JPH01162795A - Zinc-chromium double-electroplated steel sheet - Google Patents
Zinc-chromium double-electroplated steel sheetInfo
- Publication number
- JPH01162795A JPH01162795A JP31983187A JP31983187A JPH01162795A JP H01162795 A JPH01162795 A JP H01162795A JP 31983187 A JP31983187 A JP 31983187A JP 31983187 A JP31983187 A JP 31983187A JP H01162795 A JPH01162795 A JP H01162795A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- layer
- corrosion resistance
- plating
- electroplated 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 15
- 239000010959 steel Substances 0.000 title claims abstract description 15
- DQIPXGFHRRCVHY-UHFFFAOYSA-N chromium zinc Chemical compound [Cr].[Zn] DQIPXGFHRRCVHY-UHFFFAOYSA-N 0.000 title claims 2
- 238000007747 plating Methods 0.000 claims abstract description 32
- 239000011651 chromium Substances 0.000 claims description 33
- 239000000956 alloy Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 abstract description 20
- 230000007797 corrosion Effects 0.000 abstract description 20
- 150000002500 ions Chemical class 0.000 abstract description 11
- 229910052725 zinc Inorganic materials 0.000 abstract description 10
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 238000009713 electroplating Methods 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract description 3
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract description 2
- 229910001297 Zn alloy Inorganic materials 0.000 abstract 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000011701 zinc Substances 0.000 description 15
- 229910019142 PO4 Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 7
- 239000010452 phosphate Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910007567 Zn-Ni Inorganic materials 0.000 description 2
- 229910007614 Zn—Ni Inorganic materials 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910007564 Zn—Co Inorganic materials 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000004780 naphthols Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 150000003458 sulfonic acid derivatives Chemical class 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、自動車、家電、建材等に使用される耐食性お
よび塗装適合性に優れた防錆用の複層電気めっき鋼板に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multilayer electroplated steel sheet for rust prevention, which is used in automobiles, home appliances, building materials, etc. and has excellent corrosion resistance and paint compatibility.
（従来の技術）
ＺｎないしＺｎ系合金めっき中にＣｒを含有せしめた電
気めっき鋼板としては、例えば特公昭６１−３６０７８
号、特公昭５Ｂ−５６０３９号２特開昭６１−２７０３
９８号等が公知であるが、Ｃｒの共析率が０．００５〜
５％までの極めて微量であって、耐食性にとってＣｒの
効果は付随的でしかあり得ない。従って耐食性を改善す
る目的からは更に高含量のＣｒを共析させることが強く
望まれるところである。(Prior art) As an electroplated steel sheet containing Cr in Zn or Zn-based alloy plating, for example, Japanese Patent Publication No. 61-36078
No., JP 5B-56039 No. 2, JP 61-2703
No. 98 etc. are known, but the eutectoid rate of Cr is 0.005 to
In extremely small amounts of up to 5%, the effect of Cr on corrosion resistance can only be incidental. Therefore, for the purpose of improving corrosion resistance, it is strongly desired to eutectoid a higher content of Cr.
（発明が解決しようとする問題点）
しかしながら、従来Ｃｒ共析率を高め得るＺｎ−Ｃｒ電
気めっき技術がなかった。即ち、単にめっき浴中の３価
Ｃｒイオン濃度を高めても、密着性のある正常なめっき
が得られず、電流効率も急減する等の障害があって、工
業的にＣｒ共析率を高めることは極めて困難であった。(Problems to be Solved by the Invention) However, conventionally there has been no Zn-Cr electroplating technology capable of increasing the Cr eutectoid rate. That is, even if the concentration of trivalent Cr ions in the plating bath is simply increased, normal plating with adhesion cannot be obtained, and there are problems such as a sudden decrease in current efficiency, and it is difficult to increase the Cr eutectoid rate industrially. This was extremely difficult.
本発明者らはＣｒ含有率の高いＺｎ−Ｃｒ系電るにつれ
、塗装前処理として常用される化成処理において、リン
酸塩皮膜が不完全にしか形成されないため、塗装後の耐
食性がめつき層自身の効果によって若干改善されるもの
の、それほど大巾な改善は期待できなかった。The present inventors discovered that as Zn-Cr systems with high Cr content are developed, the phosphate film is only incompletely formed in the chemical conversion treatment commonly used as a pre-painting treatment. Although there was some improvement due to the effects of
本発明は上記問題点に鑑みなされたもので、塗装後の耐
食性を大巾に改善させた電気めっき鋼板を提供する。The present invention was made in view of the above problems, and provides an electroplated steel sheet whose corrosion resistance after painting is greatly improved.
