EP2794963B1 - Coins blank - Google Patents
Coins blank Download PDFInfo
- Publication number
- EP2794963B1 EP2794963B1 EP12742809.2A EP12742809A EP2794963B1 EP 2794963 B1 EP2794963 B1 EP 2794963B1 EP 12742809 A EP12742809 A EP 12742809A EP 2794963 B1 EP2794963 B1 EP 2794963B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- copper
- layer
- covering layer
- nickel
- nickel doping
- 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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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 78
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 44
- 239000010949 copper Substances 0.000 claims description 43
- 229910052759 nickel Inorganic materials 0.000 claims description 41
- 229910052802 copper Inorganic materials 0.000 claims description 37
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 229910016347 CuSn Inorganic materials 0.000 claims description 8
- 229910002535 CuZn Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical class [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 2
- 238000007669 thermal treatment Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 39
- 229910000831 Steel Inorganic materials 0.000 description 21
- 239000010959 steel Substances 0.000 description 21
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 241001295925 Gegenes Species 0.000 description 1
- 241001311547 Patina Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000010003 thermal finishing 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
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C21/00—Coins; Emergency money; Beer or gambling coins or tokens, or the like
-
- 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
- C25D3/38—Electroplating: Baths therefor from solutions of copper
-
- 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
- C25D3/58—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of copper
-
- 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
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
-
- 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
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/623—Porosity of the layers
-
- 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
- C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
Definitions
- the present invention relates to a coin blank having a core of a ferrous material, preferably of steel, with a cover layer of copper and / or of a copper alloy.
- Coin blanks or coin blanks and coins embossed therefrom whose core consists of steel and which are coated on the surface with a cover layer of a non-ferrous metal, are known and widely used.
- the galvanic coating of the steel blanks has generally prevailed for manufacturing and economic reasons.
- the coating of coin blanks or Münzronden steel with copper or copper alloy serves both the corrosion protection of the highly corrosion-prone steel core and the coloring of the nominal, for example, by galvanic cover layers of copper or a copper alloy, such as brass.
- Well-known examples are the currently in circulation coins of 1-, 2- and 5-Eurocents, which have a core made of steel, which is electroplated copper.
- the copper layer usually has a thickness of 20 ⁇ m to more than 30 ⁇ m.
- DE 41 20 291 also a blank for a coin which comprises a two- or multi-layer galvanic coating of the steel core with nickel, copper and nickel as the outer layer, the coating thicknesses being based on the weight of the blank 1% Ni, 4-7% Cu and 1-1, 5% Ni should be. This corresponds to a layer thickness of greater than 10 microns of each layer.
- circulating coins are those having a steel core with a copper-colored electroplated topcoat.
- both the special color of the coin is achieved as the corrosion protection of the steel core sought.
- copper layer has the disadvantage that in constant use of the coin in circulation a dull patina forms, which relatively quickly lost the original luster of the copper surface of the coin. It also changes the color seriously from the original copper red to an unsightly reddish brown.
- galvanic cover layers which relate to a copper alloy, such as CuZn or CuSn. These surfaces lose their luster and their original golden color.
- Well-known coins which consist of a steel core and are galvanically nickel-plated ( DE 29 32 229 . DE 41 20 291 Although they are more resistant to corrosion and keep their typical nickel gloss in use as a circulation coin, but they are limited to the silver color of the nickel.
- the object of the invention is to provide a coin blank with a core of an iron material, in particular of steel, which is provided with a cover layer of copper or of a copper alloy, said cover layer sufficiently long in the continuous use of the coin embossed therefrom the original color shade of the copper or the copper alloy and its gloss retains and thus has a high tarnish resistance.
- the invention further relates to an article having a surface layer of copper or a copper alloy and a nickel doping in the surface layer.
- a coin blank comprising a steel core and provided with a cover layer of copper or a copper alloy is surface-doped with a wafer-thin nickel layer.
