JPH06116780A - Production of zn-ni alloy electroplated steel sheet excellent in spot weldability - Google Patents
Production of zn-ni alloy electroplated steel sheet excellent in spot weldabilityInfo
- Publication number
- JPH06116780A JPH06116780A JP3020591A JP3020591A JPH06116780A JP H06116780 A JPH06116780 A JP H06116780A JP 3020591 A JP3020591 A JP 3020591A JP 3020591 A JP3020591 A JP 3020591A JP H06116780 A JPH06116780 A JP H06116780A
- Authority
- JP
- Japan
- Prior art keywords
- plating
- alloy
- steel sheet
- corrosion resistance
- phthalate
- 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.)
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Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は優れたスポット溶接性を
有し、自動車や家電用として好適なＺｎ−Ｎｉ系合金電
気めっき鋼板の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a Zn-Ni alloy electroplated steel sheet having excellent spot weldability and suitable for automobiles and home appliances.
【０００２】[0002]
【従来の技術】冷延鋼板の耐食性や塗装後耐食性を向上
させ、加工性を損なわずに量産できる表面処理鋼板とし
て電気亜鉛めっき鋼板が汎用されていることは周知であ
る。近年では寒冷地帯における冬期の道路凍結防止用の
散布岩塩に対する自動車の防錆対策として亜鉛めっき鋼
板の使用が試みられ、苛酷な腐食環境での高度な耐食性
が要求されている。亜鉛めっき鋼板の耐食性の向上要求
に対しては、亜鉛のめっき量（付着量）の増加という手
段があるが、これは溶接性や加工性の点で問題が多い。
そこで亜鉛自身の溶解を抑制し亜鉛めっきの寿命を延ば
す方法として、多くの合金めっきが提案されている。こ
れらの多くはＦｅ，Ｃｏ，Ｎｉといった鉄族金属を合金
成分として含有するＺｎ系合金めっきである。2. Description of the Related Art It is well known that electrogalvanized steel sheets are widely used as surface-treated steel sheets which improve the corrosion resistance of cold-rolled steel sheets and the corrosion resistance after coating and can be mass-produced without impairing workability. In recent years, the use of galvanized steel sheets has been tried as a rust preventive measure for automobiles against scattered rock salt for preventing road freezing in winter in cold regions, and high corrosion resistance in severe corrosive environments is required. In order to meet the demand for improving the corrosion resistance of galvanized steel sheets, there is a means of increasing the zinc coating amount (adhesion amount), but this has many problems in terms of weldability and workability.
Therefore, many alloy platings have been proposed as a method of suppressing the dissolution of zinc itself and extending the life of zinc plating. Most of these are Zn alloy plating containing an iron group metal such as Fe, Co and Ni as an alloy component.
【０００３】この内、Ｚｎ−Ｎｉ系合金めっき鋼板は、
特に未塗装耐食性に優れ、塗装後性能や加工性、溶接性
も良好なことから、自動車用防錆鋼板を始めとして広く
使用されている。しかしながら、要求品質の全てを十分
に満たすものではないことから、例えば特開平２−７０
０８９号公報では化成処理性に優れたＺｎ系合金めっき
の製造方法、特開平２−７００９１号公報では耐衝撃密
着性に優れたＺｎ−Ｎｉ合金めっき鋼板など、特定の性
能を向上させるための種々の技術が開示されている。最
近の動向として、自動車、家電用途を中心に省略化、省
エネルギー化のために、より低い電流値、加圧力でスポ
ット溶接が可能なスポット溶接性に優れたＺｎ−Ｎｉ系
合金めっき鋼板が望まれている。これに対しては、例え
ば特開平２−４７２９３号、４７２９４号公報の如く、
上層にＺｎの酸化物を形成させる方法が開示されている
が、電気めっき工程にさらに酸化物形成工程が加わるた
め、作業が煩雑化し、生産面で問題がある。Of these, Zn-Ni alloy plated steel sheets are
In particular, it has excellent unpainted corrosion resistance and good post-painting performance, workability, and weldability, and is therefore widely used, starting with rust-preventive steel sheets for automobiles. However, it does not sufficiently satisfy all the required qualities, and therefore, for example, Japanese Patent Laid-Open No. 2-70
No. 089 discloses a method for producing a Zn-based alloy plating having excellent chemical conversion treatability, and JP-A No. 2-70091 discloses a Zn-Ni alloy-plated steel sheet excellent in impact adhesion, and various other methods for improving specific performance. Is disclosed. As a recent trend, Zn-Ni alloy-plated steel sheets excellent in spot weldability capable of spot welding with a lower current value and pressure are desired for omission and energy saving mainly for automobiles and home appliances. ing. On the other hand, for example, as disclosed in JP-A-2-47293 and 47294,
Although a method of forming an oxide of Zn in the upper layer is disclosed, an oxide forming step is added to the electroplating step, which complicates the work and causes a problem in production.