（問題点を解決するための手段）
本発明は、Ｃｒ５〜４０％を含有するＺｎ−Ｃｒ系電気
めっき層を内層とし、外層をＺｎまたはＺｎを主体とす
る合金めっき層から構成される亜鉛−クロム系複層電気
めっき鋼板である。(Means for Solving the Problems) The present invention has a zinc-Cr electroplated layer containing 5 to 40% Cr as an inner layer, and an outer layer consisting of Zn or an alloy plating layer mainly composed of Zn. It is a chromium-based multilayer electroplated steel sheet.
（作 用）
本復層めっき鋼板の耐食性は、主としてＺｎ−Ｃｒ系電
気めっき層の作用である。Ｚｎ−Ｃｒ系めっき層中のＣ
ｒの含有量は、５％以上が好ましい。５％未満では耐食
性効果は顕著ではない。例えば塩水噴霧試験によれば、
Ｃｒ含有量５％以上になると赤錆発生が大巾に抑制され
、７％以上になると、１ケ月間の試験で赤錆がほとんど
発生しない程度の驚くべき耐食性が認められる。(Function) The corrosion resistance of the present double-layer plated steel sheet is mainly a function of the Zn-Cr electroplated layer. C in Zn-Cr based plating layer
The content of r is preferably 5% or more. If it is less than 5%, the corrosion resistance effect is not significant. For example, according to the salt spray test,
When the Cr content is 5% or more, the occurrence of red rust is greatly suppressed, and when the Cr content is 7% or more, surprising corrosion resistance is observed to the extent that almost no red rust occurs during a one-month test.
このような高耐食性は、従来公知のＺｎめっき、あるい
はＺｎ−Ｆｅ、Ｚｎ−Ｎｉ等の合金めっきでは到底達成
することはできない。Such high corrosion resistance cannot be achieved by conventionally known Zn plating or alloy plating such as Zn-Fe or Zn-Ni.
ＣｒはＺｎとの共存下では不働態化せず、Ｚｎとともに
犠牲防食作用に加担し、しかもＣｒの腐食生成物が難溶
性の保護皮膜として腐食部に沈積することにより腐食を
抑制していることが、高耐食性を発揮する理由であろう
と考えられる。Cr does not passivate when coexisting with Zn, but participates in the sacrificial anticorrosion effect together with Zn, and furthermore, corrosion products of Cr deposit in the corroded areas as a poorly soluble protective film, thereby suppressing corrosion. This is thought to be the reason why it exhibits high corrosion resistance.
Ｃｒ含有量が４０％を越えると、耐食性はあるものの、
プレス加工等の加工時にめっき層が剥離する所謂ゆるパ
ウダリング性が劣化するため、実用上は適用が難しい。When the Cr content exceeds 40%, although it has corrosion resistance,
It is difficult to apply it practically because the so-called powdering property, in which the plating layer peels off during processing such as press working, deteriorates.
外層のＺｎまたはＺｎを主体とする合金めっき層は、化
成処理において健全なリン酸塩皮膜を形成する作用をも
つ。その結果、塗装後の耐食性を向上させる効果をもつ
。内層のＺｎ−Ｃｒめっき層が化成処理中に表面に露出
しなければ良いのであって、そのためには外層の目付量
は１〜１５ｇ／ｒｒｆあることが好ましい。Ｚｎを主体
とする合金めっき層としては、Ｚｎ−Ｆｅ、Ｚｎ−Ｎｉ
。The outer Zn or Zn-based alloy plating layer has the effect of forming a healthy phosphate film during chemical conversion treatment. As a result, it has the effect of improving corrosion resistance after painting. It is sufficient that the inner Zn-Cr plating layer is not exposed to the surface during the chemical conversion treatment, and for this purpose, the outer layer preferably has a basis weight of 1 to 15 g/rrf. As the alloy plating layer mainly composed of Zn, Zn-Fe, Zn-Ni
.
