EP0061130B1 - Process for the galvanic deposit of a zinc-nickel-alloy layer on a metal object, in particular on steel strip - Google Patents

Process for the galvanic deposit of a zinc-nickel-alloy layer on a metal object, in particular on steel strip Download PDF

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Publication number
EP0061130B1
EP0061130B1 EP82102134A EP82102134A EP0061130B1 EP 0061130 B1 EP0061130 B1 EP 0061130B1 EP 82102134 A EP82102134 A EP 82102134A EP 82102134 A EP82102134 A EP 82102134A EP 0061130 B1 EP0061130 B1 EP 0061130B1
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EP
European Patent Office
Prior art keywords
nickel
alloy
zinc
metal object
anodes
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EP82102134A
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German (de)
French (fr)
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EP0061130A1 (en
Inventor
Richard Elzer
Karl-Heinz Kilian
Johannes Siewert
Hans-Ulrich Weigel
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Rasselstein AG
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Rasselstein AG
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Priority to AT82102134T priority Critical patent/ATE11796T1/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc

Definitions

  • the invention relates to a method for the electrodeposition of a zinc-nickel alloy coating on a metal object, in particular on steel strip, using soluble anodes containing the alloying elements.
  • Strip steels with zinc-nickel alloy coatings are used when corrosion resistance is required. It is important that they retain good corrosion resistance even when deformed. In this regard, known galvanic deposition methods lead to unsatisfactory results.
  • the alloy coating contains a predetermined constant percentage composition of the alloying elements.
  • the deposition of an alloy coating with a constant composition depends on various factors, primarily on the concentration of the various alloy elements in the electrolyte. A simple control of the concentration of the different alloying elements in the electrolyte has so far been practically impossible.
  • the invention has for its object to provide a method for the galvanic deposition of a zinc-nickel alloy coating on a metal object, especially on steel strip, of the type mentioned, which leads to alloy coatings with good corrosion resistance even in the deformed state. Furthermore, it should be possible in a simple manner to control the concentration of the different alloying elements in the electrolyte and thus to deposit a zinc-nickel alloy coating with a desired constant percentage composition.
  • the object is achieved according to the invention in that prior to the galvanic deposition of the alloy coating, an intensive currentless pretreatment of the metal object with the electrolyte at a relative flow rate of at least 2 m / s. and a treatment time of at least 5 seconds.
  • Controlling the concentration of the different alloy elements in the electrolyte and thus the deposition of an alloy coating with a desired constant percentage composition is achieved by connecting the anodes containing different alloy elements to separate power supplies and controlling the current at the anodes separately.
  • the method is expediently carried out in such a way that in each case several anodes of an alloy element, for. B. zinc, arranged in a common anode basket and this to its own, from power supplies to anode baskets, the anodes of another alloy element, for. B. contain nickel, separate power supply connects.
  • an alloy element for. B. zinc
  • the anodes of another alloy element for. B. contain nickel
  • the drawing schematically shows a system for the galvanic deposition of a zinc-nickel alloy coating on a steel strip 1.
  • This steel strip 1 is to be provided with such an alloy coating on one side.
  • the steel strip 1 is connected via the current supply rollers 2 as a cathode.
  • the steel strip 1 Before the steel strip 1 runs through the electrolyte tanks, it is subjected to a pretreatment at 20 on the side to be coated by being electrolessly sprayed with it in order to deposit a zinc-nickel-containing thin primary layer on the strip.
  • An anode basket 4 which is filled with zinc anodes 5, is arranged in a first tank 3 filled with a suitable electrolyte.
  • This anode basket is connected to a power supply 6.
  • the electrical circuit 7 the structure of which is known per se, the current can be controlled as a function of the coating thickness, the belt speed, the belt width and the desired composition of the alloy coating.
  • the current supply 11 to the second anode basket 9 is independent of the first current supply 6.
  • the current at the anode basket 9 can be regulated independently of the anode basket 4 via a circuit 12 corresponding to the circuit 7.
  • Zinc is first dissolved in tank 3 on the steel belt 1 passing through the system from right to left. Nickel is then dissolved in tank 8. The metal is deposited in both tanks 3, 8 as an alloy. The separate current control on the anode baskets 4 and 9 influences the concentration of zinc and nickel in the electrolyte, thereby keeping the composition of the deposited alloy constant in the desired ratio.
  • the electrolyte is the same in both tanks 3, 8 and is supplied to the tanks 3, 8 from a common storage container 13.
  • each anode basket 4 or 9 it would also be conceivable to provide an electrically insulated construction of each anode basket 4 or 9 according to the inlet and outlet strand of the strip 1.

