JPH0762563A - Galvanized steel sheet excellent in impact resistance and adhesion - Google Patents
Galvanized steel sheet excellent in impact resistance and adhesionInfo
- Publication number
- JPH0762563A JPH0762563A JP23404093A JP23404093A JPH0762563A JP H0762563 A JPH0762563 A JP H0762563A JP 23404093 A JP23404093 A JP 23404093A JP 23404093 A JP23404093 A JP 23404093A JP H0762563 A JPH0762563 A JP H0762563A
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- Prior art keywords
- steel sheet
- impact resistance
- plating
- ratio
- adhesion
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- Electroplating Methods And Accessories (AREA)
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- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐衝撃密着性に優れたＺ
ｎ系めっき鋼板に関し、さらに詳しくは、塗装性の優れ
た耐衝撃密着性に優れたＺｎ系めっき鋼板に関するもの
である。FIELD OF THE INVENTION The present invention relates to Z having excellent impact resistance and adhesion.
More particularly, the present invention relates to a Zn-based plated steel sheet having excellent paintability and impact resistance and adhesion.
【０００２】[0002]
【従来技術】従来より、Ｚｎ系めっき鋼板は自動車、家
庭電化製品等に広く使用されてきている。特に、Ｎｉ5
Ｚｎ21、ＦｅＺｎ7、Ｆｅ3Ｚｎ10のようなＺｎ系金属間
化合物からなるＺｎ−Ｎｉ、Ｚｎ−Ｆｅ合金めっき鋼板
は、優れた耐蝕性および塗装性を有しているので、自動
車、家庭電化製品等種々の用途に広く使用されている。2. Description of the Related Art Conventionally, Zn-based plated steel sheets have been widely used in automobiles, home electric appliances and the like. Especially Ni 5
Since Zn-Ni and Zn-Fe alloy plated steel sheets made of Zn-based intermetallic compounds such as Zn 21 , FeZn 7 , and Fe 3 Zn 10 have excellent corrosion resistance and paintability, they can be used in automobiles and home electrification. Widely used for various purposes such as products.
【０００３】しかし、金属間化合物は一般的に硬度が高
く、脆いという欠点が存在する。従って、Ｚｎ系金属間
化合物からなる合金めっき鋼板を自動車外板として使用
する場合、走行時に飛石等によるチッピング衝撃を受け
ることによって、塗装の剥離と同時にめっき皮膜の剥離
をも発生し易く、このようなチッピング現象によってめ
っきが剥離したところは、赤錆が生じ易く、自動車外板
として使用することには致命的な問題となる。However, intermetallic compounds generally have the drawbacks of high hardness and brittleness. Therefore, when an alloy-plated steel sheet made of a Zn-based intermetallic compound is used as an outer panel of an automobile, the coating film is likely to be peeled off at the same time as peeling of the coating due to chipping impact caused by flying stones during running. Where the plating is peeled off due to the chipping phenomenon, red rust is likely to occur, which is a fatal problem for use as an automobile outer panel.
【０００４】また、Ｚｎ系金属間化合物からなるめっき
が施されている鋼板は、プレコート鋼板の原板として使
用されることが多いが、しかし、金属間化合物きらなる
めっきが施されている鋼板を原板としてプレコート鋼板
を切断、打ち抜き等の加工を行った場合には、切断部の
端面において塗膜の剥離を生じることがあり、このよう
な、塗膜の剥離はめっき層内から生じており、重大な問
題である。Further, a steel sheet plated with a Zn-based intermetallic compound is often used as an original plate of a precoated steel sheet, however, a steel plate plated with an intermetallic compound is used as an original plate. As a result, when the precoated steel sheet is cut or processed by punching or the like, peeling of the coating film may occur at the end face of the cut portion, and such peeling of the coating film occurs from within the plating layer, Problem.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記に説明し
た従来における自動車の車体およびプレコート鋼板の原
板のような衝撃を受けることが多い部位に、Ｚｎ系金属
間化合物からなるめっき鋼板を使用した場合の種々の問
題点を解決するために、本発明者が鋭意研究を行い、検
討を重ねた結果、飛石等によるチッピングおよび切断、
打ち抜き等の加工を行った場合に、塗膜が剥離すること
のない塗装性の優れた耐衝撃密着性に優れたＺｎ系めっ
き鋼板を開発したのである。DISCLOSURE OF THE INVENTION The present invention uses a plated steel sheet made of a Zn-based intermetallic compound in a portion which is often subjected to an impact, such as the above-described conventional car body of the automobile and an original plate of a precoated steel sheet. In order to solve various problems in the case, the present inventors have conducted diligent research, and as a result of repeated studies, chipping and cutting by stepping stones,
We have developed a Zn-based plated steel sheet that does not peel off the coating film when it is subjected to punching or other processing, has excellent coatability, and has excellent impact resistance and adhesion.
