JP3435255B2 - Manufacturing equipment for electro-galvanized steel sheet with excellent lubricity - Google Patents
Manufacturing equipment for electro-galvanized steel sheet with excellent lubricityInfo
- Publication number
- JP3435255B2 JP3435255B2 JP13170295A JP13170295A JP3435255B2 JP 3435255 B2 JP3435255 B2 JP 3435255B2 JP 13170295 A JP13170295 A JP 13170295A JP 13170295 A JP13170295 A JP 13170295A JP 3435255 B2 JP3435255 B2 JP 3435255B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- oxide film
- lubricity
- film
- inorganic oxide
- 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.)
- Expired - Lifetime
Links
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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
- C23C28/3225—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only with at least one zinc-based layer
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、潤滑性に優れた電気亜
鉛系めっき鋼板の製造設備に関するものである。
【０００２】
【従来の技術】電気亜鉛系めっき鋼板等の表面にＭｎ、
Ｐ酸化物等を生成せしめて、潤滑性（プレス性）、化成
処理性を向上することが、特開平４−８８１７６号公報
に開示されている。このような表面処理鋼板は、プレス
成形性において摺動性が冷延鋼板以上に向上し、しかも
成形時の押疵がなくなり、かつ酸化物もプレスによる剥
離等がなく、化成処理性にも優れたものである。
【０００３】
【発明が解決しようとする課題】上記のごとき、電気亜
鉛系めっき鋼板は、潤滑性、化成処理性に優れており、
自動車メーカー、家電メーカー等において、採用される
機運が高まりつつあるのが実情である。しかして自動車
メーカー等での採用（使用）に際しては、使用量が膨大
になることから大量に、しかも品質の高い潤滑性等に優
れた電気亜鉛系めっき鋼板を安定して供給することが必
要になることは明らかである。しかしながら上記のごと
き、潤滑性等に優れた電気亜鉛系めっき鋼板は製品とし
て新規なものであり、工業的規模で安定して製造する設
備が存在せず、従って、現在のところ大量に安定して供
給するこができない等の課題がある。本発明は、このよ
うな課題を有利に解決するためなされたものであり、上
記のごとき潤滑性等に優れた電気亜鉛系めっき鋼板を工
業的規模で安定して製造する設備を提供することを目的
とするものである。
【０００４】
【課題を解決するための手段】本発明の特徴とするとこ
ろは、鋼板前処理装置と、電気亜鉛系めっき装置と、洗
浄装置と、めっき層表面を酸化皮膜が形成されていない
表面とするための活性化処理装置と、活性化後の表面に
無機系酸化物皮膜を均一に形成するための潤滑性向上用
酸化膜生成装置と、乾燥装置を連設したことを特徴とす
る潤滑性に優れた電気亜鉛系めっき鋼板の製造設備であ
る。
【０００５】
【作用】鋼板前処理装置としては、鋼帯（鋼板）を連続
的に鋼板前処理装置へ導き、オルソ硅酸ソーダ、タン酸
ソーダ、苛性ソーダ等のｐＨ１０以上のアルカリ性水溶
液で洗浄することが好ましい。ｐＨ約１０未満であると
亜鉛系めっき鋼板表面に発生している酸化物の除去が不
十分になることがあり、また除去に長時間を要すること
になり生産性に影響することがあるので好ましくない。
このようなアルカリ性水溶液に電気亜鉛系めっき鋼板を
浸漬するか、アルカリ性水溶液中で電解処理する等によ
って洗浄することができる。また塩酸、硫酸等の酸性水
溶液により上記のごとく洗浄する。
【０００６】上記のごとく、洗浄した鋼帯を電気亜鉛系
めっき装置へ導き、竪型または水平型の電気めっき装置
で鋼帯を陰極、電極を陽極として電気めっき液中で通電
して亜鉛系めっきを施すものである。その電気亜鉛系め