- the cover layer can be applied galvanically.
- the doping with nickel can be carried out by electrochemical or physical application of a nickel layer. It has been found that both the intense color of the copper layer is retained by the nickel doping and the gloss of a circulating coin, which was coined from the coin blank according to the invention, is not lost in continuous use.
- the nickel-doped coin blotter according to the present invention enables the embossing of circulating coins having a steel core which is electroplated with copper and / or a copper alloy in a new quality of coins. These coins ensure a lasting gloss and color consistency of the respective cover layer made of copper, brass (CuZn) or bronze (CuSn) or color-analog copper alloys, such as aluminum bronze (CuAl).
- the solution according to the invention also does not exclude blanks for commemorative embossing, medals and similar special cases of a galvanic coating.
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)
- Adornments (AREA)
- Laminated Bodies (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
Die vorliegende Erfindung betrifft einen Münzrohling mit einem Kern aus einem Eisenwerkstoff, vorzugsweise aus Stahl, mit einer Deckschicht aus Kupfer und/oder aus einer Kupferlegierung.The present invention relates to a coin blank having a core of a ferrous material, preferably of steel, with a cover layer of copper and / or of a copper alloy.
Münzrohlinge bzw. Münzronden und daraus geprägte Münzen, deren Kern aus Stahl besteht und die oberflächlich mit einer Deckschicht aus einem NE-Metall beschichtet sind, sind bekannt und verbreitet angewandt. Neben dem älteren mechanischen Plattierverfahren hat sich insbesondere die galvanische Beschichtung der Stahlronden aus fertigungstechnischen und wirtschaftlichen Gründen allgemein durchgesetzt. Die Beschichtung von Münzrohlingen bzw. Münzronden aus Stahl mit Kupfer oder Kupferlegierung dient sowohl dem Korrosionsschutz des stark korrosionsanfälligen Stahlkernes als auch der Farbgebung der Nominale, beispielsweise durch galvanische Deckschichten aus Kupfer oder aus einer Kupferlegierung, beispielsweise Messing. Bekanntes Beispiel sind die derzeit im Umlauf befindlichen Münzen der 1-, 2- und 5-Eurocents, die einen Kern aus Stahl besitzen, der galvanisch verkupfert ist. Die Kupferschicht hat üblicherweise eine Dicke von 20µm bis größer 30µm.Coin blanks or coin blanks and coins embossed therefrom, whose core consists of steel and which are coated on the surface with a cover layer of a non-ferrous metal, are known and widely used. In addition to the older mechanical plating method, in particular the galvanic coating of the steel blanks has generally prevailed for manufacturing and economic reasons. The coating of coin blanks or Münzronden steel with copper or copper alloy serves both the corrosion protection of the highly corrosion-prone steel core and the coloring of the nominal, for example, by galvanic cover layers of copper or a copper alloy, such as brass. Well-known examples are the currently in circulation coins of 1-, 2- and 5-Eurocents, which have a core made of steel, which is electroplated copper. The copper layer usually has a thickness of 20 μm to more than 30 μm.
Aus
Bekannt ist aus
Allgemein bevorzugt werden als Umlaufmünzen solche mit Stahlkern mit einer kupferfarbenen galvanischen Deckbeschichtung. Damit wird sowohl die spezielle Farbgebung der Münze erreicht als auch der Korrosionsschutz des Stahlkerns angestrebt. Eine galvanische Kupferschicht hat jedoch den Nachteil, dass sich im ständigen Gebrauch der Münze im Umlauf eine matte Patina bildet, wodurch relativ schnell der ursprüngliche Glanz der kupfernen Münzoberfläche verloren geht. Es ändert sich damit auch gravierend die Farbe vom ursprünglichen Kupferrot in ein unansehnliches Rotbraun. Ähnlich verhalten sich galvanische Deckschichten, die eine Kupferlegierung, wie CuZn oder CuSn betreffen. Auch diese Oberflächen verlieren ihren Glanz und ihre ursprüngliche goldene Farbe.Generally preferred as circulating coins are those having a steel core with a copper-colored electroplated topcoat. Thus, both the special color of the coin is achieved as the corrosion protection of the steel core sought. A galvanic However, copper layer has the disadvantage that in constant use of the coin in circulation a dull patina forms, which relatively quickly lost the original luster of the copper surface of the coin. It also changes the color seriously from the original copper red to an unsightly reddish brown. The same applies to galvanic cover layers which relate to a copper alloy, such as CuZn or CuSn. These surfaces lose their luster and their original golden color.
