛がメッキ層から離脱して液に
溶解する。酸性またはアルカリ性液に対する亜鉛の溶出
速度をＰＨとの関係のもとに調べると図面に示す結果が
得られる。When a hot-dip galvanized steel sheet is treated with an acidic or alkaline solution, znO and zinc sulfate are separated from the plating layer and dissolved in the solution. When the elution rate of zinc in acidic or alkaline liquids is investigated in relation to pH, the results shown in the drawings are obtained.
同図では、ＰＨ４〜１２では溶邂速度が遅く、■が４以
下、および１２以上では早くなる。したがって、ＰＨを
４以下または１２以上とするのが必要である。しかしな
がら、ＰＨが３以下または１３以上であると、溶解速度
が早くなり過ぎ、連続的に処理する場合などを考えると
、溶解速度の制御が困難となることが多いから、ＰＨを
３７４ 、または１２〜１３とするのが望ましい。In the figure, the melting speed is slow at pH 4 to 12, and fast at pH 4 or less and 12 or higher. Therefore, it is necessary to adjust the pH to 4 or less or 12 or more. However, if the pH is 3 or less or 13 or more, the dissolution rate becomes too fast, and when considering continuous processing, it is often difficult to control the dissolution rate. It is desirable to set it to 13.
かくして、ｚｎＯやりん酸亜鉛を酸性またはアルカリ性
液により溶解除去すると、続く光輝肌を有するワークロ
ールで調質圧延する際に、ワークロールにＺｎＱやシん
酸亜鉛の易溶解物質が付着することは々い。したがって
、きわめて平滑なワークロールによシ調質圧延を行うこ
とができるから、光沢度が高い亜鉛メッキ鋼板を得るこ
とができる。Thus, when ZnO and zinc phosphate are dissolved and removed with an acidic or alkaline solution, easily soluble substances such as ZnQ and zinc sulfate will not adhere to the work roll during subsequent skin pass rolling using a work roll with a bright skin. Many. Therefore, since skin pass rolling can be performed using extremely smooth work rolls, a galvanized steel sheet with high gloss can be obtained.
ちなみに、従来法の、溶融亜鉛メッキ鋼板をそのままワ
ークロールで調質圧延を行う場合における鏡面反射法の
６００正反射率として表わされる光沢度と、本発明法の
酸性またはアルカル性液で処理した後、調質圧延を行う
場合の光沢度とを比較試験したところ、前者が７０チで
あったのに対して、本発明法の光沢度は９５チとな９、
光沢性が著しく改善できることが判明した０なお、使用
液はＰＨ３〜４の酸性液であっても、ＰＨ１２〜１３の
アルカリ性液でも、有意差を見出し得な゛かった。Incidentally, the glossiness expressed as 600 specular reflectance by the specular reflection method when a hot-dip galvanized steel sheet is temper-rolled as it is with a work roll in the conventional method, and the glossiness after treatment with an acidic or alkaline liquid in the present invention method. A comparative test of the glossiness when temper rolling was carried out showed that the glossiness of the method of the present invention was 95cm, whereas the former was 70cm9.
It was found that the glossiness could be significantly improved. Furthermore, no significant difference could be found whether the liquid used was an acidic liquid with a pH of 3 to 4 or an alkaline liquid with a pH of 12 to 13.
ここで、上記液で処理する場合、メッキ鋼板を浴に浸漬
してもよいし、メッキ鋼板に液を噴射し洗い流すように
してもよい０また本発明に用いることができる酸性液と
しては、たとえばＨ２５ｏ４７０チ＋Ｈ３ＰＯ４１５チ
＋インヒビター０．５チ＋緩衝剤（残）−、アルカリ性
液としては、メタ硅酸ソーダ３０チ＋界面活性剤０．５
〜１．０％十水（残）、筐たはメタ硅酸ンユダをオルン
硅酸ソーダに代えたもの、などを用いることができる０
調質圧延方法としては、調質圧延後の一次防錆性を付与
する目的で潤滑油を使用する場合と、ワークロールの転
写率を上げる目的で無潤滑で行う場合とがあるが、ワー
クロールの光沢をストリップに転写させるために、無潤
滑で行うのが好ましい。Here, when treating with the above liquid, the plated steel plate may be immersed in the bath, or the plated steel plate may be sprayed with the liquid and washed away.Also, as the acidic liquid that can be used in the present invention, for example, H25o470+ H3PO415+ inhibitor 0.5+ buffer (remaining) -, alkaline solution is sodium metasilicate 30+ surfactant 0.5
~ 1.0% decahydrate (remaining), kat or metasilicate sodium silicate replaced with orun silicate soda, etc. can be used.
There are two types of temper rolling methods: one uses lubricating oil to provide primary rust prevention after temper rolling, and the other uses no lubrication to increase the transfer rate of the work roll. It is preferable to carry out the process without lubrication in order to transfer the gloss to the strip.
以上の通り、本発明によれば、溶融亜鉛メ。As described above, according to the present invention, molten zinc metal.
中鋼板の表層部に存在する易剥離物質を溶解除去するか
ら、最終的に得られる亜鉛メッキ鋼板の光沢度を確実に
高いものとすることができる０Since easily peelable substances existing on the surface layer of medium steel sheets are dissolved and removed, the gloss of the final galvanized steel sheet obtained can be reliably made high.
図面は酸またはアルカリ液中での溶解速度をＰＨとの関
係で示した相関図である。The figure is a correlation diagram showing the dissolution rate in an acid or alkaline solution in relation to pH.
Claims (1)
で調質圧延を行う方法において、溶融亜鉛メッキ後、Ｐ
Ｈが４以下の酸性またはＰＨが１２以上のアルカリ性液
によシ溶融亜鉛メッキ表面を処理して、その表層部に存
在する易剥離物質を溶解除去し、その後前記調質圧延を
行うことを特徴とする亜鉛メッキ鋼板の製造方法。(1) In a method of performing temper rolling with a work roll having a bright skin after hot-dip galvanizing, after hot-dip galvanizing, P
The hot-dip galvanized surface is treated with an acidic solution with an H of 4 or less or an alkaline solution with a PH of 12 or more to dissolve and remove easily peelable substances present in the surface layer, and then the temper rolling is performed. A method for manufacturing galvanized steel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56116398A JPS5819464A (en) | 1981-07-27 | 1981-07-27 | Manufacture of galvanized steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56116398A JPS5819464A (en) | 1981-07-27 | 1981-07-27 | Manufacture of galvanized steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5819464A true JPS5819464A (en) | 1983-02-04 |
Family
ID=14686049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56116398A Pending JPS5819464A (en) | 1981-07-27 | 1981-07-27 | Manufacture of galvanized steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5819464A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6303705B1 (en) | 1998-05-08 | 2001-10-16 | Sumitomo Special Metals Co., Ltd. | Method for using rubber product or rubber member |
| EP1288325A1 (en) * | 2000-04-24 | 2003-03-05 | Nkk Corporation | Galvannealed sheet steel and method for production thereof |
-
1981
- 1981-07-27 JP JP56116398A patent/JPS5819464A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6303705B1 (en) | 1998-05-08 | 2001-10-16 | Sumitomo Special Metals Co., Ltd. | Method for using rubber product or rubber member |
| EP1288325A1 (en) * | 2000-04-24 | 2003-03-05 | Nkk Corporation | Galvannealed sheet steel and method for production thereof |
| EP1288325A4 (en) * | 2000-04-24 | 2007-04-04 | Jfe Steel Corp | Galvannealed sheet steel and method for production thereof |
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