っき鋼板としては、例えば亜鉛を主成分とするアルミよ
るものがあり、めっき組成としては純Ｚｎの他、Ｚｎと
Ｆｅ、ＺｎとＮｉ、ＺｎとＡｌ、ＺｎとＭｎ、ＺｎとＣ
ｒ、ＺｎとＴｉ、ＺｎとＭｇなどＺｎを主成分として、
あるいは耐食性など諸機能の向上のためＦｅ、Ｎｉ、Ｃ
ｏ、Ａｌ、Ｐｂ、Ｓｎ、Ｓｂ、Ｃｕ、Ｔｉ、Ｓｉ、Ｂ、
Ｐ、Ｎ、Ｓ、Ｏ等の１種ないし２種以上の合金元素及び
不純物元素を含み、又ＳｉＯ2 、Ａｌ2Ｏ3 などのセラ
ミックス微粒子、ＴｉＯ2 、ＢａＣｒＯ4 などの酸化
物、アクリル樹脂などの有機高分子をめっき層中に分散
させたものがあり、めっき層の厚み方向で単一組成のも
の、連続的あるいは層状に組成が変化するものがあり、
更に多層めっき鋼板では、最上層に、めっき組成として
は純Ｚｎの他、ＺｎとＦｅ、ＺｎとＮｉ、ＺｎとＡｌ、
ＺｎとＭｎ、ＺｎとＣｒ、ＺｎとＴｉ、ＺｎとＭｇなど
Ｚｎを主成分として、耐食性などの諸機能の向上のため
１種ないし２種以上の合金元素及び不純物元素を含み、
またＳｉＯ2 、Ａｌ2Ｏ3 などのセラミックス微粒子、
ＴｉＯ2 、ＢａＣｒＯ4 などの酸化物、アクリル樹脂な
どの有機高分子をめっき層中に分散させたものがある。
めっき付着量としては、０．５〜１００ｇ／ｍ2 で広範
囲の用途に適用することができる。
【０００７】このように電気亜鉛系めっきを施した、め
っき鋼帯を洗浄装置として例えば、洗浄水の散水装置、
洗浄水を満たしたタンクへ導き、洗浄によりめっき液等
を除去した後、潤滑性向上用酸化膜を生成せしめて潤滑
性等を向上させる。
【０００８】上記のごとく洗浄した電気亜鉛系めっき鋼
板の表面は、亜鉛やアルミニウム等のめっき層合金元素
の酸化皮膜が形成されており、こような皮膜が形成され
ていても潤滑性向上用酸化膜としての無機系酸化物皮膜
の形成はできプレス性、化成処理性は向上する。しかし
ながら、接着剤の接着強度は、亜鉛やアルミニウム等の
めっき層合金元素の酸化皮膜が形成されているめっき鋼
板に、無機系酸化物皮膜を形成した場合と、亜鉛やアル
ミニウム等の酸化物が形成されていない表面に、無機系
酸化物皮膜を形成した場合とでは、後者が格段に優れて
いることを見出した。この原因はあきらかではないが以
下のごとく推定している。亜鉛やアルミニウム等の酸化
物が形成されていない表面に、無機系酸化物皮膜を形成
した場合は、無機系酸化物皮膜の形成時にめっき層表面
を均一にエッチングし皮膜の形成がなされるため、めっ
き層と皮膜の密着性は良好となる。しかし、亜鉛やアル
ミニウム等の酸化皮膜が形成されている表面に、無機系
酸化物皮膜を形成した場合は、無機系酸化物皮膜は薄
く、また無形成部分でめっき層をエッチングした後、酸
化物皮膜表面に沈着した状態で均一に形成される。従っ
てプレス性は、この無機系酸化物皮膜の被覆効果による
ため、化成処理性は酸化皮膜及び酸化物皮膜の何れも化
成処理液に完全に溶解し、化成処理皮膜の形成が可能と
なり効果に差異はないが、接着剤の接着強度において
は、酸化皮膜と無機系酸化物皮膜の間の結合力が確保で
きないため低下するものと考えられる。
【０００９】即ち、本発明においては、無機系酸化物皮
膜形成後の電気亜鉛系めっき鋼板の潤滑性の向上を一層
高めるためには、酸化皮膜と無機系酸化物皮膜の皮膜結
合力低下を回避するために、前記のごとく洗浄後の電気
亜鉛系めっき鋼板を活性化処理装置へ導き、めっき鋼板
の表面を活性化することが好ましい。
【００１０】上記のごとき、活性化処理装置では電気亜
鉛系めっき鋼板の表面に生成した酸化皮膜と無機系酸化
物皮膜の皮膜結合力低下を回避するものであり、めっき
層表面を活性化して後述のごとく、無機系酸化物皮膜を
生成せしめることにより、めっき層をエッチングして皮
膜に供給されるＺｎやめっき層合金元素の酸化物や水酸
化物と一体化をはかるものである。活性化する方法とし
ては、アルカリ水溶液で洗浄する方法、酸性水溶液で洗
浄する方法、研削等のごとくブラッシングする方法があ
る。
【００１１】上記のごとく洗浄後または活性化後の電気
亜鉛系めっき鋼帯を潤滑性向上用酸化膜生成装置へ導
き、めっき鋼板表面に潤滑性向上用酸化膜として、例え
ばMn、Mo、P 、Co、Ca、Ni、W 、V 、B の１種または２
種以上からなる無機系酸化物を生成する。このような酸
化物は、クロメート皮膜と同様ガラス状の皮膜となりプ
レス時に、めっきのダイスへのかじりを抑制し摺動性を
良好にする。更にクロメート皮膜と異なり化成処理液に
完全に溶解し、均一に化成処理皮膜を形成するととも
に、これらの成分は、化成処理液の含有成分でもあり化
成処理液を汚染しない。このような無機系酸化物の構造
は、Mn、Mo、Co、Ca、Ni、W 、V とめっき層をエッチン
グして皮膜に供給されるZnやめっき層合金元素の酸化物
