EP0410919A1 - Verfahren zur Elektroplattierung einer Metalloberfläche und Elektrolysezelle zur Durchführung des Verfahrens - Google Patents

Verfahren zur Elektroplattierung einer Metalloberfläche und Elektrolysezelle zur Durchführung des Verfahrens Download PDF

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Publication number
EP0410919A1
EP0410919A1 EP90470044A EP90470044A EP0410919A1 EP 0410919 A1 EP0410919 A1 EP 0410919A1 EP 90470044 A EP90470044 A EP 90470044A EP 90470044 A EP90470044 A EP 90470044A EP 0410919 A1 EP0410919 A1 EP 0410919A1
Authority
EP
European Patent Office
Prior art keywords
anode
cathode
coating
compartment
basket
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.)
Withdrawn
Application number
EP90470044A
Other languages
English (en)
French (fr)
Inventor
Jean-Claude Catonné
Anne-Marie Chausse
Jean-Claude Charbonnier
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Publication of EP0410919A1 publication Critical patent/EP0410919A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/06—Wires; Strips; Foils
    • C25D7/0614—Strips or foils
    • C25D7/065—Diaphragms
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/002—Cell separation, e.g. membranes, diaphragms
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • C25D17/12—Shape or form

Definitions

  • the invention relates to electroplating, in particular electrolytic coatings of iron-zinc and nickel-zinc on steel sheet.
  • the object of the invention is to obtain a stationary state of composition of both the anolyte and the catholyte, while keeping the essential geometric characteristics of the cell constant, in order to ensure the consistency of the composition of the coating of the product.
  • Another object of the invention is to allow rapid changes in the nature of the coating to be deposited.
  • the invention relates to an anode unit of an electrolysis cell for the coating in continuous of a metal surface, such as a steel sheet, the cathode of which consists of the metal surface to be coated, cell of the type comprising a cation exchange membrane delimiting an anode compartment and a cathode compartment, unit characterized in that '' it forms the anode compartment of the cell and consists of a housing comprising at least one anode basket, in that said membrane constitutes at least in part the face of the anode unit intended to be placed opposite the surface to be coating, said anode basket being made of an insoluble electroconductive material, and ensuring the electrical connection of the anode unit, means being provided so that said anode basket remains in permanent contact with at least one block of the metal or metals to be deposited on the cathode which dissolve in the electrolyte, and means also being provided to allow the introduction of these blocks into the anode basket.
  • the anode basket constitutes the inner wall of said housing.
  • compositions of the anolyte and catholyte and the current densities J AT i in each branch of the circuit in such a way that: r vs Mid being the faradaic deposition efficiency on the cathode of the element Mi, and R Mi being the migration efficiency of the element Mi through the cation exchange membrane.
  • the cells according to the invention comprise on the one hand a soluble anode ensuring the regeneration of the electrolyte according to a device known under the name of "anode basket", or “panode”, and on the other hand share a cation exchange membrane, which helps maintain the consistency of the composition of the deposit.
  • FIG. 1 represents the schematic diagram of an installation for coating metallic objects, such as sheets, by electroplating, of the type comprising two associated cells and allowing the deposition on the object to be coated of a mixed layer of iron and zinc in constant proportions.
  • the cells 1 and 1 ′ are placed in two chambers mounted in parallel in the electrical circuit of the electroplating installation.
  • the total current density in the circuit is noted J.
  • Cell 1 comprises an iron anode 2, and is supplied by a current of density J AT F e .
  • Cell 1 ′ comprises a zinc anode 2 ′ and is supplied by a current of density J AT F e .
  • the cathode of these two cells is common and consists of the part to be coated such as, for example, a steel sheet 3 in movement.
  • Each of these cells is provided with a cation exchange membrane 4a, 4′a, which divides the cell into two compartments, respectively anode 5a, 5′a, and cathode 6a, 6′a.
  • These cells are not necessarily identical to each other.
