JPH0328393A - Alloy electroplated steel sheet having superior workability - Google Patents
Alloy electroplated steel sheet having superior workabilityInfo
- Publication number
- JPH0328393A JPH0328393A JP16116989A JP16116989A JPH0328393A JP H0328393 A JPH0328393 A JP H0328393A JP 16116989 A JP16116989 A JP 16116989A JP 16116989 A JP16116989 A JP 16116989A JP H0328393 A JPH0328393 A JP H0328393A
- Authority
- JP
- Japan
- Prior art keywords
- plating film
- layer
- steel sheet
- alloy
- plating
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 239000000956 alloy Substances 0.000 title claims description 34
- 229910045601 alloy Inorganic materials 0.000 title claims description 34
- 238000007747 plating Methods 0.000 claims abstract description 69
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 3
- 150000003568 thioethers Chemical class 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 10
- 238000000576 coating method Methods 0.000 abstract description 10
- 229910001297 Zn alloy Inorganic materials 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052726 zirconium Inorganic materials 0.000 abstract description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract 1
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 abstract 1
- 238000009713 electroplating Methods 0.000 description 11
- 238000000227 grinding Methods 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 229910007567 Zn-Ni Inorganic materials 0.000 description 2
- 229910007614 Zn—Ni Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 235000002639 sodium chloride Nutrition 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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、加工性に優れた合金電気メッキ鋼板、特に自
動車用として適した防錆メッキ鋼板に関する．
（従来の技術）
近年、自動車用防錆鋼板に対する要求性能はますますき
びしくなってきている。特に、道路凍結防止用にまかれ
る岩塩による自動車車体の腐食が大きな問題となってお
り、耐孔あき性１０年保証、表面錆５年保証という目標
性能が打ち出されている．
この防錆目標を満足するために、従来用いられてきた純
Ｚｎメッキに変わり、Ｚｎ−ＮｉやＺｎ − Ｐｅ等の
Ｚｎ系合金電気メッキが採用されており、さらに最近は
耐食性を向上させるために、この合金電気メッキの目付
け量も増加する傾向がある。例えば４０ｇ ／ ｍ ｔ
というのも提案されている。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an alloy electroplated steel sheet with excellent workability, and particularly to a rust-proof plated steel sheet suitable for automobile use. (Prior Art) In recent years, the performance requirements for antirust steel sheets for automobiles have become increasingly strict. In particular, corrosion of automobile bodies due to rock salt sprinkled to prevent roads from freezing has become a major problem, and performance targets have been set for a 10-year guarantee on puncture resistance and a 5-year guarantee on surface rust. In order to meet this rust prevention goal, electroplating of Zn-based alloys such as Zn-Ni and Zn-Pe has been adopted in place of the conventionally used pure Zn plating. , the basis weight of this alloy electroplating also tends to increase. For example 40g/mt
It has been proposed that.
