JP2000239855A - Method of chemical conversion treatment for tinned steel sheet - Google Patents
Method of chemical conversion treatment for tinned steel sheetInfo
- Publication number
- JP2000239855A JP2000239855A JP11040185A JP4018599A JP2000239855A JP 2000239855 A JP2000239855 A JP 2000239855A JP 11040185 A JP11040185 A JP 11040185A JP 4018599 A JP4018599 A JP 4018599A JP 2000239855 A JP2000239855 A JP 2000239855A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- bath
- tin
- chemical conversion
- chromium
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、各種の食品、飲料
及びその他の充填物の保存に適した錫めっき鋼板の化成
処理方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical conversion treatment method for tin-plated steel sheets suitable for storing various foods, beverages and other fillers.
【０００２】[0002]
【従来の技術】錫めっき鋼板は、適切な化成処理と組み
合わせることによって溶接性、塗料密着性、耐食性に優
れた性能を発揮するため、飲料缶や食缶の分野において
広く普及している。2. Description of the Related Art Tin-plated steel sheets have been widely used in the field of beverage cans and food cans because they exhibit excellent performance in weldability, paint adhesion and corrosion resistance when combined with an appropriate chemical conversion treatment.
【０００３】飲料缶や食缶の分野で用いられる錫めっき
鋼板のめっき層の形態には、錫めっき層が平坦なぶり
き、島状錫、粒状錫等の形態があるが、一般的には、前
記めっき層上にクロム化成処理皮膜を形成する。これ
は、錫の酸化による品質の劣化を防止し、あるいは塗料
密着性、耐食性の観点からクロム化成処理皮膜が不可欠
であるからである。[0003] The form of the plating layer of a tin-plated steel sheet used in the field of beverage cans and food cans includes a tinplate layer having a flat tinplate, island-like tin, granular tin and the like. And forming a chromium chemical conversion coating on the plating layer. This is because a chromium chemical conversion coating is indispensable from the viewpoint of preventing deterioration of quality due to tin oxidation, or from the viewpoint of paint adhesion and corrosion resistance.
【０００４】一方、溶接性の観点からは、クロム化成処
理皮膜は有害である。従って、化成処理皮膜のクロム付
着量は、塗料密着性、耐食性、溶接性等の所要の諸性能
を考慮して、所定の範囲内に制御する必要がある。On the other hand, from the viewpoint of weldability, a chromium chemical conversion coating is harmful. Therefore, it is necessary to control the amount of chromium adhered to the chemical conversion coating within a predetermined range in consideration of required properties such as paint adhesion, corrosion resistance, and weldability.
【０００５】例えば、特開平2-25594号公報では、クロ
ム酸と硫酸とフッ素化合物を含む浴で電解処理後に、更
に浸漬処理を行い余分についたクロム析出分を溶解さ
せ、クロム付着量を所要の性能を確保できる所定範囲内
に制御することが記載されている。For example, in Japanese Patent Application Laid-Open No. 2-25594, after electrolytic treatment in a bath containing chromic acid, sulfuric acid and a fluorine compound, further immersion treatment is carried out to dissolve extra chromium deposits and to reduce the amount of chromium adhesion required. It is described that control is performed within a predetermined range in which performance can be ensured.
【０００６】[0006]
【発明が解決しようとする課題】化成処理皮膜は、操業
上の変動を考慮した上で、溶接性以外の諸性能を維持可
能な最低付着量で設計されるべきである。換言すれば、
諸性能さえ維持できれば、化成処理皮膜の付着量は少な
い程、溶接性に優れることになる。The chemical conversion coating should be designed with a minimum amount of adhesion capable of maintaining various properties other than weldability, taking into account operational fluctuations. In other words,
As long as various performances can be maintained, the smaller the amount of the chemical conversion film deposited, the better the weldability.
【０００７】特開平2-25594号公報では、浸漬処理に要
する余分な処理設備が必要なことや、あくまで、余分に
付いたクロムを溶解させるだけで、性能確保のために必
要な最低付着量を低減できる訳ではないので、本質的に
溶接性は改善されない。[0007] Japanese Patent Application Laid-Open No. 2-25594 discloses that the extra processing equipment required for the immersion treatment is necessary, and that the minimum amount of deposit necessary for ensuring the performance is maintained only by dissolving the extra chromium. Since it cannot be reduced, the weldability is not essentially improved.