Bekannte Münzen, die aus eine Stahlkern bestehen und galvanisch vernickelt sind (
Aufgabe der Erfindung ist es, einen Münzrohling mit einem Kern aus einem Eisenwerkstoff, insbesondere aus Stahl, bereitzustellen, der mit einer Deckschicht aus Kupfer oder aus einer Kupferlegierung versehen ist, wobei diese Deckschicht hinreichend lange im Dauergebrauch der daraus geprägten Umlaufmünze die ursprüngliche Farbnuance des Kupfers oder der Kupferlegierung und deren Glanz behält und die damit eine hohe Anlaufbeständigkeit besitzt.The object of the invention is to provide a coin blank with a core of an iron material, in particular of steel, which is provided with a cover layer of copper or of a copper alloy, said cover layer sufficiently long in the continuous use of the coin embossed therefrom the original color shade of the copper or the copper alloy and its gloss retains and thus has a high tarnish resistance.
Erfindungsgemäß wird die Aufgabe mit dem in Anspruch 1 genannten Merkmal gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Die Erfindung betrifft weiterhin einen Gegenstand mit einer Oberflächenschicht aus Kupfer oder einer Kupferlegierung und einer Nickeldotierung in der Oberflächenschicht. Ein Münzrohling, der einen Stahlkern umfasst und der mit einer Deckschicht aus Kupfer oder einer Kupferlegierung versehen ist, wird mit einer hauchdünnen Nickelschicht oberflächlich dotiert. Dabei kann die Deckschicht galvanisch aufgebracht werden. Ebenso kann die Dotierung mit Nickel durch elektrochemisches bzw. physikalisches Aufbringen einer Nickelschicht erfolgen. Es hat sich gezeigt, dass durch die Nickeldotierung sowohl die intensive Farbe der Kupferschicht erhalten bleibt als auch der Glanz einer Umlaufmünze, die aus dem erfindungsgemäßen Münzrohling geprägt wurde, im Dauergebrauch nicht verloren geht. Die gleichen positiven Effekte hinsichtlich Farbkonstanz und Glanz ergeben sich bei Münzen, die aus Münzrohlingen geprägt sind, deren Kern Stahl oder vorbeschichteten Stahl enthält, der galvanisch mit einer Kupferlegierung wie beispielsweise CuZn oder CuSn beschichtet ist oder auch mit einer Schichtkombination, beispielsweise aus Cu/CuZn oder Cu/CuSn, beschichtet ist wenn die Deckschicht erfindungsgemäß mit Nickel dotiert ist. Die erfindungsgemäße Nickeldotierung ergibt keine bzw. eine nur minimal visuell erkennbare Veränderung der Farbe der Münzronden gegenüber undotierten Münzronden.According to the invention the object is achieved with the feature mentioned in
Die erfindungsgemäße, oberflächlich mit Nickel dotierte Münzronde ermöglicht das Prägen von Umlaufmünzen, die einen Stahlkern besitzen, der galvanisch mit Kupfer und/oder einer Kupferlegierung beschichtet ist, in einer neuen Qualität von Münzen. Diese Münzen gewährleisten einen dauerhaften Glanz und Farbkonstanz der jeweiligen Deckschicht aus Kupfer, Messing (CuZn) oder Bronze (CuSn) oder farblich analogen Kupferlegierungen, wie beispielsweise Aluminium Bronze (CuAl).The nickel-doped coin blotter according to the present invention enables the embossing of circulating coins having a steel core which is electroplated with copper and / or a copper alloy in a new quality of coins. These coins ensure a lasting gloss and color consistency of the respective cover layer made of copper, brass (CuZn) or bronze (CuSn) or color-analog copper alloys, such as aluminum bronze (CuAl).