【０００４】[0004]
【発明が解決しようとする課題】Ｚｎ−Ｎｉ系合金めっ
き鋼板のスポット溶接性を向上させるためには、Ｚｎ−
Ｎｉ系合金めっきそのものにスポット溶接性の向上機能
を付与する必要がある。Ｚｎ−Ｎｉ系合金めっきは純Ｚ
ｎめっきに比較して融点が高いので、スポット溶接時の
電極チップとめっき層間の通電経路は純Ｚｎめっきに比
べて広がりにくい。そのため、純Ｚｎめっきよりはスポ
ット溶接性は良好である。本発明者らは、これをさらに
向上させるためには、Ｚｎ−Ｎｉ系合金めっきの結晶形
態を制御する必要があると推定した。すなわち、Ｚｎ−
Ｎｉ系合金めっきは、Ｚｎ−Ｎｉの合金相であるγ相が
形成されるＮｉ含有率において高度の耐食性を発揮する
が、高耐食性が発現されるＮｉ含有率範囲におけるめっ
きの結晶形態は緻密で粗度が小さいため、スポット溶接
時には電極チップとめっき層が面接触する。この接触面
積を小さくすることができれば、溶接に必要な電流値や
加圧力を低減させることができる。そのためには、緻密
で粗度が小さいＺｎ−Ｎｉ系合金めっきの結晶を粗粒化
する必要がある。そこで本発明者らは、Ｚｎ−Ｎｉ系合
金めっきの結晶を粗粒化する方法について鋭意検討した
結果、本発明に到った。In order to improve the spot weldability of a Zn-Ni alloy plated steel sheet, Zn-
It is necessary to add a function of improving spot weldability to the Ni-based alloy plating itself. Zn-Ni alloy plating is pure Z
Since the melting point is higher than that of n-plating, the energization path between the electrode tip and the plating layer during spot welding is less likely to spread than pure Zn plating. Therefore, the spot weldability is better than that of pure Zn plating. The present inventors presumed that in order to further improve this, it is necessary to control the crystal morphology of Zn-Ni alloy plating. That is, Zn-
Ni-based alloy plating exhibits a high degree of corrosion resistance at the Ni content rate at which the γ phase, which is a Zn-Ni alloy phase, is formed, but the crystal morphology of the plating is dense in the Ni content range where high corrosion resistance is exhibited. Since the roughness is small, the electrode tip and the plating layer make surface contact during spot welding. If this contact area can be reduced, the current value and the pressing force required for welding can be reduced. For that purpose, it is necessary to coarsen the crystals of the Zn-Ni based alloy plating that is dense and has a low roughness. Therefore, the inventors of the present invention have earnestly studied the method of coarsening the crystals of Zn-Ni alloy plating, and have reached the present invention.