【０００８】本発明は、前記事情を考慮して、余分な処
理設備を必要とせず、また化成処理皮膜の付着量を低減
しても所要の性能を確保できる錫めっき鋼板の化成処理
方法を提供し、化成処理の付着量を低減することによっ
て溶性性を改善できる錫めっき鋼板の化成処理方法を提
供することを目的とする。In view of the above circumstances, the present invention provides a chemical conversion treatment method for a tin-plated steel sheet which does not require extra treatment equipment and can secure required performance even if the amount of the chemical conversion coating film is reduced. It is another object of the present invention to provide a chemical conversion treatment method for a tin-plated steel sheet which can improve the solubility by reducing the amount of the chemical conversion treatment.
【０００９】[0009]
【課題を解決するための手段】前記課題を解決する本発
明の手段は以下のとおりである。 （１）錫めっき鋼板を、硫酸と無水クロム酸浴を含む浴
に、ポリオキシエチレン鎖を有する有機物を0.1g/l以上
20g/l以下添加したクロムめっき浴を用いて、電流密度5
A/dm2以上で電解処理を施すことを特徴とする錫めっき
鋼板の化成処理方法。 （２）前記（１）において、ポリオキシエチレン鎖を有
する有機物が、平均分子量が10000以上のポリエチレン
グリコールであることを特徴とする錫めっき鋼板の化成
処理方法。Means of the present invention for solving the above problems are as follows. (1) A tin-plated steel sheet is put in a bath containing sulfuric acid and chromic anhydride bath, and an organic substance having a polyoxyethylene chain is 0.1 g / l or more.
Using a chromium plating bath containing 20 g / l or less, current density 5
A chemical conversion treatment method for a tin-plated steel sheet, wherein an electrolytic treatment is performed at A / dm 2 or more. (2) The chemical conversion treatment method for tin-plated steel sheet according to (1), wherein the organic substance having a polyoxyethylene chain is polyethylene glycol having an average molecular weight of 10,000 or more.
【００１０】[0010]
【発明の実施の形態】現在、錫めっき鋼板の化成処理
は、一般的には、硫酸を添加した無水クロム酸浴をベー
スにしためっき浴で処理が施されているが、本発明者ら
が研究を行ったところ、めっき浴や電析の条件によっ
て、諸性能を維持できる最低付着量が異なることがわか
った。また、ポリオキシエチレン鎖を有する有機物を添
加しためっき浴で電解処理して形成した化成処理皮膜
は、無添加の場合に比較して、諸性能を維持するために
必要な最低付着量を低減できることを見出した。DESCRIPTION OF THE PREFERRED EMBODIMENTS At present, the chemical conversion treatment of a tin-plated steel sheet is generally performed in a plating bath based on a chromic anhydride bath to which sulfuric acid is added. Investigations revealed that the minimum amount of coating required to maintain various performances varied depending on the conditions of the plating bath and electrodeposition. In addition, the chemical conversion coating formed by electrolytic treatment in a plating bath containing an organic substance having a polyoxyethylene chain can reduce the minimum amount of deposit required to maintain various performances, compared to the case of no addition. Was found.
【００１１】本発明では、硫酸を添加した無水クロム酸
浴にポリオキシエチレン鎖を有する有機物を添加した浴
で化成処理を施す。硫酸を添加した無水クロム酸浴自体
は公知であるが、この浴にポリオキシエチレン鎖を有す
る有機物を添加することによって、化成処理皮膜のクロ
ム付着量の低減が可能になる。換言すれば、従来材に比
較して、低クロム付着量で諸性能を維持できるため、ク
ロム付着量を従来材より低下し、溶接性に優れる鋼板を
提供できるようになる。また、この方法は、従来公知の
化成処理浴にポリオキシエチレン鎖を有する有機物を添
加するだけであり、余分な付帯設備を必要としない点で
も有利な化成処理方法であるといえる。In the present invention, the chemical conversion treatment is carried out in a bath in which an organic substance having a polyoxyethylene chain is added to a chromic anhydride bath to which sulfuric acid has been added. Although a chromic anhydride bath itself to which sulfuric acid is added is known, the addition of an organic substance having a polyoxyethylene chain to this bath makes it possible to reduce the amount of chromium adhering to the chemical conversion coating. In other words, since various performances can be maintained with a lower chromium adhesion amount as compared with the conventional material, the chromium adhesion amount is reduced as compared with the conventional material, and a steel sheet having excellent weldability can be provided. In addition, this method can be said to be an advantageous chemical conversion treatment method in that an organic substance having a polyoxyethylene chain is simply added to a conventionally known chemical conversion treatment bath, and no extra auxiliary equipment is required.
