JPH06235077A - Galvannealed steel sheet excellent in plating adhesion - Google Patents
Galvannealed steel sheet excellent in plating adhesionInfo
- Publication number
- JPH06235077A JPH06235077A JP4336793A JP4336793A JPH06235077A JP H06235077 A JPH06235077 A JP H06235077A JP 4336793 A JP4336793 A JP 4336793A JP 4336793 A JP4336793 A JP 4336793A JP H06235077 A JPH06235077 A JP H06235077A
- Authority
- JP
- Japan
- Prior art keywords
- plating
- layer
- steel sheet
- adhesion
- coating weight
- 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
Landscapes
- Electroplating And Plating Baths Therefor (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、メッキ密着性に優れた
Ｚｎ系合金メッキ鋼板に関するものであって、特にメッ
キ密着性の向上を目的とするものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Zn-based alloy-plated steel sheet having excellent plating adhesion, and particularly to improve the plating adhesion.
【０００２】[0002]
【従来の技術】図３に従来技術例を示す。原板１は、一
般的には熱延又は冷延鋼板であり、板厚は特に規定しな
い。Ｎｉメッキ層４は、通常付着量０．１〜０．３ｇ／
ｍ2 で硫酸ニッケルをベースとする硫酸酸性溶液中にて
電解処理されることによって生じるものであり、Ｚｎ系
合金メッキ層３の密着性を向上させることを目的として
いる。Ｚｎ系合金メッキ層３は、一般的には付着量５ｇ
／ｍ2 以上で原板１の耐蝕性を向上させる目的で使用す
るものである。2. Description of the Related Art FIG. 3 shows a prior art example. The original plate 1 is generally a hot-rolled or cold-rolled steel plate, and the plate thickness is not particularly specified. The Ni plating layer 4 usually has an attached amount of 0.1 to 0.3 g /
It is produced by electrolysis treatment in a sulfuric acid acidic solution based on nickel sulfate at m 2 , and is intended to improve the adhesion of the Zn-based alloy plating layer 3. The Zn-based alloy plating layer 3 generally has an adhesion amount of 5 g.
/ M 2 or more is used for the purpose of improving the corrosion resistance of the original plate 1.
【０００３】[0003]
【発明が解決しようとする課題】上記の従来技術では、
特に自動車外板に要求される低温でのメッキ密着性評点
０．５〜１．５のレベルを満足することができない。SUMMARY OF THE INVENTION In the above prior art,
In particular, the level of plating adhesion rating of 0.5 to 1.5 at a low temperature required for automobile outer panels cannot be satisfied.
【０００４】[0004]
【課題を解決するための手段】本発明は、従来技術の課
題を有利に解決するためになされたものであり、この手
段は、薄鋼板の上部に第一層としてＮｉ−Ｆｅメッキ付
着量０．０５〜０．５ｇ／ｍ2 、Ｆｅ％０．０１〜５％
をメッキし、第二層としてＺｎ系合金メッキ層５ｇ／ｍ
2 以上をメッキすることを特徴とするメッキ密着性に優
れたＺｎ系合金メッキ鋼板である。SUMMARY OF THE INVENTION The present invention has been made to advantageously solve the problems of the prior art. This means is that the amount of Ni—Fe plating deposited as a first layer on the upper portion of a thin steel sheet is 0. 0.05 to 0.5 g / m 2 , Fe% 0.01 to 5%
And Zn-based alloy plating layer 5g / m as the second layer
A Zn-based alloy-plated steel sheet excellent in plating adhesion characterized by plating two or more.
【０００５】以下図面に基づいて本発明を説明する。The present invention will be described below with reference to the drawings.
