EP0065322B1 - Goldfarbener Münzwerkstoff - Google Patents

Goldfarbener Münzwerkstoff Download PDF

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Publication number
EP0065322B1
EP0065322B1 EP82200368A EP82200368A EP0065322B1 EP 0065322 B1 EP0065322 B1 EP 0065322B1 EP 82200368 A EP82200368 A EP 82200368A EP 82200368 A EP82200368 A EP 82200368A EP 0065322 B1 EP0065322 B1 EP 0065322B1
Authority
EP
European Patent Office
Prior art keywords
coins
copper
aluminum
tin
gold
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.)
Expired
Application number
EP82200368A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0065322A1 (de
Inventor
Bruno Dr. Prinz
Manfred B. Dr. Rockel
Günther Dr. Rudolph
Ulrich Dr. Heubner
Hugo Zoebe
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.)
Vereinigte Deutsche Metallwerke AG
Original Assignee
Vereinigte Deutsche Metallwerke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6130658&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0065322(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Vereinigte Deutsche Metallwerke AG filed Critical Vereinigte Deutsche Metallwerke AG
Priority to AT82200368T priority Critical patent/ATE10952T1/de
Publication of EP0065322A1 publication Critical patent/EP0065322A1/de
Application granted granted Critical
Publication of EP0065322B1 publication Critical patent/EP0065322B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/02—Alloys based on copper with tin as the next major constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12903—Cu-base component
    • Y10T428/1291—Next to Co-, Cu-, or Ni-base component

Definitions

  • the invention relates to the use of a copper-based alloy with 1 to 7% tin and 1 to 7% aluminum, but the sum of the percentages of aluminum and tin does not exceed 10%, residual copper including unavoidable, production-related impurities as a material for the production of Coins or the like, which must have a golden color and a high tarnish resistance.
  • the coin authorities are therefore considering switching to newer, higher value coins from smaller pieces and distinguishing them from the existing highest value coins of the system by a different coin color.
  • Gold shades are particularly suitable for this because they combine certain values and most of the coins in circulation - at least the higher-value ones - have silver shades.
  • Coin materials with gold-like colors are known and some have already been used. Almost without exception, these are copper-based alloys that e.g. are alloyed with 25% zinc, with 20% zinc and 1% nickel, with 5 to 6% aluminum and 2% nickel or with 2% aluminum and 6% nickel.
  • all of these materials have the disadvantage that they lose their originally brilliant appearance relatively quickly in use and assume a matt and more brownish shade. This disadvantage is accepted in the case of coins of low value. For higher-value coins, such a discoloration that arises soon after use is not acceptable. For this reason, silver-colored materials, preferably nickel or alloys with a relatively high nickel content, have been used for higher-value coins.
  • punched coin blanks were made from the copper-based alloy to be used according to the invention (sample 5: 6% Sn, 2% Al; sample 6: 5% Al, 3% Sn; sample 7: 2% Al, 3% Sn) with or without Embossing is first subjected to the following pretreatment: pickling, rinsing in water, treating with a smoothing agent, drying in rice grist without rinsing, if necessary, embossing without additional lubricant.
  • Atmospheres of different aggressiveness were used as test media, namely:
  • test duration was 20 d.
  • the samples were then removed and assessed individually and separately for each test medium visually according to a point system with the marks 1 to 5, 1 meaning very good tarnish resistance and 5 very poor tarnish resistance with a strongly tarnished surface.
  • samples 1 to 4 have an overall rating between 19 and 24, the sample 5 made of the copper-based alloy to be used according to the invention is significantly lower with a total value of 15. From the point of view of tarnish resistance, this is therefore len copper base alloys previously used as a coin material are clearly superior. This also applies to samples 6 and 7, which are somewhat worse in tarnish resistance, but are economically more interesting due to the reduced Sn content by half and enable other surface colors.
  • the gold shades were determined by determining color index numbers according to DIN 5033 and index numbers according to the color system DIN 6164 from the spectral reflectance.
  • the hue T, the saturation level S and the dark level D in the form of the color symbol (T: S: D) as a measure according to the color system DIN 6164 for the copper alloys examined are summarized in Table 2:
  • samples 5 and 7 have almost the same color saturation as the well-known coin alloy CuA16Ni2, but that the shade is closer to rose gold, which gives the impression of a warmer gold tone that is preferred for coins.
  • the sample 6 is more in the light yellow area, but in view of its good tarnish resistance it is still much better suited as a coin material than the comparison materials.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Adornments (AREA)
  • Detergent Compositions (AREA)
  • Gloves (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Seeds, Soups, And Other Foods (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Chemically Coating (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
EP82200368A 1981-04-23 1982-03-25 Goldfarbener Münzwerkstoff Expired EP0065322B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82200368T ATE10952T1 (de) 1981-04-23 1982-03-25 Goldfarbener muenzwerkstoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3116125A DE3116125C2 (de) 1981-04-23 1981-04-23 Verwendung einer Kupferlegierung als Werkstoff für goldfarbene Münzen
DE3116125 1981-04-23

