IT8982007A1 - SILVER ALLOY RESISTANT TO OXIDATION. - Google Patents
SILVER ALLOY RESISTANT TO OXIDATION. Download PDFInfo
- Publication number
- IT8982007A1 IT8982007A1 IT1989A82007A IT8200789A IT8982007A1 IT 8982007 A1 IT8982007 A1 IT 8982007A1 IT 1989A82007 A IT1989A82007 A IT 1989A82007A IT 8200789 A IT8200789 A IT 8200789A IT 8982007 A1 IT8982007 A1 IT 8982007A1
- Authority
- IT
- Italy
- Prior art keywords
- metal
- silver
- alloy according
- alloy
- oxidation
- Prior art date
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- 229910001316 Ag alloy Inorganic materials 0.000 title description 7
- 230000003647 oxidation Effects 0.000 title description 7
- 238000007254 oxidation reaction Methods 0.000 title description 7
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 11
- 239000004332 silver Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 239000010931 gold Substances 0.000 claims description 8
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 5
- 150000002739 metals Chemical class 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052738 indium Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052703 rhodium Inorganic materials 0.000 claims description 4
- 239000010948 rhodium Substances 0.000 claims description 4
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 3
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims 4
- 229910052725 zinc Inorganic materials 0.000 claims 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 2
- 229910052750 molybdenum Inorganic materials 0.000 claims 2
- 239000011733 molybdenum Substances 0.000 claims 2
- 239000011135 tin Substances 0.000 claims 2
- 229910052718 tin Inorganic materials 0.000 claims 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims 1
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- AOIFZSXPSAQABB-UHFFFAOYSA-N [In].[Zn].[In] Chemical compound [In].[Zn].[In] AOIFZSXPSAQABB-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000035618 desquamation Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- LFAGQMCIGQNPJG-UHFFFAOYSA-N silver cyanide Chemical compound [Ag+].N#[C-] LFAGQMCIGQNPJG-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Electroplating And Plating Baths Therefor (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Contacts (AREA)
Description
Descrizione dell'invenzione industriale dal titolo "lega di argento resistente all ?ssidazione" Description of the industrial invention entitled "oxidation resistant silver alloy"
R I A S S U N T 0 R I A S S U N T 0
ila presente invenzione si riferisce alla composi-|zione di una lega metallica su base argento , con titolo di .argento $00-925 millesimi, ottenibile per fusione The present invention relates to the composition of a metal alloy on a silver basis, with a silver content of $ 00-925 thousandths, obtainable by fusion
DESCRIZIONE DELL?' INVENZIONE DESCRIPTION OF THE? INVENTION
dalla letteratura tecnica, da diversi brevetti internazionali, sono note da molto tempo leghe metalliche su base argento (GERMAN PATENT N. 1094468 - BRITR SH PATERT R. 1284484 - USA PATTO n. 1896410 - JAPAR KOKAI TOKYO KOHO IP R. 64110807 - GERMAN PATERT N. 492779 - URS PATENT N. 425958 - JAPAR KOKAI TOKKYO ,JP N.7325620 - GERMAN PATERT N. 2046876 - richiesta /brevetto italiano n. 82006 del 22.08.89 ? rivista scientifica AKAD. GORND = HUTN KRA^W POLONIA 1987 -RIVISTA SCIENTIFICA Z. ELEKTROCHEMIE 37 , 593 - 8 : (PISCHBECK) . - - -Tutte le leghe su base argento contemplate nei suecitati brevetti e riviste scientifiche, sono contrad distinte da un insoddisfaeente aspetto estetico, co lore non argenteo, struttura a grana grossolana, desquamazioni e "bolle dovute ad inclusione di gas in fase di fusione, infine una scarsa resistenza allE ossidazione , contenuto di cadmio notoriamente tossico. A queste condizioni si rende indispensabile una argentatura in bagno galvanico di argento al cianuro. Compito della presente invenzione ? la composizione di una lega metallica su base argento che supera le difficolt? ed Imperfezioni accusate dalle leghe di argento contemplate nei succitati brevetti e pubblicazioni scientifiche tanto che si presenta con un ottimo aspetto estetico ed un'ottima resistenza alla ossidazione. Tutto questo viene risolto ?con una lega metallica caratterizzata dall 'impiego Idei seguenti metalli ed ossido metallico: rame,zincc dindio, rodio, oro, ferro, ossido di molibdeno, la percentuale dell 'argento pu? andare da 80 ? ?$ fino a 92?$, inoltre Au da 0,0001 fino a 0_,01$, Cu da 3 fino a 5$, ossido di molibdeno da 0,02 fino a 0,6$, ;?e minore o uguale a 0, 1$ Eh ndnore o uguale a 0,0009$ Zn da 2 fino a 15$, In , da 0,005 fino a 0,03$ ed Sn da 0,005 fino a 0,03$. L'invenzione in ogget-/bo si basa essenzialmente nell'inpiego di percentua-Ili di metalli perfettamente equilibrate. Grazie a questo processo viene conferito alla lega di argento una eccezionale resistenza alia ossidazione e?L un ottimo aspetto estetico, le leghe ottenute secondo i seguenti esenti: H?1 e n?2, hanno dopo una normale pulitura e lucidatura, un "bel colore M anco tanto da rendere inutile la usuale argentatura senz con ci? vincolare i diritti del brevetto in ogget-!to. La durezza delle leghe succitate ? dell'ordine Idi 150 HV, ed ? unita ad una .ottima malleaM lit?. from the technical literature, from various international