や水酸化物、リン酸塩、硫酸塩、硝酸塩、ホウ酸塩等が
複合したものと考えられ、Mn−O 結合、その他金属−O
結合、P −O 結合、B −O 結合からなるネットワークが
主体で、部分的に−OH 、CO3 基等が、更にはめっき層
から供給される金属が置換したアモルファス状の巨大分
子構造であろうと推定している。また、このような酸化
物は油による洗浄工程、脱脂工程でも溶解しないので、
プレス時の潤滑性能の低下、他工程にほとんど負荷を及
ぼさない。
【００１２】このような酸化物の電気亜鉛系めっき鋼板
への生成は、例えばめっき鋼板を水溶液中へ浸漬する
か、水溶液を散布する等により塗布すること、及び電解
処理によって確実に生成することができる。このときに
は亜鉛系めっき鋼板の合金元素（金属）及び水溶液中の
不純物が、若干酸化物中に混入するが障害にはならな
い。また皮膜中に混入しても障害にならない元素として
は、Li、Be、C 、F 、Na、Mg、Al、Si、Cl、K 、Ca、N
i、Mo、V 、W 、Ti、Fe、Rb、Sr、Y 、Zn、Nb、Cs、B
a、ランタニド類のイオンや酸化物、水酸化物、リン酸
塩、硫酸塩硝酸塩等はある程度（皮膜中に約１０％以
下）混入しても影響はない。さらにCr、Cd、Pb、Sn、As
は微量であれば、化成処理性や化成処理液への汚染に影
響はなく効果は変わらない。
【００１３】次に、無機系酸化物の生成範囲としては、
金属量で１mg/m2あればよいが、500mg/m2を越えると自
動車、家電のユーザーで施す化成処理において、皮膜の
溶解が遅くなり化成処理皮膜の形成が不安定となるので
好ましくない。従って１〜５００ mg/m2、好ましくは１
〜２００mg/m2である。
【００１４】上記のごとき無機系酸化物の生成方法とし
ては、例えばMn系酸化物としては、過マンガン酸カリウ
ム、リン酸、ホウ酸ナトリウム、モリブデン酸アンモニ
ウム、リンモリブデン酸、タングステン酸アンモニウ
ム、リンタングステン酸、ケイタングステン酸、バナジ
ン酸アンモニウム、コバルト、ニッケル、カルシウム等
の塩化物、硫酸塩あるいはリン酸塩として１ｇ／ｌ〜溶
解限、反応を促進するためリン酸、硫酸、硝酸、塩酸、
フッ化物等を添加した浴を用いることができる。
【００１５】このようにして、めっき鋼板表面に潤滑性
向上用酸化膜を生成した後、乾燥装置へ導き、温風また
は電熱あるいは加熱ロールとの接触により、酸化膜中の
水分を除去するものである。また場合によっては、潤滑
性向上用酸化膜生成後、乾燥に先立ち洗浄装置を設け、
水洗、湯洗等により洗浄することもできる。
【００１６】上記のごとく、生成せしめた無機系酸化物
を熟成することによって無機系酸化物との化合物の脱水
縮合反応（架橋反応）と還元反応が同時に起こり、酸化
物を中性またはアルカリで難溶解性に還元することから
プレス後の脱脂処理に際し、酸化物の液中への溶出を確
実に抑制できることから酸化物の溶出による脱脂液の汚
染を抑制し、脱脂液の寿命及び廃水処理の負荷を軽減す
ることができる。その熟成方法としては、前記のごとき
無機系酸化物の乾燥に際し、加熱保持することによって
確実に熟成することができる。即ち、無機系酸化物中の
水分除去ご十分に加熱することによって熟成することが
でき、鋼板の加熱保持温度としては４０〜５００℃、１
〜４８時間で確実に熟成することができる。このような
熟成処理は、例えば無機系酸化物生成後に洗浄（リン
ス）した場合は、無機系酸化物の表面部に不均質な酸化
物が洗い流されており、熟成に必要性はないが、無機系
酸化物生成後の洗浄（リンス）を省略した場合は、不均
質な酸化物が残存しており熟成することが好ましい。従
って乾燥にとどめるか、熟成するかは必要に応じて行う
ものである。なお前記のごとき、乾燥装置に次いで、ク
ロメート装置、有機皮膜塗布装置等の後処理装置を設け
ることにより、後処理も同一設備で処理できるので生産
性等を高めることができ、極めて好ましいことである。
【００１７】
【実施例】次に本発明の実施例を挙げる。
実施例１
図１において、鋼板前処理装置１へ鋼帯（板）２を導
き、鋼帯２表面の圧延油、酸化物等を除去して清浄化し
た後、電気亜鉛系めっき装置３へ導入して電気亜鉛系め
っきを施し、電気亜鉛系めっき鋼帯２とする、次いで洗
浄水を満たしたタンクからなる洗浄装置４へ導き、めっ
き鋼帯２を洗浄した後、潤滑性向上用酸化膜生成装置５
へ導き、潤滑性向上用酸化膜を生成する、しかる後乾燥
装置６で潤滑性向上用酸化膜中の水分を除去し、簡易防
錆油を塗布しコイル状に捲取り製品とする。
実施例２
図１において、鋼板前処理装置１へ鋼帯（板）２を導
き、鋼帯２表面の圧延油、酸化物等を除去して清浄化し
た後、電気亜鉛系めっき装置３へ導入して電気亜鉛系め
っきを施し、電気亜鉛系めっき鋼帯２とする、次いで洗