【０００６】[0006]
【課題を解決するための手段】本発明に係る耐衝撃密着
性に優れたＺｎ系めっき鋼板は、Ｚｎ系金属間化合物か
らなるめっきが施されている鋼板上に、Ｆｅ系電気めっ
きが施され、その上に燐酸塩処理により施された燐酸塩
皮膜のフォスフォフィライト比率（Ｐ率）が０.９以上
であることを特徴とする耐衝撃密着性に優れたＺｎ系め
っき鋼板。 Ｐ比率フォスフォフィライト（１００）面のＸ線回析強度 フォスフォフィライト（１００）面のＸ線回析強度 ＋ホパイト（０２０）面のＸ線回析強度 をその構成要件とするものである。MEANS FOR SOLVING THE PROBLEMS A Zn-plated steel sheet excellent in impact resistance and adhesion according to the present invention is obtained by performing Fe-based electroplating on a steel sheet plated with a Zn-based intermetallic compound. A Zn-based plated steel sheet having excellent impact resistance, characterized in that the phosphyllite ratio (P ratio) of the phosphate coating applied by the phosphate treatment is 0.9 or more. P ratio X-ray diffraction intensity of phosphophyllite (100) plane X-ray diffraction intensity of phosphophyllite (100) plane + X-ray diffraction intensity of hopite (020) plane is there.
【０００７】本発明に係る耐衝撃密着性に優れたＺｎ系
めっき鋼板について、以下詳細に説明する。The Zn-plated steel sheet having excellent impact resistance and adhesion according to the present invention will be described in detail below.
【０００８】本発明に係る耐衝撃密着性に優れたＺｎ系
めっき鋼板のＺｎ系金属間化合物は、ＺｎとＦｅ、Ｎ
ｉ、Ｃｏ、Ｃｒ、Ｍｏ、Ａｌ、Ｓｉの少なくとも１種以
上からなるものである。The Zn-based intermetallic compound of the Zn-plated steel sheet excellent in impact resistance according to the present invention includes Zn, Fe and N.
It is composed of at least one of i, Co, Cr, Mo, Al and Si.
【０００９】例えば、電気めっきによるＺｎ−Ｎｉ、Ｚ
ｎ−Ｆｅ、Ｚｎ−Ｃｒ、Ｚｎ−Ｃｏ、Ｚｎ−Ｎｉ−Ｃ
ｒ、Ｚｎ−Ｎｉ−Ｃｏ、Ｚｎ−Ｎｉ−Ｍｏ、Ｚｎ−Ｎｉ
−Ｃｒ−Ｃｏ、或いは、合金化溶融亜鉛めっき等が挙げ
られる。For example, Zn-Ni, Z by electroplating
n-Fe, Zn-Cr, Zn-Co, Zn-Ni-C
r, Zn-Ni-Co, Zn-Ni-Mo, Zn-Ni
-Cr-Co, alloying hot-dip galvanizing, etc. are mentioned.
【００１０】また、めっきと地鉄界面にのみＡｌ−Ｆ
ｅ、Ａｌ−Ｆｅ−Ｓｉの金属間化合物を有する溶融Ｚｎ
−Ａｌめっきも当然含まれ、さらに、めっき層の過半が
金属間化合物であれば、一部金属層または合金元素を固
溶する金属層が含まれていても良い。Al-F is present only at the interface between the plating and the base metal.
e, Molten Zn with Al-Fe-Si intermetallic compound
-Al plating is naturally included, and if a majority of the plated layer is an intermetallic compound, a metal layer or a metal layer in which an alloy element is solid-dissolved may be included.