patents, metal alloys on a silver basis have been known for a long time (GERMAN PATENT N. 1094468 - BRITR SH PATERT R. 1284484 - USA PACT n. 1896410 - JAPAR KOKAI TOKYO KOHO IP R. 64110807 - GERMAN PATERT N. 492779 - URS PATENT N. 425958 - JAPAR KOKAI TOKKYO, JP N.7325620 - GERMAN PATERT N. 2046876 - Italian application / patent n.82006 dated 08.22.89? Scientific journal AKAD. GORND = HUTN KRA ^ W POLAND 1987 - SCIENTIFIC MAGAZINE Z. ELEKTROCHEMIE 37, 593 - 8: (PISCHBECK). - - -All the silver-based alloys contemplated in the aforementioned patents and scientific journals, are distinguished by an unsatisfactory aesthetic appearance, non-silvery color, coarse grain structure , desquamation and "bubbles due to the inclusion of gas in the melting phase, and finally a poor resistance to oxidation, a notoriously toxic cadmium content. Under these conditions, a silver plating in a cyanide silver galvanic bath is essential. . Task of the present invention? the composition of a metal alloy on a silver base that overcomes the difficulties? and Imperfections accused by the silver alloys contemplated in the aforementioned patents and scientific publications, so much so that it has an excellent aesthetic appearance and excellent resistance to oxidation. All this is solved with a metal alloy characterized by the use of the following metals and metal oxide: copper, zinc diindium, rhodium, gold, iron, molybdenum oxide, the percentage of silver pu? go from 80? ? $ up to 92? $, in addition Au from 0.0001 to 0.01 $, Cu from 3 to $ 5, molybdenum oxide from 0.02 to $ 0.6,;? is less than or equal to 0, 1 $ Eh ndnore or equal to 0.0009 $ Zn from 2 to 15 $, In, from 0.005 to 0.03 $ and Sn from 0.005 to 0.03 $. The present invention is essentially based on the use of perfectly balanced percentages of metals. Thanks to this process, the silver alloy is given an exceptional resistance to oxidation and an excellent aesthetic appearance, the alloys obtained according to the following exemptions: H? 1 and n? 2, after normal cleaning and polishing, have a "beautiful color" But so much so as to make the usual silvering useless without binding the rights of the patent in question.
1Queste due ultime caratteristiche sono essenziali nel settore decorativo ed oggettistico delle argenterie. Il rame in bassa percentuale viene aggiunto alla lega di argento per migli4rame le caratteri-|etiche fisico-chimiche e la duttilit?, mentre rimane inalterato la resistenza alla ossidazione, la 4lega di argento della presente invenzione non 1These last two characteristics are essential in the decorative and objects sector of silverware. The low percentage copper is added to the silver alloy to improve the physical-chemical characteristics and the ductility, while the resistance to oxidation remains unaltered, the silver alloy of the present invention does not
;opaca dopo una normale lucidatura, in quanto una !forte brillantezza viene conferita dalla presenza ; opaque after normal polishing, as a strong shine is given by the presence
tIdi oro ed indio. tIdi gold and indium.
;Esempio nr.1 ; Example nr. 1
Argento metallo 80$ Silver metal $ 80
Cu metallo 5$ Cu metal $ 5
Zingometallo 14,97002$ Zingometallo $ 14.97002
Eh metallo 0,0003$ Eh metal $ 0.0003
In metallo 0,007$ Metal $ 0.007
Au metallo 0,00018$ Au metal $ 0.00018
[Jo triossido 0,Q2# [Jo trioxide 0, Q2 #
Fe metallo 0,0025# Fe metal 0.0025 #
ren^eratura di fusione da 845? C. a 860? -C_. casting yield from 845? C. to 860? -C_.
Esempio nr.2 Example 2
[argento metallo 92*5# [silver metal 92 * 5 #
bu metallo 5# bu metal 5 #
Siine o metallo 2 , 47002# Siine or metal 2, 47002 #
Iti metallo 0,0003# Iti metal 0.0003 #
In metallo 0,007# Metal 0.007 #
lu metallo 0 ,00018# lu metal 0,00018 #
?lio triossido 0,02# ? lio trioxide 0.02 #
jFe metallo 0,025# jFe metal 0.025 #
lemperatura di fusione da 845? 0. a 860?0. la lega di argento ottenuta con queste due formule ha_ un ?el colore "bianco e presenta una fortissima resisten^ jsa alla ossidazione , guando viene immessa in una so-, luz ione cono entrata di HC1 ? S in soluzione acquo-p sa per un periodo di circa 5 ore. melting temperature from 845? 0. to 860? 0. the silver alloy obtained with these two formulas has a white color and has a very strong resistance to oxidation, when it is introduced into an inlet solution of HC1? S in aqueous solution for a period of about 5 hours.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT82007A IT1238862B (en) | 1989-10-23 | 1989-10-23 | Oxidation-resistant silver alloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT82007A IT1238862B (en) | 1989-10-23 | 1989-10-23 | Oxidation-resistant silver alloy |
Publications (3)
Publication Number | Publication Date |
---|---|
IT8982007A0 IT8982007A0 (en) | 1989-10-23 |
IT8982007A1 true IT8982007A1 (en) | 1991-04-23 |
IT1238862B IT1238862B (en) | 1993-09-03 |
Family
ID=11317430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT82007A IT1238862B (en) | 1989-10-23 | 1989-10-23 | Oxidation-resistant silver alloy |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1238862B (en) |
-
1989
- 1989-10-23 IT IT82007A patent/IT1238862B/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
IT8982007A0 (en) | 1989-10-23 |
IT1238862B (en) | 1993-09-03 |
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