Abstract

When electro-plating an alloy layer on a metal object, especially when depositing a zinc-nickel coating on a steel strip (1), the electro-plating of the alloy coating is preceded by a previous intensive treatment (20) without current intended to deposit a primary layer containing zinc and nickel so that the electro-plating can be performed on this layer. In order to obtain a constant composition of the coating components separate electrodes are used containing only one of the elements of the alloy (5) (10), connected to separate current circuits to control the current separately for the anodes having distinct elements of the alloy.

Description

Die Erfindung betrifft ein Verfahren zum galvanischen Abscheiden eines Zink-Nickel-Legierungsüberzuges auf einem Metallgegenstand, insbesondere auf Bandstahl, unter Verwendung löslicher, die Legierungselemente enthaltender Anoden.The invention relates to a method for the electrodeposition of a zinc-nickel alloy coating on a metal object, in particular on steel strip, using soluble anodes containing the alloying elements.

Bandstähle mit Zink-Nickel-Legierungsüberzügen finden Verwendung, wenn Korrosionsbeständigkeit gefordert wird. Dabei ist wichtig, daß sie auch im verformten Zustand eine gute Korrosionsbeständigkeit behalten. Diesbezüglich führen bekannte galvanische Abscheidungsverfahren zu nicht ganz befriedigenden Ergebnissen.Strip steels with zinc-nickel alloy coatings are used when corrosion resistance is required. It is important that they retain good corrosion resistance even when deformed. In this regard, known galvanic deposition methods lead to unsatisfactory results.

Bei dem galvanischen Abscheiden eines Zink-Nickel-Legierungsüberzuges auf einem Metallgegenstand, insbesondere auf Bandstahl, kommt es auch darauf an, daß der Legierungsüberzug eine vorbestimmte konstante prozentuale Zusammensetzung der Legierungselemente enthält. Die Abscheidung eines Legierungsüberzuges mit einer konstanten Zusammensetzung hängt jedoch von verschiedenen Faktoren, in erster Linie von der Konzentration der verschiedenen Legierungselemente im Elektrolyten ab. Eine einfache Steuerung der Konzentration der verschiedenen Legierungselemente im Elektrolyten ist bisher praktisch nicht möglich.When galvanically depositing a zinc-nickel alloy coating on a metal object, in particular on steel strip, it is also important that the alloy coating contains a predetermined constant percentage composition of the alloying elements. However, the deposition of an alloy coating with a constant composition depends on various factors, primarily on the concentration of the various alloy elements in the electrolyte. A simple control of the concentration of the different alloying elements in the electrolyte has so far been practically impossible.

Bei einem bekannten Verfahren zum galvanischen Abscheiden eines Zink-Nickel-Legierungsüberzuges auf einem Stahldraht (US-PS 2419231) wurden getrennte Nickel- und Zinkanoden verwendet, deren jeweilige Oberfläche in einem Verhältnis gewählt wurde, wie die gewünschte prozentuale Zusammensetzung des Legierungsüberzuges. Es wurden hierbei eine Vielzahl von Zinkanoden und Nickelanoden auf einem gemeinsamen Anodenträger so verteilt, daß sich die gewünschte Stromverteilung ergab. Hierbei führte jedoch jede Änderung der Verfahrensbedingungen, beispielsweise der Stromdichte oder der Abscheidungsspannung zu einer Verschiebung in der Konzentration des Elektrolyten und damit zu einer unkontrollierbaren Änderung der Legierungszusammensetzung und zu Abweichungen in der Beschichtungsdicke. Auch war es bei dem bekannten Verfahren nur möglich, die Legierungszusammensetzung dadurch zu ändern, daß man das jeweilige Verhältnis der auf dem Anodenträger angeordneten Nickel-und Zinkanoden änderte, was einen erheblichen Arbeitsaufwand bedeutete.In a known method for electrodepositing a zinc-nickel alloy coating on a steel wire (US Pat. No. 2,419,231), separate nickel and zinc anodes were used, the respective surface of which was selected in a ratio such as the desired percentage composition of the alloy coating. A large number of zinc anodes and nickel anodes were distributed on a common anode support in such a way that the desired current distribution was obtained. However, every change in the process conditions, for example the current density or the deposition voltage, led to a shift in the concentration of the electrolyte and thus to an uncontrollable change in the alloy composition and to deviations in the coating thickness. In the known method it was also only possible to change the alloy composition by changing the respective ratio of the nickel and zinc anodes arranged on the anode carrier, which meant a considerable amount of work.