【００１１】一般的に、Ｚｎ系金属間化合物の燐酸塩皮
膜は、ホパイトのみであってＰ比率は０である。しか
し、めっき層中のＦｅ含有率が６０％以上になると、燐
酸塩皮膜はホパイトからフォスフォフィライトに徐々に
変化しとＰ比率は高くなる。In general, the phosphate coating of a Zn-based intermetallic compound is composed only of hopite and has a P ratio of 0. However, when the Fe content in the plating layer is 60% or more, the P ratio increases as the phosphate coating gradually changes from hopite to phosphyllite.
【００１２】ただし、めっき層中のＦｅ含有率が６０％
以上になると、耐蝕性が劣化するので、Ｐ比率を上昇さ
せるためには、Ｚｎ系金属間化合物上にＦｅ系のフラッ
シュめっきを、電気めっきにより行うのである。However, the Fe content in the plating layer is 60%.
In the above case, the corrosion resistance is deteriorated, so in order to increase the P ratio, Fe-based flash plating is performed on the Zn-based intermetallic compound by electroplating.
【００１３】図１に、Ｚｎ系の金属間化合物からなるめ
っき鋼板の耐衝撃密着性におよぼす燐酸塩皮膜のＰ比率
の影響を示してある。この図１において、めっき層の下
層は、Ｚｎ−１２％Ｎｉ（２０ｇ／ｍ2）または合金化
溶融亜鉛めっき（Ｆｅ１１％、３０ｇ／ｍ2）、上層は
Ｆｅ−２０％Ｚｎ（０〜４ｇ／ｍ2）である。なお、Ｚ
ｎ系の金属間化合物からなるめっき鋼板の燐酸塩皮膜の
Ｐ比率は、Ｆｅ−２０％Ｚｎ電気めっきを施すことによ
り変化させた。FIG. 1 shows the effect of the P ratio of the phosphate coating on the impact resistance of a plated steel sheet made of a Zn-based intermetallic compound. In this FIG. 1, the lower layer of the plating layer is Zn-12% Ni (20 g / m 2 ) or galvannealing (Fe 11%, 30 g / m 2 ), and the upper layer is Fe-20% Zn (0-4 g / m 2 ). m 2 ). In addition, Z
The P ratio of the phosphate coating of the plated steel sheet made of an n-based intermetallic compound was changed by performing Fe-20% Zn electroplating.
【００１４】そして、燐酸塩皮膜のＰ比率が０.９以上
になると、めっき剥離が著しく減少するようになり、即
ち、耐衝撃密着性は良好となる。When the P ratio of the phosphate coating is 0.9 or more, the plating peeling is significantly reduced, that is, the impact resistance is good.
【００１５】この原因については、明らかではないが、
以下説明するように推測することができる。即ち、燐酸
塩皮膜のＰ比率が０.９以上になると、地鉄／Ｚｎ系金
属間化合物の界面剥離（以下、めっき剥離という。）は
大幅に減少している。The cause of this is not clear,
It can be inferred as described below. That is, when the P ratio of the phosphate film is 0.9 or more, the interfacial peeling of the base iron / Zn-based intermetallic compound (hereinafter referred to as plating peeling) is significantly reduced.
【００１６】また、燐酸塩皮膜／電着塗膜の界面剥離
は、やや増加している。このことから、燐酸塩皮膜のＰ
比率が高くなると、燐酸塩皮膜／電着塗膜の耐衝撃密着
性が若干弱くなり、ここを起点として剥離が生じること
により、衝撃エネルギーが消費され、めっき剥離が少な
くなると考えられる。Further, the interfacial peeling of the phosphate coating / electrodeposition coating is slightly increased. From this, the P of the phosphate coating
When the ratio is high, it is considered that the impact resistance of the phosphate coating / electrodeposition coating is slightly weakened, and peeling occurs from this point, thereby consuming impact energy and reducing plating peeling.
【００１７】次に、Ｚｎ系金属間化合物の燐酸塩皮膜の
Ｐ比率は、Ｆｅ系電気めっきを施すことにより、高くす
ることができる。図２にＺｎ系金属間化合物からなるめ
っき（−○−はＺｎ−１２％Ｎｉ、−●−は合金化溶融
亜鉛めっき）の燐酸塩皮膜のＰ比率とＦｅ系電気めっき
（Ｆｅ−１０％Ｚｎ）付着量の関係を示してある。Next, the P ratio of the Zn-based intermetallic compound phosphate coating can be increased by performing Fe-based electroplating. FIG. 2 shows the P ratio of the phosphate coating of Zn-based intermetallic compound plating (-○-is Zn-12% Ni,-●-is alloyed hot dip galvanizing) and Fe-based electroplating (Fe-10% Zn). ) The relationship between the adhered amounts is shown.