Die erfindungsgemäße Lösung schließt auch Rohlinge für Gedenkprägungen, Medaillen und ähnliche Sonderfälle einer galvanischen Beschichtung nicht aus. Ebenso sind Gegenstände, die eine Oberfläche aus Kupfer oder Kupferlegierung besitzen erfindungsgemäß oberflächlich mit Nickel dotierbar, um den ursprünglichen Glanz dauerhaft zu fixieren, wo eine Patinierung durch Alterung der Kupferoberfläche bzw. der Kupferlegierung nicht erwünscht ist, z. B. bei Beschlägen, Griffen, Armaturen etc.The solution according to the invention also does not exclude blanks for commemorative embossing, medals and similar special cases of a galvanic coating. Likewise, articles which have a surface of copper or copper alloy according to the invention dopable superficially with nickel to permanently fix the original gloss, where a patination by aging of the copper surface or the copper alloy is not desirable, for. As for fittings, handles, fittings, etc.
Die Erfindung wird nachstehend an zwei Ausführungsbeispielen näher erläutert:
-
Fig. 1 zeigt den Querschnitt durch einen erfindungsgemäßen Münzrohling aus Stahl mit einer galvanischen Kupferschicht als Deckschicht mit Nickeldotierung- 1 - Stahlkern
- 2 - galvanische Deckschicht Kupfer
- 3 - Nickeldotierung in der Kupferschicht
Der Münzrohling umfasst einen Kern (1) aus einem Eisenwerkstoff, beispielsweise einem niedriglegierten Stahl, wie beispielsweise DC04 Stahl nach der Europäischen Norm. Dieser ist mit einer galvanischen Kupferschicht (2) mit der üblichen Dicken im Bereich von 10µm bis von 30µm porenfrei abgedeckt. Auf diese Deckschicht aus Kupfer (2) wird eine hauchdünne, von 0,5µm bis 3µm dicke, Schicht aus Nickel aufgebracht, die durch eine thermische Abschlussbehandlung des Münzrohlings in einer Schutzatmosphäre in Form einer Dotierung (3) in die Oberfläche der Deckschicht (2) eindringt, wodurch sowohl die dauerhafte Kupferfarbe der Deckschicht als auch deren Korrosionsbeständigkeit gewährleistet ist. Die Nickeldotierung beträgt an der Oberfläche derKupferschicht 1 bis 10 Masse-%, beispielsweise 2 Masse-% bezogen auf Kupfer im Oberflächenbereich und verläuft mit degressivem Konzentrationsgefälle gegen Null innerhalb der Kupferschicht. Wenn die Konzentration von Nickel an der Oberfläche größer als 10 Masse-% ist, ändert sich die Farbe des Münzrohlings. Wenn die Konzentration von Nickel niedriger als 1 Masse-% ist, verschlechtert sich die Anlaufbeständigkeit des Münzrohlings. -
Fig. 2 zeigt den Querschnitt durch eine erfindungsgemäße Münzronde aus Stahl mit einer galvanischen Schichtkombination aus Kupfer als Zwischenschicht und Kupfer-Zink (Messing) als Deckschicht mit Nickeldotierung- 1' - Stahlkern
- 2' - galvanische Zwischenschicht Kupfer
- 2" - galvanische Deckschicht Kupfer-Zink-Legierung (Messing)
- 3 - Nickeldotierung in der Kupfer-Zink-Deckschicht
-
Fig. 3 zeigt den Konzentrationsverlauf der Nickeldotierung über den Querschnitt einer Münzronde mit einer galvanischen Deckschicht aus Kupfer gemäßFig.1 . Die galvanische Deckschicht hat beispielsweise eine Schichtdicke von 30µm, die auf dem Kern (1) aus Eisenwerkstoff aufgebracht ist. Die Deckschicht (2) enthält eine Nickeldotierung (3). An der Oberfläche des Münzrohlings weist die Nickeldotierung (3) eine Konzentration von etwa 2 Masse-% auf. Die Konzentration nimmt mit zunehmendem Abstand von der Oberfläche ab.