【００１２】また、硫酸添加の無水クロム酸浴にフッ素
化合物などを添加した浴においても同様の効果が得られ
ることが確かめられている。It has been confirmed that a similar effect can be obtained in a bath in which a fluorine compound or the like is added to a chromic anhydride bath in which sulfuric acid is added.
【００１３】ポリオキシエチレン鎖を含む有機物の添加
量を0.1〜20g/lとした理由は、下限値未満では、添加剤
の僅かな濃度変動によってめっき性能が大きく変化し、
上限値を越えると、効果が飽和するばかりではなく、め
っき液の粘性を上げるため不適切であるからである。ま
た、めっき電流密度を5A/dm2以上としたのは、5A/dm2未
満では、水和クロム酸化物の付着量が増え、前記添加剤
の効果が相対的に低下するためである。The reason why the addition amount of the organic substance containing a polyoxyethylene chain is 0.1 to 20 g / l is that when the amount is less than the lower limit, the plating performance greatly changes due to a slight concentration change of the additive.
If the value exceeds the upper limit, the effect is not only saturated but also inappropriate because the viscosity of the plating solution is increased. The reason why the plating current density is 5 A / dm 2 or more is that if the plating current density is less than 5 A / dm 2 , the amount of hydrated chromium oxide attached increases, and the effect of the additive relatively decreases.
【００１４】平均分子量が10000以上のポリエチレング
リコールは、粉状であるため、ハンドリングしやすく、
溶解性にも優れるので、操業性の点からより好ましい。Polyethylene glycol having an average molecular weight of 10,000 or more is easy to handle because it is in powder form.
Since it is excellent in solubility, it is more preferable from the viewpoint of operability.
【００１５】[0015]
【実施例】次に、本発明の実施例について具体的に説明
する。Next, embodiments of the present invention will be described specifically.
【００１６】通常の方法によって冷間圧延、連続焼鈍及
び調質圧延された厚さ0.22mmの低炭素冷延鋼板に、通常
の脱脂、酸洗後、二価錫イオン濃度30g/L、フェノール
スルホン酸20g/L(硫酸換算)、ENSA(エトキシナフトール
スルホン酸）0〜8g/lを含むフェノールスルホン酸浴を
用いて、鋼板を陰極として電流密度30A/dm2、電解時間
0.3〜1.5secで錫めっきを施し、錫めっき鋼板を作製し
た。その際、錫溶融処理前又は錫溶融処理後の錫めっき
層の形態を調整するために、ENSA濃度を調整し、また電
解時間を調整して所定の錫付着量になるようにした。A low carbon cold rolled steel sheet having a thickness of 0.22 mm, which has been cold-rolled, continuously annealed and temper-rolled by a usual method, is subjected to usual degreasing and pickling, followed by divalent tin ion concentration of 30 g / L and phenol sulfone. Using a phenolsulfonic acid bath containing 20 g / L of acid (in terms of sulfuric acid) and 0 to 8 g / L of ENSA (ethoxynaphtholsulfonic acid), using a steel plate as a cathode, current density of 30 A / dm 2 , and electrolysis time
Tin plating was performed for 0.3 to 1.5 sec to produce a tin-plated steel sheet. At that time, in order to adjust the form of the tin plating layer before or after the tin melting treatment, the ENSA concentration was adjusted, and the electrolysis time was adjusted so that a predetermined tin adhesion amount was obtained.