In Dettner, Elze »Handbuch der Galvanotechnik« Band II, Carl Hanser Verlag 1966, Seiten 468/ 469 ist beschrieben, zur Abscheidung von Nickel-Kobalt-Legierungen einen Elektrolyten zu verwenden, der Nickel und Kobalt in einem bestimmten Verhältnis enthält, wobei zur Aufrechterhaltung der konstanten Zusammensetzung des Elektrolyten Anoden aus beiden Metallen mit getrennten Stromkreisen empfehlenswert seien. Zur Aufrechterhaltung einer konstanten Elektrolytzusammensetzung müsse man entweder Anoden aus Legierungen mit hohem Kobaltgehalt (70%) oder Anoden aus den einzelnen Metallen mit einem Oberflächenverhältnis Kobalt : Nikkel = 3 : 1 verwenden. Eine Steuerungsmöglichkeit zur Anpassung an veränderte Verfahrensbedingungen oder zur Änderung der Legierungszusammensetzung ist auch hier nicht gegeben.In Dettner, Elze "Handbuch der Galvanotechnik" Volume II, Carl Hanser Verlag 1966, pages 468/469 it is described to use an electrolyte for the deposition of nickel-cobalt alloys, which contains nickel and cobalt in a certain ratio, while maintaining Given the constant composition of the electrolyte, anodes made of both metals with separate circuits are recommended. To maintain a constant electrolyte composition, either anodes made of alloys with a high cobalt content (70%) or anodes made of the individual metals with a surface ratio of cobalt: nickel = 3: 1 had to be used. There is also no control option for adapting to changed process conditions or changing the alloy composition.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum galvanischen Abscheiden eines Zink-Nickel-Legierungsüberzuges auf einem Metallgegenstand, insbesondere auf Bandstahl, der eingangs erwähnten Art zu schaffen, das zu Legierungsüberzügen mit guter Korrosionsbeständigkeit auch im verformten Zustand führt. Weiter soll in einfacher Weise eine Steuerung der Konzentration der unterschiedlichen Legierungselemente im Elektrolyten und damit die Abscheidung eines Zink-Nickel-Legierungsüberzuges mit einer gewünschten konstanten prozentualen Zusammensetzung möglich sein.The invention has for its object to provide a method for the galvanic deposition of a zinc-nickel alloy coating on a metal object, especially on steel strip, of the type mentioned, which leads to alloy coatings with good corrosion resistance even in the deformed state. Furthermore, it should be possible in a simple manner to control the concentration of the different alloying elements in the electrolyte and thus to deposit a zinc-nickel alloy coating with a desired constant percentage composition.

Die gestellte Aufgabe wird nach der Erfindung dadurch gelöst, daß vor dem galvanischen Abscheiden des Legierungsüberzuges eine intensive stromlose Vorbehandlung des Metallgegenstandes mit dem Elektrolyten bei einer Relativströmungsgeschwindigkeit von mindestens 2 m/S. und einer Behandlungszeit von mindestens 5 Sekunden erfolgt.The object is achieved according to the invention in that prior to the galvanic deposition of the alloy coating, an intensive currentless pretreatment of the metal object with the electrolyte at a relative flow rate of at least 2 m / s. and a treatment time of at least 5 seconds.