【０００５】[0005]
【課題を解決するための手段】本発明の要旨は、Ｚｎ−
Ｎｉ系合金電気めっき鋼板の製造に際して、Ｚｎ−Ｎｉ
系合金めっき浴中にＳｂを０．５〜３ppm とフタル酸エ
ステル化合物を１０〜２００ppm 含有させて、電流密度
１０〜１５０Ａ／dm2 で鋼板に電気めっきを行なうこと
を特徴とするスポット溶接性に優れたＺｎ−Ｎｉ系合金
電気めっき鋼板の製造方法である。The gist of the present invention is Zn-
When manufacturing a Ni-based alloy electroplated steel sheet, Zn-Ni
The spot weldability is characterized in that the steel alloy plating bath contains 0.5 to 3 ppm of Sb and 10 to 200 ppm of a phthalate ester compound, and electroplates a steel sheet at a current density of 10 to 150 A / dm 2. This is a method for producing an excellent Zn-Ni alloy electroplated steel sheet.
【０００６】[0006]
【作用】本発明の特徴は、Ｚｎ−Ｎｉ系合金めっき浴に
微量のＳｂ（アンチモン）とフタル酸エステル化合物を
含有させて電気めっきを行なう点である。Ｚｎ−Ｎｉ系
合金めっき鋼板の耐食性はＮｉ含有率に支配され、γＺ
ｎ−Ｎｉ相が形成され、αＮｉ相が形成されない範囲、
すなわちＮｉ含有率５〜２０％で高耐食性を発揮し、１
０〜１５％のγ単相領域においては特に優れた耐食性を
発揮する。A feature of the present invention is that electroplating is performed by adding a small amount of Sb (antimony) and a phthalate compound to a Zn-Ni alloy plating bath. The corrosion resistance of Zn-Ni alloy plated steel sheet is governed by the Ni content, and γZ
a range in which the n-Ni phase is formed and the αNi phase is not formed,
That is, Ni content of 5 to 20% shows high corrosion resistance,
Particularly excellent corrosion resistance is exhibited in the 0 to 15% γ single phase region.
【０００７】γ相のめっき結晶は緻密で粗度が小さいの
で、スポット溶接時に電極チップとめっき層が面接触す
るため、スポット溶接に必要な電流値や加圧力を低減で
きない。Since the γ-phase plated crystal is dense and has a low roughness, the electrode tip and the plating layer are in surface contact during spot welding, so that the current value and the pressing force required for spot welding cannot be reduced.
【０００８】ところが、Ｚｎ−Ｎｉ系合金めっき浴の中
にＳｂとフタル酸エステル化合物を微量添加し、適当な
条件で電解することにより、直径が１〜３μの粒状のめ
っき結晶が得られる。この粒状結晶はめっき表層のみに
形成され、粒状結晶の下にはＺｎ−Ｎｉ系合金めっき本
来の緻密な結晶が形成される。めっき表層にかかる粒状
結晶が形成されたＺｎ−Ｎｉ系合金めっきにおいては、
スポット溶接の電極チップとめっき層の接触面積が小さ
くなるため、緻密で低粗度の従来のＺｎ−Ｎｉ系合金め
っきに比較して、スポット溶接に必要な電流値や加圧力
を低減させることができる。例えば電流値を１〜３割、
加圧力を２〜３割低減させることができる。このような
結晶形態の変化に伴ない耐食性の劣化が懸念されるとこ
ろであるが、Ｎｉ含有率を耐食性良好域に制御しておけ
ば耐食性劣化については、無視しうるレベルである。However, a small amount of Sb and a phthalic acid ester compound are added to a Zn-Ni alloy plating bath and electrolysis is performed under appropriate conditions to obtain a granular plating crystal having a diameter of 1 to 3 μm. The granular crystals are formed only on the surface layer of the plating, and under the granular crystals, the dense crystals inherent to the Zn—Ni alloy plating are formed. In the Zn-Ni alloy plating in which the granular crystals of the plating surface layer are formed,
Since the contact area between the electrode tip and the plating layer in spot welding is small, it is possible to reduce the current value and pressure required for spot welding, as compared with conventional Zn-Ni alloy plating with high precision and low roughness. it can. For example, the current value is 10-30%,
The applied pressure can be reduced by 20 to 30%. Although there is a concern that the corrosion resistance will deteriorate due to such a change in crystal morphology, if the Ni content is controlled to a good corrosion resistance region, the corrosion resistance deterioration is at a negligible level.