Ｚｎ−Ｍｎ、Ｚｎ−Ｃｏ等であり、Ｚｎは６０％以上で
よく、これらはいづれもＺｎめっきと同様に、スプレー
型あるいは浸漬型リン酸塩処理において、健全で性能の
良いリン酸塩皮膜を形成でき、それはクロレートあるい
はフッ化物等の促進剤の種類を問わない。These include Zn-Mn, Zn-Co, etc., and the Zn content may be 60% or more, and all of these can produce a healthy and high-performance phosphate film in spray-type or immersion-type phosphate treatment, similar to Zn plating. can be formed regardless of the type of promoter such as chlorate or fluoride.
該外層には、上記金属の他少量のＳｎ、Ｃｄ。The outer layer contains small amounts of Sn and Cd in addition to the above metals.
Ａｌ２．Ｐｂ、Ｃｕ、Ａｇ、Ｐ、Ｃ，Ｏ，Ｓｂ。Al2. Pb, Cu, Ag, P, C, O, Sb.
Ｔｉ等を含んでもよく、Ｃｒでさえ、約１％程度なら許
容できる。また必要なら、酸化物等の共析も許容できる
。It may contain Ti, etc., and even Cr is permissible in an amount of about 1%. Furthermore, if necessary, eutectoid deposition of oxides etc. is also acceptable.
次に製造態様について説明する。Next, the manufacturing mode will be explained.
Ｚｎ−Ｃｒ系内層のめっき法は、Ｚｎイオン。The plating method for the Zn-Cr inner layer is Zn ion.
３価ＣｒイオンおよびＣｒ析出促進剤を含む酸性めっき
浴から、電流密度５０Ａ／ｄｒｄ以上でＣｒ５〜４０％
含有するＺｎ−Ｃｒめっきを電析させることができる。From an acidic plating bath containing trivalent Cr ions and a Cr precipitation promoter, 5 to 40% Cr is removed at a current density of 50 A/drd or more.
The contained Zn-Cr plating can be electrodeposited.
Ｃｒ析出促進剤としては、例えばポリエチレングリコー
ル、アルキルポリエチレンエーテル、ポリオキシメチレ
ン誘導体、α−エトキシレーテッドナフトールおよびあ
るいはそのスルフォン酸誘導体等のポリオキシアルキレ
ン誘導体類を０．０１〜２０ｇ／（２添加使用する。他
の態様としては、Ｓｉ。As a Cr precipitation accelerator, for example, polyoxyalkylene derivatives such as polyethylene glycol, alkyl polyethylene ether, polyoxymethylene derivatives, α-ethoxylated naphthol and/or its sulfonic acid derivative can be added at 0.01 to 20 g/(2). In another embodiment, Si.
Ａｌ、Ｚｒ、Ｔｉ、Ｓｂ、Ｓｎ、Ｃｒ、Ｍｏ、Ｃｅ等の
酸化物コロイド類を２〜２００ｇ／ｊ２添加使用するこ
とができる。まためっき層中にこれらを析出させても良
い。Oxide colloids such as Al, Zr, Ti, Sb, Sn, Cr, Mo, Ce, etc. can be added in an amount of 2 to 200 g/j2. Moreover, these may be precipitated in the plating layer.
他に電導度付与剤としてＮａ” 、に’ 、ＮＨ４”等
のアルカリ金属イオンを添加することもできる。陰イオ
ンとしては硫酸浴、塩化浴いずれも適用でき、ｐＨは０
．５〜３が適当である。In addition, alkali metal ions such as Na'', Ni'', NH4'', etc. may be added as conductivity imparting agents. Both a sulfuric acid bath and a chloride bath can be used as anions, and the pH is 0.
．． 5 to 3 is appropriate.
他に６価クロムイオン、鉄２価、３価イオン等不可避的
に共存するイオンはもちろん、Ｎｉ。There are other ions that inevitably coexist, such as hexavalent chromium ions, divalent iron, and trivalent iron ions, as well as Ni.
Ｃｏ、Ｍｎ、Ｃｕ、Ａｇ、Ｓｎ、Ｓｂ、Ｃｄ。Co, Mn, Cu, Ag, Sn, Sb, Cd.
Ｐｂ、Ｍｏ、Ａ／２．Ｍｇ等のイオンを必要あれば添加
し、まためっき層中に析出させてもよい。Pb, Mo, A/2. If necessary, ions such as Mg may be added and precipitated into the plating layer.