（発明が解決しようとする課題〉
しかし、かかる従来のＺｎ系合金電気メンキ鯛仮の欠点
は、メッキ皮膜が硬く、メッキ皮膜自身の加工変形能が
少ないことであり、このため目付け量を増加させるに伴
い、加工時にメッキ皮膜がパウダー状に剥離する、いわ
ゆるバウダリングが発生するという問題があった．通常
は、同一合金組或であればメッキ目付量の増加に伴いパ
ウダリング量が増大する．このパウダリングが発生する
と、これがプレスの型等に付着し、プレス時の押し込み
疵となる。従って、メッキの厚目付け化に伴い、いかに
バウダリング発生を低減させるかが重要な課題となる．
このような問題に対し、従来はプレス加工時に高潤滑性
のプレス油を用いる等の利用技術上の改善は行われては
いたが、メッキ皮膜そのものの改善は行われていなかっ
た．
本発明は、このような問題点を解決すべくメッキ皮膜そ
のものの改善により厚日付けでもバウダリング発生の少
ないＺｎ系合金電気メッキ鋼板を提供することを目的と
している．
（課題を解決するための手段）
上記目的を達成するため、本発明者が種々検討したとこ
ろ、厚百付とする場合、予め密着性及び加工性の高いメ
ッキ皮膜を薄目付けをすることで耐バウダリング性が大
幅に改善され、その下層の薄日付量にそのための臨界性
があることを知り、本発明に至った．
すなわち、本発明にかかる合金電気メッキ鋼板のメッキ
皮膜は次のように構成されている．まず、鋼仮表面に第
１層として、純ＺｎまたはＦｅとＮｉの含有率の合計が
１０％以下、残部がＺｎおよび不可避的不純物からなる
メッキ皮膜を０．５ ｇ／，ｘ以上２８／一以下形或す
る．この第１層メッキ皮膜はＺｎのη相単一相であれば
より好ましい．この第１層としてのメッキ皮膜の上層に
Ｚｎ系合金電気メンキ皮膜を２０ｇ／ｍ”以上６０ｇ／
ｗ”以下の目付け量で形成する．
この第ｌ層メッキ皮膜上に形成するＺｎ系合金電気メッ
キ皮膜は、特にその組或を規定するものではないが、Ｚ
ｎとＮｉＳＦｅ， Ｃｏｓ Ｃｒ−Ｃｕ等の合金メッキ
が考えられる．
本発明の別の実施ａｍによれば、このＺｎ系合金電気メ
ッキ皮膜はその中に金属の酸化物、硫化物、炭化物、ホ
ウ化物、隣化物、または硫酸塩化合物を含んだ分散メッ
キ皮膜であっても良い．なお、第ｌ層メッキ皮膜と上層
のメッキ皮膜とが同一組或の場合も考えられるが、その
場合にあってはメッキ処理を継続して全体として厚目付
とすればよい．第１層と上層との境界はみられないが、
本発明にあってはその場合にも下層の０６５〜２ｇ７１
部分を第１層と考える．しかし、通常、この上層は第１
層に比べてＦｅ， Ｎｉリッチとする．（作用〉
次に、本発明についてメッキ皮膜の限定理由を含めてさ
らに具体的に説明する．
まず本発明において用いるメッキ下地としての鋼板は特
に制限されず、例えば自動車用として使用されるものか
ら適宜選べばよい．
次に、第１層メッキ皮膜は、純Ｚｎメッキ皮膜であって
もＦｅ＋Ｎ１合計ｌＯ％以下のＺｎ合金メッキ皮膜であ
ってもよい， ＰｅとＮｉの含有率の合計が１０％以上
になるとメッキ皮膜自体が非常に硬くなるため、全くそ
の効果がなくなる．従って、合金メッキの場合ＦｅとＮ
ｉの含有率の合計を１０％以下にする必要がある．好ま
しくは、Ｚｎのη単相であればより効果的である．Ｔ相
の場合、硬質のメッキ皮膜となる．
第１層の目付け量はいずれの場合も０．５ ｇ／ｍｔ未
満では効果がなく、２ｇ／１超では耐食性が劣化するた
め好ましくない．
この第１層の上にさらに２０ｇ／＋ｍ”以上６０ｇ／ｍ
”以下のＺｎ系合金電気メッキを施す。これは一旦別の
メッキ浴に移して行ってもよく、あるいは同一メッキ浴
を使って浴＆Ｉ１戊を変えるようにして行ってもよい．
そのときのＺｎ系合金電気メッキ目付量が２０ｇ／ｓ”
未満ではもともと合金電気メッキのパウダリング発生が
少ないため、第１層メッキ皮膜を形或する意味がない．
一方、６０ｇ／ｓ’超では第１層メッキ皮膜を前述の如
く形成しても、バウダリング発生が著しく、好ましくな
い．
なお、従来にあって耐食性確保のためには５０ｇ７１程
度の厚日付が望まれていたが、耐パウダリング性を発揮
するために最大２０ｇ／ｗ”、通常は１５ｇ／ｍ”程度
に抑えられていた．
尚、第１層上に形成させるメッキ皮膜が第１層のメッキ
皮膜と同一系の組或の場合、十分な第１層の効果を期待
するためには、第１層合金組戊濃度〈上層合金組威濃度
であることが望ましい．さらに、Ｚｎ系合金電気メッキ
に関しては、化戒処理性、電着塗装性を改善する目的で
さらにその上層にフラッシュメッキを行なったり、耐食
性を向上する目的でクロメート皮膜およびクリアー皮膜
を形成してもよい。(Problems to be Solved by the Invention) However, the disadvantage of such conventional Zn-based alloy electric menki taigari is that the plating film is hard and the plating film itself has little processing deformability. Along with this, there was a problem that the plating film peeled off into powder form during processing, so-called bordering.Normally, if the alloy composition is the same, the amount of powdering increases as the plating area weight increases. When powdering occurs, it adheres to the press mold, etc., and causes indentation defects during pressing. Therefore, as plating becomes thicker, how to reduce the occurrence of powdering becomes an important issue. In order to solve this problem, improvements have been made in terms of utilization technology, such as using highly lubricating press oil during press processing, but the plating film itself has not been improved.The present invention solves this problem. In order to solve these problems, the purpose is to provide a Zn-based alloy electroplated steel sheet that has less bordering even after thick aging by improving the plating film itself. (Means for solving the problems) Achieving the above purpose Therefore, the present inventor has conducted various studies