【０００９】Ｓｂの添加量は０．５〜３ppm 、フタル酸
エステル化合物の添加量は、１０〜２００ppm が適当で
ある。それぞれ、下限未満では結晶形態への影響が顕著
でなく、上限を超えると耐食性劣化が無視できなくなる
ので、好ましくない。より好ましい範囲は、Ｓｂが１〜
３ppm 、フタル酸エステル化合物が２０〜１００ppmで
ある。フタル酸エステル化合物とは、次に示すモノエス
テル、The Sb content is 0.5 to 3 ppm, and the phthalate compound content is 10 to 200 ppm. If it is less than the lower limit, the influence on the crystal form is not remarkable, and if it exceeds the upper limit, deterioration of corrosion resistance cannot be ignored, which is not preferable. A more preferable range is that Sb is 1 to
3 ppm, and phthalate compound is 20 to 100 ppm. Phthalic acid ester compound, the following monoester,
【００１０】[0010]
【化１】 [Chemical 1]
【００１１】をさし、特にフタル酸ジエステル類が有効
である。フタル酸ジエステル類の中でも、 Ｒ＝Ｒ′＝Ｃ4 Ｈ9 であるフタル酸ジブチル Ｒ＝Ｒ′＝Ｃ8 Ｈ17であるフタル酸ジイソオクチル、ま
たはフタル酸ジオクチル Ｒ＝Ｒ′＝Ｃ10Ｈ21であるフタル酸ジイソデシル、また
はフタル酸ジデシル Ｒ＝Ｒ′＝Ｃ12Ｈ25であるフタル酸ジラウリル Ｒ＝Ｃ8 Ｈ17，Ｒ′＝Ｃ10Ｈ21であるフタル酸デシルイ
ソオクチルがとりわけ効果が大きい。Particularly, phthalic acid diesters are effective. Among phthalic acid diesters, R = R ′ = C 4 H 9 dibutyl phthalate R = R ′ = C 8 H 17 diisooctyl phthalate or dioctyl phthalate R = R ′ = C 10 H 21 there diisodecyl phthalate or didecyl phthalate R = R '= C 12 H 25 in which phthalic acid dilauryl R = C 8 H 17, R ' = C phthalate decyl isooctyl are especially large effect is 10 H 21,.
【００１２】Ｓｂとフタル酸エステル化合物を添加した
めっき浴から、上記のＺｎ−Ｎｉ系合金めっきを得るた
めには、さらに電流密度１０〜１５０Ａ／dm2 とする必
要がある。Ｓｂとフタル酸エステル化合物は電解時に陰
極である鋼板面に吸着してＺｎ−Ｎｉの電析に影響を及
ぼすものと推定されるが、微量であるため、高電流密度
では拡散律速となり、Ｚｎ−Ｎｉの電析に追随できなく
なり、したがって結晶形態への作用が低下する。このよ
うな理由から、電流密度の上限は１５０Ａ／dm2 とす
る。また生産効率の面から、１０Ａ／dm2 以下の低電流
密度は好ましくない。In order to obtain the above Zn-Ni alloy plating from a plating bath containing Sb and a phthalate compound, it is necessary to further increase the current density to 10 to 150 A / dm 2 . It is presumed that Sb and the phthalic acid ester compound are adsorbed on the surface of the steel plate which is the cathode during electrolysis, and influence the electrodeposition of Zn-Ni. It becomes impossible to follow the electrodeposition of Ni, and therefore the action on the crystal morphology is reduced. For this reason, the upper limit of the current density is 150 A / dm 2 . In addition, a low current density of 10 A / dm 2 or less is not preferable from the viewpoint of production efficiency.