浄水を満たしたタンクからなる洗浄装置４へ導き、めっ
き鋼帯２を洗浄した後、活性化装置７へ導きめっき鋼帯
２表面の酸化物を除去し活性化後、潤滑性向上用酸化膜
生成装置５へ導き、潤滑性向上用酸化膜を生成する、し
かる後乾燥装置６で潤滑性向上用酸化膜中の水分を除去
し、簡易防錆油を塗布しコイル状に捲取り製品とする。
【００１８】
【発明の効果】本発明によれば、電気亜鉛系めっき鋼帯
（板）にプレス性、化成処理性に優れた潤滑性向上用酸
化膜を連続的に安定して、生成することができ工業的規
模で高品質のプレス性、化成処理性に優れた電気亜鉛系
めっき鋼帯（板）を量産することができるので、工業的
に大きな効果を奏することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for producing electro-galvanized steel sheet having excellent lubricity. 2. Description of the Related Art Mn,
JP-A-4-88176 discloses that a P oxide or the like is formed to improve lubricity (pressability) and chemical conversion treatment. Such a surface-treated steel sheet has improved slidability in press formability more than that of a cold-rolled steel sheet, and has no pressing flaws at the time of forming, and has no oxide peeling or the like, and has excellent chemical conversion property. It is a thing. [0003] As described above, electrogalvanized steel sheet is excellent in lubricity and chemical conversion treatment,
In fact, the momentum adopted by automobile manufacturers and home appliance manufacturers is increasing. However, when employed (used) by automobile manufacturers, it is necessary to stably supply a large quantity of electrogalvanized steel sheets with high quality and excellent lubricity due to the huge amount of use. Obviously. However, as described above, electro-galvanized steel sheet excellent in lubricity and the like is a new product, there is no equipment for stable production on an industrial scale, therefore, at present, stable in large quantities There are issues such as inability to supply. The present invention has been made to advantageously solve such problems, and it is an object of the present invention to provide a facility for stably producing an electrogalvanized steel sheet having excellent lubricity as described above on an industrial scale. It is the purpose. [0004] The features of the present invention are characterized in that a steel sheet pretreatment device, an electrogalvanizing device, a cleaning device, and an oxide film are not formed on the surface of the plating layer.