【００１７】更に、錫めっき層の形態が粒状錫の鋼板に
ついては、錫溶融処理を行わないで弱アルカリ浴中で電
解を行い、錫酸化物を除去した後、所定のクロムめっき
を施した。また、錫めっき層の形態が前記粒状錫以外の
鋼板については、錫溶融処理を施して、錫めっき層の形
態を平板状又は島状の形態とした後、弱アルカリ浴中で
電解を行い、錫酸化物を除去した後、所定のクロムめっ
きを施した。Further, a steel sheet having a tin-plated layer of granular tin was electrolyzed in a weak alkaline bath without performing tin melting treatment, and after removing tin oxide, predetermined chromium plating was applied. Further, for a steel sheet having a tin plating layer other than the above-mentioned granular tin, a tin melting treatment is performed, and after the tin plating layer is formed into a flat plate or island shape, electrolysis is performed in a weak alkaline bath. After removing the tin oxide, predetermined chrome plating was performed.
【００１８】なお、めっき層の形態が平板とは、めっき
層が平坦な所謂ぶりきの形態であり、島状錫とは、めっ
き層の表面に起伏があり、錫の高濃度部と低濃度部が連
続的に存在する形態のもの、不連続錫とは、錫めっき後
のめっき層の形態が粒状錫で、錫塊が鋼板上に離散して
存在し、また直接地鉄の露出部分も存在する構造のもの
をいう。[0018] The plating layer is a flat plate in which the plating layer is flat, that is, a so-called tin plate. The island-shaped tin is an undulation on the surface of the plating layer. In the form of discontinuous tin, the form of the plating layer after tin plating is granular tin, tin lumps are discretely present on the steel sheet, and the exposed part of the direct iron Refers to an existing structure.
【００１９】クロムめっき浴として、無水クロム酸濃
度：15〜45g/L、硫酸濃度：0.1〜1.0g/Lを含むベース浴
を準備し、このベース浴（添加剤無添加浴）を用いてク
ロムめっきを行い、また前記ベース浴に更に添加剤種類
（ポリビニルアルコール又はポリエチレングリコール）
と添加量の異なる添加剤を添加した浴（添加剤含有浴）
を用いてクロムめっきを行い、供試鋼板を作成した。ク
ロムめっきは、浴温度：45℃、電流密度：3〜50A/dm2、
電解時間：0.2secで行ない、クロム付着量の調整は電流
密度を調整して行った。As a chromium plating bath, a base bath containing a chromic anhydride concentration: 15 to 45 g / L and a sulfuric acid concentration: 0.1 to 1.0 g / L is prepared. Plating, and further additives (polyvinyl alcohol or polyethylene glycol) to the base bath
Bath with additives of different amounts (additive containing bath)
Was used to perform chromium plating to prepare a test steel sheet. For chrome plating, bath temperature: 45 ° C, current density: 3-50A / dm 2 ,
The electrolysis time was 0.2 seconds, and the amount of chromium was adjusted by adjusting the current density.
【００２０】供試鋼板の製造条件及び錫めっき層の形
態、錫付着量、クロム付着量を表１に示す。表1におい
て、添加剤種類のPEGはポリエチレングリコールで、PEG
の後の数字は、添加したポリエチレングリコールの平均
分子量である。Table 1 shows the production conditions of the test steel sheet, the form of the tin plating layer, the amount of tin adhesion, and the amount of chromium adhesion. In Table 1, the additive type PEG is polyethylene glycol,
The number after is the average molecular weight of the added polyethylene glycol.
【００２１】[0021]
【表１】 [Table 1]
【００２２】前記で作成した供試鋼板の溶接性、塗料密
着性、耐食性の評価試験を以下に記載する方法で行っ
た。Evaluation tests of the weldability, paint adhesion, and corrosion resistance of the test steel sheets prepared as described above were performed by the methods described below.
【００２３】（１）溶接性（接触抵抗） 供試材を、210℃×30分の熱処理を行った後、50mm平方
に切断、この試料２枚を重ね合わせ、電極径4.5mmφの
電極間に挟み、次いでこの電極間を50kgfで加圧し、接
触抵抗を測定した（電極間に流した電流は1A）。接触抵
抗が30μΩ以下なら合格（記号：○）、30μΩ越えなら
不合格（記号：×）とする。(1) Weldability (contact resistance) The test material was heat-treated at 210 ° C. for 30 minutes, cut into 50 mm squares, and the two samples were superimposed on each other. Then, the pressure between the electrodes was increased by 50 kgf, and the contact resistance was measured (the current flowing between the electrodes was 1 A). If the contact resistance is 30 μΩ or less, it passes (symbol: ○), and if it exceeds 30 μΩ, it rejects (symbol: ×).