めっき液の流速は、鋼帯との相対速度として３０〜２０
０ ｍ／ｍｉｎ 、めっき温度は４０〜７０’Ｃが適当
である。The flow rate of the plating solution is 30 to 20% relative to the steel strip.
0 m/min and a plating temperature of 40 to 70'C are appropriate.
外層の亜鉛または亜鉛を主体とする合金めっきは、周知
の電気めっき法を適用することができる。A well-known electroplating method can be applied to the outer layer of zinc or zinc-based alloy plating.
その場合、内層めっきから持ち出されるＣｒイオンドラ
グアウドを十分水洗除去することが好ましい。外層は比
較的薄いめっきの場合には、ドライめっき法等を適用す
ることも可能である。In that case, it is preferable to thoroughly wash away the Cr ion dragaud taken out from the inner layer plating. If the outer layer is plated relatively thinly, it is also possible to apply a dry plating method or the like.
（実施例） 次に本発明の実施例を比較例とともに第１表に挙げる。(Example) Next, Examples of the present invention are listed in Table 1 along with comparative examples.
第 １ 表
注１）
′内層めっき条件は、Ｚ ｎ ２ ＋ イオン５６ｇ
／ｌ。Table 1 Note 1) 'Inner layer plating conditions are Z n 2 + ion 56g
/l.
Ｃｒ”″ イオン４４ｇ／ｊ２．Ｎａ”イオン１５ｇ／
ｌを硫酸塩として建浴、ポリエチレングリコール（分子
量＝１５００）を１ｇノ！添加したｐＨ＝２．０＋ ５
０°Ｃのめっき浴を用いて、冷延鋼板（０，７ｍ厚）に
めっき液流速６０ｍ／分、電流密度１００ Ａ／ｄＩ１
１２で実施例９の内層めっきを施こした。他の実施例及
び比較例２はそれぞれ条件を変えて製造した。Cr"" ion 44g/j2. Na” ion 15g/
Prepare a bath with 1 sulfate and 1 g of polyethylene glycol (molecular weight = 1500)! Added pH=2.0+5
Using a 0°C plating bath, a plating solution flow rate of 60 m/min and a current density of 100 A/dI1 were applied to a cold rolled steel plate (0.7 m thick).
In No. 12, the inner layer plating of Example 9 was applied. Other Examples and Comparative Example 2 were manufactured under different conditions.
注２） 外層めっき条件は周知の条件でめっきを施こした。Note 2) The outer layer was plated under well-known conditions.
このようにして製造した複層めっき鋼板を第２第２表
注、３）裸めっき鋼板の耐食性
塩水の噴霧試験（ＪＩＳ Ｚ２３７１に準拠）により７
２０ｈｒ後の赤錆発生面積％をあられす。The multi-layer plated steel sheet produced in this manner was tested in Table 2, Note 3) Corrosion resistance of bare plated steel sheet Salt water spray test (according to JIS Z2371).
Check the area percentage of red rust after 20 hours.
注４）リン酸塩処理性 浸漬型リン酸塩処理での皮膜結晶状態を評価する。Note 4) Phosphate treatability Evaluate the crystalline state of the film after immersion phosphate treatment.
Ｏ： 緻密な結晶
Δ： 粗大結晶
注５）塗装板の耐食性
浸漬型リン酸塩処理、カチオン電着塗装２０μｍを施こ
し、中塗り、水研ぎ、上塗り塗装をして総合塗膜厚８０
μｍとし、クロスカットを入れた試験片を屋外に曝露し
た。曝露期間中−週間に１回の割にて５％食塩水をサン
プル上に撒布し、１０週間後のクロスカット部の錆巾で
評価した（ｍｍ）。O: Dense crystals Δ: Coarse crystals Note 5) Corrosion resistance of the painted plate Apply dipped phosphate treatment, cationic electrodeposition coating of 20 μm, intermediate coating, water sanding, and top coating to achieve a total coating thickness of 80
A test piece with cross-cuts made in micrometers was exposed outdoors. During the exposure period - 5% saline was sprinkled on the sample once a week, and the rust width at the cross-cut portion was evaluated after 10 weeks (mm).