Activation treatment device to make surface and surface after activation
This is a manufacturing facility for an electro-galvanized steel sheet having excellent lubricity, which is provided with a lubrication-improving oxide film generation device for uniformly forming an inorganic oxide film and a drying device. [0005] As a steel sheet pretreatment apparatus, a steel strip (steel sheet) is continuously guided to a steel sheet pretreatment apparatus, and washed with an alkaline aqueous solution of pH 10 or more such as sodium orthosilicate, sodium tantalate, and caustic soda. Is preferred. When the pH is less than about 10, removal of oxides generated on the surface of the galvanized steel sheet may be insufficient, and it may take a long time to remove the oxide, which may affect productivity. Absent.
The electrogalvanized steel sheet can be washed by immersing it in such an alkaline aqueous solution or by electrolytic treatment in an alkaline aqueous solution. Washing is performed as described above with an acidic aqueous solution such as hydrochloric acid or sulfuric acid. As described above, the cleaned steel strip is led to an electro-galvanizing apparatus, and the steel strip is used as a cathode and an electrode is used as an anode in an electroplating solution by a vertical or horizontal electroplating apparatus to conduct galvanizing. Is applied. The electrogalvanized steel sheet includes, for example, aluminum containing zinc as a main component. The plating composition is pure Zn, Zn and Fe, Zn and Ni, Zn and Al, Zn and Mn, Zn and C
r, Zn and Ti, Zn and Mg such as Mg as main components,
Alternatively, for improving various functions such as corrosion resistance, Fe, Ni, C
o, Al, Pb, Sn, Sb, Cu, Ti, Si, B,
Contains one or more alloying elements and impurity elements such as P, N, S and O, ceramic fine particles such as SiO 2 and Al 2 O 3 , oxides such as TiO 2 and BaCrO 4 , acrylic resin, etc. Some organic polymers are dispersed in the plating layer, and some have a single composition in the thickness direction of the plating layer, and some have a composition that changes continuously or in a layered manner.
Further, in the multi-layer plated steel sheet, besides pure Zn, Zn and Fe, Zn and Ni, Zn and Al,
Containing Zn and Mn, Zn and Cr, Zn and Ti, Zn and Mg as main components, one or more alloy elements and impurity elements for improving various functions such as corrosion resistance,
Ceramic fine particles such as SiO 2 and Al 2 O 3 ;
There is one in which an oxide such as TiO 2 or BaCrO 4 or an organic polymer such as an acrylic resin is dispersed in a plating layer.
The plating adhesion amount is 0.5 to 100 g / m 2 and can be applied to a wide range of applications. As described above, the galvanized steel strip coated with electrogalvanized steel is used as a washing device, for example, a sprinkler for washing water,
After leading to a tank filled with washing water and removing the plating solution and the like by washing, an oxide film for improving lubricity is formed to improve the lubricity and the like. [0008] The surface of the electrogalvanized steel sheet washed as described above has an oxide film of a plating layer alloy element such as zinc or aluminum formed thereon. An inorganic oxide film as a film can be formed, and pressability and chemical conversion treatment are improved. However, the adhesive strength of the adhesive is different between the case where an inorganic oxide film is formed on a plated steel sheet on which an oxide film of a plating layer alloy element such as zinc or aluminum is formed, and the case where an oxide such as zinc or aluminum is formed. In the case where an inorganic oxide film was formed on a surface that was not formed, the latter was found to be significantly superior. The cause is not obvious, but is estimated as follows. If an inorganic oxide film is formed on a surface where oxides such as zinc and aluminum are not formed, the coating is formed by uniformly etching the plating layer surface when the inorganic oxide film is formed. The adhesion between the plating layer and the film is good. However, when an inorganic oxide film is formed on the surface where an oxide film such as zinc or aluminum is formed, the inorganic oxide film is thin, and after the plating layer is etched in the non-formed portion, the oxide film is removed. Formed uniformly on the surface of the coating. Therefore, the pressability is due to the coating effect of the inorganic oxide film, so that the chemical conversion treatment completely dissolves both the oxide film and the oxide film in the chemical conversion solution, and the formation of the chemical conversion film becomes possible. However, the adhesive strength of the adhesive is considered to decrease because the bonding force between the oxide film and the inorganic oxide film cannot be secured. That is, in the present invention, in order to further improve the lubricity of the electrogalvanized steel sheet after the formation of the inorganic oxide film, it is necessary to avoid a decrease in the bonding strength between the oxide film