and found that when making a thick layer, the bordering resistance can be greatly improved by applying a thin plating film with high adhesion and workability in advance, and the thin layer of the lower layer can be applied thinly. We found that there is a criticality for this purpose, leading to the present invention. That is, the plating film of the alloy electroplated steel sheet according to the present invention is constructed as follows. First, a first layer is applied to the temporary surface of the steel. , pure Zn or a plating film with a total content of Fe and Ni of 10% or less, with the remainder being Zn and unavoidable impurities, in the form of 0.5 g/, x or more and 28/1 or less.This first layer plating It is more preferable that the film is a single phase of Zn η phase.A Zn-based alloy electroplating film is applied on top of this first layer of plating film at a rate of 20g/m” or more and 60g/m” or more.
The Zn-based alloy electroplated film to be formed on the first layer plating film has a coating weight of less than 20%.
n and alloy plating such as NiSFe, Cos Cr-Cu, etc. According to another embodiment of the present invention, the Zn-based alloy electroplated coating is a dispersion coating containing metal oxides, sulfides, carbides, borides, nephrides, or sulfate compounds therein. It's okay. Note that there may be cases where the first layer plating film and the upper plating film are the same, but in that case, the plating process may be continued to give a thick coating as a whole. Although there is no visible boundary between the first layer and the upper layer,
In the present invention, in that case as well, the lower layer 065 to 2g71
Consider this part as the first layer. However, this upper layer is usually the first
It should be richer in Fe and Ni than the other layers. (Function) Next, the present invention will be explained in more detail, including the reasons for limiting the plating film. First, the steel plate used as the plating base used in the present invention is not particularly limited, and can be selected from those used for automobiles, for example. Next, the first layer plating film may be a pure Zn plating film or a Zn alloy plating film with a total content of Fe+N1 of 10% or less, and a total content of Pe and Ni of 10% or more. When this happens, the plating film itself becomes very hard, so it has no effect at all.Therefore, in the case of alloy plating, Fe and N
The total content of i must be 10% or less. Preferably, it is more effective if it is a single phase of Zn. In the case of T phase, it becomes a hard plating film. In any case, if the basis weight of the first layer is less than 0.5 g/mt, there is no effect, and if it exceeds 2 g/1, the corrosion resistance deteriorates, which is not preferable. On top of this first layer, an additional 20g/+m" or more 60g/m
``Apply the following Zn-based alloy electroplating.This may be done by temporarily transferring to another plating bath, or it may be done by using the same plating bath and changing baths & I1.
At that time, the Zn-based alloy electroplating weight was 20g/s”
If it is less than that, there is little powdering caused by alloy electroplating, so there is no point in shaping the first layer plating film.