Überraschenderweise hat sich bei Versuchen zur Herstellung einer Zink-Nickel-Beschichtung herausgestellt, daß eine gute Korrosionsbeständigkeit dieses Werkstoffs im verformten Zustand nur erhalten wird, wenn dem galvanischen Abscheidungsprozeß eine intensive stromlose Vorbehandlung des Metallgegenstandes wie des Bandstahls mit dem Elektrolyten vorangeht, und zwar bei einer Strömungsgeschwindigkeit am Band von mindestens 2 m/S. und einer Behandlungszeit von mindestens 5 Sekunden. Die stromlose Vorbehandlung kann dabei vonstatten gehen, indem der Bandstahl zunächst ein stromloses Elektrolytbad durchläuft oder indem der Elektrolyt auf den vorbeilaufenden Bandstahl aufgesprüht wird. Durch diese intensive stromlose Vorbehandlung unter hoher Relativgeschwindigkeit zwischen Elektrolytbad und Band wird eine zink-nickel-haltige dünne Primärschicht abgeschieden, so daß anschließend die eigentliche elektrolytische Zink-Nickel-Beschichtung auf dieser Primärschicht erfolgt.Surprisingly, it has been found in tests for the production of a zinc-nickel coating that good corrosion resistance of this material in the deformed state can only be obtained if the galvanic deposition process is preceded by an intensive electroless pretreatment of the metal object, such as the steel strip, with the electrolyte, namely in one Flow speed on the belt of at least 2 m / s. and a treatment time of at least 5 seconds. The electroless pretreatment can be carried out by first passing the steel strip through an electroless electrolytic bath or by spraying the electrolyte onto the steel strip passing by. This intensive electroless pretreatment at a high relative speed between the electrolyte bath and the strip deposits a thin zinc-nickel-containing primary layer, so that the actual electrolytic zinc-nickel coating then takes place on this primary layer.

Eine Steuerung der Konzentration der unterschiedlichen Legierungselemente im Elektrolyten und damit die Abscheidung eines Legierungsüberzuges mit einer gewünschten konstanten prozentualen Zusammensetzung wird dadurch erreicht, daß man die jeweils unterschiedliche Legierungselemente enthaltenden Anoden an getrennte Stromzuführungen anschließt und den Strom an den Anoden getrennt steuert.Controlling the concentration of the different alloy elements in the electrolyte and thus the deposition of an alloy coating with a desired constant percentage composition is achieved by connecting the anodes containing different alloy elements to separate power supplies and controlling the current at the anodes separately.

Dies bedeutet, daß man mehrere Zinkanoden an einem gemeinsamen Anodenträger anordnet und diesen an eine eigene Stromzuführung anschließt. Anoden, die das zweite Legierungselement, Nickel, enthalten, werden an einem anderen Anodenträger angeordnet, der an eine zweite, getrennte Stromzuführung angeschlossen ist. Diese Anordnung hat den Vorteil, daß man durch unterschiedliche Steuerung des Stromes an den beiden Zink- bzw. Nickel-Anodenträgern die Konzentration der Komponenten im Elektrolyten leicht regeln kann. Die jeweils nur ein Legierungselement enthaltenden Anodenträger können hierbei in zwei verschiedenen Elektrolyttanks angeordnet sein, die miteinander über einen Vorratstank verbunden sind, so daß die Zusammensetzung des Elektrolyten, trotz getrennter Anodenträger, die Abscheidung einer einheitlichen Legierungszusammensetzung gewährleistet. Durch entsprechende Steuerung der Stromführung kann man in einfacher Weise auch andere prozentuale Zusammensetzungen des Legierungsüberzuges im Hinblick auf Erreichen einer guten Korrosionsbeständigkeit erhalten und diese Zusammensetzung auch dann konstant halten.This means that several zinc anodes are arranged on a common anode support and this is connected to its own power supply. Anodes which are the second alloying element ment, nickel, are arranged on another anode support, which is connected to a second, separate power supply. This arrangement has the advantage that the concentration of the components in the electrolyte can easily be regulated by differently controlling the current on the two zinc or nickel anode carriers. The anode supports each containing only one alloy element can be arranged in two different electrolyte tanks, which are connected to one another via a storage tank, so that the composition of the electrolyte, despite the separate anode supports, ensures the deposition of a uniform alloy composition. By appropriately controlling the current flow, other percentage compositions of the alloy coating can be obtained in a simple manner with a view to achieving good corrosion resistance, and this composition can then also be kept constant.