【０００６】図１は本発明による、メッキ密着性に優れ
た表面処理鋼板を示す図である。原板１は、一般的には
熱延又は冷延鋼板であり、板厚は特に規定しない。Ｎｉ
−Ｆｅメッキ層２は、付着量０．０５〜０．５ｇ／
ｍ2 、Ｆｅ％０．０１〜５％で、硫酸ニッケルをベース
とする硫酸酸性溶液中にて電解処理されることによって
生じるものである。上記のＮｉ−Ｆｅメッキ付着量範囲
以外では、メッキ密着性向上効果が発揮されない。Ｚｎ
系合金メッキ層３は、一般的には付着量５ｇ／ｍ2以上
で原板１の耐蝕性を向上させる目的で使用するものであ
る。FIG. 1 is a view showing a surface-treated steel sheet excellent in plating adhesion according to the present invention. The original plate 1 is generally a hot-rolled or cold-rolled steel plate, and the plate thickness is not particularly specified. Ni
-Fe plating layer 2 has an adhesion amount of 0.05 to 0.5 g /
In m 2, Fe% 0.01~5%, is caused by being electrolytically treated with sulfuric acid acidic solution based on nickel sulfate. The effect of improving the plating adhesion is not exhibited outside the above Ni-Fe plating amount range. Zn
The system alloy plating layer 3 is generally used for the purpose of improving the corrosion resistance of the original plate 1 with an adhesion amount of 5 g / m 2 or more.
【０００７】表１のメッキ液組成及びメッキ条件は以下
の理由にて規定される。The plating solution composition and plating conditions in Table 1 are defined for the following reasons.
【０００８】[0008]
【表１】 [Table 1]
【０００９】硫酸ニッケルは、１００ｇ／リットル以下
では、いわゆるメッキの焼けが発生しメッキ密着性向上
効果が発揮されない。４００ｇ／リットル以上では、板
によるメッキ槽からのメッキ液持ち出しによる損失が大
きくなる。フリー硫酸は、０．１ｇ／リットル以下では
溶液中の金属イオンが水酸化物となり、メッキ密着性向
上効果が発揮されない。３．５ｇ／リットル以上では、
Ｎｉ−Ｆｅメッキ析出効率が低下する。Ｆｅ2+は０．１
〜１０ｇ／リットル以外の範囲ではメッキ密着性向上効
果が発揮されない。これはＦｅ2+の存在によりＮｉ−Ｆ
ｅメッキ層の析出形態が変化し、原板表面のＮｉ−Ｆｅ
メッキ層被覆率が変化するためだと考えられる。Ｆｅ+3
は、不純物として存在するが、Ｎｉ−Ｆｅメッキ析出効
率低下防止の観点より５ｇ／リットル以下が望ましい。
Ｚｎ2+は、Ｎｉ−Ｆｅメッキ析出効率低下防止の観点よ
り２ｇ／リットル以下が望ましい。メッキ液温度につい
ては、メッキ液電導度向上と昇温用蒸気使用量との兼ね
合いより３０〜７０℃が望ましい。メッキ電流密度は、
Ｎｉ−Ｆｅメッキ析出効率低下防止の観点より、１０Ａ
／ｄｍ2 以上が望ましい。When nickel sulfate is less than 100 g / liter, so-called plating burn occurs, and the effect of improving plating adhesion is not exhibited. If it is 400 g / liter or more, the loss caused by taking out the plating solution from the plating tank by the plate becomes large. When free sulfuric acid is 0.1 g / liter or less, metal ions in the solution become hydroxides, and the effect of improving plating adhesion cannot be exhibited. At 3.5 g / liter and above,
Ni-Fe plating deposition efficiency decreases. Fe 2+ is 0.1
If it is outside the range of 10 g / liter, the effect of improving plating adhesion cannot be exhibited. This is due to the presence of Fe 2+ Ni-F
e The deposition morphology of the plating layer changes, and Ni-Fe on the surface of the original plate changes.
It is considered that this is because the plating layer coverage changes. Fe +3
Exists as an impurity, but is preferably 5 g / liter or less from the viewpoint of preventing the decrease in Ni-Fe plating deposition efficiency.