-
Fig. 1 shows the cross section through a coin blank according to the invention made of steel with a galvanic copper layer as a cover layer with nickel doping- 1 - steel core
- 2 - galvanic cover copper
- 3 - Nickel doping in the copper layer
The coin blank comprises a core (1) made of a ferrous material, for example a low-alloy steel, such as, for example, DC04 steel according to the European standard. This is covered with a galvanic copper layer (2) with the usual thicknesses in the range of 10 .mu.m to 30 .mu.m pore-free. On this cover layer of copper (2), a wafer-thin, from 0.5 .mu.m to 3 .mu.m thick layer of nickel is applied, which by thermal finishing treatment of the coin blank in a protective atmosphere in the form of a dopant (3) in the surface of the cover layer (2). penetrates, causing both the permanent Copper color of the top layer and their corrosion resistance is ensured. The nickel doping is at the surface of thecopper layer 1 to 10 mass%, for example, 2% by mass based on copper in the surface region and runs with degressive concentration gradient to zero within the copper layer. If the concentration of nickel on the surface is larger than 10 mass%, the color of the coin blank changes. When the concentration of nickel is lower than 1 mass%, the tarnish resistance of the coin blank deteriorates. -
Fig. 2 shows the cross section through a Münzronde invention made of steel with a galvanic layer combination of copper as an intermediate layer and copper-zinc (brass) as a cover layer with nickel doping- 1 '- steel core
- 2 '- galvanic interlayer copper
- 2 "- galvanic top layer copper-zinc alloy (brass)
- 3 - Nickel doping in the copper-zinc coating layer
-
Fig. 3 shows the concentration profile of the nickel doping over the cross section of a Münzronde with a galvanic cover layer of copper according toFig.1 , The galvanic cover layer has, for example, a layer thickness of 30 .mu.m, which is applied to the core (1) made of iron material. The cover layer (2) contains a nickel dopant (3). On the surface of the coin blank, the nickel doping (3) has a concentration of about 2% by mass. The concentration decreases with increasing distance from the surface.
Claims (8)
- A coin blank with a core of an iron material, which is provided with a copper or copper alloy covering layer,
wherein the copper or copper alloy covering layer (2) comprises on its surface a nickel doping (3); and
the concentration of the nickel doping within the copper layer decreases with increasing distance from the surface of the covering layer. - The coin blank according to claim 1, wherein at the surface of the covering layer (2) the nickel doping (3) is less or equal to 10 percent by mass with respect to the mass of the covering layer.
- The coin blank according to claim 1 or 2, characterized in
that the covering layer (2") comprises a copper-zinc-alloy, which comprises a nickel doping (3). - The coin blank according to claim 1 or 2, characterized in
that the covering layer (2") comprises a copper-tin-alloy, which comprises a nickel doping (3). - The coin blank according to one of claims 1 to 4, characterized in
that above the core (1) of iron material or a pre-coated iron material a layer combination (2'/2") is arranged, which comprises a plurality of layers of copper and/or copper alloys, and that the covering layer (2") comprises a nickel doping (3). - The coin blank according to one of claims 1 to 5, characterized in
that on the core (1) of iron material a layer combination (2'/2") of the type of Cu/CuZn or Cu/CuSn or CuZn/Cu or CuSn/Cu or CuZn/CuSn or CuSn/CuZn is arranged and that the covering layer (2") comprises a nickel doping (3). - A method for manufacturing a coin blank comprising a doped layer, comprising:depositing a copper or copper alloy covering layer (2) on a core of an iron material; andintroducing a nickel doping (3) into the covering layer (2), whereinintroducing the nickel doping (3) into the covering layer (2, 2") comprises depositing a homogeneous nickel-containing layer having a thickness of less or equal to 3 µm on the covering layer (2, 2") and a subsequent thermal treatment of the coin blank.