【００１８】図２に示すように、Ｚｎ系金属間化合物の
燐酸塩皮膜のＰ比率は、Ｆｅ系電気めっきの付着量が増
加すると共に高くなる。そして、Ｆｅ系電気めっき付着
量はＰ比率を０.９以上となるように施すのであるが、
付着量が多すぎると赤錆が発生し易くなるので、Ｐ比率
は０.９以上とするのがよいが、その範囲はできるだけ
少ない方が望ましい。As shown in FIG. 2, the P ratio of the phosphate coating of the Zn-based intermetallic compound increases as the amount of Fe-based electroplating deposited increases. The Fe-based electroplating amount is applied so that the P ratio is 0.9 or more.
If the amount of adhesion is too large, red rust is likely to occur, so the P ratio is preferably 0.9 or more, but the range is preferably as small as possible.
【００１９】Ｚｎ系金属間化合物の燐酸塩皮膜のＰ比率
を高くするためのＦｅ系電気めっきとしては、Ｆｅのみ
でも充分であるが、ＦｅにＺｎ、Ｃｏ、Ｎｉ、Ｃｒ、Ｃ
ｕ、Ｐ、Ｓｎ、Ｍｎ、Ｍｇ、Ｍｏ、Ｗ、Ｓｉ、Ｔｉの１
種以上を含有させるとめっき層が僅かに硬化して、プレ
ス成形性の点で好都合である。As Fe-based electroplating for increasing the P ratio of the phosphate coating of Zn-based intermetallic compound, Fe alone is sufficient, but Zn, Co, Ni, Cr, C may be added to Fe.
1 of u, P, Sn, Mn, Mg, Mo, W, Si, Ti
If more than one kind is contained, the plating layer is slightly hardened, which is convenient in terms of press formability.
【００２０】しかし、Ｆｅ含有率が低くなり過ぎると、
付着量を多くしてもＰ比率は高くならないので、Ｐ比率
が０.９以上となるような程度に含有元素を含有させな
ければならない。However, if the Fe content becomes too low,
Since the P ratio does not increase even if the adhesion amount is increased, the contained element must be contained to such an extent that the P ratio becomes 0.9 or more.
【００２１】このような耐衝撃密着性に優れたＺｎ系め
っき鋼板に塗装を施す方法について説明する。A method of coating such a Zn-based plated steel sheet having excellent impact resistance and adhesion will be described.
【００２２】Ｚｎ系金属間化合物からなるめっき層は、
電気めっき法、溶融めっき法、蒸着めっき法等により製
造でき、下地鋼板としては、普通鋼、Ａｌキルド鋼、高
張力鋼板等種々のものが使用でき、また、Ｚｎ系金属間
化合物からなるめっきの前処理として、Ｎｉ、Ｆｅ等の
プレめっきを行ってもよい。The plating layer made of a Zn-based intermetallic compound is
It can be manufactured by an electroplating method, a hot dip plating method, a vapor deposition plating method, etc., and various kinds of base steel such as ordinary steel, Al-killed steel, and high-strength steel can be used. As a pretreatment, pre-plating with Ni, Fe or the like may be performed.
【００２３】また、Ｆｅ系電気めっきは慣用手段で行う
ことができ、特に制限するものではない。例えば、ｐＨ
１〜３の硫酸塩浴、塩化物浴等を使用して、電流密度が
１〜２００Ａ／ｄｍ2、ラインスピードが１〜２００ｍ
／ｍｉｎのめっき条件下で行うことができる。Further, the Fe-based electroplating can be carried out by a conventional means and is not particularly limited. For example, pH
1-3 sulfate bath, chloride bath, etc., current density 1-200 A / dm 2 , line speed 1-200 m
/ Min plating conditions.
