EP2794963A1 - Coin blank - Google Patents

Coin blank

Info

Publication number
EP2794963A1
EP2794963A1 EP12742809.2A EP12742809A EP2794963A1 EP 2794963 A1 EP2794963 A1 EP 2794963A1 EP 12742809 A EP12742809 A EP 12742809A EP 2794963 A1 EP2794963 A1 EP 2794963A1
Authority
EP
European Patent Office
Prior art keywords
copper
cover layer
nickel
layer
coin
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
Application number
EP12742809.2A
Other languages
German (de)
French (fr)
Other versions
EP2794963B1 (en
Inventor
Thomas Bilas
Stephan Siegel
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.)
Saxonia Eurocoin GmbH
Original Assignee
Saxonia Eurocoin GmbH
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 Saxonia Eurocoin GmbH filed Critical Saxonia Eurocoin GmbH
Publication of EP2794963A1 publication Critical patent/EP2794963A1/en
Application granted granted Critical
Publication of EP2794963B1 publication Critical patent/EP2794963B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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.
  • a well-known example are the currently in circulation coins of 1-, 2- and 5-Euiocents, which have a core made of steel, which is electroplated copper.
  • the copper layer usually has a thickness of 20 ⁇ to greater than 30 ⁇ .
  • DE 41 20 291 also discloses a blank for a coin which has a two-layer or multi-layer galvanic coating of the steel core with nickel, copper and nickel as the outer layer, the coating thickness being 1% Ni, 4-7, based on the weight of the blank % Cu and 1 -1.5% Ni. This corresponds to a layer thickness of greater than 10 ⁇ the individual layers.
  • 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 forms a dull patina, 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.
  • 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.
  • FIG. 1 shows the cross-section through a coin blank made of steel according to the invention with a galvanic copper layer as cover layer with nickel doping
  • 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.
  • 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 pore-free with a galvanic copper layer (2) with the usual thicknesses in the range of 1 ⁇ to 30 ⁇ .
  • On this cover layer of copper (2) is applied a wafer-thin, from 0.5 ⁇ to 3 ⁇ thick layer of nickel, by a 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 ), causing both the permanent A
  • the nickel doping is at the surface of the copper 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
  • 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 to FIG l.
  • the galvanic cover layer has, for example, a layer thickness of 30 ⁇ , which is applied to the core (1) made of iron material.
  • the cover layer (2) contains a nickel dopant (3).
  • the nickel doping (3) has a concentration of about 2% by mass. The concentration decreases with increasing distance from the surface.

Abstract

Coins which consist of a steel core having an electrolytic covering layer composed of copper are internationally routine, e.g. the 1, 2 and 5 eurocent coins. Copper has the disadvantage that a matt patina is formed during use of the circulating coin, as a result of which gloss and the original colour are lost. It is an object of the invention to provide a coin blank which contains a steel core (1) having a covering layer (2) which is composed of copper/copper alloy and retains brightness and colour shade in long-term use of the coin minted therefrom. The covering layer (2) of the coin blank is, according to the invention doped with nickel (3), as a result of which copper-coloured brightness and constancy of colour of the minted circulating coins are ensured.