Zweckmäßig wird das Verfahren so durchgeführt, daß man jeweils mehrere Anoden eines Legierungselementes, z. B. Zink, in einem gemeinsamen Anodenkorb anordnet und diesen an eine eigene, von Stromzuführungen zu Anodenkörben, die Anoden eines anderen Legierungselementes, z. B. Nickel, enthalten, getrennte Stromzuführung anschließt.The method is expediently carried out in such a way that in each case several anodes of an alloy element, for. B. zinc, arranged in a common anode basket and this to its own, from power supplies to anode baskets, the anodes of another alloy element, for. B. contain nickel, separate power supply connects.

Anhand der Zeichnung soll das erfindungsgemäße Verfahren kurz erläutert werden.The method according to the invention will be briefly explained with the aid of the drawing.

Die Zeichnung zeigt schematisch eine Anlage zum galvanischen Abscheiden eines Zink-Nickel-Legierungsüberzuges auf ein Stahlband 1. Dieses Stahlband 1 soll einseitig mit einem derartigen Legierungsüberzug versehen werden. Das Stahlband 1 ist über die Stromzuführungsrollen 2 als Kathode geschaltet.The drawing schematically shows a system for the galvanic deposition of a zinc-nickel alloy coating on a steel strip 1. This steel strip 1 is to be provided with such an alloy coating on one side. The steel strip 1 is connected via the current supply rollers 2 as a cathode.

Bevor das Stahlband 1 durch die Elektrolyttanks läuft, wird es bei 20 auf der zu beschichtenden Seite einer Vorbehandlung unterzogen, indem es stromlos mit Elektrolyt besprüht wird, um auf dem Band eine zink-nickel-haltige dünne Primärschicht abzuscheiden.Before the steel strip 1 runs through the electrolyte tanks, it is subjected to a pretreatment at 20 on the side to be coated by being electrolessly sprayed with it in order to deposit a zinc-nickel-containing thin primary layer on the strip.

In einem ersten, mit einem geeigneten Elektrolyten gefüllten Tank 3 ist ein Anodenkorb 4 angeordnet, der mit Zinkanoden 5 gefüllt ist. Dieser Anodenkorb ist an eine Stromzuführung 6 angeschlossen. Mittels der elektrischen Schaltung 7, deren Aufbau ansich bekannt ist kann der Strom abhängig von der Auflagedicke, der Bandgeschwindigkeit, der Bandbreite und der gewünschten Zusammensetzung des Legierungsüberzuges gesteuert werden.An anode basket 4, which is filled with zinc anodes 5, is arranged in a first tank 3 filled with a suitable electrolyte. This anode basket is connected to a power supply 6. By means of the electrical circuit 7, the structure of which is known per se, the current can be controlled as a function of the coating thickness, the belt speed, the belt width and the desired composition of the alloy coating.

Es ist ferner ein zweites, ebenfalls mit Elektrolyt gefüllter Tank 8 vorgesehen, in dem ein Anodenkorb 9 angeordnet ist. Dieser Anodenkorb 9 ist mit Nickelanoden 10 gefüllt.There is also a second tank 8, also filled with electrolyte, in which an anode basket 9 is arranged. This anode basket 9 is filled with nickel anodes 10.

Die Stromzuführung 11 zu dem zweiten Anodenkorb 9 ist unabhängig von der ersten Stromzuführung 6. Über eine der Schaltung 7 entsprechende Schaltung 12 kann der Strom am Anodenkorb 9 unabhängig von dem Anodenkorb 4 geregelt werden.The current supply 11 to the second anode basket 9 is independent of the first current supply 6. The current at the anode basket 9 can be regulated independently of the anode basket 4 via a circuit 12 corresponding to the circuit 7.

Auf dem die Anlage von rechts nach links durchlaufenden Stahlband 1 wird im Tank 3 zunächst Zink aufgelöst. Im Tank 8 erfolgt dann die Auflösung von Nickel. Die Metallabscheidung erfolgt in beiden Tanks 3, 8 als Legierung. Durch die getrennte Stromregelung an den Anodenkörben 4 und 9 wird die Konzentration von Zink und Nickel im Elektrolyten beeinflußt und dadurch die Zusammensetzung der abgeschiedenen Legierung im gewünschten Verhältnis konstant gehalten. Der Elektrolyt ist in beiden Tanks 3, 8 der gleiche und wird den Tanks 3, 8 aus einem gemeinsamen Vorratsbehälter 13 zugeführt.Zinc is first dissolved in tank 3 on the steel belt 1 passing through the system from right to left. Nickel is then dissolved in tank 8. The metal is deposited in both tanks 3, 8 as an alloy. The separate current control on the anode baskets 4 and 9 influences the concentration of zinc and nickel in the electrolyte, thereby keeping the composition of the deposited alloy constant in the desired ratio. The electrolyte is the same in both tanks 3, 8 and is supplied to the tanks 3, 8 from a common storage container 13.