On the other hand, if it exceeds 60 g/s', even if the first layer plating film is formed as described above, bordering will occur significantly, which is not preferable. In the past, a thickness of about 50g/m was desired to ensure corrosion resistance, but in order to exhibit powdering resistance, the thickness was kept to a maximum of 20g/w", usually about 15g/m". Ta. In addition, if the plating film to be formed on the first layer has the same composition as the first layer plating film, in order to expect a sufficient effect of the first layer, the concentration of the first layer alloy composition <the upper layer It is desirable that the alloy composition concentration is high. Furthermore, regarding Zn-based alloy electroplating, flash plating may be performed on the top layer to improve chemical treatment properties and electrodeposition coating properties, or a chromate film and clear film may be formed to improve corrosion resistance. good.
このＺｎ系電気メッキ皮膜には金属、例えばｓｂ、Ｚｒ
， Ｔｉ， ＡＱ等の０酸化物、硫化物、炭化物、ホウ
化物、隣化物および硫酸塩化合物が分散されて含有され
てもよい．これ自体は複合メッキとして公知であり、上
述のような粒子をメッキ液に分散させ、メッキ処理操作
を行うのである．
上述のようなメッキ皮膜は慣用の合金電気メッキ法を使
用して形成できるが、代表的な浴組威、メッキ条件は次
の通りである．
第１層メッキ：
上述の組戒の浴で５＾／ｄａ”でメッキすると、９７％
Ｚｎ ３％Ｆｅの第ＩＭメッキ皮膜が得られる．上層
メッキ：
第１層と同一浴で６ＯＡ／ｄｓ”の電流密度で電解する
と、８５％ｚｎ−１５％Ｆｅの上層メッキ皮膜が得られ
る．
（実施例）
本発明を実施例によりさらに詳細に説明する．２胤因よ
前述の標準メッキ条件でそれぞれ第１層として合金＆ｌ
Ｉｙｆｉ：Ｆｅ５％、Ｎｉ １％、Ｚｎ ９４％の合金
電気メッキを、目付け量を種々変化させて施こし、その
上層に合金組戒： Ｆｅ ２０％、Ｚｎ ８０％のＺｎ
系合金電気メッキを５０ｇ／ｍ”形成した鋼板を、ブラ
ンク径９０−、絞り比１．８、絞り抜き （肩Ｒ３Ｒ、
プランクホルダー圧１ ｔｏｎ）で絞り加工した後のパ
ウダリング発生量を調査した結果を第１図に示す．第１
層のメッキ皮膜０．５ｇ／ｓ”以上でパウダリング発生
が著しく抑制されているのが分かる．実嵐班１
実施例１と同様の操作により第１層として、純Ｚｎメッ
キを目付け量を変化させて、上層に１３％のＮｌを含有
するＺｎ−Ｎｉメッキを２０ｇ／ｓ”形成した後、ＪＩ
Ｓ Ｚ ２３７１に規定するように［塩水噴霧６Ｈｒ
−＋５０℃乾燥３Ｈｒ→５０℃×９５％相対湿度雰囲気
１４Ｈｒ→室温冷却１｝１ｒｌを１サイクルとした複合
腐食試験を３０サイクル繰り返した後の最大浸食深さを
測定した．この結果を第２図に示す．
板厚０．８ ａｓの鋼板を使用していたため第１層メ浸
フキ皮膜２．５ｇ／ｍ”のとき優食深さが０．８１一と
なり孔あきが発生した．
なお、本例にあっても目付量０．５〜２．０ ｇｅｍ”
の範囲で耐バウダリング性は良好であった．叉韮貫主
実施例１と同様な操作により第１層に、純Ｚｎメッキを
１ｇ／１施した後、あるいは施さず直接に、１２％Ｎ＋
−８８％ＺｎのＺｎ−Ｎｌ合金電気メッキにＳｒＢａＳ
Ｏ４を０．５％含有させた分散メッキ皮膜の目付け量を
変化させてＺｎ系合金電気メッキ皮膜を形戒させた．こ
の時のバウダリング量を、実施例１と同し方法で評価し
た結果をＺｎ系合金メッキ目付量に相関させて第３図に
示す．下地メッキを行うことで６０ｇ／ｍ”という厚日
付の場合にあっても、パウダリングの発生は効果的に抑
制されるのが分かる。This Zn-based electroplated film contains metals such as sb, Zr.