Description

Beschreibung  description
Münzrohling  coin blank
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-Euiocents, die einen Kern aus Stahl besitzen, der galvanisch verkupfert ist. Die Kupferschicht hat üblicherweise eine Dicke von 20μηι bis größer 30μηι. 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. A well-known example are the currently in circulation coins of 1-, 2- and 5-Euiocents, which have a core made of steel, which is electroplated copper. The copper layer usually has a thickness of 20μηι to greater than 30μηι.
Aus DE 29 32 229 sind auch Münzen aus Stahl bekannt, die galvanisch vernickelt sind und die einen dauerhaften typischen Nickelglanz aufweisen. Es ist dazu erforderlich, dass die Nickelschicht eine Dicke von größer/gleich ΙΟμπι aufweist. Bekannt ist aus DE 41 20 291 auch ein Rohling für eine Münze, der eine zwei- oder mehrschichtige galvanische Beschichtung des Stahlkerns mit Nickel, Kupfer und Nickel als äußere Schicht, wobei die Beschichtungsdicken bezogen auf das Gewicht des Rohlings 1% Ni, 4-7% Cu und 1 -1,5% Ni betragen sollen. Das entspricht einer Schichtdicken von jeweils größer 10 μπι der einzelnen Schichten. From DE 29 32 229 coins made of steel are also known, which are galvanically nickel-plated and which have a permanent typical nickel gloss. It is necessary for the nickel layer to have a thickness of greater than or equal to πμπι. DE 41 20 291 also discloses a blank for a coin which has a two-layer or multi-layer galvanic coating of the steel core with nickel, copper and nickel as the outer layer, the coating thickness being 1% Ni, 4-7, based on the weight of the blank % Cu and 1 -1.5% Ni. This corresponds to a layer thickness of greater than 10 μπι the individual layers.
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 „ 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 "
- 2 - - 2 -
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. However, copper layer has the disadvantage that in constant use of the coin in circulation forms a dull patina, 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 (DE 29 32 229, DE 41 20 291), sind zwar korrosionsstabiler und behalten ihren typischen Nickelglanz im Gebrauch als Umlaufmünze, sie beschränken sich aber auf die silberne Farbe des Nickels. Known coins which consist of a steel core and are galvanically nickel-plated (DE 29 32 229, DE 41 20 291) are indeed more corrosion-resistant and retain their typical nickel gloss in use as a circulation coin, but they are limited to the silver color of the nickel.
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 claim 1. Advantageous embodiments of the invention are the subject of the dependent claims. 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. In this case, the cover layer can be applied galvanically. Likewise, 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 same positive effects with regard to color constancy and gloss result in coins which are embossed from coin blanks whose core contains steel or precoated steel which is galvanically coated with a copper alloy such as CuZn or CuSn or also with a layer combination, for example of Cu / CuZn or Cu / CuSn, coated when the cover layer is doped with nickel according to the invention. The inventive Nickel doping gives no or only a minimally visually recognizable change in the color of the coin blanks compared to undoped coin blanks.
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 The invention is explained in more detail below with reference to two exemplary embodiments: FIG. 1 shows the cross-section through a coin blank made of steel according to the invention with a galvanic copper layer as cover layer with nickel doping
1 - Stahlkern 1 - steel core
2 - galvanische Deckschicht Kupfer  2 - galvanic cover copper
3 - Nickeldotierung in der Kupferschicht  3 - Nickel doping in the copper layer
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 1 Ομιτι bis von 30μπι porenfrei abgedeckt. Auf diese Deckschicht aus Kupfer (2) wird eine hauchdünne, von 0,5 μηι bis 3μη 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 A 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 pore-free with a galvanic copper layer (2) with the usual thicknesses in the range of 1 Ομιτι to 30μπι. On this cover layer of copper (2) is applied a wafer-thin, from 0.5 μηι to 3μη thick layer of nickel, by a 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 ), causing both the permanent A
- 4 - - 4 -
Kupferfarbe der Deckschicht als auch deren Korrosionsbeständigkeit gewährleistet ist. Die Nickeldotierung beträgt an der Oberfläche der Kupferschicht 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. Copper color of the top layer and their corrosion resistance is ensured. The nickel doping is at the surface of the copper 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 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 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
Γ - Stahlkern Γ - steel core
2 ' - galvanische Zwischenschicht Kupfer  2 '- galvanic interlayer copper
2" - galvanische Deckschicht Kupfer-Zink-Legierung (Messing) 2 "- galvanic top layer copper-zinc alloy (brass)
3 - Nickeldotierung in der Kupfer-Zink-Deckschicht 3 - Nickel doping in the copper-zinc coating layer
Fig. 3 zeigt den Konzentrationsverlauf der Nickeldotierung über den Querschnitt einer Münzronde mit einer galvanischen Deckschicht aus Kupfer gemäß Fig. l . Die galvanische Deckschicht hat beispielsweise eine Schichtdicke von 30μηι, 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. 3 shows the concentration profile of the nickel doping over the cross section of a Münzronde with a galvanic cover layer of copper according to FIG l. The galvanic cover layer has, for example, a layer thickness of 30μηι, 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