Gegebenenfalls wäre es auch denkbar, eine elektrisch isolierte Bauweise jedes Anodenkorbes 4 bzw. 9 nach Eingangs- und Ausgangstrum des Bandes 1 vorzusehen.If necessary, it would also be conceivable to provide an electrically insulated construction of each anode basket 4 or 9 according to the inlet and outlet strand of the strip 1.

Claims (4)

1. Method for galvanically depositing a zinc-nickel-alloy plating on a metal object, in particular on a steel strip, using soluble anodes which contain the alloy elements, characterized in that, prior to the galvanic depositing of the alloy plating, there occurs an intensive, currentless pretreatment of the metal object with the electrolyte at a relative flow speed of at least 2 meters per secound and a treatment time of at least 5 seconds.
2. The method according to claim 1, characterized in that the pretreatment occurs by guiding the metal object through an electrolyte bath.
3. The method according to claim 1, characterized in that the pretreatment is done by spraying the electrolyte onto the metal object.
4. The method according to one of the claim 1 to 3, by using soluble anodes which each contain only one alloy element, which anodes are connected to separate circuits, characterized in that the current is controlled separately for the anodes, which contain different alloy elements.
EP82102134A 1981-03-17 1982-03-16 Process for the galvanic deposit of a zinc-nickel-alloy layer on a metal object, in particular on steel strip Expired EP0061130B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102134T ATE11796T1 (en) 1981-03-17 1982-03-16 PROCESS FOR ELECTROPLATING A ZINC-NICKEL ALLOY COATING ON A METAL OBJECT, ESPECIALLY STEEL STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3110317 1981-03-17
DE3110317 1981-03-17

Publications (2)

Publication Number Publication Date
EP0061130A1 EP0061130A1 (en) 1982-09-29
EP0061130B1 true EP0061130B1 (en) 1985-02-13

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EP82102134A Expired EP0061130B1 (en) 1981-03-17 1982-03-16 Process for the galvanic deposit of a zinc-nickel-alloy layer on a metal object, in particular on steel strip

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EP (1) EP0061130B1 (en)
AT (1) ATE11796T1 (en)
DE (1) DE3262272D1 (en)
WO (1) WO1982003232A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006035233A1 (en) * 2006-07-26 2008-01-31 Mahle International Gmbh Galvanic surface coating of a component

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60228693A (en) * 1984-04-25 1985-11-13 Kawasaki Steel Corp Manufacture of steel plate plated with zn-ni alloy
US4834845A (en) * 1987-08-28 1989-05-30 Kawasaki Steel Corp. Preparation of Zn-Ni alloy plated steel strip
FR2623821B1 (en) * 1987-11-27 1990-04-20 Renault PROTECTIVE SURFACE LAYER WITH LOW COEFFICIENT OF FRICTION
US4822457A (en) * 1988-01-25 1989-04-18 Usx Corporation Method of eliminating a fern-like pattern during electroplating of metal strip
DE3816419C1 (en) * 1988-05-13 1989-04-06 Rasselstein Ag, 5450 Neuwied, De

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR654734A (en) * 1927-06-20 1929-04-10 Chromium plating process for castings
US2778787A (en) * 1954-03-15 1957-01-22 British Iron Steel Research Electrodeposition of iron zinc alloys
GB1041761A (en) * 1964-08-13 1966-09-07 Pyrene Co Ltd Improvements in the coating of metals
US4313802A (en) * 1979-02-15 1982-02-02 Sumitomo Metal Industries, Ltd. Method of plating steel strip with nickel-zinc alloy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006035233A1 (en) * 2006-07-26 2008-01-31 Mahle International Gmbh Galvanic surface coating of a component

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ATE11796T1 (en) 1985-02-15
WO1982003232A1 (en) 1982-09-30
EP0061130A1 (en) 1982-09-29
DE3262272D1 (en) 1985-03-28

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