  • These cation exchange membranes (MEC) are of the same type (for example the membrane marketed under the name NAFION by DUPONT DE NEMOURS) and are characterized by the migration yields of iron and zinc R Fe and R Zn from the anode compartment 5a, 5′a to the cathode compartment 6a, 6′a of each cell.
  • the anode compartments 5a, 5′a are independent of each other, while the cathode compartments 6a, 6′a communicate: the catholytes of the two compartments therefore have the same composition.
  • the compositions of the anolytes and the catholyte are, in the general case, different. In accordance with the indications given in the Request for Certificate of Utility cited, these compositions are chosen in such a way that the composition of the catholyte remains constant.
  • This equilibrium condition makes it possible to ensure, for given operating conditions, the consistency of the compositions of the anolytes and of the catholyte which is necessary for obtaining a stable composition of the deposit of iron and zinc on the product to be coated.
  • Another condition necessary for the stability of the composition of the deposit on the cathode is the maintenance at a constant value of the distance between the cathode and the source of cations.
  • the anode-cathode distance must be kept constant by mechanical means as the anode is consumed.
  • a soluble anode cell equipped with an MEC it is the distance between the membrane and the cathode which governs the operation of the cell, and it is easy to keep it constant by construction.
  • This condition can be fulfilled by using as an anodic compartment only an "anodic basket” or “panode”, as shown in FIG. 2.
  • This anodic basket 7 consists of a container 8 made of an insoluble conductive material, such as titanium, platinum, zirconium, etc.
  • This container contains an anolyte supplied with electric current at a current density J AT i , and anode compartment shape 5 similar to that of one of the cells described above. It is separated from the cathode compartment 6 b by a cation exchange membrane 4 b .
  • a deposition element Mi which migrates through the membrane irreversibly, is ensured by the dissolution of at least one consumable block 9 of this element, playing the role of a soluble anode, deposited in the basket anodic and whose contact with the wall of the container 8 is ensured simply by gravity.
  • the container is coated with an insulating envelope for electricity 10.
  • the upper part of the basket is provided with an opening that can be opened 13, allowing the introduction, continuously or discontinuously, of the consumable blocks. 9.
  • a grid 14 made of a rigid material, which makes it possible to protect the membrane during the introduction of the consumable blocks 9.
  • a tilting bottom 15 allows, after emptying of the anolyte, to remove the blocks 9 not yet dissolved at the end of treatment.
  • the cathode compartment 6 it is constituted as in the general case, the moving part to be coated 3 being placed as a cathode.
  • the same anode basket can contain consumable blocks of different natures. If chemical shifts are to be avoided, we can, as we saw earlier, use several cells placed in electrical parallel, whose anode baskets each contain a different element.
  • the invention is not limited to the examples which have just been described and shown.
  • the element made of a conductive and insoluble material which is in contact with the block or blocks to be dissolved can be simply immersed in the anode compartment without constituting the inner wall thereof, and be formed by a simple partition or a receptacle.
  • the invention applies to the continuous electrolytic coating of a metallic product such as a steel sheet by a plurality of elements, for example by an iron-zinc or nickel-zinc alloy.

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  • 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)
  • Electrolytic Production Of Metals (AREA)
EP90470044A 1989-07-25 1990-07-16 Verfahren zur Elektroplattierung einer Metalloberfläche und Elektrolysezelle zur Durchführung des Verfahrens Withdrawn EP0410919A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8910117A FR2650304B1 (fr) 1989-07-25 1989-07-25 Procede de revetement electrolytique d'une surface metallique, et cellule d'electrolyse pour sa mise en oeuvre
FR8910117 1989-07-25

Publications (1)

Publication Number Publication Date
EP0410919A1 true EP0410919A1 (de) 1991-01-30

Family

ID=9384185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470044A Withdrawn EP0410919A1 (de) 1989-07-25 1990-07-16 Verfahren zur Elektroplattierung einer Metalloberfläche und Elektrolysezelle zur Durchführung des Verfahrens

Country Status (7)