Patentansprüche claims
1) Münzrohling mit einem Kern aus einem Eisenwerkstoff, der mit einer Deckschicht aus1) Münzrohling with a core of a ferrous material, with a cover layer of
Kupfer oder aus einer Kupferlegierung versehen ist, dadurch gekennzeichnet, dass die Deckschicht (2) aus Kupfer oder aus einer Kupferlegierung eine Nickeldotierung (3) aufweist. Copper is provided or made of a copper alloy, characterized in that the cover layer (2) made of copper or of a copper alloy has a nickel doping (3).
2) Münzrohling nach Anspruch 1 , dadurch gekennzeichnet, 2) coin blank according to claim 1, characterized
dass an der Oberfläche der Deckschicht (2) die Nickeldotierung (3) kleiner/gleich 10 Masse- % bezogen auf die Masse der Deckschicht beträgt. in that the nickel doping (3) on the surface of the cover layer (2) is less than or equal to 10% by mass, based on the mass of the cover layer.
3) Münzrohling nach Anspruch 1 oder 2, dadurch gekennzeichnet, 3) coin blank according to claim 1 or 2, characterized
dass die Deckschicht (2") eine Kupfer-Zink-Legierung enthält, die eine Nickeldotierung (3) aufweist. in that the cover layer (2 ") contains a copper-zinc alloy which has a nickel doping (3).
4) Münzrohling nach Anspruch 1 oder 2, dadurch gekennzeichnet, 4) coin blank according to claim 1 or 2, characterized
dass die Deckschicht (2") eine Kupfer-Zinn-Legierung enthält, die eine Nickeldotierung (3) aufweist. in that the cover layer (2 ") contains a copper-tin alloy which has a nickel doping (3).
5) Münzrohling nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, 5) coin blank according to one of claims 1 to 4, characterized
dass über dem Kern (1) aus Eisenwerkstoff oder einem vorbeschichteten Eisenwerkstoff eine Schichtkombination (272") angeordnet ist, die mehrere Schichten aus Kupfer und/oder Kupferlegierungen enthält, und dass die Deckschicht (2") Nickeldotierung (3) aufweist. in that a layer combination (272 ") which contains a plurality of layers of copper and / or copper alloys is arranged above the core (1) made of iron material or a pre-coated iron material, and in that the cover layer (2 " ) has nickel doping (3).
6) Münzrohling nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, 6) coin blank according to one of claims 1 to 5, characterized
dass auf dem Kern (1) aus Eisenwerkstoff eine Schichtkombination (272") der Art Cu/CuZn oder Cu/CuSn oder CuZn/Cu, oder CuSn/Cu oder CuZn/CuSn oder CuSn/CuZn angeordnet ist und dass die Deckschicht (2") eine Nickeldotierung (3) aufweist. a layer combination (272 " ) of the type Cu / CuZn or Cu / CuSn or CuZn / Cu, or CuSn / Cu or CuZn / CuSn or CuSn / CuZn is arranged on the core (1) made of iron material and that the cover layer (2 ") ) has a nickel doping (3).
7) Verfahren zum Herstellen eines Münzrohlings mit einer dotierten Schicht, mit: 7) A method of making a coin blank having a doped layer, comprising:
Aufbringen einer Deckschicht (2) aus Kupfer oder einer Kupferlegierung auf einem Kern aus einem Eisenwerkstoff; und Einbringen einer Nickeldotierung (3) in Deckschicht (2). Applying a cover layer (2) of copper or a copper alloy on a core of a ferrous material; and Introduction of a nickel doping (3) in cover layer (2).
8) Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass das Einbringen der8) Method according to claim 7, characterized in that the introduction of the
Nickeldotierung (3) in die Deckschicht (2, 2") das Einbringen einer Nickelschicht auf die Deckschicht (2, 2") und eine anschließende thermische Behandlung des Münzrohlings umfasst. Nickel doping (3) in the cover layer (2, 2 " ), the introduction of a nickel layer on the cover layer (2, 2") and a subsequent thermal treatment of the coin blank comprises.
9) Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass das Einbringen einer9) Method according to claim 7 or 8, characterized in that the introduction of a
Nickeldotierung (3) das Aufbringen einer homogenen nickelhaltigen Schicht mit einer Dicke von kleiner/gleich 3μπι auf der Deckschicht umfasst. Nickel doping (3) comprises the application of a homogeneous nickel-containing layer with a thickness of less than or equal to 3μπι on the cover layer.
EP12742809.2A 2011-12-22 2012-07-31 Coins blank Active EP2794963B1 (en)

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 true EP2794963A1 (en) 2014-10-29
EP2794963B1 EP2794963B1 (en) 2016-03-09

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EP12742809.2A Active EP2794963B1 (en) 2011-12-22 2012-07-31 Coins blank

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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)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015095874A1 (en) * 2013-12-20 2015-06-25 Jarden Zinc Products, LLC 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)

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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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013091738A1 *

Also Published As

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DE102011121952A1 (en) 2013-06-27
ZA201404211B (en) 2015-11-25
CA2858875A1 (en) 2013-06-27
WO2013091738A1 (en) 2013-06-27
EP2794963B1 (en) 2016-03-09
CL2014001636A1 (en) 2015-01-23
RU2014124532A (en) 2016-02-10

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