Zn 2+ is preferably 2 g / liter or less from the viewpoint of preventing a decrease in Ni-Fe plating deposition efficiency. The temperature of the plating solution is preferably 30 to 70 ° C. in consideration of the improvement of the conductivity of the plating solution and the amount of steam used for raising the temperature. Plating current density is
From the viewpoint of preventing the decrease in Ni-Fe plating deposition efficiency, 10 A
/ Dm 2 or more is desirable.
【００１０】[0010]
【実施例】以下、本発明を実施例により具体的に説明す
る。EXAMPLES The present invention will be specifically described below with reference to examples.
【００１１】冷延鋼板表面に表２に示すメッキ液組成及
びメッキ条件にて付着量を変えてＮｉ−Ｆｅメッキを行
い、更に上層にＺｎ系合金メッキを施し、低温にて上層
のＺｎ系合金メッキ層の密着性を調査した。その調査結
果を図２に示す。Ni-Fe plating was performed on the surface of the cold-rolled steel sheet by changing the amount of coating according to the plating solution composition and plating conditions shown in Table 2, and Zn-based alloy plating was further applied on the upper layer, and the Zn-based alloy of the upper layer was applied at low temperature. The adhesion of the gold plating layer was investigated. The survey results are shown in FIG.
【００１２】[0012]
【表２】 [Table 2]
【００１３】図２中、メッキ密着性評点は０〜５までで
評点が少ないほど密着性良好である。メッキ密着性評価
試験は、表２のメッキ液組成及びメッキ条件にて、原板
表面にＮｉ−Ｆｅメッキ０．２ｇ／ｍ2 を施した鋼板上
に、更に２０ｇ／ｍ2 のＺｎ−Ｎｉ（Ｎｉ％＝１０％）
を実施し、その後化成処理、電着塗装、中塗り塗装及び
上塗り塗装を行った鋼板をサンプルとして用いた。上記
サンプルを−２０℃に冷却し、スピードを変化させてダ
イヤモンドをサンプルに衝突させる。その際、発生する
塗膜及びメッキ層の剥離面積により評点を決定した。In FIG. 2, the plating adhesion rating is from 0 to 5, and the smaller the rating, the better the adhesion. The plating adhesion evaluation test was carried out under the plating liquid composition and plating conditions shown in Table 2 on a steel plate having Ni-Fe plating of 0.2 g / m 2 on the surface of the original plate, and further 20 g / m 2 of Zn-Ni (Ni % = 10%)
Was carried out, and then chemical conversion treatment, electrodeposition coating, intermediate coating and top coating were used as samples. The sample is cooled to -20 ° C and the speed is varied to cause diamond to impinge on the sample. At that time, the score was determined by the peeled area of the coating film and the plating layer generated.
【００１４】比較例として、Ｎｉ−Ｆｅメッキ無しの条
件では（□印）、メッキ密着性評点は３〜５までで自動
車外板に要求される低温でのメッキ密着性評点０．５〜
１．５のレベルを満足することができない。As a comparative example, under the condition without Ni-Fe plating (marked with □), the plating adhesion rating is 3 to 5 and the plating adhesion rating at low temperature required for automobile skin is 0.5 to 0.5.
I cannot meet the 1.5 level.
【００１５】さらに比較例としてＮｉメッキ実施の条件
では（◇印）、Ｎｉ付着量０．１５〜０．２５ｇ／ｍ2
の条件でメッキ密着性評点１．７〜１．９で自動車外板
に要求される低温でのメッキ密着性評点０．５〜１．５
のレベルを満足することができない。Further, as a comparative example, under the conditions of Ni plating (marked with ⋄), the Ni deposition amount is 0.15 to 0.25 g / m 2
Under the conditions, the plating adhesion rating is 1.7 to 1.9, and the plating adhesion rating at low temperature required for automobile skin is 0.5 to 1.5.
Can not meet the level of.