（発明の効果）
以上述べたように本発明によれば、高耐食性で、かつ塗
装後の耐食性にも優れた防錆用の複層電気めっき鋼板が
得られる。(Effects of the Invention) As described above, according to the present invention, a multilayer electroplated steel sheet for rust prevention that has high corrosion resistance and excellent corrosion resistance after coating can be obtained.
Claims (1)
き層を内層とし、外層をＺｎまたはＺｎを主体とする合
金めっき層から構成される亜鉛−クロム系複層電気めっ
き鋼板。(1) A zinc-chromium multilayer electroplated steel sheet comprising an inner layer of a Zn-Cr electroplated layer containing 5 to 40% of Cr, and an outer layer of Zn or an alloy plating layer mainly composed of Zn.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62319831A JPH0715153B2 (en) | 1987-12-17 | 1987-12-17 | Zinc-chromium multi-layer electroplated steel sheet |
| DE88104874T DE3882769T2 (en) | 1987-03-31 | 1988-03-25 | Corrosion-resistant plated steel strip and process for its manufacture. |
| EP88104874A EP0285931B1 (en) | 1987-03-31 | 1988-03-25 | Corrosion resistant plated steel strip and method for producing same |
| US07/174,830 US4897317A (en) | 1987-03-31 | 1988-03-29 | Corrosion resistant Zn-Cr plated steel strip |
| CA000562971A CA1336698C (en) | 1987-03-31 | 1988-03-30 | Corrosion resistant plated steel strip and method for producing same |
| AU13897/88A AU597163B2 (en) | 1987-03-31 | 1988-03-30 | Corrosion resistant plated steel strip and method for producing same |
| KR1019880003622A KR910002186B1 (en) | 1987-03-31 | 1988-03-31 | Corrosion resistant zn-cr plated steel strip |
| US07/320,071 US4877494A (en) | 1987-03-31 | 1989-03-07 | Corrosion resistant plated steel strip and method for producing same |
| CA000616732A CA1336700C (en) | 1987-03-31 | 1993-09-21 | Corrosion resistant plated steel strip and method for producing same |
| CA000616731A CA1336699C (en) | 1987-03-31 | 1993-09-21 | Corrosion resistant plated steel strip and method for producing same |
| CA000616830A CA1337054C (en) | 1987-03-31 | 1994-03-07 | Corrosion resistant plated steel strip and method for producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62319831A JPH0715153B2 (en) | 1987-12-17 | 1987-12-17 | Zinc-chromium multi-layer electroplated steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01162795A true JPH01162795A (en) | 1989-06-27 |
| JPH0715153B2 JPH0715153B2 (en) | 1995-02-22 |
Family
ID=18114699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62319831A Expired - Fee Related JPH0715153B2 (en) | 1987-03-31 | 1987-12-17 | Zinc-chromium multi-layer electroplated steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715153B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03166397A (en) * | 1989-11-24 | 1991-07-18 | Nippon Steel Corp | Highly corrosion resistant composite electroplated steel sheet excellent in chemical conversion treating property and weldability and its production |
| JPH03166396A (en) * | 1989-11-24 | 1991-07-18 | Nippon Steel Corp | Highly corrosion resistant composite electroplated steel sheet excellent in chemical conversion treating property and its production |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5891163A (en) * | 1981-11-24 | 1983-05-31 | Kobe Steel Ltd | Manufacture of composite zinc plated steel plate with superior suitability to coating |
| JPS6082691A (en) * | 1983-10-12 | 1985-05-10 | Nippon Kokan Kk <Nkk> | Multilayer plated steel sheet |
-
1987
- 1987-12-17 JP JP62319831A patent/JPH0715153B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5891163A (en) * | 1981-11-24 | 1983-05-31 | Kobe Steel Ltd | Manufacture of composite zinc plated steel plate with superior suitability to coating |
| JPS6082691A (en) * | 1983-10-12 | 1985-05-10 | Nippon Kokan Kk <Nkk> | Multilayer plated steel sheet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03166397A (en) * | 1989-11-24 | 1991-07-18 | Nippon Steel Corp | Highly corrosion resistant composite electroplated steel sheet excellent in chemical conversion treating property and weldability and its production |
| JPH03166396A (en) * | 1989-11-24 | 1991-07-18 | Nippon Steel Corp | Highly corrosion resistant composite electroplated steel sheet excellent in chemical conversion treating property and its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0715153B2 (en) | 1995-02-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |