[go: up one dir, main page]

WO1982003232A1 - Procede pour le depot galvanique d'une couche d'alliage sur un objet metallique notamment d'un alliage zinc-nickel sur une bande en acier - Google Patents

Procede pour le depot galvanique d'une couche d'alliage sur un objet metallique notamment d'un alliage zinc-nickel sur une bande en acier Download PDF

Info

Publication number
WO1982003232A1
WO1982003232A1 PCT/DE1982/000061 DE8200061W WO8203232A1 WO 1982003232 A1 WO1982003232 A1 WO 1982003232A1 DE 8200061 W DE8200061 W DE 8200061W WO 8203232 A1 WO8203232 A1 WO 8203232A1
Authority
WO
WIPO (PCT)
Prior art keywords
alloy
zinc
nickel
metal object
anodes
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.)
Ceased
Application number
PCT/DE1982/000061
Other languages
German (de)
English (en)
Inventor
Ag Rasselstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rasselstein AG
Original Assignee
Rasselstein AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rasselstein AG filed Critical Rasselstein AG
Publication of WO1982003232A1 publication Critical patent/WO1982003232A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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 an alloy coating on a metal object, in particular a zinc-nickel alloy coating on steel strip, using soluble anodes, each containing only one alloy element.
  • 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 processes lead to unsatisfactory results.
  • an alloy coating is electrodeposited on a metal object, in particular a zinc-nickel alloy coating on steel strip, it is also important that the alloy coating contains a predetermined constant percentage composition of the alloy 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 an alloy coating on a metal object, in particular a zinc-nickel alloy coating on steel strip of the type mentioned, which leads to alloy coatings with good corrosion resistance even in the deformed state, tiieiter should in simpler Control of the concentration of different alloying elements in the electrolyte and thus the deposition of an alloy coating with a desired constant percentage composition may be possible.
  • the galvanic deposition process is preceded by an intensive electroless pretreatment of the metal object such as the steel strip with the electrolyte, expediently at a flow velocity on the belt of at least 2m / sec. 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 electroless pretreatment with relative speed between the electrolyte bath and the strip deposits a thin primary layer containing zinc-nickel, so that the actual electrolytic zinc-nickel coating takes place on this primary layer.
  • 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, each containing different alloy elements, to separate power supplies and controlling the current at the anodes separately,
  • Anodes which contain the second alloy element, for example nickel, are arranged on another anode carrier 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 supply 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.
  • the process is expediently carried out in such a way that in each case several anodes of an alloy element, e.g. Zinc, arranged in a common anode basket and this to a separate one, from power supplies to anode baskets, the anodes of another alloy element, e.g. Nickel, included, separate power supplies connected.
  • an alloy element e.g. Zinc
  • the method according to the invention is not intended to be limited to the electrodeposition of a zinc-nickel alloy coating. If necessary, it can also be used to deposit lead-tin or copper-zinc alloys.
  • 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 on one side be provided with such an alloy coating.
  • the steel strip 1 is connected via the current supply rollers 2 as a cathode.
  • Electrolyte tank runs, it is subjected to a pretreatment at 20 on the side to be coated, by electrolessly spraying it with electrolyte in order to deposit a thin zinc-nickel-containing primary layer on the belt.
  • 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.
  • anode basket 9 is arranged in which an anode basket 9 is arranged.
  • This anode basket 9 is filled with nickel anodes 10.
  • the second anode basket 9 is independent of the first current supply 6.
  • the current on 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. in the
  • Tank 8 then dissolves nickel.
  • the metal deposition takes place 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 in both tanks 3, 8 the same and is fed to the tanks 3, 8 from a common reservoir 13.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

Lors du depot galvanique d'une couche d'alliage sur un objet metallique, notamment d'un depot d'un revetement zinc-nickel sur une bande en acier (1), on fait preceder le depot galvanique du revetement en alliage d'un traitement prealable intensif (20) sans courant pour deposer une couche primaire contenant du zinc et du nickel de maniere telle que le depot electrolytique proprement dit ait lieu sur cette couche. Pour que le revetement ait une composition constante de ses composantes on utilise des electrodes separees contenant un seul des elements de l'alliage (5) (10), que l'on branche sur des circuits de courant separes pour commander le courant separement pour les anodes ayant les elements de l'alliage distincts.
PCT/DE1982/000061 1981-03-17 1982-03-16 Procede pour le depot galvanique d'une couche d'alliage sur un objet metallique notamment d'un alliage zinc-nickel sur une bande en acier Ceased WO1982003232A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3110317810317 1981-03-17
DE3110317 1981-03-17

Publications (1)

Publication Number Publication Date
WO1982003232A1 true WO1982003232A1 (fr) 1982-09-30

Family

ID=6127531

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1982/000061 Ceased WO1982003232A1 (fr) 1981-03-17 1982-03-16 Procede pour le depot galvanique d'une couche d'alliage sur un objet metallique notamment d'un alliage zinc-nickel sur une bande en acier

Country Status (4)

Country Link
EP (1) EP0061130B1 (fr)
AT (1) ATE11796T1 (fr)
DE (1) DE3262272D1 (fr)
WO (1) WO1982003232A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162322A3 (en) * 1984-04-25 1986-05-28 Kawasaki Steel Corporation Production of zn-ni alloy plated steel strips