【００１３】本発明で対象とするＺｎ−Ｎｉ系合金めっ
きとは、主としてＮｉを含有するＺｎめっきであり、具
体的にはＺｎ−Ｎｉ、あるいはＺｎ−Ｎｉ−Ｃｏ，Ｚｎ
−Ｎｉ−Ｆｅ，Ｚｎ−Ｎｉ−Ｃｒ，Ｚｎ−Ｎｉ−Ｆｅ−
ＣｒなどＺｎ−Ｎｉに他の金属成分を含有するものを指
す。Ｎｉ含有率は５〜２０重量％が好ましい。５重量％
未満では耐食性が不足し、２０重量％を超えると加工性
が劣化するので好ましくない。より好ましい範囲は１０
〜１５重量％である。Ｎｉ以外の金属成分は、総量で５
重量％未満が好ましく、５重量％以上ではＮｉの効果が
減殺されるので好ましくない。付着量については１０〜
５０ｇ／ｍ2 が好ましい。The Zn-Ni alloy plating which is the object of the present invention is a Zn plating mainly containing Ni, specifically Zn-Ni, Zn-Ni-Co, Zn.
-Ni-Fe, Zn-Ni-Cr, Zn-Ni-Fe-
This refers to Zn-Ni containing other metal components such as Cr. The Ni content is preferably 5 to 20% by weight. 5% by weight
If it is less than 20% by weight, the corrosion resistance is insufficient, and if it exceeds 20% by weight, the workability is deteriorated, which is not preferable. More preferable range is 10
~ 15% by weight. The total amount of metal components other than Ni is 5
It is preferably less than 5% by weight, and not more than 5% by weight because the effect of Ni is diminished. About the adhesion amount is 10
50 g / m 2 is preferred.
【００１４】めっき浴に関して、金属イオン濃度、pH、
浴温などについては特に制約はなく、例えばＺｎ2+，Ｎ
ｉ2+イオンを全濃度で０．５〜２．５モル／ｌ、pH０．
５〜６、浴温４０〜７０℃の硫酸酸性浴、もしくは塩化
物浴を用いることができるが、不溶性電極を用いること
ができる硫酸酸性浴の使用が有利である。めっき浴中に
は、必要に応じてＦｅ2+，Ｃｏ2+，Ｃｒ3+イオンなどを
少量含有させてもよく、電導度を高めるために、Ｎ
ａ+ ，ＮＨ4 + ，Ｋ+ ，Ｍｇ2+イオンなどの無関係塩を
添加してもよい。液流速については、Ｓｂとフタル酸エ
ステル化合物の添加効果を鋼板上に均一に発揮させるた
めに、１０〜２００ｍ／min とすることが好ましい。Regarding the plating bath, metal ion concentration, pH,
There are no particular restrictions on the bath temperature, for example Zn 2+ , N
i 2+ ions at a total concentration of 0.5 to 2.5 mol / l, pH of 0.
Although a sulfuric acid acidic bath having a bath temperature of 5 to 6 and a bath temperature of 40 to 70 ° C. or a chloride bath can be used, it is advantageous to use a sulfuric acid acidic bath capable of using an insoluble electrode. The plating bath may contain a small amount of Fe 2+ , Co 2+ , Cr 3+ ions, etc., if necessary.
Irrelevant salts such as a + , NH 4 + , K + and Mg 2+ ions may be added. The liquid flow rate is preferably 10 to 200 m / min in order to uniformly exert the effect of adding Sb and the phthalate compound on the steel sheet.