【００２４】なお、めっき層中のＦｅ含有率の調整は、
めっき浴中のＦｅ、Ｚｎ、Ｃｏ、Ｎｉ、Ｃｒ、Ｃｕ、
Ｐ、Ｓｎ、Ｍｎ、Ｍｇ、Ｍｏ、Ｗ、Ｓｉ、Ｔｉイオン等
の濃度を制御して電気めっきを行うことにより、また、
めっき付着量の調整は、通電量を制御することによって
行うことができる。The adjustment of the Fe content in the plating layer is as follows.
Fe, Zn, Co, Ni, Cr, Cu in the plating bath,
By controlling the concentration of P, Sn, Mn, Mg, Mo, W, Si, Ti ions and the like for electroplating,
The amount of deposits on the plating can be adjusted by controlling the amount of electricity.
【００２５】燐酸塩処理方法は、通常の自動車仕様、家
庭電化製品仕様の通りとすればよい。その工程は、脱脂
→水洗→表面調整→燐酸亜鉛水溶液による化成処理（燐
酸塩皮膜作製）→水洗（水道水）→水洗（純水）→水切
り・乾燥である。この場合、燐酸亜鉛水溶液による化成
処理（燐酸塩皮膜作製）は、Ｐ比率が０.９以上になる
のであれば、スプレー処理、ティップ処理の何れの処理
でもよい。The phosphating method may be according to normal automobile specifications and home electric appliance specifications. The steps are degreasing → washing with water → surface adjustment → chemical conversion treatment with an aqueous solution of zinc phosphate (phosphate film formation) → washing with water (tap water) → washing with water (pure water) → draining and drying. In this case, the chemical conversion treatment (preparation of phosphate film) with the aqueous solution of zinc phosphate may be either spray treatment or tip treatment as long as the P ratio is 0.9 or more.
【００２６】燐酸塩皮膜のフォスフォフィライト比率
（Ｐ比率）は、Ｘ線回析を使用して、ホパイト｛Ｚｎ3
（ＰＯ4）2４Ｈ2Ｏ｝の（０２０）面とフォスフォフィ
ライト｛Ｚｎ2Ｆｅ（ＰＯ4）2４Ｈ2Ｏ｝の（１００）面
の回析線強度を求めてから、次式により計算した。 Ｐ比率フォスフォフィライト（１００）面のＸ線回析強度 フォスフォフィライト（１００）面のＸ線回析強度 ＋ホパイト（０２０）面のＸ線回析強度The phosphophyllite ratio (P ratio) of the phosphate coating was determined by using X-ray diffraction to measure the phosphite {Zn 3
After (PO 4) determine the diffraction lines intensity of the (100) plane of the 2 4H 2 O} of (020) plane and phosphophyllite {Zn 2 Fe (PO 4) 2 4H 2 O}, the following equation I calculated. P ratio X-ray diffraction intensity of phosphophyllite (100) plane X-ray diffraction intensity of phosphophyllite (100) plane + X-ray diffraction intensity of hopite (020) plane
【００２７】このようにして調整製造された鋼板表面に
塗装を行うのであるが、この塗装について何らの制限は
ない。即ち、例えば、エポキシ樹脂をプライマー層とし
たポリエステル系、シリコンポリエステル系または塩化
ビニル系塗装等による行うことができる。The surface of the steel sheet thus adjusted and manufactured is coated, but there is no limitation on this coating. That is, for example, polyester-based coating using epoxy resin as a primer layer, silicone polyester-based coating, or vinyl chloride-based coating can be performed.
【００２８】そして、Ｆｅ系電気めっき、燐酸亜鉛処理
の工程は、鋼帯にめっきを連続的に施した後、同一製造
ラインの後処理として実施してもよい。また、この鋼帯
を連続塗装設備により塗装する場合の前処理として実施
してもよく、さらに、めっき鋼板を部品に加工した後、
塗装する前の前処理として実施してもよい。要するに、
めっき鋼板に、Ｆｅ系電気めっき、燐酸塩処理、塗装と
いう順序で処理が行われればよいのであり、処理設備に
は何ら限定はない。The steps of Fe-based electroplating and zinc phosphate treatment may be carried out as a post-treatment on the same production line after continuously plating the steel strip. In addition, this steel strip may be carried out as a pretreatment when coating with a continuous coating facility, and after processing the plated steel sheet into parts,
You may implement as a pre-treatment before painting. in short,
It suffices that the plated steel sheet is treated in the order of Fe-based electroplating, phosphate treatment, and coating, and the treatment equipment is not limited at all.