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834845A (en) * 1987-08-28 1989-05-30 Kawasaki Steel Corp. Preparation of Zn-Ni alloy plated steel strip
FR2623821B1 (fr) * 1987-11-27 1990-04-20 Renault Couche superficielle protectrice a faible coefficient de frottement
US4822457A (en) * 1988-01-25 1989-04-18 Usx Corporation Method of eliminating a fern-like pattern during electroplating of metal strip
DE3816419C1 (fr) * 1988-05-13 1989-04-06 Rasselstein Ag, 5450 Neuwied, De
DE102006035233A1 (de) * 2006-07-26 2008-01-31 Mahle International Gmbh Galvanische Oberflächenbeschichtung eines Bauteils

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR654734A (fr) * 1927-06-20 1929-04-10 Procédé de chromage des pièces de fonte
US2778787A (en) * 1954-03-15 1957-01-22 British Iron Steel Research Electrodeposition of iron zinc alloys
US3449222A (en) * 1964-08-13 1969-06-10 Hooker Chemical Corp Metal coating process
FR2449140A1 (fr) * 1979-02-15 1980-09-12 Sumitomo Metal Ind Procede de placage d'une bande d'acier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR654734A (fr) * 1927-06-20 1929-04-10 Procédé de chromage des pièces de fonte
US2778787A (en) * 1954-03-15 1957-01-22 British Iron Steel Research Electrodeposition of iron zinc alloys
US3449222A (en) * 1964-08-13 1969-06-10 Hooker Chemical Corp Metal coating process
FR2449140A1 (fr) * 1979-02-15 1980-09-12 Sumitomo Metal Ind Procede de placage d'une bande d'acier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162322A3 (en) * 1984-04-25 1986-05-28 Kawasaki Steel Corporation Production of zn-ni alloy plated steel strips

Also Published As

Publication number Publication date
DE3262272D1 (en) 1985-03-28
EP0061130A1 (fr) 1982-09-29
EP0061130B1 (fr) 1985-02-13
ATE11796T1 (de) 1985-02-15

Similar Documents

Publication Publication Date Title
DE3307748C2 (fr)
DE3116743A1 (de) "verfahren zum vorbehandeln eines nicht leitfaehigen substrats fuer nachfolgendes galvanisieren"
DE2648274A1 (de) Verfahren zum selektiven elektroplattieren eines bereiches einer oberflaeche
DE3879826T2 (de) Herstellung eines mit einer zn-ni-legierung plattierten stahlbleches.
DE2036387A1 (de) Verfahren zum Galvanisieren und Vorrichtung zur Durchfuhrung des Verfahrens
DE102022100738A1 (de) Galvanisierungsvorrichtung und Galvanisierungssystem
DE3123833C2 (de) Verfahren zur Steuerung der Zusammensetzung von elektrolytisch abgeschiedenen Nickel-Kobalt-Legierungen
DE2939190C2 (fr)
DE3011991C2 (de) Verfahren zur Elektroplattierung eines Stahlbandes mit einer glänzenden Zn-Ni-Legierung
EP0061130B1 (fr) Procédé de dépôt galvanique d'une couche d'alliage zinc-nickel sur un objet métallique, en particulier sur une bande en acier
DE2820872A1 (de) Einrichtung zur elektroerzeugung von kupferfolien
WO2003038158A2 (fr) Dispositif de galvanisation et systeme de galvanisation concus pour revetir des structures deja conductrices
DE2705158C2 (de) Verfahren zum Teilgalvanisieren
DE3209559A1 (de) Verfahren zum galvanischen abscheiden eines legierungsueberzuges auf einem metallgegenstand, insbesondere eines zink-nickel-legierungsueberzuges auf bandstahl
DE10234705B4 (de) Galvanisiereinrichtung und Galvanisiersystem zum Beschichten von bereits leitfähig ausgebildeten Strukturen
DE3124161A1 (de) "verfahren zum warm-metallisieren von metallgegenstaenden"
DE8520383U1 (de) Vorrichtung zur kontinuierlichen galvanischen Abscheidung von Metallen bei hoher Stromdichte in vertikalen Zellen
WO2021023779A1 (fr) Procédé et système de revêtement électrolytique d'une bande électriquement conductrice et/ou d'un matériau tissé au moyen d'une technologie d'impulsions
DE8414836U1 (de) Vorrichtung für die elektrolytische Behandlung metallischer Bänder
WO1995021952A1 (fr) Procede et dispositif de depot electrolytique d'un revetement superficiel de pieces
EP0699781A1 (fr) Procédé électrolytique de traitement en particulier de revêtement en continu d'un substrat
DE69107350T2 (de) Gerät für die elektrolytische Behandlung und Verfahren für die kontinuierliche Elektrolyse von Aluminiumprodukten.
DE2647108A1 (de) Verfahren und vorrichtung zur kontinuierlichen metallisierung von nichtmetallischen endlosfasern
DE2523115A1 (de) Verfahren und vorrichtung zum oertlichen galvanisieren von bandmaterial
DE69722582T2 (de) Verfahren und Vorrichtung zur sequentiellen Metallisierung von Polymerfilmen

Legal Events

Date Code Title Description
AK Designated states

Designated state(s): JP US