- The method according to claim 7, wherein the concentration of the nickel doping within the copper layer decreases with increasing distance from the surface of the covering layer.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011121952A DE102011121952A1 (en) | 2011-12-22 | 2011-12-22 | Galvanically coated coin blank |
PCT/EP2012/003261 WO2013091738A1 (en) | 2011-12-22 | 2012-07-31 | Coin blank |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2794963A1 EP2794963A1 (en) | 2014-10-29 |
EP2794963B1 true EP2794963B1 (en) | 2016-03-09 |
Family
ID=46603883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12742809.2A Active EP2794963B1 (en) | 2011-12-22 | 2012-07-31 | Coins blank |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2794963B1 (en) |
CA (1) | CA2858875A1 (en) |
CL (1) | CL2014001636A1 (en) |
DE (1) | DE102011121952A1 (en) |
RU (1) | RU2014124532A (en) |
WO (1) | WO2013091738A1 (en) |
ZA (1) | ZA201404211B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102149384B1 (en) * | 2013-12-20 | 2020-08-28 | 아르타즌 엘엘씨 | Nickel plated zinc alloys for coinage |
CN107299369B (en) * | 2016-04-15 | 2019-08-20 | 南京造币有限公司 | A kind of surface cladding cupro-nickel coin class product and its manufacturing method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1101363A (en) | 1978-10-31 | 1981-05-19 | Michael J.H. Ruscoe | Process for the production of coin blanks |
US4292377A (en) * | 1980-01-25 | 1981-09-29 | The International Nickel Co., Inc. | Gold colored laminated composite material having magnetic properties |
DE3940244A1 (en) * | 1989-12-05 | 1991-06-06 | Ver Deutsche Nickel Werke Ag V | Plated composite material for coinage use - has base roll plated followed by thin electroplating layer |
CA2019568C (en) | 1990-06-21 | 1998-11-24 | Hieu C. Truong | Coins coated with nickel, copper and nickel and process for making such coins |
US20060286400A1 (en) * | 2005-06-17 | 2006-12-21 | Jarden Zinc Products, Inc. | Substrate with alloy finish and method of making |
-
2011
- 2011-12-22 DE DE102011121952A patent/DE102011121952A1/en not_active Ceased
-
2012
- 2012-07-31 RU RU2014124532A patent/RU2014124532A/en not_active Application Discontinuation
- 2012-07-31 EP EP12742809.2A patent/EP2794963B1/en active Active
- 2012-07-31 CA CA2858875A patent/CA2858875A1/en not_active Abandoned
- 2012-07-31 WO PCT/EP2012/003261 patent/WO2013091738A1/en active Application Filing
-
2014
- 2014-06-09 ZA ZA2014/04211A patent/ZA201404211B/en unknown
- 2014-06-19 CL CL2014001636A patent/CL2014001636A1/en unknown
Also Published As
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ZA201404211B (en) | 2015-11-25 |
RU2014124532A (en) | 2016-02-10 |
WO2013091738A1 (en) | 2013-06-27 |
DE102011121952A1 (en) | 2013-06-27 |
EP2794963A1 (en) | 2014-10-29 |
CL2014001636A1 (en) | 2015-01-23 |
CA2858875A1 (en) | 2013-06-27 |
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