, Ti, AQ, etc., oxides, sulfides, carbides, borides, nephrides, and sulfate compounds may be contained in a dispersed manner. This itself is known as composite plating, and the particles described above are dispersed in a plating solution and the plating process is performed. The plating film described above can be formed using a conventional alloy electroplating method, and the typical bath composition and plating conditions are as follows. 1st layer plating: 97% when plated at 5^/da” in the above-mentioned Kumikai bath
A Zn 3% Fe IM plating film is obtained. Upper layer plating: When electrolyzed in the same bath as the first layer at a current density of 6OA/ds, an upper layer plating film of 85% ZN-15% Fe can be obtained. (Example) The present invention will be explained in more detail by examples. 2. Under the standard plating conditions mentioned above, each alloy & l is used as the first layer.
Iyfi: Alloy electroplating of 5% Fe, 1% Ni, 94% Zn is applied with various basis weights, and the upper layer is coated with alloy: 20% Fe, 80% Zn.
A steel plate coated with 50g/m'' alloy electroplating was drawn with a blank diameter of 90mm and a drawing ratio of 1.8 (shoulder R3R,
Figure 1 shows the results of investigating the amount of powdering generated after drawing with a plank holder pressure of 1 ton. 1st
It can be seen that the occurrence of powdering is significantly suppressed when the plating film of the layer is 0.5 g/s or more. Jitsu Arashi Group 1 By the same operation as in Example 1, pure Zn plating was applied as the first layer, and the basis weight was varied. After forming Zn-Ni plating containing 13% Nl on the upper layer at 20 g/s, JI
As specified in S Z 2371 [Salt water spray 6Hr]
-+50°C drying for 3 hours → 50°C x 95% relative humidity atmosphere for 14 hours → room temperature cooling for 1} The maximum corrosion depth was measured after 30 cycles of the combined corrosion test. The results are shown in Figure 2. Since a steel plate with a thickness of 0.8 as was used, when the first layer was 2.5 g/m'', the corrosion depth was 0.81 mm, and holes occurred. Even if the basis weight is 0.5~2.0 gem”
The bordering resistance was good within the range of . After plating 1g/1 of pure Zn on the first layer by the same operation as in Example 1, or directly without plating, 12%N+ was applied.
-88% Zn Zn-Nl alloy electroplated with SrBaS
The shape of the Zn-based alloy electroplated film was modified by changing the basis weight of the dispersion plating film containing 0.5% O4. The bordering amount at this time was evaluated using the same method as in Example 1, and the results are shown in FIG. 3 in correlation with the Zn-based alloy plating weight. It can be seen that by performing base plating, the occurrence of powdering can be effectively suppressed even in the case of a thickness of 60 g/m''.
裏施貫土
本例でも実施ｇ４ｌと同様の操作で第１層としてＦｅ＋
Ｎｉの含有率を変化させたＺｎ合金メッキ皮膜を１ｇ／
１形成させたのち、その上層にＺｎ−Ｆｅ２０％合金メ
ッキを４０ｇ／ｓ”形成した鋼板のパウダリング性を、
実施例１と同様の方法で評価し、その結果を第４図に示
す， Ｆｅ＋Ｎｉ合計量が１０％以下でバウダリング発
生が顕著におさえられるのが分かる．５ ６ ７
１
実施例１に準じて第１表に示すようなメッキにつき、実
施例１と同様のバウダリング評価を行った結果を第ｌ表
に示す。In this example, Fe+ was applied as the first layer using the same operation as in the case of implementation g4l.
1 g/Zn alloy plating film with varying Ni content
1, and then a Zn-Fe 20% alloy plating was formed on the top layer at 40 g/s.