and the inorganic oxide film. In order to do so, it is preferable that the electrogalvanized steel sheet after cleaning is guided to the activation treatment device as described above to activate the surface of the coated steel sheet. [0010] In the activation treatment apparatus as described above, the reduction of the film bonding force between the oxide film and the inorganic oxide film formed on the surface of the electro-galvanized steel sheet is avoided. As described above, by forming an inorganic oxide film, the plating layer is etched to integrate with Zn or an oxide or hydroxide of a plating layer alloy element supplied to the film. As a method for activation, there are a method of washing with an alkaline aqueous solution, a method of washing with an acidic aqueous solution, and a method of brushing such as grinding. [0011] As described above, the electro-zinc-coated steel strip after cleaning or activation is led to an oxide film generating apparatus for improving lubricity, and as an oxide film for improving lubricity, for example, Mn, Mo, P, One or two of Co, Ca, Ni, W, V and B
An inorganic oxide composed of at least one species is produced. Such an oxide becomes a glassy film similarly to the chromate film, and suppresses galling of the plating during pressing and improves the slidability. Further, unlike the chromate film, it is completely dissolved in the chemical conversion treatment solution to form a uniform chemical conversion treatment film, and these components are also contained in the chemical conversion treatment solution and do not contaminate the chemical conversion treatment solution. The structure of such an inorganic oxide includes Mn, Mo, Co, Ca, Ni, W, V, and Zn or a plating layer alloy element oxide or hydroxide supplied to the film by etching the plating layer, It is considered that phosphates, sulfates, nitrates, borates, etc. are complex, and Mn-O bond, other metal -O
It is mainly composed of a network consisting of bonds, P-O bonds and B-O bonds, and has an amorphous macromolecular structure in which -OH, CO 3 groups, etc. are partially replaced by metals supplied from the plating layer. It is estimated that. In addition, since such oxides do not dissolve even in the washing step and the degreasing step with oil,
Deterioration of lubrication performance at the time of pressing and hardly affect other processes. The formation of such an oxide on an electrogalvanized steel sheet can be achieved, for example, by dipping the steel sheet in an aqueous solution or by spraying the aqueous solution and applying it, and reliably by electrolysis. it can. At this time, the alloy element (metal) of the zinc-based plated steel sheet and the impurities in the aqueous solution slightly mix into the oxide, but do not cause any obstacle. Elements that do not cause an obstacle even if mixed into the film include Li, Be, C, F, Na, Mg, Al, Si, Cl, K, Ca, N
i, Mo, V, W, Ti, Fe, Rb, Sr, Y, Zn, Nb, Cs, B
a, There is no effect even if lanthanide ions, oxides, hydroxides, phosphates, sulfate nitrates, etc. are mixed to some extent (about 10% or less in the film). Cr, Cd, Pb, Sn, As
If the amount is too small, there is no effect on the chemical conversion property or contamination of the chemical conversion solution, and the effect is not changed. Next, the generation range of the inorganic oxide is as follows:
It is sufficient that the amount of metal is 1 mg / m 2, but if it exceeds 500 mg / m 2 , the dissolution of the film becomes slow and the formation of the chemical conversion film becomes unstable in the chemical treatment performed by users of automobiles and home appliances, which is not preferable. Therefore, 1 to 500 mg / m 2 , preferably 1
２００200 mg / m 2 . As a method for producing the inorganic oxide as described above, for example, as the Mn-based oxide, potassium permanganate, phosphoric acid, sodium borate, ammonium molybdate, phosphomolybdic acid, ammonium tungstate, phosphotungsten Acid, silicotungstic acid, ammonium vanadate, cobalt, nickel, calcium and other chlorides, sulfates or phosphates from 1 g / l to the solubility limit, phosphoric acid, sulfuric acid, nitric acid, hydrochloric acid to promote the reaction,
A bath containing a fluoride or the like can be used. In this way, after an oxide film for improving lubricity is formed on the surface of the plated steel sheet, it is guided to a drying device, and the moisture in the oxide film is removed by contact with warm air, electric heat or a heating roll. is there. Also, in some cases, after the generation of an oxide film for improving lubricity, a cleaning device is provided prior to drying,
