EP0061130A1 - Procédé de dépôt galvanique d'une couche d'alliage zinc-nickel sur un objet métallique, en particulier sur une bande en acier - Google Patents
Procédé de dépôt galvanique d'une couche d'alliage zinc-nickel sur un objet métallique, en particulier sur une bande en acier Download PDFInfo
- Publication number
- EP0061130A1 EP0061130A1 EP82102134A EP82102134A EP0061130A1 EP 0061130 A1 EP0061130 A1 EP 0061130A1 EP 82102134 A EP82102134 A EP 82102134A EP 82102134 A EP82102134 A EP 82102134A EP 0061130 A1 EP0061130 A1 EP 0061130A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- nickel
- zinc
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 16
- 239000010959 steel Substances 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 title claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 16
- 229910000990 Ni alloy Inorganic materials 0.000 title claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 38
- 239000000956 alloy Substances 0.000 claims abstract description 38
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003792 electrolyte Substances 0.000 claims description 21
- 230000008021 deposition Effects 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 24
- 239000000203 mixture Substances 0.000 abstract description 16
- 229910052759 nickel Inorganic materials 0.000 abstract description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052725 zinc Inorganic materials 0.000 abstract description 10
- 239000011701 zinc Substances 0.000 abstract description 10
- 238000000151 deposition Methods 0.000 abstract description 7
- 238000009713 electroplating Methods 0.000 abstract 3
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- 238000005137 deposition process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical group [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
Images
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 electrodeposition 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. Furthermore, it should be possible in a simple manner to control the concentration of the different alloy elements in the electrolyte and thus to deposit an alloy coating with a desired constant percentage composition.
- the galvanic deposition process is preceded by 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 at a high relative speed between the electrolytic bath and the strip deposits a thin zinc-nickel-containing primary layer, 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 containing different alloy elements to separate power supplies and controlling the current at the anodes separately.
- 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.
- the process is expediently carried out in such a way that 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 supply connects.
- an alloy element e.g. Zinc
- another alloy element e.g. Nickel
- 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 alloy.
- 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 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 the same in both tanks 3, 8 and is supplied to 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 entrance and exit strand of the strip 1.
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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT82102134T ATE11796T1 (de) | 1981-03-17 | 1982-03-16 | Verfahren zum galvanischen abscheiden eines zink- nickel-legierungsueberzuges auf einem metallgegenstand, insbesondere auf bandstahl. |
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 true EP0061130A1 (fr) | 1982-09-29 |
| EP0061130B1 EP0061130B1 (fr) | 1985-02-13 |
Family
ID=6127531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82102134A Expired EP0061130B1 (fr) | 1981-03-17 | 1982-03-16 | Procédé de dépôt galvanique d'une couche d'alliage zinc-nickel sur un objet métallique, en particulier 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3816419C1 (fr) * | 1988-05-13 | 1989-04-06 | Rasselstein Ag, 5450 Neuwied, De | |
| FR2623821A1 (fr) * | 1987-11-27 | 1989-06-02 | Renault | Couche superficielle protectrice a faible coefficient de frottement |
| WO1989006712A1 (fr) * | 1988-01-25 | 1989-07-27 | Usx Engineers And Consultants, Inc. | Procede d'elimination d'un dessin en forme de fougere pendant le revetement electrolytique d'une bande metallique |
| AU588511B1 (en) * | 1987-08-28 | 1989-09-14 | Kawasaki Steel Corporation | Preparation of zn-ni alloy plated steel strip |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60228693A (ja) * | 1984-04-25 | 1985-11-13 | Kawasaki Steel Corp | Ｚｎ−Ｎｉ合金めつき鋼板の製造方法 |
| DE102006035233A1 (de) * | 2006-07-26 | 2008-01-31 | Mahle International Gmbh | Galvanische Oberflächenbeschichtung eines Bauteils |
Citations (4)
| 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 |
-
1982
- 1982-03-16 AT AT82102134T patent/ATE11796T1/de not_active IP Right Cessation
- 1982-03-16 DE DE8282102134T patent/DE3262272D1/de not_active Expired
- 1982-03-16 EP EP82102134A patent/EP0061130B1/fr not_active Expired
- 1982-03-16 WO PCT/DE1982/000061 patent/WO1982003232A1/fr not_active Ceased
Patent Citations (4)
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU588511B1 (en) * | 1987-08-28 | 1989-09-14 | Kawasaki Steel Corporation | Preparation of zn-ni alloy plated steel strip |
| FR2623821A1 (fr) * | 1987-11-27 | 1989-06-02 | Renault | Couche superficielle protectrice a faible coefficient de frottement |
| WO1989006712A1 (fr) * | 1988-01-25 | 1989-07-27 | Usx Engineers And Consultants, Inc. | Procede d'elimination d'un dessin en forme de fougere pendant le revetement electrolytique d'une bande metallique |
| DE3816419C1 (fr) * | 1988-05-13 | 1989-04-06 | Rasselstein Ag, 5450 Neuwied, De |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0061130B1 (fr) | 1985-02-13 |
| WO1982003232A1 (fr) | 1982-09-30 |
| ATE11796T1 (de) | 1985-02-15 |
| DE3262272D1 (en) | 1985-03-28 |
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