Evaluation was performed using the same method as in Example 1, and the results are shown in Figure 4. It can be seen that the occurrence of bordering is significantly suppressed when the total amount of Fe + Ni is 10% or less. 5 6 7
1 According to Example 1, the plating shown in Table 1 was evaluated for bordering in the same manner as in Example 1, and the results are shown in Table 1.
なお、上層の複合メッキは各酸化物粒子（粒径３０−μ
）をメッキ液に浮遊させながら慣用法に準じて行った．
第１表
（発明の効果）
本発明は、以上説明したとおり構威されたことにより、
合金電気メッキの目付量を、加工性を損なうことなく増
加させることが可能となるため、これを用いることによ
り、大幅に自動車の防錆力第１図
第２図
）２ ／層 メ、ソ′＋庚ン用酊目イ寸づ１（あκ共゛
ノを向上することができるという顕著な効果が奏され、
産業上極めて有益である。In addition, the upper layer composite plating consists of each oxide particle (particle size 30-μ
) was suspended in the plating solution according to the conventional method. Table 1 (Effects of the Invention) The present invention, constructed as explained above, provides the following:
It is possible to increase the area weight of alloy electroplating without impairing workability, and by using this, the rust prevention ability of automobiles can be greatly increased. ＋The remarkable effect of being able to improve κ and ゛no has been achieved.
It is extremely useful industrially.
第１図〜第４図は、本発明の実施例の結果を示すグラフ
である。1 to 4 are graphs showing the results of Examples of the present invention.
Claims (3)
ｇ／ｍ＾２以下の目付け量で形成した純Ｚｎメッキ皮膜
またはＦｅとＮｉの合計が１０％以下、残部がＺｎおよ
び不可避的不純物からなるメッキ皮膜と、この上層に２
０ｇ／ｍ＾２以上６０ｇ／ｍ＾２以下の目付量で形成し
たＺｎ系合金メッキ皮膜とを備えたことを特徴とする加
工性に優れた合金電気メッキ鋼板。(1) 0.5g/m^2 or more2 as the first layer on the surface of the steel plate
A pure Zn plating film formed with a basis weight of g/m^2 or less, or a plating film in which the total of Fe and Ni is 10% or less, and the remainder is Zn and unavoidable impurities, and this upper layer is
An alloy electroplated steel sheet with excellent workability, characterized by comprising a Zn-based alloy plating film formed with a basis weight of 0 g/m^2 or more and 60 g/m^2 or less.
である請求項１記載の加工性に優れた合金電気メッキ鋼
板。(2) The alloy electroplated steel sheet with excellent workability according to claim 1, wherein the plating film formed as the first layer is Zn η phase.
膜が、金属の酸化物、硫化物、炭化物、ホウ化物、燐化
物および硫酸塩化合物の少なくとも１種を含んでいる分
散メッキ皮膜である請求項１または２記載の加工性に優
れた合金電気メッキ鋼板。(3) A dispersion plating film in which the Zn-based alloy plating film formed on the first layer contains at least one of metal oxides, sulfides, carbides, borides, phosphides, and sulfate compounds. The alloy electroplated steel sheet with excellent workability according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16116989A JPH0328393A (en) | 1989-06-23 | 1989-06-23 | Alloy electroplated steel sheet having superior workability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16116989A JPH0328393A (en) | 1989-06-23 | 1989-06-23 | Alloy electroplated steel sheet having superior workability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0328393A true JPH0328393A (en) | 1991-02-06 |
Family
ID=15729906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16116989A Pending JPH0328393A (en) | 1989-06-23 | 1989-06-23 | Alloy electroplated steel sheet having superior workability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0328393A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6730039B2 (en) | 2001-10-24 | 2004-05-04 | Colin Corporation | Arteriosclerosis-degree evaluating apparatus |
-
1989
- 1989-06-23 JP JP16116989A patent/JPH0328393A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6730039B2 (en) | 2001-10-24 | 2004-05-04 | Colin Corporation | Arteriosclerosis-degree evaluating apparatus |
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