It can also be washed by washing with water, hot water, or the like. As described above, by aging the formed inorganic oxide, a dehydration-condensation reaction (crosslinking reaction) and a reduction reaction of the compound with the inorganic oxide occur at the same time, and the oxide is hardly neutralized or alkalinized. Since it reduces to solubility, it is possible to reliably suppress the elution of oxides into the liquid during the degreasing treatment after pressing, so that the contamination of the degreasing liquid due to the elution of oxides is suppressed, the life of the degreasing liquid and the burden of wastewater treatment Can be reduced. As for the aging method, it is possible to surely ripen the inorganic oxide by heating and holding it when drying the inorganic oxide as described above. That is, it can be matured by sufficiently heating to remove moisture in the inorganic oxide, and the heating and holding temperature of the steel sheet is 40 to 500 ° C.,
Ripening can be ensured in 48 hours. In such an aging treatment, for example, when washing (rinsing) is performed after the formation of the inorganic oxide, the heterogeneous oxide is washed away on the surface of the inorganic oxide, and there is no necessity for aging. When the washing (rinsing) after the generation of the system oxide is omitted, it is preferable that the heterogeneous oxide remains and ripening is performed. Therefore, whether to keep it dry or to ripen it depends on necessity. In addition, as described above, by providing a post-treatment device such as a chromate device and an organic film coating device next to the drying device, post-treatment can be performed by the same equipment, so that productivity and the like can be increased, which is extremely preferable. . Next, examples of the present invention will be described. Example 1 In FIG. 1, a steel strip (plate) 2 was guided to a steel sheet pretreatment apparatus 1, and after removing rolling oil, oxides and the like on the surface of the steel strip 2 and cleaning the same, the steel strip 2 was introduced into an electrogalvanizing apparatus 3. And then electrogalvanized to form an electrogalvanized steel strip 2, and then led to a cleaning device 4 consisting of a tank filled with cleaning water to wash the galvanized steel strip 2 and then to form an oxide film for improving lubricity. Device 5
Then, an oxide film for improving the lubricity is generated. Thereafter, the moisture in the oxide film for improving the lubricity is removed by the drying device 6, and a simple rust-preventive oil is applied to obtain a coiled product. Example 2 In FIG. 1, a steel strip (plate) 2 was guided to a steel sheet pretreatment device 1, and after removing rolling oil, oxides, and the like on the surface of the steel strip 2, the steel strip 2 was cleaned and introduced into an electrogalvanizing apparatus 3. And then electrogalvanized to form an electrogalvanized steel strip 2, and then led to a cleaning device 4 consisting of a tank filled with cleaning water, and after cleaning the plated steel strip 2, led to an activation device 7 for plating. After the oxide on the surface of the steel strip 2 is removed and activated, it is led to an oxide film generating device 5 for improving lubricity, thereby generating an oxide film for improving lubricity. After removing the water, a simple rust-preventive oil is applied to form a coiled product. According to the present invention, it is possible to continuously and stably form an oxide film for improving lubricity on a galvanized steel strip (plate) having excellent pressability and chemical conversion treatment properties. As a result, it is possible to mass-produce an electrogalvanized steel strip (plate) having an excellent quality on pressability and chemical conversion treatment on an industrial scale, so that a great effect can be obtained industrially.
【図面の簡単な説明】 【図１】本発明の実施例を示すフロー図である。 【図２】本発明の実施例を示すフロー図である。 【符号の説明】 １ 鋼板前処理装置 ３ 電気亜鉛系めっき装置 ４ 洗浄装置 ５ 潤滑性向上用酸化膜生成装置 ６ 乾燥装置 ７ 活性化装置[Brief description of the drawings] FIG. 1 is a flowchart showing an embodiment of the present invention. FIG. 2 is a flowchart showing an embodiment of the present invention. [Explanation of symbols] 1 Steel plate pretreatment equipment 3 Electric zinc-based plating equipment 4 Cleaning equipment 5 Oxide film generator for improving lubricity 6 Drying equipment 7 Activation device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小川 裕 愛知県東海市東海町５−３ 新日本製鐵 株式会社名古屋製鐵所内 (56)参考文献 特開 昭63−125695（ＪＰ，Ａ) 特開 昭57−85990（ＪＰ，Ａ) 特開 平８−325791（ＪＰ，Ａ) 特開 平８−325689（ＪＰ，Ａ) 特開 平６−116746（ＪＰ，Ａ) 特開 平５−230611（ＪＰ，Ａ) 特開 平４−99880（ＪＰ，Ａ) 特開 平４−88176（ＪＰ，Ａ) 特開 平３−243751（ＪＰ，Ａ) 特開 平２−258984（ＪＰ，Ａ) 実開 平３−78050（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) C25D 5/48 C23C 2/26 C23C 28/00 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Ogawa 5-3 Tokai-cho, Tokai City, Aichi Prefecture Nippon Steel Corporation Nagoya Works (56) References JP-A-63-125695 (JP, A) JP-A-57-85990 (JP, A) JP-A-8-325791 (JP, A) JP-A-8-325689 (JP, A) JP-A-6-116746 (JP, A) JP-A-5-230611 ( JP, A) JP-A-4-99880 (JP, A) JP-A-4-88176 (JP, A) JP-A-3-2433751 (JP, A) JP-A-2-258984 (JP, A) Hei 3-78050 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) C25D 5/48 C23C 2/26 C23C 28/00
Claims (1)
置と、洗浄装置と、めっき層表面を酸化皮膜が形成され
ていない表面とするための活性化処理装置と、活性化後
の表面に無機系酸化物皮膜を均一に形成するための潤滑
性向上用酸化膜生成装置と、乾燥装置を連設したことを
特徴とする潤滑性に優れた電気亜鉛系めっき鋼板の製造
設備。(57) [Claims] [Claim 1] A steel sheet pretreatment device, an electrogalvanizing device, a cleaning device, and an oxide film formed on a surface of a plating layer.