【００２４】（２）塗料密着性試験（Ｔピール試験） 供試材にエポキシフェノール系塗料を塗装焼き付け後、
5mm×100mmの試験片に剪断し、切断した試験片を２枚重
ね合わせ、5mm×50mmのナイロンフィルムを間に挟み、
加熱溶融圧着する。フィルムが付いていない部分を外側
に90゜に開き、Ｔ型の試験片を作る。試験片の開いた部
分の端を掴んで、試験片を剥離させていくときの引張強
度を測定した。引張強度が3.5kg/5mm以上を合格（記
号：○）、3.5kg/5mm未満を不合格（記号：×）とす
る。(2) Paint adhesion test (T-peel test) After coating and baking an epoxyphenol-based paint on the test material,
Sheared into a 5 mm x 100 mm test piece, superimposed two cut test pieces, sandwiched a 5 mm x 50 mm nylon film,
Heat melting and compression bonding. Open the portion without the film outward at 90 ° to make a T-shaped test piece. The end of the open part of the test piece was grasped, and the tensile strength when the test piece was peeled was measured. If the tensile strength is 3.5 kg / 5 mm or more, pass (symbol: ○), and if it is less than 3.5 kg / 5 mm, reject (symbol: ×).
【００２５】（３）耐食性試験（ＦＦＣ試験） エポキシフェノール系塗料を50mg/dm2塗装焼き付け（21
0℃×10分）し、さらに裏面にも同一塗料を塗装焼き付
け（190℃×10分）した後、塗膜に鋭利なクロスカット
を入れエリクセン5mm張りだし加工したものを試験サン
プルとした。このサンプルを、温度35℃、5%食塩水溶液
を用いて１時間塩水噴霧試験した後、ろ紙で塩水を拭き
取り、相対湿度85%、温度45℃の雰囲気中に10日間放置
した後、供試材のカットエッジ部及び加工部の発錆程度
を目視により判定した。発生程度が島状錫の標準材（化
成処理のクロム換算のトータル付着量25mg/m2）と同程
度の場合、合格（記号：○）、劣る場合、不合格（記
号：×）とする。評価試験の結果を表1に示す。(3) Corrosion resistance test (FFC test) 50 mg / dm 2 epoxy phenol paint was baked (21
(0 ° C. × 10 minutes), the same paint was applied and baked on the back surface (190 ° C. × 10 minutes), and a sharp cross-cut was formed on the coating film and stretched out by 5 mm Erichsen to obtain a test sample. This sample was subjected to a salt spray test using a 5% saline solution at a temperature of 35 ° C for 1 hour, and then the saltwater was wiped off with a filter paper and left in an atmosphere at a relative humidity of 85% and a temperature of 45 ° C for 10 days. The degree of rusting of the cut edge portion and the processed portion was visually determined. A pass (symbol: ○) is given if the degree of occurrence is almost the same as the standard material of island tin (25 mg / m 2 of chromium equivalent in chemical conversion treatment), and a reject (symbol: ×) is inferior. Table 1 shows the results of the evaluation test.
【００２６】添加剤が無添加の場合、クロム付着量が少
なすぎるため、あるいは多すぎるために、何れも塗料密
着性、あるいは溶接性が劣る。When no additive is added, the adhesion of the paint or the weldability is inferior because the amount of chromium adhered is too small or too large.
【００２７】本発明で規定の添加剤を含むクロムめっき
液を用い、本発明で規定の電流密度でめっきしたもの
（本発明例）は、低いクロム付着量であっても、全ての
性能を満足しており、無添加の場合に比べてクロム付着
量を低減できる。The chromium plating solution containing the additive specified in the present invention and plated at the current density specified in the present invention (Example of the present invention) satisfies all the performances even if the chromium adhesion amount is low. Therefore, the amount of chromium attached can be reduced as compared with the case of no addition.