【００１５】[0015]
【実施例】板厚０．８mmの冷延鋼板（深絞り用低炭素鋼
板）を、アルカリ脱脂し、５％硫酸水溶液で酸洗した
後、種々のめっき条件で付着量３０ｇ／ｍ2 のＺｎ−Ｎ
ｉ系合金めっきを行なった。めっき浴としては硫酸酸性
浴を用い、これにＳｂ（酸化アンチモン：Ｓｂ2 Ｏ3 を
使用）とフタル酸エステル化合物を添加した。こうして
得られたＺｎ−Ｎｉ系合金めっき鋼板のめっき組成を分
析し、スポット溶接性と耐食性を評価した。これらをま
とめて表１に示した。表１におけるフタル酸エステル化
合物は以下の通りである。 Ａ：フタル酸ジブチル Ｂ：フタル酸ジオクチル Ｃ：フタル酸ジデシル Ｄ：フタル酸ジラリウル Ｅ：フタル酸デシルイソオクチル また、スポット溶接性と耐食性の評価方法を以下に示
す。 （１）スポット溶接性 先端径６mmφのＣＦ型電極を用い、加圧力１５０kg，２
００kg，通電時間１０サイクルで、スポット溶接を行な
い、４．５mm径のナゲットを形成する電流値で評価し
た。 加圧力１５０kgでナゲット形成電流が６kA未満：◎ 加圧力１５０kgでナゲット形成電流が６〜８kA：○ 加圧力２００kgでナゲット形成電流が６〜８kA：× （２）耐食性 めっきのまま塩水噴霧試験（ＪＩＳ Ｚ２３７１）を５
００時間行なった時の赤錆発生面積で評価した。 赤錆発生面積１％未満： ◎ １〜５％： ○ ５％超 ： × 表１において、本発明例１〜２は比較例１と対比され
る。本発明例１〜２は、めっき浴中にＳｂ及びフタル酸
エステル化合物が添加されていない比較例１に比べて、
スポット溶接性が良好であり、耐食性も同等である。本
発明例３〜８は比較例２〜７と対比される。本発明例３
〜８は、めっき浴中にＳｂ及びフタル酸エステル化合物
が添加されていない比較例２、あるいはＳｂもしくはフ
タル酸エステル化合物のいずれかが添加されていない比
較例３，４に比べて、スポット溶接性が良好であり、耐
食性も同等である。EXAMPLE A cold-rolled steel sheet having a thickness of 0.8 mm (low-carbon steel sheet for deep drawing) was degreased with alkali, pickled with a 5% sulfuric acid aqueous solution, and then coated with Zn having an adhesion amount of 30 g / m 2 under various plating conditions. -N
i-based alloy plating was performed. A sulfuric acid acidic bath was used as a plating bath, and Sb (antimony oxide: Sb 2 O 3 was used) and a phthalic acid ester compound were added thereto. The Zn-Ni alloy plated steel sheet thus obtained was analyzed for its plating composition to evaluate spot weldability and corrosion resistance. These are summarized in Table 1. The phthalate compound in Table 1 is as follows. A: Dibutyl phthalate B: Dioctyl phthalate C: Didecyl phthalate D: Dilaril phthalate E: Decyl isooctyl phthalate Further, the evaluation methods of spot weldability and corrosion resistance are shown below. (1) Spot weldability A CF type electrode with a tip diameter of 6 mmφ is used and a pressure of 150 kg, 2
Spot welding was carried out at 00 kg for 10 cycles of energization time, and evaluation was made by the current value for forming a 4.5 mm diameter nugget. Nugget forming current is less than 6 kA at applied pressure of 150 kg: ◎ Nugget forming current is 6 to 8 kA at applied pressure of 150 kg: ○ Nugget forming current is 6 to 8 kA at applied pressure of 200 kg: × (2) Corrosion resistance Salt spray test (JIS) Z2371) 5
It was evaluated by the area where red rust was generated when the test was performed for 00 hours. Red rust occurrence area less than 1%: ◎ 1 to 5%: ○ more than 5%: × In Table 1, Examples 1 to 2 of the present invention are compared with Comparative Example 1. Inventive Examples 1 and 2 were compared with Comparative Example 1 in which Sb and phthalate compound were not added in the plating bath.
Good spot weldability and equivalent corrosion resistance. The invention examples 3 to 8 are compared with the comparative examples 2 to 7. Invention Example 3
Nos. 8 to 8 are spot weldability as compared with Comparative Example 2 in which Sb and phthalate ester compound are not added in the plating bath or Comparative Examples 3 and 4 in which neither Sb nor phthalate ester compound is added. Is good and the corrosion resistance is the same.