【００２９】[0029]
【実 施 例】本発明に係る耐衝撃密着性に優れたＺｎ
系めっき鋼板の実施例を説明する。[Examples] Zn excellent in impact resistance according to the present invention
An example of the system-plated steel sheet will be described.
【００３０】[0030]
【実 施 例】本発明に係る耐衝撃密着性に優れたＺｎ系
めっき鋼板の、Ｚｎ系金属間化合物の成分、付着量、Ｆ
ｅ系電気めっきの付着量、成分および燐酸塩皮膜のＰ比
率、耐衝撃密着性を表１に示す。[Examples] Components of Zn-based intermetallic compound, adhesion amount, F of Zn-based plated steel sheet having excellent impact adhesion according to the present invention
Table 1 shows the amount of e-type electroplating deposited, the components, the P ratio of the phosphate coating, and the impact resistance.
【００３１】耐衝撃密着性は次のように評価する。即
ち、ＡＳＴＭ Ｄ−３１７０−７４に規定されている耐
衝撃密着性試験に準じて、７０×１５０ｍｍの鋼板試験
片に自動車用３コート仕上げ（トータル膜厚；９０μ
ｍ）を施して、常温においてグラベロチッピングテスト
を行った。The impact resistance is evaluated as follows. That is, according to the impact resistance adhesion test specified in ASTM D-3170-74, a steel plate test piece of 70 × 150 mm is finished with 3 coats for automobile (total film thickness: 90 μm).
m) was performed and a gravure chipping test was performed at room temperature.
【００３２】評価基準 ４・・・良好でめっき剥離なし ３・・・めっき剥離面積率が０.２％未満 ２・・・面積率剥離面積率が０.２％以上１％未満 １・・・めっき剥離めっきが１％以上Evaluation Criteria 4 ... Good and no plating peeling 3 ... Plating peeling area ratio less than 0.2% 2 ... Area rate peeling area ratio 0.2% or more and less than 1% 1 ... Plating peeling plating is 1% or more
【００３３】耐チッピング性の評価基準は、上記の耐衝
撃密着性試験に準じて、剥離面積に応じて４段階の評価
を行った。The chipping resistance was evaluated in accordance with the above-mentioned impact resistance adhesion test, and was evaluated in four steps according to the peeled area.
【００３４】Ｚｎ系金属間化合物からなるめっきを有す
る鋼板を原板としたプレコート鋼板の耐打ち抜き性は、
供試材に燐酸塩処理を施した後、ポリエステル系塗料を
塗布し、円形打ち抜きを行い、打ち抜き孔周辺のテーピ
ングによる塗膜剥離面積によって評価した。ただし、ポ
ンチ径１４ｍｍ、クリアランス０.１５ｍｍ、塗膜厚さ
２０μｍとした。The punching resistance of a precoated steel sheet using a steel sheet having a Zn-based intermetallic compound as a plating is
After subjecting the test material to the phosphate treatment, a polyester-based coating was applied, circular punching was performed, and the film peeling area by taping around the punching hole was evaluated. However, the punch diameter was 14 mm, the clearance was 0.15 mm, and the coating film thickness was 20 μm.