【００２８】条件７は、電流密度が本発明範囲を下回る
ため、水和クロム酸化物の付着量が増え、トータルクロ
ム付着量が増大するため、添加剤が本発明に規定するも
のであっても、溶接性が不合格である。The condition 7 is that the current density is lower than the range of the present invention, so that the amount of hydrated chromium oxide increases and the total amount of chromium increases. , Weldability is rejected.
【００２９】条件１３は、添加剤の濃度が本発明範囲を
下回るため、本発明の添加剤の効力が十分発揮できない
ため、添加剤の有無で差が認められない。Under the condition 13, since the concentration of the additive is lower than the range of the present invention, the effect of the additive of the present invention cannot be sufficiently exhibited, so that no difference is observed in the presence or absence of the additive.
【００３０】条件２０は、添加剤の種類が本発明に規定
するものと異なるため、添加剤の有無で差が認められな
い。In the condition 20, since the type of the additive is different from that specified in the present invention, there is no difference in the presence or absence of the additive.
【００３１】本発明によれば、所要の性能を確保するた
めに必要なクロム付着量を低減でき、その結果、より優
れた溶接性を得ることができる。According to the present invention, it is possible to reduce the amount of chromium adhering necessary for securing required performance, and as a result, it is possible to obtain more excellent weldability.
【００３２】[0032]
【発明の効果】本発明によれば、所要の性能を確保する
ために必要なクロム付着量を低減できる。クロム付着量
を低減することによって、より優れた溶接性を得ること
ができる。According to the present invention, it is possible to reduce the amount of chromium adhering necessary to secure required performance. By reducing the amount of chromium attached, more excellent weldability can be obtained.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 余村 吉則 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 4K024 AA07 BA03 BB22 BC01 CA02 CA06 DA02 DB04 GA12 GA13 GA14 4K026 AA02 AA11 AA22 BA06 BB08 BB10 CA16 CA21 CA33 CA39 DA03 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshinori Yomura 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term in Nihon Kokan Co., Ltd. 4K024 AA07 BA03 BB22 BC01 CA02 CA06 DA02 DB04 GA12 GA13 GA14 4K026 AA02 AA11 AA22 BA06 BB08 BB10 CA16 CA21 CA33 CA39 DA03
Claims (2)
を含む浴に、ポリオキシエチレン鎖を有する有機物を0.
1g/l以上20g/l以下添加したクロムめっき浴を用いて、
電流密度5A/dm2以上で電解処理を施すことを特徴とする
錫めっき鋼板の化成処理方法。1. A tin-plated steel sheet is placed in a bath containing sulfuric acid and chromic anhydride bath, and an organic substance having a polyoxyethylene chain is added to the bath.
Using a chromium plating bath added with 1 g / l or more and 20 g / l or less,
A chemical conversion treatment method for a tin-plated steel sheet, comprising performing an electrolytic treatment at a current density of 5 A / dm 2 or more.
が、平均分子量が10000以上のポリエチレングリコール
であることを特徴とする請求項１記載の錫めっき鋼板の
化成処理方法。2. The method according to claim 1, wherein the organic substance having a polyoxyethylene chain is polyethylene glycol having an average molecular weight of 10,000 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11040185A JP2000239855A (en) | 1999-02-18 | 1999-02-18 | Method of chemical conversion treatment for tinned steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11040185A JP2000239855A (en) | 1999-02-18 | 1999-02-18 | Method of chemical conversion treatment for tinned steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000239855A true JP2000239855A (en) | 2000-09-05 |
Family
ID=12573733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11040185A Pending JP2000239855A (en) | 1999-02-18 | 1999-02-18 | Method of chemical conversion treatment for tinned steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000239855A (en) |
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| JP2012062519A (en) * | 2010-09-15 | 2012-03-29 | Jfe Steel Corp | Steel sheet for container |
| JP2012062518A (en) * | 2010-09-15 | 2012-03-29 | Jfe Steel Corp | Method for production of steel sheet for container |
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| KR20180019188A (en) | 2015-06-23 | 2018-02-23 | 신닛테츠스미킨 카부시키카이샤 | METHOD FOR MANUFACTURING STEEL PLANT FOR CONTAINER |
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1999
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| WO2011118588A1 (en) | 2010-03-23 | 2011-09-29 | 新日本製鐵株式会社 | Steel sheet for container and method for producing same |
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