Country Link
EP (1) EP0410919A1 (de)
JP (1) JPH0375395A (de)
KR (1) KR920002827A (de)
BR (1) BR9003582A (de)
CA (1) CA2021242A1 (de)
DD (1) DD295730A5 (de)
FR (1) FR2650304B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006807A3 (de) * 1998-07-30 2000-05-04 Hillebrand Walter Gmbh & Co Kg Alkalisches zink-nickelbad
FR2821627A1 (fr) * 2001-03-05 2002-09-06 Lorilleux Procede et dispositif d'elaboration par voie electrolytique d'un depot selectif epais de nickel sur une piece
DE19848467C5 (de) * 1998-10-21 2006-04-27 Walter Hillebrand Gmbh & Co. Kg Galvanotechnik Alkalisches Zink-Nickelbad
WO2015166165A1 (fr) * 2014-04-30 2015-11-05 Turbomeca Dispositif destine a la mise en oeuvre d'un traitement d'anodisation et traitement d'anodisation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5795965B2 (ja) * 2011-05-30 2015-10-14 株式会社荏原製作所 めっき装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2617509A3 (fr) * 1987-07-02 1989-01-06 Siderurgie Fse Inst Rech Procede de revetement electrolytique en continu, notamment de fer-zinc, sur une tole d'acier, utilisant une membrane echangeuse d'ions

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62199800A (ja) * 1986-02-27 1987-09-03 Kawasaki Steel Corp 電気めつきにおけるめつき用金属粒供給方法およびその装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2617509A3 (fr) * 1987-07-02 1989-01-06 Siderurgie Fse Inst Rech Procede de revetement electrolytique en continu, notamment de fer-zinc, sur une tole d'acier, utilisant une membrane echangeuse d'ions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 12, no. 56 (C-477)[2903], 19 février 1988; & JP-A-62 199 800 (KAWASAKI STEEL CORP.) 02-09-1987 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006807A3 (de) * 1998-07-30 2000-05-04 Hillebrand Walter Gmbh & Co Kg Alkalisches zink-nickelbad
US6602394B1 (en) 1998-07-30 2003-08-05 Walter Hillebrand Gmbh & Co. Galvanotechnik Alkali zinc nickel bath
EP1344850A1 (de) * 1998-07-30 2003-09-17 Walter Hillebrand GmbH & Co. Galvanotechnik Alkalisches Zink-Nickelbad
CZ298904B6 (cs) * 1998-07-30 2008-03-05 Walter Hillebrand Gmbh & Co. Galvanotechnik Alkalická zinko-niklová lázen
US7807035B2 (en) 1998-07-30 2010-10-05 Ewh Industrieanlagen Gmbh & Co. Kg Methods of plating zinc-containing coatings under alkaline conditions
US8486235B2 (en) 1998-07-30 2013-07-16 Ewh Industrieanlagen Gmbh & Co. Kg Alkaline zinc-nickel bath
DE19848467C5 (de) * 1998-10-21 2006-04-27 Walter Hillebrand Gmbh & Co. Kg Galvanotechnik Alkalisches Zink-Nickelbad
FR2821627A1 (fr) * 2001-03-05 2002-09-06 Lorilleux Procede et dispositif d'elaboration par voie electrolytique d'un depot selectif epais de nickel sur une piece
WO2015166165A1 (fr) * 2014-04-30 2015-11-05 Turbomeca Dispositif destine a la mise en oeuvre d'un traitement d'anodisation et traitement d'anodisation
FR3020642A1 (fr) * 2014-04-30 2015-11-06 Turbomeca Dispositif destine a la mise en oeuvre d'un traitement d'anodisation
US10329685B2 (en) 2014-04-30 2019-06-25 Safran Helicopter Engines Device intended for implementing an anodization treatment and anodization treatment

Also Published As

Publication number Publication date
DD295730A5 (de) 1991-11-07
KR920002827A (ko) 1992-02-28
BR9003582A (pt) 1991-08-27
FR2650304B1 (fr) 1991-10-04
FR2650304A1 (fr) 1991-02-01
CA2021242A1 (fr) 1991-01-26
JPH0375395A (ja) 1991-03-29

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