Activation treatment device to make the surface uncleaned and after activation
An equipment for producing electro-galvanized steel sheet having excellent lubricity, characterized by connecting an oxide film generator for improving lubricity to form an inorganic oxide film uniformly on the surface of the steel sheet and a drying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13170295A JP3435255B2 (en) | 1995-05-30 | 1995-05-30 | Manufacturing equipment for electro-galvanized steel sheet with excellent lubricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13170295A JP3435255B2 (en) | 1995-05-30 | 1995-05-30 | Manufacturing equipment for electro-galvanized steel sheet with excellent lubricity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08325789A JPH08325789A (en) | 1996-12-10 |
| JP3435255B2 true JP3435255B2 (en) | 2003-08-11 |
Family
ID=15064213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13170295A Expired - Lifetime JP3435255B2 (en) | 1995-05-30 | 1995-05-30 | Manufacturing equipment for electro-galvanized steel sheet with excellent lubricity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3435255B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007024295A (en) * | 2005-07-21 | 2007-02-01 | Ntn Corp | Cage for rolling bearing, and rolling bearing |
| CN103526275A (en) * | 2013-10-17 | 2014-01-22 | 贵州钢绳股份有限公司 | Acid-free electrolytic cleaning fluid and application thereof in bethanizing production line |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5785990A (en) * | 1980-11-19 | 1982-05-28 | Kawasaki Steel Corp | Polishing method for surface of zinc electroplated steel plate |
| JPS63125695A (en) * | 1986-11-14 | 1988-05-28 | Sumitomo Metal Ind Ltd | Production of zn alloy electroplated steel sheet |
| JPH02258984A (en) * | 1989-03-30 | 1990-10-19 | Nippon Steel Corp | Equipment for producing electrogalvanized steel sheet having excellent weldability |
| JPH0627645Y2 (en) * | 1989-11-30 | 1994-07-27 | 新日本製鐵株式会社 | Hot-dip galvanizing line starting from hot rolled coil |
| JPH0711070B2 (en) * | 1990-07-31 | 1995-02-08 | 新日本製鐵株式会社 | Galvanized steel sheet with excellent weldability, pressability and chemical conversion treatment |
| JPH079055B2 (en) * | 1990-02-21 | 1995-02-01 | 新日本製鐵株式会社 | Method for producing galvannealed steel sheet |
| JP2819429B2 (en) * | 1990-08-13 | 1998-10-30 | 新日本製鐵株式会社 | Galvanized steel sheet with excellent press formability and chemical conversion properties |
| JP2653315B2 (en) * | 1992-02-20 | 1997-09-17 | 住友金属工業株式会社 | Manufacturing method of galvanized steel sheet with excellent weldability |
| JP3060055B2 (en) * | 1992-10-06 | 2000-07-04 | 日本鋼管株式会社 | Galvanized steel sheet excellent in spot weldability, press formability and chemical conversion property, and method for producing the same |
| CA2175105C (en) * | 1995-05-23 | 1999-09-21 | C. Ramadeva Shastry | Process for improving the formability and weldability properties of zinc coated steel sheet |
| JPH08325689A (en) * | 1995-05-30 | 1996-12-10 | Nippon Steel Corp | Equipment for manufacturing hot dip galvanized hot rolled steel sheet excellent in lubricity and chemical conversion |
-
1995
- 1995-05-30 JP JP13170295A patent/JP3435255B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08325789A (en) | 1996-12-10 |
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