【００３５】評価基準 ４・・・塗膜の剥離面積が０.５ｍｍ2未満 ３・・・塗膜の剥離面積が０.５ｍｍ2以上１.２ｍｍ2未
満 ２・・・塗膜の剥離面積が１.２ｍｍ2以上２.０ｍｍ2未
満 １・・・塗膜の剥離面積が２.０ｍｍ2以上Evaluation Criteria 4 ... Peeling area of coating film is less than 0.5 mm 2 3 ... Peeling area of coating film is 0.5 mm 2 or more and less than 1.2 mm 2 2 ... Peeling area of coating film is 1.2 mm 2 or more and less than 2.0 mm 2 1 ... The peeled area of the coating film is 2.0 mm 2 or more
【００３６】表１において、Ｎｏ.１〜Ｎｏ.２９は本発
明に係る耐衝撃密着性に優れたＺｎ系めっき鋼板であ
る。なお、Ｎｏ.３０〜Ｎｏ.３５は比較例である。即
ち、この表１から、本発明に係る耐衝撃密着性に優れた
Ｚｎ系めっき鋼板は、比較例に比べて耐衝撃密着性に優
れており、燐酸塩皮膜のＰ比率が０.９以上となるよう
にＦｅ系電気めっきを施すと、耐衝撃密着性が改善され
ていることがわかる。In Table 1, Nos. 1 to 29 are Zn-based plated steel sheets according to the present invention having excellent impact adhesion. Note that No. 30 to No. 35 are comparative examples. That is, it can be seen from Table 1 that the Zn-based plated steel sheet according to the present invention, which is excellent in impact resistance adhesion, is superior in impact resistance adhesion as compared with the comparative example, and the P ratio of the phosphate coating is 0.9 or more. It can be seen that impact-resistant adhesion is improved when Fe-based electroplating is performed so that
【００３７】[0037]
【表１】 [Table 1]
【００３８】[0038]
【発明の効果】以上説明したように、本発明に係る耐衝
撃密着性に優れたＺｎ系めっき鋼板は、上記の構成を有
しているから、耐衝撃密着性に極めて優れており、自動
車の車体および家庭電化製品用として効果的に使用する
ことができる。Industrial Applicability As described above, the Zn-plated steel sheet according to the present invention, which is excellent in impact resistance and adhesion, has the above-mentioned constitution, and therefore is extremely excellent in impact resistance and is suitable for automobiles. It can be effectively used for car bodies and home appliances.
【図１】燐酸塩皮膜のＰ比率と耐衝撃密着性との関係を
示す図である。FIG. 1 is a graph showing the relationship between the P ratio of a phosphate coating and impact resistance.
【図２】Ｆｅ−２０％Ｚｎめっき付着量と燐酸塩皮膜の
Ｐ比率との関係を示す図である。FIG. 2 is a diagram showing a relationship between an Fe-20% Zn plating deposition amount and a P ratio of a phosphate coating.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２５Ｄ 3/56 Ｂ Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location C25D 3/56 BD
Claims (1)
れている鋼板上に、Ｆｅ系電気めっきが施され、その上
に燐酸塩処理により施された燐酸塩皮膜のフォスフォフ
ィライト比率（Ｐ率）が０.９以上であることを特徴と
する耐衝撃密着性に優れたＺｎ系めっき鋼板。 Ｐ比率フォスフォフィライト（１００）面のＸ線回析強度 フォスフォフィライト（１００）面のＸ線回析強度 ＋ホパイト（０２０）面のＸ線回析強度1. A phosphophyllite ratio of a phosphate film (Fe) electroplated on a steel sheet plated with a Zn-based intermetallic compound, and a phosphate coating applied on the plated steel ( A Zn-based plated steel sheet excellent in impact resistance and adhesion, characterized in that the P ratio) is 0.9 or more. P ratio X-ray diffraction intensity of phosphophyllite (100) plane X-ray diffraction intensity of phosphophyllite (100) plane + X-ray diffraction intensity of hopite (020) plane
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23404093A JP2961037B2 (en) | 1993-08-26 | 1993-08-26 | Zn-coated steel sheet with excellent impact adhesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23404093A JP2961037B2 (en) | 1993-08-26 | 1993-08-26 | Zn-coated steel sheet with excellent impact adhesion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0762563A true JPH0762563A (en) | 1995-03-07 |
| JP2961037B2 JP2961037B2 (en) | 1999-10-12 |
Family
ID=16964632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23404093A Expired - Lifetime JP2961037B2 (en) | 1993-08-26 | 1993-08-26 | Zn-coated steel sheet with excellent impact adhesion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2961037B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020051253A (en) * | 2000-12-22 | 2002-06-28 | 이구택 | Method of manufacturing high strength galvannealed steel sheets with good adhesion for automobiles |
| JP2008190030A (en) * | 2007-01-09 | 2008-08-21 | Nippon Steel Corp | Method and apparatus for producing high-strength cold-rolled steel sheet excellent in chemical conversion |
-
1993
- 1993-08-26 JP JP23404093A patent/JP2961037B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020051253A (en) * | 2000-12-22 | 2002-06-28 | 이구택 | Method of manufacturing high strength galvannealed steel sheets with good adhesion for automobiles |
| JP2008190030A (en) * | 2007-01-09 | 2008-08-21 | Nippon Steel Corp | Method and apparatus for producing high-strength cold-rolled steel sheet excellent in chemical conversion |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2961037B2 (en) | 1999-10-12 |
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