Publications (2)

Publication Number Publication Date
EP0065322A1 EP0065322A1 (de) 1982-11-24
EP0065322B1 true EP0065322B1 (de) 1984-12-27

Family

ID=6130658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82200368A Expired EP0065322B1 (de) 1981-04-23 1982-03-25 Goldfarbener Münzwerkstoff

Country Status (11)

Country Link
US (1) US4436790A (no)
EP (1) EP0065322B1 (no)
JP (1) JPS57181350A (no)
KR (1) KR830010215A (no)
AT (1) ATE10952T1 (no)
CA (1) CA1209829A (no)
DE (2) DE3116125C2 (no)
DK (1) DK179382A (no)
ES (1) ES511622A0 (no)
FI (1) FI69873C (no)
NO (1) NO155398C (no)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8305610D0 (en) * 1983-03-01 1983-03-30 Imi Kynoch Ltd Alloy
CA1219708A (en) * 1984-05-01 1987-03-31 Michael J.H. Ruscoe Aureate coins, medallions and tokens
DE3428951A1 (de) * 1984-08-06 1986-02-13 Leybold-Heraeus GmbH, 5000 Köln Mit einer deckschicht aus gold oder einem goldhaltigen material ueberzogener dekorativer gebrauchsgegenstand und verfahren zu seiner herstellung
USRE35624E (en) * 1990-01-05 1997-10-07 Kiilunen; David D. Wires made of copper-based alloy compositions
CA2013639C (en) * 1990-04-02 1998-06-23 Mitsuhiro Yasuda Electroplated blank for coins, medallions and tokens
US5312696A (en) * 1991-09-16 1994-05-17 United Technologies Corporation Method for reducing fretting wear between contacting surfaces
US5472796A (en) * 1995-01-13 1995-12-05 Olin Corporation Copper alloy clad for coinage
US6089828A (en) * 1998-02-26 2000-07-18 United Technologies Corporation Coated article and method for inhibiting frictional wear between mating titanium alloy substrates in a gas turbine engine
JP4424810B2 (ja) * 2000-03-27 2010-03-03 株式会社小松製作所 焼結材料
US6656606B1 (en) 2000-08-17 2003-12-02 The Westaim Corporation Electroplated aluminum parts and process of production
US6737175B2 (en) * 2001-08-03 2004-05-18 Exxonmobil Research And Engineering Company Metal dusting resistant copper based alloy surfaces
SE525460C2 (sv) * 2002-02-28 2005-02-22 Sandvik Ab Användning av en kopparlegering i uppkolande miljöer
US7891898B2 (en) * 2005-01-28 2011-02-22 S.C. Johnson & Son, Inc. Cleaning pad for wet, damp or dry cleaning
AU2009202339C1 (en) 2008-06-13 2012-03-22 Monnaie Royale Canadienne/ Royal Canadian Mint Control of electromagnetic signals of coins by multi-ply plating technology

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR530585A (fr) * 1921-02-07 1921-12-26 Mitsubishi Zosen Kaisha Ltd Perfectionnements aux alliages
US1630999A (en) 1926-01-28 1927-05-31 American Brass Co Wrought-metal article
GB268654A (en) * 1926-04-15 1927-04-07 Metallbank & Metallurg Ges Ag Copper-aluminium-alloys
US1881257A (en) 1932-08-16 1932-10-04 American Brass Co Wrought metal article
US2133845A (en) 1936-03-30 1938-10-18 Chase Brass & Copper Co Corrosion resistant tubular article
US2231940A (en) 1939-12-28 1941-02-18 Nylander Charles Victor Alloy
DE1216547B (de) * 1955-08-08 1966-05-12 Ver Deutsche Metallwerke Ag Aluminiumhaltige Zinnbronzen
US4292377A (en) 1980-01-25 1981-09-29 The International Nickel Co., Inc. Gold colored laminated composite material having magnetic properties
US4330599A (en) 1980-06-09 1982-05-18 Olin Corporation Composite material

Also Published As

Publication number Publication date
DE3116125A1 (de) 1982-11-25
NO821238L (no) 1982-10-25
FI821220A0 (fi) 1982-04-06
ES8400495A1 (es) 1983-10-16
DE3261673D1 (en) 1985-02-07
JPS57181350A (en) 1982-11-08
FI821220L (fi) 1982-10-24
ATE10952T1 (de) 1985-01-15
ES511622A0 (es) 1983-10-16
FI69873B (fi) 1985-12-31
FI69873C (fi) 1986-05-26
EP0065322A1 (de) 1982-11-24
DE3116125C2 (de) 1983-02-10
CA1209829A (en) 1986-08-19
NO155398C (no) 1987-03-25
DK179382A (da) 1982-10-24
KR830010215A (ko) 1983-12-26
NO155398B (no) 1986-12-15
US4436790A (en) 1984-03-13

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