【００１６】しかし、比較例５，６のようにめっき浴中
のＳｂもしくはフタル酸エステル化合物が多すぎると、
耐食性は劣化する。また、比較例７のように、めっき浴
中に適当量のＳｂ及びフタル酸エステル化合物が添加さ
れていても電流密度が高すぎると、スポット溶接性に効
果がない。少量のＣｏ，Ｆｅ，Ｃｒを含む本発明例１３
〜１５と他の本発明例も、Ｓｂ及びフタル酸エステル化
合物の添加によるスポット溶接性の向上効果は明らかで
あり、耐食性の低下も認められない。However, if the Sb or phthalate compound is too much in the plating bath as in Comparative Examples 5 and 6,
Corrosion resistance deteriorates. Further, as in Comparative Example 7, even if an appropriate amount of Sb and a phthalate compound is added to the plating bath, if the current density is too high, there is no effect on spot weldability. Inventive Example 13 containing a small amount of Co, Fe, Cr
In Examples 15 to 15 and other examples of the present invention, the effect of improving the spot weldability by adding Sb and the phthalic acid ester compound is clear, and the corrosion resistance is not deteriorated.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【発明の効果】本発明のＺｎ−Ｎｉ系合金電気めっき鋼
板の製造方法によれば、Ｚｎ−Ｎｉ系合金めっき本来の
高耐食性を維持しつつ、スポット溶接性を向上させるこ
とが可能であり、より優れたスポット溶接性を要求され
る自動車、家電用途に好適なＺｎ−Ｎｉ系合金電気めっ
き鋼板を提供することができる。EFFECTS OF THE INVENTION According to the method for producing a Zn-Ni alloy electroplated steel sheet of the present invention, it is possible to improve the spot weldability while maintaining the high corrosion resistance inherent to Zn-Ni alloy plating. It is possible to provide a Zn-Ni-based alloy electroplated steel sheet suitable for automobiles and home appliances that require better spot weldability.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成３年５月３０日[Submission date] May 30, 1991
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１８[Correction target item name] 0018
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１８】[0018]
【表２】 [Table 2]
Claims (1)
に際して、Ｚｎ−Ｎｉ系合金めっき浴中にＳｂを０．５
〜３ppm とフタル酸エステル化合物を１０〜２００ppm
含有させて、電流密度１０〜１５０Ａ／dm2 で鋼板に電
気めっきを行なうことを特徴とするスポット溶接性に優
れたＺｎ−Ｎｉ系合金電気めっき鋼板の製造方法。1. When manufacturing a Zn—Ni based alloy electroplated steel sheet, 0.5% Sb is added to a Zn—Ni based alloy plating bath.
~ 3ppm and 10-200ppm phthalate compound
Be contained, the current density 10~150A / dm method for producing superior Zn-Ni alloy electroplated steel sheet 2 in the steel sheet in spot weldability, characterized by performing electroplating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3020591A JPH07103475B2 (en) | 1991-02-25 | 1991-02-25 | Method for producing Zn-Ni alloy electroplated steel sheet excellent in spot weldability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3020591A JPH07103475B2 (en) | 1991-02-25 | 1991-02-25 | Method for producing Zn-Ni alloy electroplated steel sheet excellent in spot weldability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06116780A true JPH06116780A (en) | 1994-04-26 |
| JPH07103475B2 JPH07103475B2 (en) | 1995-11-08 |
Family
ID=12297238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3020591A Expired - Lifetime JPH07103475B2 (en) | 1991-02-25 | 1991-02-25 | Method for producing Zn-Ni alloy electroplated steel sheet excellent in spot weldability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103475B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005093133A1 (en) * | 2004-02-26 | 2005-10-06 | Atotech Deutschland Gmbh | Baths, systems and processes for electroplating zinc-nickel ternary and higher alloys and articles so electroplated |
-
1991
- 1991-02-25 JP JP3020591A patent/JPH07103475B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005093133A1 (en) * | 2004-02-26 | 2005-10-06 | Atotech Deutschland Gmbh | Baths, systems and processes for electroplating zinc-nickel ternary and higher alloys and articles so electroplated |
| US7442286B2 (en) | 2004-02-26 | 2008-10-28 | Atotech Deutschland Gmbh | Articles with electroplated zinc-nickel ternary and higher alloys, electroplating baths, processes and systems for electroplating such alloys |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07103475B2 (en) | 1995-11-08 |
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