【００１６】本発明でのＮｉ−Ｆｅメッキ実施の条件で
は（●印）、Ｎｉ−Ｆｅ付着量０．０５〜０．５ｇ／ｍ
2 の条件でメッキ密着性評点１．０〜１．５で自動車外
板に要求される低温でのメッキ密着性評点０．５〜１．
５のレベルを満足することができる。Under the conditions for carrying out Ni—Fe plating according to the present invention (marked with ●), the Ni—Fe adhesion amount is 0.05 to 0.5 g / m 2.
The plating adhesion rating of 1.0 to 1.5 under the condition of 2 and the plating adhesion rating of 0.5 to 1.
You can meet the 5 levels.
【００１７】[0017]
【発明の効果】本発明により、図２に示すように自動車
外板に要求される低温でのメッキ密着性評点０．５〜
１．５のレベルを満足することができる。According to the present invention, as shown in FIG. 2, the plating adhesion at a low temperature required for an automobile outer plate is rated from 0.5 to.
The level of 1.5 can be satisfied.
【図１】本発明のメッキ密着性に優れたＺｎ系合金メッ
キ鋼板の縦断面説明図である。FIG. 1 is a vertical cross-sectional explanatory view of a Zn-based alloy-plated steel sheet having excellent plating adhesion according to the present invention.
【図２】Ｎｉ−Ｆｅ又はＮｉメッキ付着量とメッキ密着
性との関係を示すグラフである。FIG. 2 is a graph showing the relationship between the Ni—Fe or Ni plating adhesion amount and plating adhesion.
【図３】従来のＺｎ系合金メッキ鋼板の縦断面説明図で
ある。FIG. 3 is a vertical cross-sectional explanatory view of a conventional Zn-based alloy-plated steel sheet.
１ 原板 ２ Ｎｉ−Ｆｅメッキ層 ３ Ｚｎ系合金メッキ層 ４ Ｎｉメッキ層 1 original plate 2 Ni-Fe plated layer 3 Zn-based alloy plated layer 4 Ni plated layer
Claims (1)
メッキ付着量０．０５〜０．５ｇ／ｍ2 、Ｆｅ％０．０
１〜５％をメッキし、第二層としてＺｎ系合金メッキ層
５ｇ／ｍ2 以上をメッキすることを特徴とするメッキ密
着性に優れたＺｎ系合金メッキ鋼板。1. A Ni—Fe layer as a first layer on a thin steel sheet.
Plating adhesion amount 0.05 to 0.5 g / m 2 , Fe% 0.0
A Zn-based alloy-plated steel sheet having excellent plating adhesion, which comprises plating 1 to 5% and a Zn-based alloy plating layer of 5 g / m 2 or more as a second layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4336793A JP2946154B2 (en) | 1993-02-09 | 1993-02-09 | Zn-based alloy plated steel sheet with excellent plating adhesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4336793A JP2946154B2 (en) | 1993-02-09 | 1993-02-09 | Zn-based alloy plated steel sheet with excellent plating adhesion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06235077A true JPH06235077A (en) | 1994-08-23 |
| JP2946154B2 JP2946154B2 (en) | 1999-09-06 |
Family
ID=12661881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4336793A Expired - Lifetime JP2946154B2 (en) | 1993-02-09 | 1993-02-09 | Zn-based alloy plated steel sheet with excellent plating adhesion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2946154B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140031337A (en) | 2011-07-29 | 2014-03-12 | 신닛테츠스미킨 카부시키카이샤 | Alloyed hot-dip zinc coat layer, steel sheet having same, and method for producing same |
-
1993
- 1993-02-09 JP JP4336793A patent/JP2946154B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140031337A (en) | 2011-07-29 | 2014-03-12 | 신닛테츠스미킨 카부시키카이샤 | Alloyed hot-dip zinc coat layer, steel sheet having same, and method for producing same |
| US9551057B2 (en) | 2011-07-29 | 2017-01-24 | Nippon Steel & Sumitomo Metal Corporation | Galvannealed layer and steel sheet comprising the same, and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2946154B2 (en) | 1999-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990525 |